US 4,865,214 AGrant
Step-on Wastebasket
Issue Date:1989-09-12
•16 Claims
•10 Drawing Sheets
Abstract
A wastebasket includes a container having a top opening, and a lid mounted on the container and adapted to pivot about a pivot axis to cover and uncover the top opening. A mechanism for actuating pivotal movement of the lid with respect to the container is provided. The mechanism includes a generally horizontal operating lever having a foot pedal, a depending flange joined to the lid, and a rod linkage interconnecting the operating lever and the flange. The lid flange has an elongated slot formed through its thickness. The slot includes a channel and two enlargements situated at opposite ends of the channel. The rod linkage slides through the channel into one of the two enlargements, and engages the lid flange at either enlargement to pivot the lid between positions covering and uncovering the container. A U-shaped member having legs is pivotally mounted on the lid flange and is adapted to pivot with its legs across the elongated slot near one of the enlargements to help keep the rod linkage from inadvertently slipping out of the enlargement and into the channel of the slot when lid is being pivoted to a position uncovering the container.
Metadata
Assignee
- Mobil Oil Corporation
Inventors
- Walter Koda
- Carl Meyerhoefer
- David C. Miller
- Thomas J. Pendleton
- Maria-Teresa Smith
Application Information
Application Number:US 2279401
Filing Date:1988-08-03
Priority Date:1987-10-19
Art Unit:241
Classifications
IPC:
B65D 4300
Field of Search:
220262;263;264;1 T
Patent Drawings (10 sheets)
Description
Background of the Invention
1. Field of the Invention
This invention relates to wastebaskets or trash receptacles, and more particularly relates to a wastebasket with a pivoting lid which opens and closes by operation of a foot pedal.
2. Description of The Prior Art
U.S. Pat. No. 2,475,125 to Brownell discloses a foot pedal operated receptacle. One of the primary features of the receptacle disclosed in the Brownell patent is that the lid of the receptacle will open and close in response to actuation of the foot pedal.
This feature of the Brownell receptacle is provided by a straight slot 40 formed in a hinge element 39 joined to the lid. The slot is sloped from the vertical, and has first and second end enlargements 41, 42, one being higher than the other, depending on whether the lid is open or closed. A link member 16 interconnects the hinge element's slot with the foot pedal 15.
When the lid is closed and the foot pedal is stepped on, the link member engages the lower first enlargement and pivots the lid to an open position. When the foot pedal is released, the link member slides down to the second enlargement, which is now the lower of the two. When the foot pedal is stepped on again, the link member now engages the lower second enlargement and pivots the lid in an opposite direction back to the closed position.
The receptacle disclosed in the Brownell patent has a number of disadvantages inherent in its design. One problem relates to the mechanism for pivoting the lid. The slot formed in the lid hinge member is straight and is not particularly shaped to guide the link member between enlargements. The receptacle is configured so that the link member 16 alternately tilts towards whichever enlargement is lower, that is, toward and away from the receptacle's casing 10, to ensure that it properly engages the enlargement to pivot the lid. The link member must be pivotally connected to the foot pedal at a point which is directly below the lid's pivot axis, or at most between the two enlargements, so that it will tilt in the proper direction, as shown in FIG. 1 of the Brownell patent. Accordingly, the foot pedal must extend beyond the periphery of the casing 10 so that it may be joined to the link member at a point below the lid's pivot axis.
If the link member's connection to the foot pedal were situated closer to the receptacle's casing, the link member would not be properly directed towards the more inner enlargement 4-. As a result, when the foot pedal is depressed, the link member may not properly engage the enlargement, and may slip out of the enlargement into the slot.
Thus, with the design taught by the Brownell patent, the link member 16 and the portion of the pedal to which it is connected must protrude relatively far beyond the periphery of the receptacle's casing. Not only is it unsightly to see the linkage between the pedal and lid protruding beyond the confines of the casing, but also it makes the receptacle undesirable for use in areas of limited space. For example, the receptacle cannot be placed close to a wall, as space must be provided for the link member and rear portion of the foot pedal.
Also, because the linkage is exposed, it remains unprotected. The linkage, and in particular link member 16, may become bent or damaged and fail to operate properly if the Brownell receptacle fell on its side.
Furthermore, the foot pedal 15 protrudes outwardly from the front side of casing 10 diametrically opposite from the exposed link member. This exacerbates the problem of using the wastebasket in confined areas, as the protruding pedal and link mechanism add to the overall dimensions of the receptacle.
Yet another disadvantage of the Brownell receptacle and of many prior art pedal operated receptacles is that the pedal is of too limited size. The pedal on many such receptacles are narrow in width, and are about the size of the user's foot. The pedal covers only a small area of the receptacle's periphery, which makes it more difficult for the user to properly position his foot on the foot pedal, and requires the user to stand usually in a particular position close to the receptacle in order to operate the pedal.
Objects and Summary of the Invention
It is an object of the present invention to provide a wastebasket or trash receptacle having a lid which may be opened and closed by actuation of a foot pedal.
It is another object of the present invention to provide a pedal operated wastebasket which is perfectly adaptable for use in confined areas.
It is a further object of the present invention to provide a wastebasket having a wide foot pedal which may be stepped on at substantially any point on the pedal to open and close the lid of the wastebasket.
It is yet another object of the present invention to provide a wastebasket having a foot pedal and interconnecting linkage to the lid which are substantially recessed so that they do not protrude from the general outline of the wastebasket.
It is still another object of the present invention to provide a wastebasket which is more aesthetically pleasing in appearance than conventional pedal operated wastebaskets.
It is yet another object of the present invention to provide a wastebasket which overcomes the inherent disadvantages of known wastebaskets, including that disclosed in U.S. Pat. No. 2,475,125 to Brownell.
In accordance with one form of the present invention, a wastebasket includes a container and a lid pivotally mounted on the container. The container includes a top opening. The lid is adapted to pivot on the container to cover and uncover the top opening.
The wastebasket also includes a mechanism to open and close the lid. The mechanism includes a generally horizontal operating lever (i.e., a foot pedal and its associated parts) mounted on the container, and a depending flange mounted on the lid, which flange has a slot formed through its thickness. The mechanism also includes a link member, such as an elongated metal rod, interconnecting the operating lever with the lid flange.
The slot formed in the lid flange includes an elongated channel, and first and second enlargements situated at opposite ends of the channel. The slot is generally sloped to the vertical so that one enlargement will always be higher than the other, the relative heights of the enlargements reversing when the lid is opened and closed.
The upper end of the link member slides in the slot between the first and second enlargements. When the foot pedal of the operating lever is stepped on and the lid is in the closed position covering the top opening of the container, the link member engages the lid flange at the first enlargement, which is lower than the second, and exerts a force on the flange to pivot the lid to the open position. When the lid is in the open position, the second enlargement is now the lower one. Releasing the foot pedal allows the upper end of the link member to slide by gravity to the lower second enlargement. Stepping on the foot pedal while the lid is in the open position causes the upper end of the link member to engage the lid flange at the second enlargement and exert a force on the flange to pivot the lid in the opposite direction to the closed position.
The foot pedal of the operating lever extends substantially across the entire front of the wastebasket. The foot pedal and operating lever are reinforced by ribs on their undersides so that if the foot pedal is stepped on at any point over its width, it will open or close the lid.
Also, the foot pedal is exposed but recessed inwardly of the wastebasket's general outline, and the link member is substantially disposed within a channel formed in the back of the wastebasket. Thus, neither the foot pedal nor the link member protrudes to any substantial degree from the wastebasket, providing the wastebasket with a slim line and aesthetically pleasing appearance, and providing protection for the link member.
In another form of the present invention, a U-shaped member is mounted in a hole formed in the lid flange above the elongated slot. The member hangs by gravity from the hole, and has a length such that it extends below the slot.
The U-shaped member contacts the end of the link member which slides in the slot, and urges the link member toward the first enlargement. This action further helps to keep the link member in the first enlargement and prevent it from inadvertently slipping into the channel portion of the slot when the wastebasket foot pedal is stepped on slowly, when opening the lid. When the lid is fully opened, the U-shaped member swings away from the first enlargement, allowing the link member to slide into the second enlargement when pressure on the foot pedal is released, and will return to its initial position when the lid closes again.
A preferred form of the wastebasket, as well as other embodiments, objects, features and advantages of this invention, will be apparent from the following detailed description of illustrative embodiments thereof, which is to be read in connection with the accompanying drawings.
Brief Description of the Drawings
FIG. 1 is a front perspective view of a wastebasket formed in accordance with the present invention.
FIG. 2 is a side perspective view of the wastebasket shown in FIG. 1.
FIG. 3 is a rear perspective view of a portion of the wastebasket.
FIG. 4 is a rear perspective view of a portion of the wastebasket taken from a different angle than that of FIG. 3.
FIG. 5 is a rear elevational view of the wastebasket shown in FIG. 1.
FIG. 6 is a sectional view of the wastebasket, taken along line 6--6 of FIG. 5.
FIG. 7 is a rear elevational view of a portion of the wastebasket.
FIG. 8 is an enlarged view of that portion of the wastebasket shown in the circle A of FIG. 6.
FIG. 9 is a bottom plan view of the lid of the wastebasket.
FIG. 10 is a top plan view of the wastebasket without the lid.
FIG. 11 is a sectional view of the lower portion of the wastebasket, taken along line 11--11 of FIG. 10.
FIG. 12 is an enlarged view of that portion of the wastebasket shown in circle B of FIG. 10.
FIG. 13 is a sectional view of a portion of the wastebasket, taken along line 13--13 of FIG. 10, with the lid shown in dashed lines.
FIG. 14 is a top plan view of the foot pedal portion of the wastebasket.
FIG. 15 is a bottom plan view of the foot pedal portion shown in FIG. 14.
FIG. 16 is a rear elevational view of the foot pedal portion shown in FIG. 15
FIG. 17 is a sectional view of the foot pedal portion shown in FIG. 15, taken along line 17--17 of FIG. 15.
FIGS. 18a through 18d are sectional views of the lid movement actuation flange of the wastebasket, illustrating in sequence its operation in opening and closing the lids.
FIG. 19 is a perspective view of the lid movement actuation flange, modified in accordance with another embodiment of the present invention.
FIGS. 20a through 20d are sectional views of the modified lid flange shown in FIG. 19, illustrating in sequence its operation in opening and closing the lid.
FIGS. 21a and 21b are sectional views of the lid hinge portion of the wastebasket, depicting the lid in closed and open positions, respectively.
FIG. 22 is a sectional view of the lid flange shown in FIG. 19, taken along line 22--22 of FIG. 19.
Detailed Description of the Preferred Embodiments
Referring initially to FIGS. 1 through 10 of the drawings, it will be seen that a wastebasket formed in accordance with the present invention basically includes a container 2 having an open end 4, and a lid 6 pivotally mounted on the container to cover and uncover the open end.
In its preferred form, the container 2 has an overall rectangular shape when viewed from above, and includes an upper section 8 and a lower section 1 on which the upper section 8 rests. The upper section 8 consists of a front wall 12, a rear wall 14, two opposite lateral walls 16, and a bottom wall 18, all of which are joined together at substantially rounded corners. The walls 12-16 of the upper section taper slightly inwardly from top to bottom at about a 3.degree. angle from the vertical.
The lower section 10 includes parallel side walls 20 set inwardly from the walls of the upper section 8. As will be described, lower section 10 provides an interior area for mounting the foot pedal 22 and operating lever 24 for opening and closing the lid.
The upper edges of the walls 12-16 of the container are joined together to form a rim 26. Preferably, as shown in FIG. 8, the rim 26 is downturned on the outside of the container, and includes a flat horizontal portion 28 and a downwardly sloping edge portion 30 extending from the horizontal portion. The downturned rim 26 strengthens the container at its open end 4.
As shown in FIG. 10, the container rim 26 extends continuously about the open end of the container except where it partially defines a channel 32, and in two other places where it terminates to define slots 34. The function of the channel 32 and slots 34 will be described in detail later.
The front wall 12 of the container includes an inwardly sloping lower wall 36 which, as shown more clearly in FIG. 6, defines a recess 38 across the entire front of the wastebasket for receiving the foot pedal 22. The slope and height of the lower wall 36 and the outward length of the foot pedal 22 are chosen so that the foot pedal does not substantially extend beyond the plane of the front wall 12, as illustrated by the dashed lines in FIG. 6. With this configuration, the foot pedal 22 of the wastebasket does not protrude beyond the general outline of the wastebasket, and yet is exposed for easy access.
The lid 6 of the wastebasket is substantially rectangular in shape to conform to the overall shape of the container 2. It includes a generally flat or slightly convex top wall 40, and a rim 42 which extends about the periphery of the top wall 40 and slopes downwardly and outwardly from the top wall. The lid rim 42 substantially parallels the edge portion 30 of the container rim and extends to or slightly below the edge of the container rim 26 so that it can mount closely on the container and hide the container rim from view when the lid is in the closed position covering the container's open end 4.
The lid 6 further includes two support members 44 which project downwardly from the underside of the lid's top wall 40, as shown in FIGS. 8 and 9. The support members 44 engage the horizontal portion 28 of the container rim at the two front corners of the container, and function to support the lid on the rim 26 of the container.
As mentioned earlier, the lid 6 is mounted on the container 2 and is pivotable between a closed position, covering the container's open end 4, and an open position, where it is in a substantially upright, vertical disposition uncovering the open end. The structure for mounting the lid on the container is shown in FIGS. 3-5, 7, 9 and 10 and will now be described.
Two pairs of parallel, spaced apart ribs 46 are provided on the container. The ribs 46 of each pair straddle a corresponding slot 34 formed in the container rim and extend outwardly from the rear wall 14 of the container and downwardly from the container rim 26. A pin 48 extends from one rib 46 of each pair partially across the gap between the ribs, providing enough space between the free end of the pin 48 and the adjacent rib to allow a hinge element of the lid to be inserted between them.
The lid includes a pair of spaced apart hinge elements 50 formed as planar, depending members joined to the top wall 40 and rim 42 of the lid. Each hinge element 50 is formed with an aperture 52 through its thickness, which aperture receives a corresponding mounting pin 48. The lid is mounted on the container by force-fitting the hinge elements 50 between the ribs 46 of the container and onto the mounting pins 48. Portions of the lid hinge elements 50 are received in the slots 34 of the container rim. The rim slots 34 allow the lid to be seated closely on the container rim 26 without the lid hinge elements interfering with the fit of the lid on the container.
Each hinge element 50 further includes a stop surface 51, which surface can engage the rear wall 14 of the container to keep the lid in an open, upright position.
An alternative to the stop surface 51 is the lid stop shown in FIGS. 21a and 21b. The lid stop basically is formed from a notched out portion of the lid hinge element 50 to define an abutment 53. A cooperating abutment 55 is formed from notching out a thickened top portion 57 of the wastebasket's rear wall 14. The two abutments 53, 55 engage each other when the lid is fully opened, as illustrated by FIG. 21b.
The advantage of the lid stop shown in FIGS. 21a and 21b over the stop surface 51 described previously is that the reactive stopping force between the lid 6 and the container portion 2 resides essentially vertically, that is, in the plane of the rear wall 14, as opposed to perpendicularly to the rear wall, as in the case when stop surface 51 is provided and engages the rear wall 14. Accordingly, the top portion of the wastebasket's rear wall 14 is less likely to flex or buckle when excessive force is applied in opening the lid 6.
The wastebasket of the present invention is further provided with a foot operated pedal mechanism for both opening and closing the lid. This structure is shown generally in FIG. 6 and in greater detail in FIGS. 11-18.
A generally horizontally disposed operating lever 24 is mounted in the lower section 10 of the wastebasket. The operating lever 24 includes an intermediate portion 56, and front and rear portions 58, 60 disposed on opposite sides of the intermediate portion. The operating lever 24 is generally planar in its overall configuration, although the front portion 58 and rear portion 60 are slightly displaced from the intermediate portion 56 at higher and lower levels, respectively.
The operating lever 24 is pivotally mounted on the container. For this purpose, a pair of mounting pins 62 are provided on the lever at its intermediate portion 56, and extend outwardly from opposite lateral sides of the lever. The mounting pins 62 are received in corresponding apertures 64 formed through the thickness of opposite walls 20 of the lower section 1. In this way, the operating lever is held in place at the bottom of the container.
The front portion 58 of the operating lever includes a foot bar or pedal 22. The foot pedal 22 is formed as a flat elongated member which is joined to the intermediate portion 56 through a slot 68 formed on a front wall of the lower section 10. As mentioned previously, the foot pedal 22 is disposed on the front wall 12 of the container and resides in the recess 38 defined by the sloping lower wall 36.
The foot pedal 22 has a width which allows it to extend substantially across the entire width of the front wall 12, as opposed to many conventional, pedal operated trash receptacles that have foot sized pedals. The wide foot pedal or foot bar 22 of the present invention makes it more convenient for the user to open and close the wastebasket lid, as he does not have to stretch or take particular aim to actuate the foot pedal 22 as he would with the conventional wastebaskets described above.
The rear portion 60 of the operating lever includes a free end formed with an upturned flange 70. An aperture 72 is formed through the thickness of the flange 70 and, as will be seen, is provided for receiving one end of a linkage interconnecting the operating lever 24 with the lid 6.
The operating lever 24 pivots in a seesaw-type fashion, with the mounting pins 62 at the intermediate portion acting as a fulcrum, whenever pressure is exerted on the foot pedal 22 or released from the pedal. One of the advantages of the present invention is that pressure may be exerted at any point on the foot pedal 22 to actuate the mechanism which opens and closes the lid. Thus, the foot pedal and operating lever must be substantially rigid, and not flex under the pressure of one's foot or the opposing weight of the lid pivoting mechanism, and yet their design must meet desired design criteria of making a substantial portion of the wastebasket from plastic materials and by molding techniques.
To meet these criteria, the underside of the foot pedal 22 and front portion 58 of the operating lever is formed with a plurality of criss-crossed, diagonal stiffening ribs 74 joined to and extending perpendicularly downwardly from a top wall 76 of each, and the rear portion 60 of the operating lever is formed with parallel rows and columns of stiffening ribs 78 also depending perpendicularly from the top wall 76 of the operating lever. The stiffening ribs 74, 78 provide the foot pedal and operating lever with strength and rigidity so that pressure exerted just about anywhere on the foot pedal will open or close the lid.
A linkage is provided between the operating lever 24 and the lid 6 to transmit the pivotal movement of the lever to the lid. Preferably, the linkage is an elongated metal rod 80 having hooked ends. One end of the rod 80 is received in the flange aperture 72 of the operating lever, and the other end is joined to the lid, as will be described.
The rod 80 is mostly housed in the channel 32 formed in the rear wall of the container, which channel extends vertically between the rim 26 and the lower section 10. As seen in FIG. 6, the rod 80 does not protrude from the general periphery of the wastebasket. This not only provides the wastebasket with a more aesthetically pleasing appearance than the Brownell pedal operated wastebasket, but also protects the rod linkage from damage and allows the wastebasket to be used in a confined space and closer to a wall without interfering with the lid opening and closing mechanism.
As shown in FIGS. 6 and 9, the lid 6 is formed with a plate-like flange 82 depending from the top wall 40 and rim 42 of the lid and situated generally at the lid's pivot axis. The flange 82 is also disposed vertically in alignment with the channel 32 of the container so that it is in proper position for connection with the rod linkage 80.
The flange 82 defines an elongated slot 84 which is formed through its thickness. The slot 8 is sloped to the vertical in one direction when the lid is closed (see FIG. 18a), and is sloped to the vertical in an opposite direction when the lid is open (FIG. 18c).
As more specifically shown in FIG. 18a, the slot 84 is formed with a central channel 86 and two enlargements 88, 90 disposed at opposite ends of the channel. The enlargements 88, 90 extend upwardly in the lid flange beyond the transverse width of the channel 86, providing the slot with a slight concave or U-shaped configuration. One enlargement 88 is situated more inwardly toward the container's rear wall and on the inner side of the lid pivot axis when the lid is in the closed position. The other enlargement 90 is situated more outwardly of the rear wall and on the outer side of the pivot axis when the lid is in the open position.
The lid flange slot 84 receives the upper hooked end of the rod linkage 80. The slot 84 is dimensioned so that the upper end of the rod fits into either enlargement 88, 90 and may freely slide through the channel 86 of the slot between the enlargements.
The combined weight of the rod linkage 80 and rear portion 60 of the operating lever (i.e., rearward of the lever mounting pins 62) is chosen to be greater than the weight of the foot pedal 22 and forward portion 58 of the operating lever (i.e., forward of the mounting pins). In this way, the foot pedal 22 will rise freely when pressure on the pedal is released, and the upper end of the rod linkage 80 will slide freely by gravity from whichever enlargement is higher, through the channel 86 and into the lower enlargement.
The operation of the lid opening and closing mechanism described above can be explained in the sequence illustrated by FIGS. 18a through 18d. FIG. 18a shows the lid 6 in a closed position covering the container opening. When the lid is in this position, the slot 84 is sloped inwardly, with the inner enlargement 88 being lower than the outer enlargement 90. The rod 80 rests in the inner enlargement 88, and the foot pedal 22 is in a raised condition on the front wall of the container.
When the foot pedal 22 is stepped on, the operating lever 24 pivots to raise the rod 80 into the top of the inner enlargement 88. The rod exerts a force on the lid flange 82 sufficient to raise the lid from the container and pivot it about the lid mounting pins 48 to a substantially vertical, upright position uncovering the container opening, as shown in FIG. 18b. In this position, the inner enlargement 88 is now higher than the outer enlargement 90.
When pressure on the foot pedal 22 is released, the rod 80 slides from the now higher, inner enlargement 88, through the channel 86 and into the lower outer enlargement 90, as shown in FIG. 18c, and the foot pedal 22 returns to its raised state due to the greater weight of the rear portion 60 of the operating lever and the rod 80.
If the foot pedal 22 is stepped on again, the upper end of the rod linkage 80 will be raised by the operating lever into engagement with the lid flange 82 at the top of the outer enlargement 90. The rod 80 exerts a force on the lid flange 82 causing the lid to swing about the pivot axis in the opposite direction to a closed position covering the container, as shown in FIG. 18d. The slope of the flange slot 84 has now reversed and the outer enlargement 90 is higher. Releasing the foot pedal 22 will allow it to rise and will let the rod 80 slide from the higher outer enlargement 90 through the channel 86 to the lower inner enlargement 88.
As mentioned previously, one of the objectives of the invention is to provide a wastebasket whose lid pivoting mechanism does not protrude from the general periphery of the wastebasket to any great degree. To meet this objective, substantially the entire operating lever, including its flange 70 to which the rod linkage 80 is pivotally connected, is housed with the lower section 10 of the container, and the rod linkage 80 resides almost entirely within the channel 32. Thus, unlike the linkage of the receptacle disclosed in the Brownell patent, the flange 70 is not positioned below the lid pivot axis, but rather is situated more inwardly of the container. Also, rod 80 does not alternately tilt to opposite sides of the vertical, but rather is always tilted away from the container.
To ensure that the rod linkage moves in the desired direction during the lid opening and closing operation, the lid flange 82 is particularly shaped to help guide the rod 80. More specifically, the lid flange includes a ridge 92 which protrudes into the slot 84 at its lower side between the inner enlargement 88 and the channel 86. The ridge 92 defines a slight constriction in the channel.
Without such a ridge 92 for guiding the rod, when pressure is gradually exerted on the foot pedal 22 to open the lid so that the rod 80 rises rather slowly, it is possible for the rod to slip out of the inner enlargement 88 and into the channel 86 rather than properly engage the lid flange at the top of the inner enlargement. The ridge 92, on the other hand, helps direct the rod 80 towards the top of the inner enlargement 88, and the constriction it presents between the enlargement 88 and channel 86 helps prevent the rod from slipping into the channel under the conditions described above. The ridge 92 also provides a well defined, curved seat surface 94 at the bottom of the inner enlargement 88 into which the rod 80 will come to rest when the lid is in the closed position so that the rod is properly seated in the enlargement 88 below that portion of the lid flange it is to engage when the foot pedal is actuated.
It has also been found that the rod 80 will correctly slide into place within the outer enlargement 90 and will be properly directed towards the top of the enlargement when the foot pedal is stepped on if a portion 96 of the channel at the entrance to the enlargement 90 is turned upwardly at an angle A from the rest of the channel 86. The preferred angle A of slope at channel portion 96 is about 15.degree. to 20.degree. and is optimally set at 18.degree.. With such an upturned channel portion 96, the rod 80 will be properly guided as it slides between the channel and the outer enlargement 90, and will be directed to engage the lid flange at the top of enlargement 90.
Because the wastebasket of the present invention is preferably formed of a thermoplastic material and by molding, it is possible that the components of the wastebasket may vary in their tolerances. For example, the container portion 2 may be slightly smaller than expected due to shrinkage. The rod linkage 80, which is preferably formed of metal, may then be too long such that, after the wastebasket is assembled, the rod does not rest in the curved seat surface 94 of the first enlargement. In most instances when this occurs, the protrusion or ridge 92 will guide the end of the rod 0 into proper engagement with the lid flange 82 at the top of the inner enlargement 88, even when the pedal is stepped on gently.
If, however, the differences in the preferred tolerances among the lid 6, container portion 2 and rod 80 are so great that the end of the rod sits almost out of the inner enlargement, it is possible that by gently stepping on the wastebasket pedal, the rod 80 will inadvertently slip into the channel 86 of the slot rather than engage the lid flange at the to of the inner enlargement 88.
Of course, one solution to this problem is to enlarge the aperture 72 formed in the pedal's operating lever 24, which aperture receives the lower end of the rod 80. In this way, the rod will hang, in effect, from the lid flange 82 and will always rest on the curved seat surface 94 of the inner enlargement when the lid of the wastebasket is closed. However, such a solution may create too much free play among the operating lever 24, rod 80 and lid 6 such that the lid may not open and close properly when the foot pedal is stepped on.
Also, for proper operation of the wastebasket, the slot 84 formed in the lid flange should be smooth with no flash or irregularities; otherwise, the rod may not be able to slide freely in the slot between enlargements and may inadvertently become stuck in the channel 86.
An alternative form of the lid flange 82 which overcomes the problems described above is shown in FIGS. 19 and 22. As in the previously described embodiments of the present invention, the modified lid flange of FIG. 19 includes an elongated slot 84 which is formed through its thickness, which slot is sloped to the vertical, as before. The slot 84 includes a central channel 86 and two enlargements 88, 90 disposed at opposite ends of the channel.
The slot is also preferably formed with a ridge 92 and an upwardly turned portion 96, as in the previous embodiments, to help guide the end of the rod 80 towards the top of the inner enlargement 88 and as it slides between the channel and the outer enlargement 90. However, it is also envisioned to form the slot without the ridge 92 and upturned channel portion 96 such that the channel is essentially straight and of even width.
The modified lid flange shown in FIG. 19 further includes a guide member 100, preferably a U-shaped or "horseshoe" member, which member includes two parallel legs 102 joined together at a central portion 104 of the U-shaped member and having opposite free ends. The U-shaped guide member 100 is mounted on the lid flange 82 through a hole 106 formed through the thickness of the flange. With the lid in the closed position, as shown in FIG. 20a, the hole 106 may be described as being preferably positioned directly above the point where the inner enlargement 88 joins the channel 86, or approximately directly above where the ridge 92 is positioned, if such is provided.
The central portion 104 of the U-shaped member pivots in the hole 106 such that the legs 102 hang downwardly from the lid flange and swing towards and away from the inner enlargement 88 as the lid opens and closes, as will be described in greater detail in relation to FIGS. 20a through d.
The legs 102 of the U-shaped member should extend from the hole 106 far enough so that they may contact the end of the rod 80 received by the flange slot 84, whether the rod is in the inner enlargement 88 or the outer enlargement 90. Thus, the legs may have a length approximately at least equal to the distance between the hole 106 and the outer enlargement 90.
The purpose of the U-shaped member 100 is to help guide the end of the rod 80 into proper engagement with the flange at the top of the inner enlargement 88 and to help drive the rod through the channel 86 as it slides from the outer enlargement 90 to the inner enlargement 88. The operation of the lid flange, modified to include the U-shaped member 100, will now be explained in connection with FIGS. 20a through d, which illustrate the sequence of opening and closing the wastebasket lid.
FIG. 20a shows the lid 6 in the closed position. The legs 102 of the U-shaped member hang generally downwardly, in contact with the rod 80 and on one side of the rod (i.e., the right side, when viewing FIG. 20a). Since the rod is seated in the curved surface 94, and the hole 106 is preferably positioned directly above ridge 92, the legs 102 will rest against the rod at a slight angle B to the vertical of about 5.degree. due to the thicknesses of the rod and U-shaped member. Thus, the legs 102 of the member will exert a slight force on the rod 80 as it rests in the inner enlargement 88
When the foot pedal is stepped on, the rod is forced upwardly towards the top of the inner enlargement 88, and is guided in its upward movement by the slight force exerted on it by the U-shaped member 100. The member 100 in effect pushes the rod inwardly of the inner enlargement. The rod 80 cannot inadvertently "jump" from the enlargement 88 into the channel 86, because the U-shaped member 100 is blocking the entrance into the channel. Also, because the rod contacts the member 100 at the upper portion of its legs 102 relatively close to the member's pivot point, a greater moment force would be required to pivot the member. Accordingly, the U-shaped member 100 will not swing out of the way and open the channel to the rod when the rod contacts it, and will remain disposed substantially transversely across the slot between the inner enlargement 88 and the channel 86.
As shown in FIG. 20b, the lid 6 has now pivoted to an open position. The rod 80 is in engagement with the lid flange at the top of the inner enlargement 88. When the lid is in the open position as shown, the U-shaped member 100 pivots in the lid flange hole 106 so that its legs 102 swing downwardly by gravity away from the inner enlargement 88 and come to rest in a vertically suspended position diagonally across the channel 86 of the slot.
In this position, it is now generally the lower portions of the legs 102 (i.e., portions nearer the free ends of the legs) of the U-shaped member that are disposed across the channel. Also, the legs 102 extend diagonally across the channel 86 with their free ends directed generally in the direction of movement of the rod 80 as it slides through the channel from the inner enlargement 88 to the outer enlargement 90. Less force need be exerted by the rod on the U-shaped member 100 to pivot the legs away from the channel 86 (that is, to the right, when viewing FIG. 20b) than when the lid was in the closed position shown in FIG. 20a.
Accordingly, when the foot pedal is released, the rod will slide from the inner enlargement 88 and through the channel 86 and will push the legs 102 out of its path until the rod comes to rest in the outer enlargement 90, as shown in FIG. 20c. The length of the legs 102 of the U-shaped member are such that the legs will always be on one side of the rod 80 (that is, on the right side, when viewing FIG. 20c).
When the foot pedal is stepped on with the lid in the open position, the rod 80 will engage the lid flange at the top of the outer enlargement 90. As it does so, the rod will lift the free ends of the legs 102. The lid 6 will then return to a closed position, as shown in FIG. 20d. When the foot pedal is released, the rod will slide from the outer enlargement 90, through the channel 86 and into the inner enlargement 88. The legs 102 of the U-shaped member, which were supported by the rod, will swing downwardly, following the rod 80 through the slot (i.e., to the left or clockwise in FIG. 20d). The momentum of the member 100 will help drive the rod 80 through the channel and into the inner enlargement 88 whereupon the sequence of opening and closing the wastebasket lid is completed.
The U-shaped member 100 is preferably formed of metal, although other materials may be suitable for use. Since the rod continually contacts the side of the U-shaped member, each leg 102 of the member may include a sleeve 108 mounted on it and made from polyethylene or other material to minimize friction and wear between the rod 80 and the U-shaped member 100. The sleeve 108 is also advantageous in that it may be used to add weight to the member, especially at the lower free end portions of the legs 102. This weight adds to the momentum of each leg, which helps drive the rod 80 through the slot and helps maintain the rod in the inner enlargement 88 when the foot pedal is first stepped on to open the lid.
Although the guide member 100 is described as being a U-shaped member with a pair of legs in this modified form of the lid flange, it is also envisioned that an L-shaped member (or half the U-shaped member) with a single elongated leg may be used, where a short mounting portion of the L-shaped member is pivotally received by the lid flange hole, and the elongated leg, joined to the mounting portion, is thus suspended from the lid flange 82 and is used to contact the end of the rod 80, in much the same manner as do the legs of the U-shaped member 100.
The present invention provides a wastebasket which takes up little space, making it quite adaptable for use in confined areas. The foot pedal and pedal linkage are confined within the overall periphery of the wastebasket and do not protrude from the wastebasket. The pedal is reinforced so that if stepped on at substantially any point, it will cause the lid to pivot on the container.
The foot pedal is also wide, extending across the entire front of the container. This makes it easier for the user to reach with his foot and step on to pivot the lid.
Actuation of the foot pedal will both open and close the lid. The particular shape of the slot formed in the lid flange ensures that the rod linkage will properly engage the lid flange at the enlargements.
The wastebasket of the present invention is perfectly adaptable for household use. It is lightweight in construction, and is formed substantially from plastic materials by conventional molding techniques.
Although illustrative embodiments of the present invention have been described herein with reference to the accompanying drawings, it to be understood that the invention is not limited to those precise embodiments, and that various other changes and modifications may be effected therein by one skilled in the art without departing from the scope or spirit of the invention.
Claims
What is claimed is:
1. A wastebasket, which comprises: a container having a top opening formed therein; a lid pivotally mounted on the container and adapted to pivot about a pivot axis to cover and uncover the top opening; means for pivotally mounting the lid on the container; and means for actuating pivotal movement of the lid with respect to the container between positions covering and uncovering the top opening, the lid movement actuating means including a generally horizontal operating lever mounted on the container at the lower portion thereof, means defining a slot mounted on the lid and situated thereon generally at the pivot axis, and link means operatively interconnecting the operating lever and slot defining means and having an upper end portion; the slot being defined with an elongated channel, and with first and second enlargements situated at opposite ends of the elongated channel and disposed on opposite sides of the pivot axis, the first enlargement being disposed at a lower level than the second enlargement when the lid is in a closed position covering the top opening, and the second enlargement being disposed at a lower level than the first enlargement when the lid is in an open position uncovering the top opening, the upper end portion of the link means being adapted to slide in the slot between the first and second enlargements; the slot defining means further including a guide member for guiding the upper end portion of the link means in its movement in the slot, the guide member being pivotally mounted on the slot defining means of the lid and being adapted to pivot to a position across the slot near the first enlargement thereof to help maintain the upper end portion of the link means in the first enlargement when the operating lever is actuated and the lid is in a closed position, whereby actuation of the operating lever when the lid is in the closed position causes the upper end portion of the link means to engage the slot defining means at the first enlargement and exert a force thereon to pivot the lid to the open position, and whereby actuation of the operating lever when the lid is in the open position causes the upper end portion of the link means to engage the slot defining means at the second enlargement and exert a force thereon to pivot the lid to the closed position.
2. A wastebasket as defined by claim wherein the guide member is pivotally mounted on the slot defining means at a point disposed above the slot when the lid is in the closed position.
3. A wastebasket as defined by claim 1, wherein the guide member is pivotally mounted on the slot defining means at a point disposed approximately above where the first enlargement joins the elongated channel of the slot when the lid is in the closed position.
4. A wastebasket as defined by claim 3, wherein the guide member includes a first portion pivotally mounted on the slot defining means, and a second portion joined to the first portion and extending therefrom, the second portion being selectively disposed across the slot.
5. A wastebasket as defined by claim 4, wherein the second portion of the guide member is in the form of an elongated leg having one end joined to the first portion of the guide member and an opposite free end.
6. A wastebasket as defined by claim 5, wherein the leg of the guide member has a length which is at least about equal to th distance between the point at which the guide member is pivotally mounted on the slot defining means and the second enlargement of the slot.
7. A wastebasket as defined by claim 5, wherein the guide member includes a sleeve mounted on the leg.
8. A wastebasket as defined by claim 7, wherein the sleeve is formed of a polyethylene material.
9. A wastebasket as defined by claim 1, wherein the slot defining means further defines a ridge protruding inwardly of the slot and situated at the end of the channel near the first enlargement; and wherein the guide member is pivotally mounted on the slot defining means at a point disposed approximately above where the ridge is situated when the lid is in the closed position.
10. A wastebasket as defined by claim 1, wherein the guide member is in the form of a U-shaped member having a central portion which is pivotally mounted on the slot defining means, and a pair of legs joined to and extending from the central portion.
11. A wastebasket, which comprises: a container having a top opening formed therein; a lid mounted on the container and adapted to pivot about a pivot axis to cover and uncover the top opening; and means for actuating pivotal movement of the lid with respect to the container between positions covering said uncovering the top opening, the lid movement actuating means including a generally horizontal operating lever pivotally mounted on the container at a lower portion thereof, means defining a slot mounted on the lid and situated thereon generally at the lid pivot axis, and link means interconnecting the operating lever and slot defining means; the operating lever having an intermediate portion pivotally mounted on the container, and front and rear portions disposed on opposite sides of the intermediate portion, the front portion including an operating pedal; the link means being joined to the operating lever at the rear portion thereof and extending upwardly therefrom to the slot defining means, the link means including an upper end portion slidably engageable in the slot, the link means being adapted to be raised and lowered by pivotal movement of the operating lever; the slot being defined with an elongated channel, and with first and second enlargements situated at opposite ends of the elongated channel and disposed on opposite sides of the pivot axis; the slot defining means including a ridge protruding inwardly of the slot and situated at the end of the channel near the first enlargement, and defining the channel with a portion which is upwardly turned at an angle toward the second enlargement; the slot defining means further including a guide member for guiding the upper end portion of the link means in its movement in the slot, the guide member being in the form of a U-shaped member having a central portion and a pair of legs joined to and extending from the central portion, the central portion being pivotally received by a hole formed in the slot defining means of the lid, the hole being situated above the slot and near the first enlargement thereof when the lid is in the closed position, the legs of the U-shaped member being pivotable between a first position, wherein the legs are disposed across the slot near the first enlargement thereof to help maintain the upper end portion of the link means in the first enlargement when the operating lever is actuated and the lid is in a closed position, and a second position, wherein the legs are disposed away from the first enlargement to allow the upper end portion of the link means to move from the first enlargement through the channel to the second enlargement when the lid is in the open position; wherein the upper end portion of the link means is received by the first enlargement and guided by the ridge and the U-shaped member into engagement with the lid flange at the top of the first enlargement when the link means is raised by the operating lever to pivot the lid to the open position, the upper end portion sliding through the channel from the first enlargement to the second enlargement when the lid is in the open position and pressure on the operating pedal is released, and wherein the upper end portion engages the slot defining means at the top of the second enlargement when the link means is raised by the operating lever to pivot the lid to the closed position, the upper end portion sliding through the channel from the second enlargement to the first enlargement when the lid is in the closed position and pressure on the operating pedal is released.
12. A wastebasket, which comprises: a container having a top opening formed therein; a lid pivotally mounted on the container and adapted to pivot about a pivot axis to cover and uncover the top opening; means for pivotally mounting the lid on the container; and means for actuating pivotal movement of the lid with respect to the container between positions covering and uncovering the top opening, the lid movement actuating means including a generally horizontal operating lever mounted on the container at the lower portion thereof, means defining a slot mounted on the lid and situated thereon generally at the pivot axis, and link means operatively interconnecting the operating lever and slot defining means and having an upper end portion; the slot being defined with an elongated channel, and with first and second enlargements situated at opposite ends of the elongated channel and disposed on opposite sides of the pivot axis, the first enlargement being disposed at a lower level than the second enlargement when the lid is in a closed position covering the top opening, and the second enlargement being disposed at a lower level than the first enlargement when the lid is in an open position uncovering the top opening, the upper end portion of the link means being adapted to slide in the slot between the first and second enlargements; the slot defining means further including a guide member for guiding the upper end portion of the link means in its movement in the slot, the guide member being pivotally mounted on the slot defining means of the lid and being adapted to pivot from a first position, wherein at least a portion of the guide member is disposed across the slot near the first enlargement thereof to help keep the upper end portion of the link means in the first enlargement when the operating lever is actuated and the lid is in a closed position, to a second position, wherein said portion of the guide member is disposed away from the first enlargement to allow the upper end portion of the link means to move from the first enlargement through the channel to the second enlargement when the lid is in the open position, whereby actuation of the operating lever when the lid is in the closed position causes the upper end portion of the link means to engage the slot defining means at the first enlargement and exert a force thereon to pivot the lid to the open position, and whereby actuation of the operating lever when the lid is in the open position causes the upper end portion of the link means to engage the slot defining means at the second enlargement and exert a force thereon to pivot the lid to the closed position.
13. A wastebasket as defined by claim 12, wherein said portion of the guide member, when the guide member is in the first position, is disposed substantially transversely across the slot.
14. A wastebasket as defined by claim 12, wherein said portion of the guide member, when the guide member is in the second position, is disposed substantially diagonally across the slot and away from the first enlargement.
15. The wastebasket as defined by claim 12, wherein said portion of the guide member is an elongated leg, a first portion of the leg situated relatively near to the point at which the guide member is pivotally mounted on the slot defining means being disposed across the slot when the lid is in a closed position, and a second portion of the leg situated farther from the pivot point than the first portion being disposed across the slot when the lid is in an open position.
16. A wastebasket, which comprises: a container having a top opening formed therein; a lid pivotally mounted on the container and adapted to pivot about a pivot axis to cover and uncover the top opening; means for pivotally mounting the lid on the container; and means for actuating pivotal movement of the lid with respect to the container between positions covering and uncovering the top opening, the lid movement actuating means including a generally horizontal operating lever mounted on the container at the lower portion thereof, means defining a slot mounted on the lid and situated thereon generally at the pivot axis, and link means operatively interconnecting the operating lever and slot defining means and having an upper end portion; the slot being defined with an elongated channel, and with first and second enlargements situated at opposite ends of the elongated channel and disposed on opposite sides of the pivot axis, the first enlargement being disposed at a lower level than the second enlargement when the lid is in a closed position covering the top opening, and the second enlargement being disposed at a lower level than the first enlargement when the lid is in an open position uncovering the top opening, the upper end portion of the link means being adapted to slide in the slot between the first and second enlargements; the slot defining means further including a guide member for guiding the upper end portion of the link means in its movement in the slot, the guide member being in the form of a U-shaped member having a central portion and a pair of legs joined to and extending from the central portion, the central portion being pivotally received by a hole formed in the slot defining means of the lid, the hole being situated above the slot and near the first enlargement thereof when the lid is in the closed position, the legs of the U-shaped member being pivotable between a first position, wherein the legs are disposed substantially transversely across the slot near the first enlargement thereof to help maintain the upper end portion of the link means in the first enlargement when the operating lever is actuated and the lid is in a closed position, and a second position, wherein the legs are disposed away from the first enlargement to allow the upper end portion of the link means to move from the first enlargement through the channel to the second enlargement when the lid is in the open position, whereby actuation of the operating lever when the lid is in the closed position causes the upper end portion of the link means to engage the slot defining means at the first enlargement and exert a force thereon to pivot the lid to the open position, and whereby actuation of the operating lever when the lid is in the open position causes the upper end portion of the link means to engage the slot defining means at the second enlargement and exert a force thereon to pivot the lid to the closed position.
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