Folding Multi-Tool

The present invention relates generally to a multi-function pocket tool which includes pliers and other selected tools.

Multi-function tools are well known. In typical multi-function tools, pliers and other selected tools, such as screwdrivers, knife blades, files, etc., are provided in a single tool. Known multi-function tools often include pliers and have channel-shaped handles pivotally connected to the tangs of the pliers. The handles fold over so that the pliers are received in the channel-shaped handles. Also, the other tools fold over and are received in the channel-shaped handles as well.

One disadvantage of such known arrangements is that when using the pliers of the tool, the open sides of the channel-shaped handles face outwardly, away from one another. When gripping the tool tightly to secure an object with the plier jaws, the open sides of the channel-shaped handles can become uncomfortable and can limit the amount of gripping force comfortably applied by the user.

U.S. Pat. No. 4,744,272 of Leatherman relates to a foldable tool and discloses the use of handle extensions which can be folded over to provide a broad smooth surface to be grasped and squeezed by the user's hand. This also has the effect of lengthening the tool, thereby making it less compact in operation.

U.S. Pat. No. 5,142,721 of Sessions, et al. relates to a pocket tool with retractable jaws and describes another approach to addressing this need for comfortable plier handles. The pocket tool disclosed in Sessions, et al. includes a pair of retractable jaws which slide into and out of the channel-shaped handles. This tends to add to the complexity of the tool and somewhat reduces the strength of the pliers.

Another disadvantage of such known arrangements is that to deploy an individual tool for use, the multi-function tool handles must be opened, the individual tool selected and opened, and the multi-function tool handles closed. This is somewhat cumbersome and slow.

Accordingly, it can be seen that a need remains in the art for a folding multi-tool with pliers which, when the pliers are in use, provides a smooth handgrip. A need also remains for a folding multi-tool in which the individual tools can be easily and quickly deployed for use. It is to the provision of such a folding multi-tool that the present invention is primarily directed.

Briefly described, in a first preferred form the present invention comprises a folding multi-tool with first and second generally channel-shaped handles. The handles each have first and second ends and an open side and an at least partly closed side opposite the open side. The at least partly closed sides include openings for receiving pliers. The folding multi-tool also includes pliers comprising first and second plier halves pivotally mounted to each other, with the plier halves also being pivotally mounted to the first ends of the handles. Also, the folding multi-tool is foldable between a closed, compact configuration and an opened, extended configuration for operating the pliers. In the opened, extended configuration, the open sides of the handles face each other.

Preferably, the folding multi-tool includes, in each of the handles, at least one tool pivotally mounted to the second ends for pivotal movement between a closed position and an opened position, with the tools being received in the open sides of the handles. Preferably, the individual tools can be moved from the closed positions to the opened positions while the folding multi-tool is in its closed, compact configuration. Also preferably, the partly closed sides of the folding multi-tool are provided with rounded edges for greater comfort.

Preferably, the folding multi-tool includes first and second control straps for limiting the maximum pivotal movement of the plier halves relative to the plier handles and for frictionally resisting pivotal movement of the pliers. Preferably, the plier halves each include an eccentric tang and the tangs are mounted between flanges. The eccentric tangs engage the control straps and provide greater frictional resistance to pivotal movement of the pliers with the multi-tool in the opened, extended configuration than in the closed, compact configuration. This allows the multi-tool to be easily opened, while at the same time helps to maintain the multi-tool in the opened, extended configuration once opened.

The folding multi-tool according to the invention is very comfortable to use, is extremely compact, is simple in its construction, and durable in use. The folding multi-tool according to the invention also results in strong, stable pliers, which are comfortably gripped, allowing the user to apply great force thereto. Conveniently, the invention also allows the individual tools (other than the pliers) to be used from the closed, compact configuration without opening the entire folding multi-tool.

Accordingly, it is an object of the present invention to provide a folding multi-tool with pliers and comfortable hand grips.

It is another object of the present invention to provide a folding multi-tool which allows great gripping force to be applied to the pliers of the handle comfortably.

It is another object of the present invention to provide a folding multi-tool with pliers which is relatively compact when the pliers are in use.

It is another object of the present invention to provide a folding multi-tool with strong, stable pliers.

It is another object of the present invention to provide a folding multi-tool with a plurality of individual tools which can be deployed without opening the entire multi-tool.

It is another object of the present invention to provide a folding multi-tool with a plurality of individual tools which can be easily and quickly deployed.

These and other objects, advantages, and features of the present invention will become apparent upon reading the following specification in conjunction with the accompanying drawing figures.

FIG. 1 is a perspective illustration of a folding multi-tool in a first preferred form of the invention, shown in a closed, compact configuration.

FIG. 2 is a perspective illustration of the folding multi-tool of FIG. 1, shown with some tools thereof deployed.

FIG. 3 is a perspective illustration of the folding multi-tool of FIG. 1, shown with some other tools thereof deployed.

FIG. 4 is a perspective illustration of the folding multi-tool of FIG. 1, shown in a fully opened, extended configuration.

FIG. 4A is a sectional view of the folding multi-tool of FIG. 4 taken along the lines of 4A--4A, with some elements omitted for clarity.

FIG. 5 is a perspective illustration of the folding multi-tool of FIG. 1, shown in a slightly opened configuration.

FIG. 6 is a perspective illustration of the folding multi-tool of FIG. 1, shown in a moderately opened configuration.

FIG. 7 is perspective illustration of the folding multi-tool of FIG. 1, shown in a substantially opened configuration.

Referring now to the drawing figures, wherein like reference numerals represent like parts throughout the several views, FIG. 1 shows a folding multi-tool 10 according to a preferred form of the invention. The folding multi-tool 10 depicted in FIG. 1 is shown in a closed, compact configuration, such as would be used for storing the tool in a sheath. The folding multi-tool 10 includes first and second channel-shaped handles 11 and 12.

Each oft he channel-shaped handles 11 and 12 is generally "C"-shaped in cross-section and includes an upper wall, a lower wall, and a vertically extending wall between the upper and lower walls. For example, handle 12 includes lower wall 13 and upper wall 14 and an unshown (at least in FIG. 1) vertical wall extending therebetween. Likewise, channel-shaped handle 11 includes an upper wall 16, an unshown lower wall, and a vertical wall 17 extending therebetween.

The channel-shaped handles include integral shoulders, such as shoulders 18, 19, and 20. The shoulders extend at an angle between the upper and lower walls of the handles and flange portions, such as flanges 23-26. Plier tangs 27 and 28 are positioned between the flanges 23 and 24, and 25 and 26 (the pliers will be described in more detail in connection with subsequent figures). The plier tangs 27 and 28 are mounted between the flanges for pivotal movement about pivot axes 31 and 32. The plier tangs 27 and 28 are secured in place by combination bolt/pivot pins 33 and 34 which extend through the upper flanges 23 and 25, through the plier tangs 27 and 28, and are threadedly received in the lower flanges 24 and 26. The bolts/pivot pins 33 and 34, along with the upper and lower flanges, constrain the movement of plier tangs 27 and 28 to pivotal movement about the pivot axes 31 and 32.

Extending between the upper and lower flanges are a pair of plier stops 36 and 37 for limiting the pivotal motion of the plier tangs. The plier stops 36 and 37 each include three vertical surfaces or shoulders, such as surfaces 36a, 36b, and 36c. The plier stops are generally "C"-shaped and include upper and lower flanges, such as lower flange 36d. The plier tangs 27 and 28 include tabs 27a and 28a which engage the plier stops 36 and 37, fitting between the upper and lower flanges of the plier stops and being limited in travel by the shoulders, such as shoulder 36b.

The tangs 27, 28 are eccentric and eccentrically contact an interior surface of the plier stops 36, 37 such that when the folding multi-tool 10 is in the folded, compact configuration shown in FIG. 1, the plier stops provide a modest frictional resistance to the pivotal movement of the plier tangs 27, 28, while in the unfolded, opened configuration shown in FIG. 4, the plier stops provide a greater frictional resistance to pivotal movement of the plier tangs. This allows the folding multi-tool to be opened easily and quickly, while also helping to hold the pliers in place when the folding multi-tool is in the extended configuration of FIG. 4 (making the pliers easier to use).

At the end of the handles 11 and 12 opposite the location of the plier tangs 26 and 27 a second pair of combination bolts/pivot pins is provided, in particular bolts/pivot pins 41 and 42. These bolts/pivot pins extend through the upper walls 14 and 16 of the handles and through numerous individual tools received in the channel-shaped handles, to the lower walls of the handles. Thus, the bolts/pivot pins 41 and 42 act as pivot axles to constrain movement of the various tools to pivotal motion about pivot axes 43 and 44.

A number of tools are pivotally received in the open sides of the handles 11 and 12 and are pivoted about the pivot axes 43 and 44. For example, in the illustrative embodiment shown in FIG. 1, handle 12 includes a knife 51, a Phillips screwdriver 52, and a file 53. As can be seen in FIG. 1, these tools are received in the open side of the channel-shaped handles and open outwardly therefrom. For example, the knife, Phillips screwdriver, or file 51-53 can be deployed by rotating each in the direction of direction arrow 54 to swing them outwardly from the open side of the channel-shaped handle 12. This arrangement advantageously allows the tools to be deployed from the closed, compact configuration of the folding multi-tool overall, a significant convenience. For example, in the known prior art, in order to deploy the typical tools, one must move the handles apart from one another, and then pull the individual tool out, and then close up the handles again in order to use a selected tool. By stark contrast, the present invention allows the user to select, deploy and use an individual tool without opening up the multi-tool overall.

FIGS. 2 and 3 show how the individual tools can be easily and quickly deployed without opening up the entire multi-tool. For example, in FIG. 2 the folding multi-tool 10 is shown in its closed, compact configuration with the open sides of the channel-shaped handles 11 and 12 facing away from each other. For example, as shown in FIG. 2, the channel-shaped handle 12 has an open side 56 which generally points in the direction of direction arrow 57. Likewise, channel-shaped handle 11 has an open side 58 which points in the direction of direction arrows 59, which is opposite to direction arrow 57. With this construction, the individual tools, such as knife 51, the Phillips screwdriver 52, and the file 53 can be quickly and easily deployed, without opening up the entire folding multi-tool 10.

FIG. 3 shows the deployment of other individual tools, including straight screwdriver 61, lanyard loop 62, larger straight screwdriver 63, a combination can opener and bottle opener 64, and a serrated knife 65.

Referring now to FIG. 4, the folding multi-tool 10 is shown in its open, extended configuration for using the pliers. The folding multi-tool 10 includes pliers 70 having a first plier half 71 and a second plier half 72. First plier half 71 includes tang 28, a lower platen 73 and plier jaw 74. Similarly, second plier half 72 includes plier tang 27, upper platen 76, and plier jaw 77. A large pivot pin 78 extends through the upper and lower platens and secures them to one another and acts as a pivot axle to allow the first and second plier halves 71 and 72 to be pivoted relative to each other. As can be seen in this figure, the plier stops, such as plier stop 37, limit the pivotal movement of the tangs 27 and 28 to allow the handles 11 and 12 to operate the pliers.

As previously described, the handles 11 and 12 include open sides 56 and 58. The handles 11 and 12 also include partly closed sides 81 and 82. Each of the partly closed sides includes a vertical wall, such as vertical wall 83 of handle 12 (shown in FIG. 4) or vertical wall 17 shown in FIG. 1. These vertical walls extend between the upper and lower sides of the handles, such as upper and lower sides 13 and 14 of handle 12. The vertical walls include a tool stop and tool keeper, such as stop and keeper 84 shown in FIG. 4. The tool stop and keeper 84 is not connected to the upper and lower sides 13 and 14, but rather extends from an end of vertical wall 83. Where the tool stop and keeper 84 adjoins to the remainder of the vertical wall 83, radiused comers are cut out in order to avoid stress spikes which would otherwise lead to a fatigue fracture over repeated uses of the tools. This is so because the tools, as they are opened, cause a slight deflection of the tool stop 84. In this way, the tool stop provides a frictional resistance to pivotal movement of the individual tools. Handle 11 includes a similar tool stop.

The vertical wall 83 also includes a plier opening 86 defined by a lower face strip 87 and an upper face strip 88. The lower face strip 87 includes a straight section 87a and a tapered section 87b. Likewise, the upper strip 88 includes a straight section 88a and a tapered section 88b. Together, the straight sections 87a and 88a define a straight portion of the opening 86, while the tapered portions 87b and 88b of the strips define a tapered portion of the opening 86. At the end of the tapered opening, a guide tab 89 is attached to the vertical wall 83 and limits the travel of the plier jaw into the opening 86 to prevent the plier jaw from contacting the tools inside the handle.

At the interface between the upper wall 14 and the vertical wall 83, the edge 91 therebetween is rounded, preferably with a radius of between about 5/64 and 7/64 of an inch, most preferably 3/32 of an inch. Likewise, the lower edge 92 has a similar radius, as do the corresponding edges on handle 11.

FIG. 4A shows a sectional view of plier handle 12 (with the individual tools removed for clarity). The channel-shaped handle 12 has an open side 56 and partly closed side comprising the vertical wall 83 (which includes the unshown opening for receiving the plier half). The individual tools open by moving in the direction of direction arrow 57, while the pliers open from the opposite side in the direction of direction arrow 58. Thus, the individual tools and the pliers open from opposite sides of the handle 12. Handle 11 is similarly constructed.

To operate the folding multi-tool to use the pliers, one starts with the folding multi-tool 10 in the configuration shown in FIG. 1 (a closed, compact configuration). The handles are then spread apart, with the pliers acting as a pivot point to achieve the slightly opened configuration of FIG. 5. The plier handles 11 and 12 are moved further in the direction of direction arrows 96 and 97 (away from one another) to obtain the moderately opened configuration of FIG. 6. The handles are moved further in the direction of direction arrows 96 and 97 to achieve the substantially opened, but not quite fully opened, configuration of FIG. 7. The handles are brought even more towards each other in the direction of direction arrows 96 and 97 to achieve the fully opened, extended configuration shown in FIG. 4.

This construction has numerous advantages. For example, the individual tools can be deployed without opening the entire multi-tool. Also, these individual tools can be easily and quickly deployed. Moreover, with the multi-tool in the opened, extended configuration shown in FIG. 4, the handles 11 and 12 are quite comfortable owing to the fact that the open side containing the individual tools), thereby providing a more even distribution of the gripping force over the user's hand. Also, the use of the rounded edges (e.g., 91, 92) makes for a more comfortable grip as well. This more comfortable grip allows greater gripping force to be applied comfortably to the handles, making the pliers more useful as a useful working tool. This construction also allows the multi-tool to be rather compact when using the pliers, while still providing excellent comfort. It also has the advantage that the pliers are rather strong and stable, enabling the pliers to do substantial work. Another advantage of this construction is that the construction of the multi-tool is an elegantly simple solution to the problem of providing comfortable hand grips for the pliers, making the multi-tool durable and easily constructed. Also, the eccentric tangs of the pliers engaging the plier stops eccentrically allow the multi-tool to be easily opened and help to stabilize the pliers once in the extended, open configuration.

While the invention has been disclosed in a preferred form, it will be apparent to those skilled in the art that many modifications, additions, and deletions may be made therein without departing from the spirit and scope of the invention as set forth in the following claims.