Positive-Sealing Bottle Cap

The present invention relates to an improved bottle cap device and more particularly to a bottle cap that is formed having a positive sealing arrangement for use with bottles that store gaseous liquid such as soda water and like carbonated beverages. The bottle cap device includes a cap body and a sealing cover or lid that is formed having a depending semi-spherical sealing member that engages a gasket mounted within the cap body each time the cover is locked closed.

Many types of cap devices are presently in use and they vary in configuration and how they are capped on a bottle. This is generally due to the configuration of the bottle in which the soda is stored. Some known soda-bottle caps are just simple plastic snap-on units or caps having internal threads that match particular bottle arrangements and these caps have no particular sealing arrangement. Both of the types of caps do not provide proper sealing to prevent gases within the soda water from slowly leaking out. When the gas is allowed to escape from the bottled soda it is no longer desirable since it becomes what is referred to as "flat".

Therefore, such bottle caps generally have inherently poor sealing qualities. This is particularly true with bottle caps that are mounted to the larger 2 liter soda bottles commonly sold in markets, liquor stores, drug stores and like places. These bottles are often provided with soft aluminum caps that are fixedly sealed to the thread outlet neck portion of the bottle. This type of cap is removed from a bottle by rotating the cap so as to force it to break loose from an integrally formed holding ring member. Many times, the soft metal caps are distorted by the force required to remove them, causing the cap to lose its circular shape which then prevents it from being properly sealed, and allows the gases to leak out of the bottle.

Accordingly, there is a need for a sealing cap that is simple to operate and yet provides a very positive seal when remounted to me threaded neck portion of a 2 liter plastic bottle or other container.

The present invention comprises a novel bottle cap or cover member that is hingedly mounted to a cap body that is internally threaded so as to be readily secured to any compatible threaded neck portion of a soda bottle. The capping lid or cover is formed having an inverted semi-spherical wall structure that is adapted to engage a gasket member in a tight sealing manner which has not been provided heretofore. The gasket is formed to include an air vent or tube that is integrally formed therewith so as to extend downwardly within the neck of the bottle. A hinge device is provided between the snap lid or cover and the cap body, wherein a hinge is formed having a pivot pin that includes a latch arrangement which allows the lid to be held in an open position with respect to the cap body as the soda or other gaseous liquid is poured from the bottle.

Accordingly, it is an object of the present invention to provide an improved bottle cap that is particularly designed to be used with large plastic-type soda bottles and more particularly with 2 liter bottles that are provided with a screw cap. These bottles are commonly found in most stores today as they are used by most producers of various gaseous drinks from carbonated water to soda pop.

Another object of the invention is to provide an improved bottle cap that includes a unique sealing arrangement wherein the cover or lid is hingedly mounted to the cap body which is internally threaded so as to be screwed to the existing threads on the neck portion of the typical 2 liter soda bottle. The hinged lid is defined by an inverted dome-like wall structure so as to establish a positive sealing engagement with the inner annular sealing lip of the gasket member and the inner circular edge of the mouth of the bottle. This arrangement will automatically cause a positive aligned sealing engagement between the gasket and the inverted dome wall structure and the bottle mouth.

Still another object of the present invention is to provide a sealable and lockable lid having the above characteristics, whereby a positive sealing arrangement is provided to substantially extend the shelf life of stored bottled gaseous fluids well beyond that possible with any of the simple cap devices now employed for the same purpose.

A further object of the present invention is to provide a device of this character having few moving parts which makes it easy to use.

Still a further object of the invention is to provide a bottle cap device of this character that is relatively inexpensive to manufacture and is simple but rugged in construction.

The characteristics and advantages of the invention are further sufficiently referred to in connection with the accompanying drawings, which represent one embodiment. After considering this example, skilled persons will understand that variations may be made without departing from the principles disclosed; and we contemplate the employment of any structures, arrangements or modes of operation that are properly within the scope of the appended claims.

With the above and related objected in view, the invention consists in the details of construction and combination of parts, as will be more fully understood from the following description when read in conjunction with the accompanying drawings and numbered parts, in which:

FIG. 1 is a front elevational view of the upper portion of a typical soda bottle on which there is illustrated the present invention that defines a bottle-sealing device having a hinged sealing lid or cover member which is shown in a secured open position on the cap body;

FIG. 2 is a perspective view of the sealing lid or cover showing it removed from the cap body member;

FIG. 3 is a top plan view of the bottle-sealing cap in a closed and locked position;

FIG. 4 is a cross-sectional view taken substantially along line 4--4 of FIG. 3 showing the cap body screwed to the threaded neck of the bottle;

FIG. 5 is a top plan view of the gasket;

FIG. 6 is a cross-sectional view taken substantially along line 6--6 of FIG. 5 showing the gasket separated from the cap body member; and

FIG. 7 is an enlarged cross-sectional view of the hinge connection of the sealing cap.

Referring more particularly to FIG. 1, there is shown an upper portion of a typical plastic soda bottle or other like bottle, generally indicated at 10, that is formed having a threaded neck portion 12. The soda bottle is the commonly used 2 liter size that has become a popular bottle size now available at most super markets and convenience stores. As previously mentioned, this type of bottle is provided with a sealed soft metal cap (not shown) that is threadably secured to threads 11 that are formed in the upper portion of neck 12 of the bottle 10. In the cross-section of FIG. 4, the neck portion 12 is shown with an annular outer wall member 14 that defines an opening or mouth 13 which includes an upper planer surface 13a, an inner circular edge 13b and an annular recess 15 that provides a shoulder 16. Just below shoulder 14 are receiving threads 11 formed in neck 12.

Threadably mounted to threaded neck portion 12 is the present invention which is defined as a bottle cap device, generally designated at 20. Bottle cap device 20 is formed with a cap body 22, as seen in FIGS. 1, 4, and 6 which is defined by a cylindrical wall 24 having an inner surface 26 formed with internal threads 28. These threads are arranged to be threadably compatible with those of the bottle 10. The cap body defines an inwardly projecting shoulder 29 which is arranged to extend over the upper surface 13a of the mouth of the bottle and compress a gasket to be described against the surface 13a for sealing purposes. The outer surface of wall 24 of the cap is formed with a cap-locking means that is defined by an outwardly projecting hook 30. Also formed in wall 24 is a hinge means which is oppositely disposed to that of hook 30. The hinge means, designated generally at 32, comprises a pair of upper hinge arm members 34 that are spaced apart so as to accommodate a lower hinge arm member 36 which is positioned therebetween. Rotatably mounted between the upper and lower hinge arm members 34 and 36 is a pivot pin 38 which is formed as an integral part of a hinged sealing lid or cover 40.

Cover lid 40 includes a top wall 42 which is formed having an annular V-shaped channel 43 defined by an outer curved wall 41 and an inner vertical wall 47, whereby curved wall 41 provides a convex semi-spherical gasket-engaging surface 44 which has the appearance of a section of an inverted dome member. Channel 43 further defines a central hub member 45 as part of top wall 42. An annular lip member 46 establishes the outer peripheral edge of cap 40 and covers the peripheral edge of body 22. A pair of leg members 48 are integrally connected to cover or lid 40 to which pivot pin 38 is fixedly mounted. It should be noted that pivot pin 38 is provided with a latch-positioning means, designated generally at 50, which comprises an elongated rib member 52 that is formed longitudinally along the upper side of pin 38 when sealing cap cover 40 is in a closed position, as seen in FIGS. 3, 4 and 7 Latch-positioning means 50 also includes a small projecting nipple member 54 (See FIG. 7) that is formed within the curved surface 65 of the lower arm 36. Cover 40 is thus rotatably mounted between arm members 34 and 36 so as to rotate therein between an open and closed sealed position, as illustrated in FIG. 4. That is, when the cover 40 is in a closed and locked position, as seen in FIGS. 4 and 7, rib member 52 is facing upwardly and is free to be rotated to an open position when cover lid 40 is unlocked To pour the fluid from the bottle, the cover or lid 40 is rotated rearwardly to the position as shown in FIG. 1 and is then latched in an open position as rib 52 overrides nipple 54 in lower arm member 36.

When in a sealed closed position, cover 40 and the semi-spherical sealing surface 44 is forced against a sealing means, designated at 66, which comprises a circular gasket 70 having an annular ring member 72 positioned between the shoulder 29 of the cap 40 and the upper surface 13a of the neck of the bottle as illustrated. The gasket includes an outer annular flange member 73 that is adapted to be positioned within recess 15, and an inner annular, inclined, sealing lip member 74 that is arranged in such a manner as to provide a very positive and stable seal when it is engaged with the convex semi-spherical gasket-engaging wall 44, thereby preventing gases in the soda water 75 from escaping through the neck of the bottle. The engaging lip member 74 of the gasket is compressed between the inner circular edge 13a of the mouth of the bottle and the curved wall 44 of the inverted dome member to provide a unique and positive seal. The configuration of the semi-spherical wall structure (44) of the cover lid 40, together with the overlapping of the inclined annular lip member 74, provides a self-adjusting sealing means for accommodating a misalignment between the upper surface of the bottle neck and the cap 40, not found in any known cap device. The self adjusting feature results, at least in part, because the surface of the semi-spherical wall 44 of the inverted dome member which engages the gasket lip is circular whether or not the plane of the top of lid 40 is parallel to the plane of the bottle mouth.

Integrally formed within the configuration of the circular gasket 70 is breathing tube 76 which is more specifically formed within the inclined lip member 74. Breathing tube 76 is formed having an inlet opening 77 and an outlet opening 78 which allow air to pass into the internal chamber 79 of the bottle, whereby the fluid stored therein will flow freely from bottle 10.

Accordingly, when the cover cap 40 is opened so as to remove soda 75 from the bottle, a locking means must be released This locking means comprises hook 30 that projects from body member 22 and a locking tongue 80 affixed to cap cover 40 by means of a pair of front leg members 82, as illustrated in FIGS. 1, 2, 3 and 4. As is illustrated in FIG. 4, the locking tongue 80 extends or snaps over the hook 30 and engages a lower shoulder 30a thereof in the locked and sealed position.

In order to prevent the breather tube from being misaligned from its normal position at right angles to the hinge means, a pair of oppositely disposed notches 83 are formed in depending flange 73 of gasket 70. These notches are aligned to receive respective tab members 84 which are formed on the inner surface 26 of cap body 22 and are located in direct longitudinal alignment with the cap hinge means and locking means, as seen in the top plan view of FIG. 3.

It may be thus seen that the objects of the present invention set forth herein, as those made apparent from the foregoing description are efficiently attained. While preferred embodiments of the invention have been set forth for purpose of disclosure, modifications of the disclosed embodiments of the invention as well as other embodiments thereof may occur to those skilled in the art. Accordingly, the appended claims are intended to cover all embodiments which do not depart from the spirit and scope of the invention.