초록 ▼

The present invention is a pressure equalizing and foam eliminating cap for a container. Pressure equalization and foam elimination is accomplished by designing the cap so that it can be rotated between a fully closed position, a gas venting position and a fully open position. This is accomplished i

The present invention is a pressure equalizing and foam eliminating cap for a container. Pressure equalization and foam elimination is accomplished by designing the cap so that it can be rotated between a fully closed position, a gas venting position and a fully open position. This is accomplished in several ways. A first embodiment includes a spring biased, gas separation membrane between the cap and the mouth of the container. A second embodiment includes a finely, transversely perforated, annular plug on the underside of the cap and a seal between the plug and the interior of the neck. Alternatively, in this embodiment, the perforations may be larger and protected by a gas separation membrane. A third embodiment is similar to the second but incorporates two seals, one above and one below the perforations. In this embodiment also, the perforations may be larger and protected by a gas separation membrane. A fourth embodiment has two annular seals, the outer one being larger and having transverse perforations, depending from the underside of the cap. A fifth embodiment is similar to the second except that the plug is not perforated and the seal has fine, outer, axial grooves or scores. A sixth embodiment has two threaded caps which screw onto each other. The inner cap has micro perforations or a section of gas separating membrane in its top. A seventh embodiment is similar to the sixth embodiment except that the outer cap is a flip cap which may be hingedly attached to the inner cap.

대표청구항 ▼

[ What is claimed is:] [1.] A pressure equalizing and foam eliminating cap for a container for gas/liquid mixtures having a mouth comprising:a. cap means for being mated to and detached from said mouth;b. advancing means, incorporated in said cap means, for allowing said cap means to be repatedly op

[ What is claimed is:] [1.] A pressure equalizing and foam eliminating cap for a container for gas/liquid mixtures having a mouth comprising:a. cap means for being mated to and detached from said mouth;b. advancing means, incorporated in said cap means, for allowing said cap means to be repatedly opened from a fully closed position to a gas venting position to a fully open position and closed from said filly open position to said gas venting position to said fully closed position;c. seal means mounted inside said cap means for sealing said cap means to said mouth when said cap means is in said fully closed position; andd. pressure release means, incorporated in said cap means, for allowing gas at pressures greater than ambient and not liquid to vent from said container when said cap means is in said gas venting position; reby said container can be in one of the three following conditions: a) completely sealed so that no gas or liquid can escape, when said cap is in said fully closed position; b) slightly opened so that excess gas only and not liquid can be vented from said container, when said cap is in said gas venting position; and c) fully opened so that liquid can be poured from said container.