Abstract Reduced gaseous pressure operated, liquid receptacle structure having an enclosure member and a bottom cover. The latter is provided with an interior sealing protuberance which seals against the inner wall of the enclosure member, such seal being increased upon the application of reduced pressure of the interior of the structure. A one-piece, fixed differential valve device is disposed in a vacuum port of the enclosure member to permit the passage of air therethrough, but not the passage of liquids such as blood. The port containing the valve device is tapered or otherwise configured such that the valve will not be drawn toward the reduced pressure source. The enclosure member is constructed to have ports at its base or top such that pin means and corresponding guide apertures in the mold structure forming the enclosure may be accommodated, so as to preserve uniform wall thickness in the enclosure member during the formation thereof.
Reduced-air-pressure operated liquid receptacle structure, including, in combination, a liquid receiving enclosure structure provided with a liquid receiving port and an elongate vacuum port, and differential valve means comprising a plastic, longitudinally perforate, elongate plug disposed within said vacuum port for preventing the passage of liquid therethrough but for allowing air to be evacuated from within said enclosure to pass therethrough, and wherein said vacuum port frictionally retentively engages said plug and is tapered outwardly, the outwardly tapered condition of said port preventing the movement of said plug toward an external vacuum producing source to be connected to said vacuum port.
Claim 2
Dependent Claim
101 words
Reduced-air-pressure operated liquid receptacle structure, including, in combination, a liquid receiving enclosure structure provided with a liquid receiving port and an elongate vacuum port, and differential valve means comprising a plastic, longitudinally perforate, elongate plug disposed within said vacuum port for preventing the passage of liquid therethrough but for allowing air to be evacuated from within said enclosure to pass therethrough, and wherein said vacuum port frictionally retentively engages said plug and is tapered outwardly, the outwardly tapered condition of said port preventing the movement of said plug toward an external vacuum producing source to be connected to said vacuum port.