Bottles and jars – Closures – Combined or convertible
Patent
1995-08-23
1996-10-15
Shoag, Allan N.
Bottles and jars
Closures
Combined or convertible
220231, B65D 5116, B65D 5500
Patent
active
055645810
ABSTRACT:
A vacuum canister comprises a container section and a cover with an integrally formed air suction device. The air suction device includes a sleeve pipe, an eduction membrane and a piston tube. One end of the sleeve pipe has an anchor plate and a grating plate. A flexible eduction membrane is located between the anchor plate and the grating plate, and fastened to the anchor plate. The anchor plate has a flow hole therethrough and the grating plate has an air hole therethrough. The membrane is movable between a first position in which the membrane allows airflow through the air hole and a second position in which the membrane blocks airflow through the air hole. The piston tube is received by, and moves within, the sleeve pipe. One end of the piston tube has a front retaining edge, a rear retaining edge, and a flexible O-ring movable therebetween. The front and rear retaining ends are separated by an interval of space. The O-ring has a thickness smaller than the interval of space. The piston tube also has a relief hole formed therethrough along a portion of the interval of space. The O-ring moves within the interval of space between a first position in which the O-ring blocks airflow through the relief hole and a second position in which the O-ring does not block airflow the relief hole. The piston tube further has an overflow hole near its other end for ultimately expelling air from the canister.
REFERENCES:
patent: 347095 (1886-08-01), Doherty
patent: 4278114 (1981-07-01), Ruberg
patent: 4524877 (1985-06-01), Saxby et al.
patent: 4768665 (1988-09-01), Ballas
patent: 4889250 (1987-12-01), Beyer
patent: 5294010 (1994-03-01), Tschida
patent: 5347918 (1994-09-01), Chen
patent: 5405038 (1995-04-01), Chuang
patent: 5449079 (1995-09-01), Yang
Lin Pi-Chu
Newhouse Nathan
Shoag Allan N.
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