Vacuum container

Details Vacuum container Vacuum container

1993-10-21

1995-02-21

Shoap, Allan N.

Receptacles

Closures

Combined or convertible

220231, 220367, 220420, 220425, 215228, 215270, 215311, 141 65, 137522, 137854, 417553, B65B 3104

Patent

active

053908090

ABSTRACT:
This invention relates to a vacuum container and in particular to one including an inner container, an outer container receiving said inner container, a lid provided with a packing formed with an outer annular groove for receiving an upper rim of said outer container and an inner annular groove for receiving an upper rim of said inner container, a check valve mounted on a central portion of said lid, a control valve composed of two one-way valves, and a vacuum extractor including a sleeve and a seat engaged with the lower end of said sleeve, said sleeve being a tubular member in which is inserted a piston, said piston having a lower end formed with an upper flange and a lower flange between which is fitted a leak-proof gasket, said upper flange being formed with a pair of exhaust openings.

REFERENCES:
patent: 3454182 (1969-07-01), Morton
patent: 4249583 (1981-02-01), Lundbladh
patent: 4278114 (1981-07-01), Ruberg
patent: 4401224 (1983-08-01), Alonso
patent: 4865014 (1989-09-01), Nelson
patent: 4975028 (1990-12-01), Schultz

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