Pump apparatus for evacuating containers

Details Pump apparatus for evacuating containers Pump apparatus for evacuating containers

1989-01-13

1990-12-04

Smith, Leonard E.

Pumps

Expansible chamber type

Selectively usable plural inlet or outlet distributors for...

417503, 417511, 417553, 137843, F04B 3710, F04B 3910

Patent

active

049750283

ABSTRACT:
Apparatus for evacuating a rigid container using a two-stroke reciprocating-piston pump having an air evacuating vacuum cup which is to be applied to the container lid. The pump cylinder houses a reciprocating piston-check-valve. An adhesive-tape check valve is applied to a container access opening in the lid; and the vacuum cup is seated over the adhesive-tape check valve to evacuate the rigid container. An alternative embodiment employing a vacuum probe having an in-line check valve is inserted into an otherwise plugged opening in the pump cylinder wall to evacuate a deformable container. In the second embodiment, the adhesive-type check valve is eliminated. The two check valves employed in each embodiment alternate open and closed states during piston reciprocation.

REFERENCES:
patent: 1051738 (1913-01-01), Kavanagh
patent: 3224378 (1965-12-01), Graham
patent: 3313444 (1967-04-01), Katell
patent: 3337091 (1967-08-01), Bartels
patent: 3994032 (1976-11-01), Spickofsky
patent: 4278114 (1981-07-01), Ruberg
patent: 4575990 (1986-03-01), von Bismarck
patent: 4583925 (1986-04-01), Hawkins

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