Evacuation pump system with check valves for both rigid and flex

Details Evacuation pump system with check valves for both rigid and flex Evacuation pump system with check valves for both rigid and flex

1993-02-16

1994-04-05

Bertsch, Richard A.

Pumps

Changeable by assembly or disassembly

417442, 417553, 417503, 53510, 53512, 53 88, F04B 3910, B65B 3100

Patent

active

052999173

ABSTRACT:
An improved evacuation pump system with dual inlet check valves uniquely designed to evacuate both lidded rigid containers and sealable flexible containers. A vacuum cup fixed to one end of a reciprocating piston pump attaches to the lid of rigid containers for their evacuation and a flexible probe connects to the pump for flexible container evacuation. To achieve this dual function two check valves mounted in the lower end of the pump are provided for the flexible container evacuation mode. One prevents discharge flow into the flexible probe and the other maintains suction in the cup to keep the pump attached to its supporting surface.

REFERENCES:
patent: 1466804 (1923-09-01), Orr
patent: 3220351 (1965-11-01), Kling
patent: 3941518 (1976-03-01), Eaton et al.
patent: 4583925 (1986-04-01), Hawkins
patent: 4745730 (1988-05-01), Bartle, Sr.
patent: 4975028 (1990-12-01), Schultz
patent: 5121590 (1992-06-01), Scanlan

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