Vacuum limiter for pump

Details Vacuum limiter for pump Vacuum limiter for pump

1993-09-08

1995-12-26

Bertsch, Richard A.

Pumps

Expansible chamber type

Having separate noncyclic valve

417441, 417 53, 137114, 137907, F04B 4100

Patent

active

054782163

ABSTRACT:
A hand-held vacuum pump with an attached vacuum limiter valve is disclosed. The pump includes a cylinder coupled with a handle, a piston in the cylinder coupled with another handle, along with a suitable valving assembly for allowing a vacuum to be drawn at an inlet of the pump. More particularly, there is also disclosed a vacuum limiter which can be attached to or form an integral part of the pump. The vacuum limiter includes a valve which is attached to the cylinder outlet port and which is adjustable for allowing the limit vacuum to be set.

REFERENCES:
patent: 3612722 (1971-10-01), Neward
patent: 4775302 (1988-10-01), Neward
patent: 4806084 (1989-02-01), Neward
patent: 4954054 (1990-09-01), Neward
patent: 4979883 (1990-12-01), Neward
patent: 4979883 (1990-12-01), Neward
patent: 5112203 (1992-05-01), Neward
patent: 5277557 (1994-01-01), Cooper

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