Vacuum limiter for pump

Details Vacuum limiter for pump Vacuum limiter for pump

1989-09-27

1990-12-25

Hepperle, Stephen M.

Pumps

Expansible chamber type

Having separate noncyclic valve

137114, 137907, F04B 3714

Patent

active

049798839

ABSTRACT:
There is disclosed herein a small and compact vacuum pump which serves as a portable vacuum source. The pump basically includes a cylinder coupled with a handle, and 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 an assembly having a pair of valves one of which is adjustable for allowing the limit vacuum to be set. The adjustable valve is a metering check valve and the second valve is a holding check valve upstream of the first.

REFERENCES:
patent: 2217056 (1940-10-01), Johnson
patent: 3612722 (1971-10-01), Neward
patent: 4413644 (1983-11-01), Woodward
patent: 4502502 (1985-03-01), Krug
patent: 4565506 (1986-01-01), Williams
patent: 4758224 (1988-07-01), Siposs
patent: 4775302 (1988-10-01), Neward
patent: 4806084 (1989-02-01), Neward

Affiliated with

Also associated with

Rating

Vacuum limiter for pump does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Vacuum limiter for pump, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Vacuum limiter for pump will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1159989