Air vent check valve

Details Air vent check valve Air vent check valve

1979-05-31

1981-02-10

Spar, Robert J.

Dispensing

With discharge assistant

With movable nozzle interconnected therewith

222383, 222481, B05B 1100

Patent

active

042496764

ABSTRACT:
An improved, plunger-type hand pump for liquids in flexible containers is provided which includes a check valve for preventing outward flow of liquid through the air intake passageway of the pump, as a consequence of simultaneous depression of the pump plunger and incidental deformation of the flexible container walls. The pump includes a skirted head mounted atop the plunger and an upstanding, cooperating, skirt-receiving collar, and an annular vent opening forming a part of the air intake passageway of the pump is presented between the skirt and collar. The check valve preferably comprises a flexible annular washer mounted on the pump head for reciprocation therewith, and the outer periphery of the washer slidingly engages the collar to seal the container opening against outflow of liquid.

REFERENCES:
patent: 4057176 (1977-11-01), Horvath
patent: 4065038 (1977-12-01), Magers et al.
patent: 4201317 (1980-05-01), Aleff

Affiliated with

Also associated with

Rating

Air vent check valve does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Air vent check valve, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Air vent check valve will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1662095