Pump dispenser with sealing plunger

Details Pump dispenser with sealing plunger Pump dispenser with sealing plunger

1979-12-26

1982-10-26

Freeh, William L.

Pumps

Expansible chamber type

Valved piston

222321, 222383, F04B 2104, F04B 3910, G01F 1102

Patent

active

043559620

ABSTRACT:
The hand-operated pump has a piston which is reciprocated within the hollow pump body by a plunger which itself is reciprocated through an opening in a collar at one end of the pump body. When the plunger is in a fully extended condition at one end of a stroke, a direct seal is obtained between an annular projection on the plunger and an annular groove on the collar which receives said projection. Thus, leakage is prevented along the interface between the plunger and the collar through the opening during shipment or accidental inversion of the pump at other times.

REFERENCES:
patent: 4162746 (1979-07-01), Anderson
patent: 4234127 (1980-11-01), Tada
patent: 4262823 (1981-04-01), Mondon

Affiliated with

Also associated with

Rating

Pump dispenser with sealing plunger does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Pump dispenser with sealing plunger, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Pump dispenser with sealing plunger will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-946078