Pressure pump for dispensing liquid

Details Pressure pump for dispensing liquid Pressure pump for dispensing liquid

1995-04-07

1997-09-23

Derakshani, Philippe

Dispensing

With discharge assistant

Fluid pressure

222402, B65D 8300

Patent

active

056695322

ABSTRACT:
A non-round pressure sprayer unit for dispensing liquids from a closed container including a pressure pump, tube/hose connection, and applicator wand. The pressure pump mechanism further includes a pump housing sealingly insertable in the pressure sprayer bottle, a plunger for reciprocating within the housing with an upstroke and a downstroke, and a pump piston at the lower end of the plunger. The pump piston includes a bottom closure for closing the lower end of the pump housing when the piston is lowered on the downstroke and capable of opening the lower end of the pump housing when the piston is raised in the upstroke. A pump seal seals the piston and the inner wall of the pump housing when the piston is on its downstroke but becomes unsealed on the upstroke of the piston.

REFERENCES:
patent: 1396494 (1921-11-01), Wright
patent: 1863754 (1932-06-01), Lissauer et al.
patent: 2985359 (1961-05-01), Hanje
patent: 3251514 (1966-05-01), Speicher
patent: 3367540 (1968-02-01), Lehmann
patent: 5299917 (1994-04-01), Schultz

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