Precompression pump sprayer

Details Precompression pump sprayer Precompression pump sprayer

1996-10-24

1997-06-17

Kashnikow, Andres

Dispensing

With discharge assistant

With movable nozzle interconnected therewith

2223219, B67D 542

Patent

active

056389965

ABSTRACT:
A precompression pump sprayer comprises a hollow piston and a plunger rod having a discharge passage and a lower enlarged end forming a discharge valve seat, the rod extending through the piston for reciprocation between an inactive position and an end-of-stroke position, the piston engaging the valve seat in a discharge closed position, a primary spring biasing the plunger rod toward its inactive position, and a secondary spring biasing the piston into engagement with the discharge valve seat, the valve seat being of conical or curved shape, and the piston having a shoulder defining a discharge valve for solely contacting the valve seat along a thin circular line without sliding for quickly and cleanly valving the discharge passage open and closed during plunger actuation.

REFERENCES:
patent: 4051983 (1977-10-01), Anderson
patent: 4228931 (1980-10-01), Ruscitti et al.
patent: 4245967 (1981-01-01), Busselet
patent: 4274560 (1981-06-01), Cater
patent: 4694976 (1987-09-01), Schuetz
patent: 4856677 (1989-08-01), Brunet et al.
patent: 4941595 (1990-07-01), Montaner et al.
patent: 4960230 (1990-10-01), Marelli
patent: 5038965 (1991-08-01), Cater
patent: 5234135 (1993-08-01), LaFosse et al.
patent: 5482188 (1996-01-01), Lina

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