Plastic spring assembly for trigger sprayer

Details Plastic spring assembly for trigger sprayer Plastic spring assembly for trigger sprayer

1993-07-14

1994-08-30

Kashnikow:, Andres

Dispensing

With discharge assistant

With biasing means for discharge assistant and/or its casing

222383, 239333, B67D 500

Patent

active

053419650

ABSTRACT:
The trigger operated pumping mechanism for a fluid dispensing device comprises a body extending rearwardly from a discharge end of the fluid dispensing device toward a hand gripping formation of the fluid dispensing device. The body has a hollow cylinder therein extending to a rear wall. A piston is received in the cylinder. A trigger is movably mounted to the body, has a front side and a back side, and is coupled to the piston. A biasing mechanism for biasing the trigger away from the body to bias the piston coupled to the trigger out of the cylinder is positioned between the body and the trigger. The biasing mechanism includes non-metal, non-coiled, elongate spring structure having opposite ends, extending rearwardly from the trigger toward the hand gripping formation, having one end positioned adjacent to and acting against the trigger and having another end positioned rearwardly of the trigger adjacent the body at a location which is closer to the rear wall of the cylinder than to the trigger.

REFERENCES:
patent: 3768734 (1973-10-01), Anderson, Jr. et al.
patent: 4153203 (1979-05-01), Tada
patent: 4191313 (1980-03-01), Blake et al.
patent: 4222501 (1980-09-01), Hammett et al.
patent: 4241853 (1980-12-01), Pauls et al.
patent: 4593607 (1986-06-01), Bennett
patent: 4624413 (1986-11-01), Corsette
patent: 4815663 (1989-03-01), Tada
patent: 4898307 (1990-02-01), Tiramani
patent: 4915263 (1990-04-01), Corba
patent: 5211315 (1993-05-01), Geier

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