All plastic trigger pump

Details All plastic trigger pump All plastic trigger pump

1995-11-13

1999-11-16

Kaufman, Joseph A.

Dispensing

With discharge assistant

With biasing means for discharge assistant and/or its casing

222382, 2223831, B67D 540

Patent

active

059841494

ABSTRACT:
A trigger pump dispenser is made entirely from thermoplastic resin materials. It has a trigger (17) pivotally attached to the body (13) at its top end. The trigger is attached by a living hinge to a piston 16 movable within a pump cylinder (40), and is biased by a spring (18) to the retracted position shown. The spring is generally L-shaped and anchored to the body by its bottom leg so as to straddle the pump cylinder. A unitary valve member (15) located at the back of the pump cylinder provides one-way valves both for product dispensing and for product recharging into the pump chamber.

REFERENCES:
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patent: 4191313 (1980-03-01), Blake et al.
patent: 4227650 (1980-10-01), McKinney
patent: 4489861 (1984-12-01), Saito et al.
patent: 4618077 (1986-10-01), Corsette
patent: 4872596 (1989-10-01), Corsette
patent: 4958754 (1990-09-01), Dennis
patent: 5228602 (1993-07-01), Maas et al.
patent: 5335858 (1994-08-01), Dunning et al.
patent: 5423460 (1995-06-01), Thomann
Search Report of British Application No. 9422826.9.

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