Precompression valve for trigger sprayer

Details Precompression valve for trigger sprayer Precompression valve for trigger sprayer

1995-11-20

1998-03-24

Kaufman, Joseph

Dispensing

With discharge assistant

With biasing means for discharge assistant and/or its casing

222380, 2223833, 239333, G01F 1136

Patent

active

057303355

ABSTRACT:
The trigger sprayer comprises: a body having a cylinder therein; a liquid inlet to the cylinder; an outlet waterway in communication with the cylinder; a piston having an inner end and an outer end received in the cylinder; a fluid path including at least a part of the cylinder and the waterway and extending between the piston and an outlet orifice; a trigger coupled to the body and acting on the outer end of the piston; a precompression valve assembly in the fluid path between the piston and the outlet orifice which is operable to allow liquid in a first part of the fluid path to reach the outlet orifice only after a predetermined pressure is established in the cylinder and to stop liquid from reaching the outlet orifice when the pressure in the cylinder falls below the predetermined pressure and which includes a valve seat in the fluid path, a spring valve element and retaining structure for retaining the spring valve element against the valve seat; biasing structure for biasing the piston away from the precompression valve assembly; and, the piston having, at the inner end thereof, a protrusion which extends axially, outwardly from the inner end a sufficient distance to engage and deform slightly, at least upon the initial movements of the piston, the spring valve element upon squeezing the trigger to a fully squeezed in position.

REFERENCES:
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patent: 4046292 (1977-09-01), Corsette
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patent: 4480768 (1984-11-01), Martin
patent: 4606480 (1986-08-01), Gazulla
patent: 4618077 (1986-10-01), Corsette
patent: 4669664 (1987-06-01), Garneau
patent: 4728009 (1988-03-01), Schmidt
patent: 4872596 (1989-10-01), Corsette
patent: 4958754 (1990-09-01), Dennis
patent: 5299717 (1994-04-01), Geier
patent: 5318206 (1994-06-01), Maas et al.
patent: 5467900 (1995-11-01), Maas et al.

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