Piston assembly for trigger sprayer

Details Piston assembly for trigger sprayer Piston assembly for trigger sprayer

1997-01-29

1999-01-26

Walczak, David J.

Dispensing

With discharge assistant

With material supply container and discharge assistant with...

222385, 2223217, 2223219, B67D 540

Patent

active

058629505

ABSTRACT:
The trigger sprayer comprises a trigger sprayer body having a cylinder therein, a trigger movably mounted to the trigger sprayer body, and the improvement of a piston assembly including a piston body having an unobstructed annular space for receiving an O-ring and an O-ring mounted in the unobstructed annular space for sealing between the piston body and an inner wall in the cylinder in the trigger sprayer body.
Preferably, the piston body is formed from two parts which are pressed together to form the unobstructed annular space between the parts for receiving the O-ring.

REFERENCES:
patent: 2547109 (1951-04-01), Bacheller
patent: 4105146 (1978-08-01), Broillard
patent: 4489861 (1984-12-01), Saito et al.

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