Trigger sprayer

Details Trigger sprayer Trigger sprayer

1977-09-09

1979-05-22

Knowles, Allen N.

Dispensing

Resilient wall

Supply container delivering to receiving chamber

222213, 222214, 222383, B65D 3700

Patent

active

041554876

ABSTRACT:
In one trigger operated dispenser pump a variable volume pump chamber is formed by a flexible bulb having a flange on its upper end which serves as a gasket and carries depending flaps which form inlet and outlet check valves for the chamber. In two other arrangements, the pump chamber is formed by a piston and cylinder and the valve element is a separate member surrounding a cavity open to the pump chamber. A novel vent valve permits replacement air into the container on which the pump is used.

REFERENCES:
patent: 3486663 (1969-12-01), Humphrey
patent: 3561648 (1971-02-01), Humphrey
patent: 3726442 (1973-04-01), Davidson et al.
patent: 3986644 (1976-10-01), Grogan et al.
patent: 3995774 (1976-12-01), Cooprider et al.

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