Spray pump assembly

Details Spray pump assembly Spray pump assembly

1976-06-01

1977-09-27

Freeh, William L.

Pumps

Expansible chamber type

Pressure responsive distributor opened responsive to pumping...

222385, 417553, F04B 2104

Patent

active

040508609

ABSTRACT:
A finger-operated spray pump assembly adapted to maintain a seal against leakage under substantially all conditions normally encountered by the pump. The assembly includes a compression chamber, a piston slidable in the housing, a grommet for holding the piston in the compression chamber, a stem slidable in the piston, and a seal member abutting the piston. The lower end of the valve stem contacts the seal member to open the seal slightly before the piston starts its downstroke. A closure member for the container to be used is permanently attached to the spray pump.

REFERENCES:
patent: 3216624 (1965-11-01), Corsette
patent: 3724726 (1973-04-01), Susuki et al.
patent: 3949910 (1976-04-01), Focht

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