Risdon Corporation

Glenn W McGarvey

Owen F Van Brocklin

An atomizing pump for dispensing liquids from a container which has a low profile and is non-throttling. The pump comprises a body, a spring biased piston, a lower valve openable and closable by both pressure in the pump body and by frictional interengagement with the pump piston with an extending upper end of the lower valve, and an upper valve that frictionally and sealingly fits in a lower chamber in the piston, but which can be moved against a spring force and the friction force when pressure in the pump reaches a critical limit, so that the upper valve moves into a larger upper chamber so that liquid can escape from the pump body. The upper valve preferably has an extending stem that contacts the extending upper end of the lower valve during the terminal portion of a downward stroke of the piston and an initial portion of an upward stroke of the piston so that the upper valve can be held open. The stem has two opposing tabs on its lower that are deformable to spread apart and retain the upper valve in the piston.

Low profile pump

The assembly comprises a sealing collar and a mounting cup which is slidable through a path of movement over a container flange to an assembled position with the cavity retaining the sealing collar therein. The skirt has an inner sidewall that has a circumferentially extending groove formed therein for snappingly engaging the collar perimeter when the collar is inserted axially into the cavity, whereby the collar and pump body are lockingly retained in combination with the cup by the cooperation of the groove with the collar perimeter.

Growing community of inventors

Watertown, CT, United States of America

Glenn W McGarvey