Spray pump

Details Spray pump Spray pump

1990-11-09

1991-06-25

Smith, Leonard E.

Dispensing

With discharge assistant

With movable nozzle interconnected therewith

417552, 222385, G01F 1136

Patent

active

050259580

ABSTRACT:
The pump comprises: a main cylinder (24); a main plunger (12) urged by a first spring (62) and extended by a hollow stem (10) and having a valve seat therein; a secondary cylinder (52) comprised within the main cylinder (24); a secondary plunger (64) urged by a second spring (70) having an upper extension (66) and being provided with a cavity (72) which is closed in the proximity of the end (68) engageable with the valve seat; while it is open at the lower end thereof, maintaining communication with the space (54).

REFERENCES:
patent: 3500761 (1970-03-01), Clevenger et al.
patent: 4082222 (1978-04-01), Boris
patent: 4189064 (1980-02-01), O'Neil et al.
patent: 4941595 (1990-07-01), Montaner et al.

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