Pump assembly for an atomizing piston pump

Details Pump assembly for an atomizing piston pump Pump assembly for an atomizing piston pump

1978-02-21

1979-04-03

Freeh, William L.

Pumps

Motor driven

Spring or weight motor

141117, 222321, 417445, 417545, F04B 1700

Patent

active

041474767

ABSTRACT:
A pump assembly for an atomizing piston pump comprises a first piston slidably located in a first cylinder to define a first variable volume space and a second piston of smaller piston area than the first slidably located in a second cylinder to define a second variable volume space. The two volume spaces are in communication and there is a fluid flow passage through the first piston. A first valve is provided for opening and closing the passage and first biasing means urges the valve into a position closing the passage. Second biasing means urges the second piston towards a position corresponding to the minimum volume of the second volume space. The valve opens in the direction of fluid flow through the passage and fixed means are provided for opening the valve only after a predetermined amount of movement of the first piston.

REFERENCES:
patent: 3159316 (1964-12-01), O'Donnell et al.
patent: 3185354 (1965-05-01), Lipman
patent: 3228570 (1966-01-01), Steiman
patent: 3228571 (1966-01-01), O'Donnell et al.
patent: 3331559 (1967-07-01), Fedit
patent: 3362344 (1968-01-01), Duda
patent: 3399836 (1968-09-01), Pechstein

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