Double bellows purge valve

Details Double bellows purge valve Double bellows purge valve

1987-04-10

1989-06-13

Rolla, Joseph J.

Dispensing

With discharge assistant

With material supply container and discharge assistant with...

222378, 222380, 222381, 222487, 1374933, 239453, 417435, 417473, B67D 540

Patent

active

048384623

ABSTRACT:
A liquid dispensing unit is described. The unit includes a first valve element that is held within a liquid passageway by a first spring mechanism. This spring mechanism is designed to yield under pressure to allow the first valve element to move off a valve seat in the opening to allow liquid to pass through. In order to allow air that is trapped on the downstream side of the valve element to escape, air vents are provided in the first valve element. A second valve element is held under compressive force by a second spring over air vents located in the first valve element.

REFERENCES:
patent: 2492280 (1949-12-01), Groves
patent: 4174790 (1979-11-01), Nozawa et al.
patent: 4189064 (1980-02-01), O'Neill et al.
patent: 4402461 (1983-09-01), Mosse et al.
patent: 4602707 (1986-07-01), Zumwinkel et al.

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