Automatic pressurized reservoir bleed valve

Details Automatic pressurized reservoir bleed valve Automatic pressurized reservoir bleed valve

1988-01-29

1989-03-21

Cohan, Alan

Fluid handling

Diverse fluid containing pressure systems

Fluid separating traps or vents

137199, F16K 2400

Patent

active

048134465

ABSTRACT:
An automatic bleed valve for bleeding air from a pressurized liquid reservoir or, with reversal of principal elements, bleeding liquid from a compressed gas reservoir comprises a piston in a piston chamber located in a flow passage leading from the reservoir. A capillary passage is provided through the piston, and the piston is urged upstream by a resilient spring. An orifice is located in the fluid channel. A sealing element is provided at the downstream end of the piston chamber. Upon activation of the hydraulic system while air is being expelled from the reservoir, the resilient spring will retain the piston in the upstream position, allowing gas to be bled from the reservoir through the fluid passage in the piston. When liquid begins to flow from the reservoir, the pressure differential over the piston increases, causing the piston to move against the downstream end of the piston chamber and seal off the fluid channel and the hydraulic reservoir.

REFERENCES:
patent: 1873396 (1932-08-01), Hallenbeck
patent: 2362724 (1944-11-01), Shea
patent: 2544476 (1951-03-01), Venning
patent: 2700303 (1955-01-01), Galliers
patent: 2729228 (1956-01-01), Stevenson
patent: 2902044 (1959-09-01), Sherer et al.
patent: 2908282 (1959-10-01), Maisch
patent: 3081788 (1963-03-01), Lewis
patent: 4388047 (1983-06-01), Mizuno et al.
patent: 4524793 (1985-06-01), Silverwater

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