Gas separation: apparatus – Apparatus for selective diffusion of gases – Membrane to degasify liquid
Patent
1993-04-09
1994-07-05
Hart, Charles
Gas separation: apparatus
Apparatus for selective diffusion of gases
Membrane to degasify liquid
96 7, 96 12, 96174, B01D 5322
Patent
active
053263863
ABSTRACT:
A reservoir for use in a hydraulic circuit is disclosed which includes a passive gas separating medium to separate gas from the hydraulic fluid as it circulates through the reservoir. The gas separating medium, which may be a membrane-type diffuser, is permeable to air, but not hydraulic fluid. This allows entrained air to diffuse through the membrane element after which it may be expelled to the atmosphere. The membrane diffuser is located within the reservoir housing in a low-pressure portion of the hydraulic circuit in a space between spaced apart double walls of the reservoir such that hydraulic fluid returning to the reservoir must first pass through the membrane. The membrane may have several concentric or spiral layers, depending upon the capacity of the circuit. Gas separated from the hydraulic fluid is withdrawn from the membrane diffuser structure and may be vented to atmosphere through a valve associated with the reservoir housing.
REFERENCES:
patent: 3332216 (1967-07-01), Stern
patent: 3355861 (1967-12-01), Webb
patent: 3872014 (1975-03-01), Schell
patent: 4986837 (1991-01-01), Shibata
Lee Leung
Pavlica James J.
Grumman Aerospace Corporation
Hart Charles
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