Leung S Lee

US Patent:

53263863, Jul 5, 1994

Filed:

Apr 9, 1993

Appl. No.:

8/045602

Inventors:

Leung Lee - Brooklyn NY
James J. Pavlica - East Northport NY

Assignee:

Grumman Aerospace Corporation - Bethpage NY

International Classification:

B01D 5322

US Classification:

96 6

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 Gas separated from the hydraulic fluid is withdrawn from the membrane diffuser structure and may be vented to atmosphere through a valve associated with the reservoir housing.

US Patent:

D3694844, May 7, 1996

Filed:

Feb 22, 1995

Appl. No.:

D/035216

Inventors:

Leung C. Lee - Brooklyn NY

Assignee:

Jecmel Jewelry, Inc. - Long Island City NY

US Classification:

D6467