Cryogenic Pump
AssigneeWestport Power Inc.
InventorsAlexis Lefevre, Pierre Papirer
Life of this patent
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Abstract
A cryogenic pump is typically used to supply high pressure natural gas to an engine. The pump has a piston operable to discharge cryogenic liquid from a pumping chamber within a pump housing. The cryogenic liquid exits the chamber through an outlet port in which a check valve is positioned. The check valve has a valve member which is loaded by a spring and is retained by a retaining member accessible from outside the housing. The check valve has an inlet which is axial with the valve member and an outlet which is transverse to the axis of the valve member.
Claims11
A cryogenic pump for pumping liquid natural gas comprising:
- (a) a piston operable to discharge cryogenic liquid from a pumping chamber within a pump housing;
- (b) an outlet port from said pumping chamber, said outlet port disposed in said pump housing;
- and
- (c) a check valve in said outlet port, said check valve comprising:
- (i) a valve member;
- (ii) a demountable retaining member accessible from the exterior of said pump housing;
- (iii) an inlet axial with said valve member and transverse to the axis of said pumping chamber of said cryogenic pump;
- and
- (iv) an outlet transverse to the axis of said valve member and parallel to the axis of said pumping chamber of said cryogenic pump.
Dependencies are inferred from the claim text.