Philip L. Cowan

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Houston, TX, US

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Patents Grantslast 30 patents

Information Patent Grant
Low friction proportional unloading valve
- Patent number 5,090,437
- Issue date Feb 25, 1992
- Philip L. Cowan
- F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
Information Patent Grant
Bi-directional reciprocating pump mechanism
- Patent number 5,051,074
- Issue date Sep 24, 1991
- Philip L. Cowan
- F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
Information Patent Grant
Anti-leak seal for pump motor
- Patent number 5,031,509
- Issue date Jul 16, 1991
- Titan Tool, Inc.
- Philip L. Cowan
- F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
Information Patent Grant
Automatic reversing valve
- Patent number 4,870,890
- Issue date Oct 3, 1989
- Philip L. Cowan
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Grant
Constant power variable volume pump
- Patent number 4,723,892
- Issue date Feb 9, 1988
- Philip L. Cowan
- F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...