Douglas A. Collings

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Tecumseh, MI, US

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Patents Grantslast 30 patents

Information Patent Grant
Compressor assembly with piston having multiple cross sections
- Patent number 7,273,355
- Issue date Sep 25, 2007
- Tecumseh Products Company
- Douglas A Collings
- F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
Information Patent Grant
Expansion device arrangement for vapor compression system
- Patent number 7,178,362
- Issue date Feb 20, 2007
- Tecumseh Products Cormpany
- Douglas A. Collings
- F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
Information Patent Grant
Compressor assembly with reciprocating piston and vented cylinder
- Patent number 7,175,400
- Issue date Feb 13, 2007
- Tecumseh Products Company
- Douglas A Collings
- F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
Information Patent Grant
Suction valve with variable slot width
- Patent number 6,368,085
- Issue date Apr 9, 2002
- Tecumseh Products Company
- Douglas A. Collings
- F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
Information Patent Grant
Discharge muffler arrangement
- Patent number 6,176,688
- Issue date Jan 23, 2001
- Tecumseh Products Company
- Douglas A. Collings
- F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...

Patents Applicationslast 30 patents

Information Patent Application
Expansion device arrangement for vapor compression system
- Publication number 20060162377
- Publication date Jul 27, 2006
- Douglas A. Collings
- F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
Information Patent Application
Compressor assembly with piston having multiple cross sections
- Publication number 20050129542
- Publication date Jun 16, 2005
- Douglas A. Collings
- F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
Information Patent Application
Compressor assembly with reciprocating piston and vented cylinder
- Publication number 20050129543
- Publication date Jun 16, 2005
- Douglas A. Collings
- F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...