James D. Symons

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Southfield, MI, US

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Patents Grantslast 30 patents

Information Patent Grant
Combined vacuum pump, bearing and seal assembly
- Patent number 4,645,414
- Issue date Feb 24, 1987
- General Motors Corporation
- Arnold O. DeHart
- F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
Information Patent Grant
Sealing surface and method
- Patent number 4,573,690
- Issue date Mar 4, 1986
- General Motors Corporation
- Arnold O. DeHart
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Grant
Low friction dynamic seal assembly with centrifugal deflection
- Patent number 4,572,516
- Issue date Feb 25, 1986
- General Motors Corporation
- James D. Symons
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Grant
Method of making a cast iron sealing ring
- Patent number 4,441,349
- Issue date Apr 10, 1984
- General Motors Corporation
- James D. Symons
- B24 - GRINDING POLISHING
Information Patent Grant
Fluid seal
- Patent number 4,300,777
- Issue date Nov 17, 1981
- General Motors Corporation
- James D. Symons
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...