Ellard D Davison

US Patent:

51294222, Jul 14, 1992

Filed:

Aug 23, 1991

Appl. No.:

7/749051

Inventors:

Ellard D. Davison - Grosse Pointe Farms MI
Lounes Rabhi - Ypsilanti MI

Assignee:

General Motors Corporation - Detroit MI

International Classification:

A61K 1500

US Classification:

137599

Abstract:

This invention relates to automatic transmissions and more particularly to valves for controlling and limiting automatic transmission breathing to reduce oxidation of the operating fluid fill. The valve permits relief of any residual pressure within the transmission housing for checking the operating fluid level.

US Patent:

41111044, Sep 5, 1978

Filed:

Mar 30, 1977

Appl. No.:

5/783052

Inventors:

Ellard D. Davison - Grosse Pointe Farms MI

Assignee:

General Motors Corporation - Detroit MI

International Classification:

F01B 3100

US Classification:

92127

Abstract:

Engine piston arrangements including at least one friction reducing gas bearing recess in a thrust loaded portion of the piston skirt and connected to the space between the top two piston rings to provide blowby gas to pressurize the bearing recess and support at least part of the thrust forces on the piston skirt.

US Patent:

50624474, Nov 5, 1991

Filed:

Apr 1, 1991

Appl. No.:

7/678406

Inventors:

Ellard D. Davison - Grosse Pointe Farms MI
Lounes Rabhi - Ypsilanti MI

Assignee:

General Motors Corporation - Detroit MI

International Classification:

F16K 1500

US Classification:

137493

Abstract:

This invention relates to automatic transmissions and more particularly to valves for controlling and limiting automatic transmission breathing to reduce oxidation of the operating fluid fill. The valve permits relief of any residual pressure within the transmission housing for checking the operating fluid level.

US Patent:

44895976, Dec 25, 1984

Filed:

Jul 8, 1983

Appl. No.:

6/512024

Inventors:

Ellard D. Davison - Grosse Pointe Farms MI

Assignee:

General Motors Corporation - Detroit MI

International Classification:

G01M 1500

US Classification:

73118

Abstract:

Vehicle drive train apparatus is disclosed having a fixed single ratio overdrive and a selective dual-ratio overdrive connecting the axles of a differential to drive a dynamometer while simulating vehicle straight line drive with no differential gear action and, alternatively, vehicle turning with certain limited differential gear action.