Thomas L Perry

US Patent:

7225969, Jun 5, 2007

Filed:

Dec 10, 2004

Appl. No.:

11/009405

Inventors:

Yen-Lung Chen - Troy MI, US
Thomas Arthur Perry - Bruce Township MI, US
Anita M. Weiner - West Bloomfield MI, US

Assignee:

GM Global Technology Operations, Inc. - Detroit MI

International Classification:

B23K 20/12
B23K 31/02

US Classification:

2281121, 228 21

Abstract:

A surface of an article is heated and subjected to pressure by operation of a friction stir tool. The pressure of the face of the tool on the article surface, and the speed of rotation of the tool and of its progression along the surface of the article, are controlled to progressively hot-work a specified surface area. The face of the tool may be round and have a profiled, axially extending, smaller diameter pin for higher concentration of frictional heat and load and for plasticizing a surface layer of the workpiece. Such hot work may be applied for reducing surface porosity or for producing another change in the surface microstructure, or for effecting another change in surface material properties.

US Patent:

7240576, Jul 10, 2007

Filed:

Jan 12, 2006

Appl. No.:

11/330763

Inventors:

Thomas A. Perry - Bruce Township MI, US

Assignee:

GM Global Technology Operations, Inc. - Detroit MI

International Classification:

G01D 21/00

US Classification:

738665

Abstract:

A corrosion resistant weldable boss includes a body portion having a lower portion formed of a sintered powder, e. g. , ferrous powder, which is readily welded to a vehicle structure surface. A capping member is sintered to an upper portion of the body portion and is formed of a corrosion resistant material such as sintered stainless steel powder. Also disclosed herein are processes for inhibiting corrosion of a sensor operating in a corrosive environment about a vehicle.

US Patent:

7354528, Apr 8, 2008

Filed:

Sep 22, 2005

Appl. No.:

11/233449

Inventors:

John C. Ulicny - Oxford MI, US
Thomas A. Perry - Bruce Township MI, US
Mark A. Golden - Washington MI, US

Assignee:

GM Global Technology Operations, Inc. - Detroit MI

International Classification:

H01F 1/44

US Classification:

252 6252

Abstract:

A magnetorheological fluid composition comprising a low aspect ratio magnetizable particle comprising a unimodal particle distribution and an aspect ratio less than 1. 5, a high aspect ratio magnetizable particle comprising an aspect ratio greater than 1. 5, and a carrier fluid.

US Patent:

7921901, Apr 12, 2011

Filed:

Apr 16, 2008

Appl. No.:

12/103755

Inventors:

Jongcheol Shin - Kyonggi-Do, KR
Jongwon B Park - Incheon, KR
Inwook Hwang - Daejeon, KR
Thomas A. Perry - Bruce Township MI, US
Anil K. Sachdev - Rochester Hills MI, US
Jon T. Carter - Farmington MI, US

Assignee:

GM Global Technology Operations LLC - Detroit MI

International Classification:

B22D 29/00

US Classification:

164132

Abstract:

Some die cast aluminum alloy articles have internal cylindrical surfaces such as the round internal cylinder surfaces of a cylinder block for an internal combustion engine. During casting solidification molten aluminum alloys shrink against the metallic permanent mold tools used to mold and define such internal surfaces, and tend to stick to the tool surfaces making it difficult to remove the casting. The tendency of some aluminum casting alloys to solder to the tool can further intensify sticking. In this invention, an aluminum alloy sleeve is placed on and over the tool surface before casting and the sleeve isolates the tool from the molten aluminum. The sleeve becomes bonded to the casting and facilitates removal of the casting from the tool. The sleeve may be (and preferably is) fully machined from the internal casting surface. The sleeve may be of the same composition as the casting, in which case handling and recycling of machining chips would be facilitated.

US Patent:

8002473, Aug 23, 2011

Filed:

May 30, 2008

Appl. No.:

12/130034

Inventors:

Edward P. Becker - Brighton MI, US
Anil K. Sachdev - Rochester Hills MI, US
Emerson J. Adams - Sterling Heights MI, US
Thomas A. Perry - Bruce Township MI, US

Assignee:

GM Global Technology Operations LLC - Detroit MI

International Classification:

F16C 33/76
F16C 9/00

US Classification:

384477, 384130, 384250, 384273, 384457, 384570

Abstract:

A crankshaft has spaced-apart cheeks and a cylindrical surface between the cheeks. A split ring bearing assembly has first and second bearing parts that join to encircle the cylindrical surface. First and second split ring seal assemblies each have first and second seal parts that join to encircle and sealingly contact with the cylindrical surface on each side of the split ring bearing assembly. A journal includes a first and second journal halves having cylindrical recesses receiving the crankshaft so that the split ring bearing assembly bears upon the journal and the first and second split ring seal assemblies sealingly contact with the journal halves. A lube fill fitting is provided in the journal for the introduction of lubricant which is permanently sequestered between the first and second split ring seal assemblies to provide sealed lubrication of the split ring bearing assemblies.

US Patent:

8065986, Nov 29, 2011

Filed:

Jul 25, 2008

Appl. No.:

12/179800

Inventors:

Anil K. Sachdev - Rochester Hills MI, US
Mark W. Verbrugge - Troy MI, US
Thomas A. Perry - Bruce Township MI, US
Edward P. Becker - Brighton MI, US
Emerson J. Adams - Sterling Heights MI, US

Assignee:

GM Global Technology Operations LLC - Detroit MI

International Classification:

F01M 1/02
F01M 11/10

US Classification:

123196R, 123196 S

Abstract:

A method is disclosed for initiating oil injection into a cylinder of an internal combustion engine prior to engine start-up, the oil injection protecting the engine from damage caused by insufficient lubrication during the start-up. The method includes processing data to modulate a lubrication initiation modifier and initiating the oil injection on the basis of the lubrication initiation modifier.

US Patent:

8197199, Jun 12, 2012

Filed:

Dec 2, 2008

Appl. No.:

12/326339

Inventors:

Thomas A. Perry - Bruce Township MI, US
Carnell E. Williams - Pontiac MI, US
Julian Velosa - Novi MI, US
Anil K. Sachdev - Rochester Hills MI, US

Assignee:

GM Global Technology Operations LLC - Detroit MI

International Classification:

F04D 29/02

US Classification:

415200, 4152171

Abstract:

A turbocharger includes a center housing having a bearing surface configured to contact an inner surface of a unison ring. A conversion coating is impregnated onto at least the bearing surface of the center housing.

US Patent:

8312914, Nov 20, 2012

Filed:

May 24, 2010

Appl. No.:

12/785796

Inventors:

Michael J. Walker - Windsor, CA
Anil K. Sachdev - Rochester Hills MI, US
Thomas A. Perry - Bruce Township MI, US
Mark A. Osborne - Grand Blanc MI, US
Paul Boone - Rochester Hills MI, US

Assignee:

GM Global Technology Operations LLC - Detroit MI

International Classification:

B22D 19/00
B22D 19/04

US Classification:

164333, 164334, 164109

Abstract:

A mold for forming a plurality of rotors includes a plurality of lamination stacks, wherein each lamination stack defines at least one void therethrough; a tube having a central longitudinal axis, wherein each lamination stack is concentrically spaced apart from the tube to define a channel therebetween; a plurality of washers each having a shape defined by a first diameter and a second diameter that is greater than the first diameter, wherein each washer is configured to concentrically abut the tube and define a feed conduit interconnecting with the channel; and a shell disposed in contact with each lamination stack and concentrically spaced apart from each washer to define a plurality of ducts, wherein each duct is interconnected with the at least one void of at least one lamination stack. A mold system and a method of forming a plurality of rotors are also described.