Paul M Crepeau

US Patent:

6732699, May 11, 2004

Filed:

Oct 4, 2002

Appl. No.:

10/264697

Inventors:

Shekhar G. Wakade - Grand Blanc MI
Paul Noles Crepeau - Clawson MI
Grant K. Tappen - Washington MI

Assignee:

General Motors Corporation - Detroit MI

International Classification:

F02F 700

US Classification:

1231932

Abstract:

A cast iron cylinder liner for an engine has a body with a radial upper flange and a generally cylindrical wall extending axially from an inner portion of the flange. An arcuate fillet is formed at a juncture between the upper flange and an exterior of the cylindrical wall. To strengthen the juncture of thin wall liners, for example with wall thickness less than 2. 5 mm, a portion adjacent the fillet is laser hardened to a selected depth of the wall, thus increasing resistance to stresses created in the wall when the liner is installed and operating in an engine.

US Patent:

53987500, Mar 21, 1995

Filed:

Apr 28, 1994

Appl. No.:

8/235025

Inventors:

Paul N. Crepeau - Saginaw MI
Gordon A. Tooley - Midland MI
A. Dean Vander Jagt - Essexville MI

Assignee:

General Motors Corporation - Detroit MI

International Classification:

B22D 3900
B22D 4600

US Classification:

1641542

Abstract:

The machine includes a train of molds moving through an arcuate pouring zone, a supply vessel for the metal, a trough extending between the vessel and the mold trains to convey the metal therebetween. The metal is discharged from beneath the surface of the metal in the vessel and into one end of the trough beneath the surface of the metal therein. The other end of the trough is registered with a mold in the trains and moves with the trains while metal is dispensed into the mold from beneath the surface of the metal in the trough. Valves control the discharging and dispensing of the metal to and from the trough. A motor moves the trough, as needed, in the pouring cycle, and a coupler coordinates the movement of the trough and the mold to keep them registered in the pouring zone.