Mark W Jarrett

US Patent:

6364565, Apr 2, 2002

Filed:

Feb 1, 2000

Appl. No.:

09/495669

Inventors:

James J. Billimack - Metamora IL
Mark W. Jarrett - Morton IL
Neil E. Johnston - East Peoria IL

Assignee:

Caterpillar Inc. - Peoria IL

International Classification:

F16J 116

US Classification:

403150, 403156, 403308

Abstract:

A method for reducing the incidence of piston pin failure by providing a retainer assembly for piston pin plugs such that the plugs cannot be removed or shaken lose during operation. A plastic rod is inserted into the piston pin, and the rod is ultrasonically welded to the stems of mushroom-shaped plastic piston plugs such that the plugs cover the open ends of the pin and are held in place by the cooperation of structure between the plugs and the rod. In an alternate embodiment, the stem of each pin plug is hollow and a respective internally threaded brass insert is disposed in the stem and ultrasonically welded therein. An externally threaded rod is then engaged with the two internally threaded inserts to hold the plugs on the piston pin.

US Patent:

6550138, Apr 22, 2003

Filed:

Nov 27, 2001

Appl. No.:

09/995172

Inventors:

James J. Billimack - Metamora IL
Mark W. Jarrett - Morton IL
Neil E. Johnston - East Peoria IL

Assignee:

Caterpillar Inc - Peoria IL

International Classification:

B21K 144

US Classification:

2988805, 403150, 403308, 403161, 29888043

Abstract:

A method for reducing the incidence of piston pin failure by providing a retainer assembly for piston pin plugs such that the plugs cannot be removed or shaken lose during operation. A plastic rod is inserted into the piston pin, and the rod is ultrasonically welded to the stems of mushroom-shaped plastic piston plugs such that the plugs cover the open ends of the pin and are held in place by the cooperation of structure between the plugs and the rod. In an alternate embodiment, the stem of each pin plug is hollow and a respective internally threaded brass insert is disposed in the stem and ultrasonically welded therein. An externally threaded rod is then engaged with the two internally threaded inserts to hold the plugs on the piston pin.

US Patent:

7383806, Jun 10, 2008

Filed:

May 18, 2005

Appl. No.:

11/131743

Inventors:

Hind Abi-Akar - Peoria IL, US
Xiangyang Jiang - Dunlap IL, US
Jorge R. Agama - Peoria IL, US
Kurtis C. Kelley - Washington IL, US
Mark W. Jarrett - Washington IL, US

Assignee:

Caterpillar Inc. - Peoria IL

International Classification:

F01L 1/14

US Classification:

1231936, 123668

Abstract:

Carbon deposits on engine components can negatively affect engine performance. An engine of the present disclosure includes at least one carbon deposit resistant engine component attached to an engine housing. The engine component includes at least one relatively high surface tension surface that is a non-contact wear surface and to which a relatively low surface tension coating is attached. The relatively low surface tension coating has a surface tension at least one of equal to and less than 30 dyne/cm.

US Patent:

7654240, Feb 2, 2010

Filed:

Aug 18, 2006

Appl. No.:

11/505803

Inventors:

Mark Wayne Jarrett - Washington IL, US
Brent Michael Hunold - Apex NC, US

Assignee:

Caterpillar Inc. - Peoria IL

International Classification:

F02F 3/00

US Classification:

1231936

Abstract:

A piston for an internal combustion engine has an upper crown with a top and a bottom surface, and a lower crown with a top and a bottom surface. The upper crown and the lower crown are fixedly attached to each other using welds, with the bottom surface of the upper crown and the top surface of the lower crown forming a mating surface. The piston also has at least one centrally located air gap formed on the mating surface. The air gap is sealed to prevent substantial airflow into or out of the air gap.

US Patent:

20080271712, Nov 6, 2008

Filed:

May 27, 2008

Appl. No.:

12/127359

Inventors:

Hind M. Abi-Akar - Peoria IL, US
Xiangyang Jiang - Dunlap IL, US
Jorge R. Agama - Peoria IL, US
Mark W. Jarrett - Washington IL, US
Kurtis C. Kelley - Washington IL, US

Assignee:

CATERPILLAR INC. - Peoria IL

International Classification:

F02M 61/16
C25D 11/00
B05D 1/18

US Classification:

123468, 205317, 4274301

Abstract:

Carbon deposits on engine components can negatively affect engine performance. An engine of the present disclosure includes at least one carbon deposit resistant engine component attached to an engine housing. The engine component includes at least one relatively high surface tension surface that is a non-contact wear surface and to which a relatively low surface tension coating is attached. The relatively low surface tension coating has a surface tension at least one of equal to and less than 30 dyne/cm.

US Patent:

6112642, Sep 5, 2000

Filed:

Oct 6, 1998

Appl. No.:

9/168396

Inventors:

Mark W. Jarrett - Morton IL
Werner H. Koeslin - Peoria IL
Robert L. Weber - Lacon IL

Assignee:

Caterpillar Inc. - Peoria IL

International Classification:

F01B 3108

US Classification:

92186

Abstract:

Past pistons have been susceptible to reduced longevity due to increased forces of combustion thereon during operating cycles of an engine. The present two piece unitary piston increases the longevity of pistons used with increased forces of combustion. For example, a head member has a crown portion defining a ring band portion having a bottom surface and a support portion. And, a skirt member defines a ring band support surface and a mating portion. The head member and the skirt member have a preestablished material strength being generally the same. The head member and the skirt member are joined at an interface of the support portion and the mating portion by an interference fit and are joined at the interface of the bottom surface and the ring band support surface by a weld. The force of combustion acting on the crown portion is resisted by the ring band support surface being in contacting relationship with the bottom surface. Thus, the skirt member structure supports and resists the bending moment of the combustion forces on the head member.

US Patent:

61551570, Dec 5, 2000

Filed:

Oct 6, 1998

Appl. No.:

9/167444

Inventors:

Mark W. Jarrett - Morton IL

Assignee:

Caterpillar Inc. - Peoria IL

International Classification:

F01B 3108

US Classification:

92186

Abstract:

Past pistons have been susceptible to reduced longevity due to increased forces of combustion thereon during operating cycles of an engine. The present two piece unitary piston increases the longevity of pistons used with increased forces of combustion. For example, a head member has a crown portion defining a ring band portion having a bottom surface and a support portion. And, a skirt member defines a ring band support surface and a top surface. The head member and the skirt member have a preestablished material strength being generally the same. The head member and the skirt member are joined by an inertia welding process. The force of combustion acting on the crown portion is resisted by the ring band support surface being in contacting relationship with the bottom surface. Thus, the skirt member structure supports and resists the bending moment of the combustion forces on the head member.