Donald Jeffrey Mccarthy

US Patent:

6394050, May 28, 2002

Filed:

Sep 15, 2000

Appl. No.:

09/663412

Inventors:

Donald J. McCarthy - Wethersfield CT
Dennis R. Custer - West Granby CT

Assignee:

Diesel Engine Retarders, Inc. - Christiana DE

International Classification:

F01L 100

US Classification:

123 901, 123 9039, 123 9045, 123 9016

Abstract:

The present invention is directed to an actuator piston assembly for use in a rocker arm system. The actuator piston assembly is capable of actuating at least one engine valve during for example engine braking. The actuator piston assembly includes a piston body having a hollow interior, a screw assembly received within the hollow interior of the screw assembly, a biasing assembly for biasing the piston body with respect to the screw assembly, a cap assembly located within the hollow interior, wherein the biasing assembly interacts with the cap assembly and the screw assembly, and a securing assembly for movably securing the piston body to the screw assembly.

US Patent:

6691674, Feb 17, 2004

Filed:

Jun 13, 2002

Appl. No.:

10/167664

Inventors:

Donald J. McCarthy - Wethersfield CT
Samuel H. Pruden - East Hartford CT

Assignee:

Diesel Engine Retarders, Inc. - Christiana DE

International Classification:

F02D 1304

US Classification:

123321, 123 9016, 123 9017

Abstract:

A method and rocker arm assembly for actuating an engine valve are disclosed. The rocker arm may include an integrated hydraulic circuit used to control a lost motion piston. A reset piston may be included in the rocker arm to selectively reset the position of the lost motion piston. A control piston may also be included in the rocker arm to selectively lock the reset piston into a reset position. The rocker arm assembly may be used to achieve compression-release or bleeder braking, main intake, main exhaust, brake gas recirculation, and/or exhaust gas recirculation valve events.

US Patent:

59752513, Nov 2, 1999

Filed:

Oct 2, 1998

Appl. No.:

9/165291

Inventors:

Donald J. McCarthy - Wethersfield CT

Assignee:

Diesel Engine Retarders, Inc. - Wilmington DE

International Classification:

F02D 1304

US Classification:

188 31

Abstract:

The present invention is directed to a locking assembly for use in a rocker arm assembly for an engine brake assembly. The rocker arm assembly includes a rocker arm pivotally mounted on a shaft. The rocker arm has a first end and a second end, wherein the first end includes a cam follower and the second end includes an actuator assembly for operating at least one valve during a braking operation. The improved rocker arm includes a locking assembly for releasably securing the rocker arm to the shaft to prevent pivoting of the rocker arm during a positive power operation. The locking assembly includes a releasable latching assembly located on one of the rocker arm and the shaft. The locking assembly also includes a latch receiving recess located on another of the rocker arm and the shaft. The releasable latching assembly engages the latch receiving recess during a positive power operation. The releasable latching assembly disengaging the latch receiving recess during an engine braking operation such that the rocker arm can pivot about the shaft.

US Patent:

48403873, Jun 20, 1989

Filed:

Jan 20, 1988

Appl. No.:

7/146279

Inventors:

Donald J. McCarthy - Wethersfield CT

Assignee:

The Jacobs Manufacturing Company - Bloomfield CT

International Classification:

B23B 522
B23B 534

US Classification:

279 1K

Abstract:

A self-actuating keyless chuck for use with a reversible powered driver is disclosed. The chuck comprises a body which carries a rotatable split nut and a plurality of slidable jaws driven by the rotatable nut. A sleeve member is rotatably connected to the body and carries an impact ring provided with a first impact dog. A second impact dog is associated with the split nut. Spring means are provided to bias the first impact dog toward engagement with the second impact dog whereby the jaws will be tightened or loosened whenever the rotation of the sleeve is restrained and the powered driver is actuated.