Peter J Bradley

US Patent:

7201244, Apr 10, 2007

Filed:

Oct 3, 2003

Appl. No.:

10/678579

Inventors:

Ronald A. Johnston - Longview TX, US
Dwight Baker - Longview TX, US
Nelson L. Stoldt - Longview TX, US
Paul K. Schufeldt - Longview TX, US
Peter J. Bradley - Longview TX, US

Assignee:

LeTourneau, Inc. - Longview TX

International Classification:

B60K 6/04

US Classification:

180 655, 903942, 903924

Abstract:

A heavy duty wheeled vehicle for an industrial environment is electrically driven by one or more switched reluctance motor traction drive system connected to the wheels. The switched reluctance motors are powered by an electrical generator that is driven by an engine, such as a diesel engine, which may run at a substantially constant RPM. A digital control system provides operator displays and controls power conversion from the generator, as well as providing maintenance and control functions for the switched reluctance motors. A heavy-duty hoisting apparatus electrically drives a hoisting mechanism using an SR motor, providing power for lifting a load. The heavy-duty hoisting apparatus may include an engine and generator or provide power to the SR motor from an external source.

US Patent:

7318580, Jan 15, 2008

Filed:

Mar 6, 2007

Appl. No.:

11/682871

Inventors:

Ronald A. Johnston - Longview TX, US
Dwight Baker - Longview TX, US
Nelson L. Stoldt - Longview TX, US
Paul K. Schufeldt - Longview TX, US
Peter J. Bradley - Longview TX, US

Assignee:

LeTourneau Technologies, Inc. - Houston TX

International Classification:

B66D 1/12

US Classification:

254362, 254323, 180 655

Abstract:

A heavy duty wheeled vehicle for an industrial environment is electrically driven by one or more switched reluctance motor traction drive system connected to the wheels. The switched reluctance motors are powered by an electrical generator that is driven by an engine, such as a diesel engine, which may run at a substantially constant RPM. A digital control system provides operator displays and controls power conversion from the generator, as well as providing maintenance and control functions for the switched reluctance motors. A heavy-duty hoisting apparatus electrically drives a hoisting mechanism using an SR motor, providing power for lifting a load. The heavy-duty hoisting apparatus may include an engine and generator or provide power to the SR motor from an external source.

US Patent:

20070193794, Aug 23, 2007

Filed:

Mar 6, 2007

Appl. No.:

11/682870

Inventors:

Ronald Johnston - Longview TX, US
Dwight Baker - Longview TX, US
Nelson Stoldt - Longview TX, US
Paul Schufeldt - Longview TX, US
Peter Bradley - Longview TX, US

Assignee:

LeTourneau Technologies, Inc. - Houston TX

International Classification:

B60L 8/00

US Classification:

180065300

Abstract:

A heavy duty wheeled vehicle for an industrial environment is electrically driven by one or more switched reluctance motor traction drive system connected to the wheels. The switched reluctance motors are powered by an electrical generator that is driven by an engine, such as a diesel engine, which may run at a substantially constant RPM. A digital control system provides operator displays and controls power conversion from the generator, as well as providing maintenance and control functions for the switched reluctance motors. A heavy-duty hoisting apparatus electrically drives a hoisting mechanism using an SR motor, providing power for lifting a load. The heavy-duty hoisting apparatus may include an engine and generator or provide power to the SR motor from an external source.