David W Whitaker

US Patent:

6724564, Apr 20, 2004

Filed:

Nov 30, 2000

Appl. No.:

09/728630

Inventors:

Raffi Codilian - Irvine CA
David D. T. Nguyen - Fountain Valley CA
David L. Whitaker - Laguna Beach CA

Assignee:

Western Digital Technologies, Inc. - Lake Forest CA

International Classification:

G11B 5596

US Classification:

360 7807, 360 7804, 360 7806, 360 7809

Abstract:

A disk drive and methods for preventing a coil in a voice coil motor from overheating due to the application of excess current. The disk drive comprises a servo control system. The servo control system is adapted for applying a current to a coil of the voice coil motor thereby causing the voice coil motor to move the head according to a seek distance. The servo control system generates a plurality of seek profiles for each of a plurality of seek distances and a plurality of current limits for the plurality of seek profiles. Each of the plurality of seek profiles defines a plan for controlling the current to be applied to the coil while the voice coil motor is operated over the seek distance. The plurality of current limits each define a maximum current allowed while controlling the current to be applied to the coil.

US Patent:

7059210, Jun 13, 2006

Filed:

Jan 23, 2004

Appl. No.:

10/764086

Inventors:

James R. Thiessen - Somis CA, US
David J. Whitaker - Camarillo CA, US
Christopher A. Jenkins - Thousand Oaks CA, US

Assignee:

Thiessen Products Inc. - Camarillo CA

International Classification:

F16H 59/00

US Classification:

743375

Abstract:

A six speed gear assembly for a motorcycle transmission is provided that includes a mainshaft gear shaft with a plurality of mainshaft gears mounted in sequence thereon, wherein the sequence includes a mainshaft 4th gear, a mainshaft 3rd gear, one of a mainshaft 1st gear and a mainshaft 2nd gear, the other of the mainshaft 1st gear and the mainshaft 2nd gear, a mainshaft 6th gear, and a mainshaft 5th gear. The six speed gear assembly also includes a countershaft gear shaft with a plurality of countershaft gears mounted in sequence thereon, wherein the sequence includes a countershaft 4th gear, a countershaft 3rd gear, one of a countershaft 1st countershaft 1st gear and a countershaft 2nd gear, the other of the countershaft 1st gear and the countershaft 2nd gear, a countershaft 6th gear, and a countershaft 5th gear.

US Patent:

20060191363, Aug 31, 2006

Filed:

Jan 30, 2006

Appl. No.:

11/344262

Inventors:

James Thiessen - Somis CA, US
David Whitaker - Camarillo CA, US
Christopher Jenkins - Thousand Oaks CA, US

International Classification:

F16H 3/08

US Classification:

074325000

Abstract:

A motorcycle transmission is provided which includes a transmission case, an end cover, and a mainshaft gear shaft. The transmission case includes a main portion and a trapdoor. The end cover extends from the trap door. The mainshaft gear shaft is supported by circular bearings placed in the main portion, trapdoor, and the end cover. A lubricant path extends from inside the transmission case, through the walls of the transmission case and the end cover, to the circular bearing in the end cover.