The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 20, 2007
Filed:
Sep. 27, 2004
Gerald M. Berg, Lisbon, ND (US);
Gerald M. Berg, Lisbon, ND (US);
Clark Equipment Company, Montvale, NJ (US);
Abstract
A self propelled power machine is provided with a drive system and a traction lock mechanism. The drive system includes a speed range selector and associated mechanism that can operate the power machine in high and low speed ranges. The traction lock mechanism, when applied stops the drive system from moving the wheels of the power machine. A controller insures the drive system is in the low speed range prior to engaging the traction lock mechanism. The controller determines whether the drive system is operating in a low speed range or a high speed range. If the drive system is in the high speed range, the controller places the drive system in the low speed range and the controller then applies the traction lock after a short time delay to provide some dynamic slowing of the drive. If the system is already in the low speed range, the drive system remains there and the controller applies the traction lock.