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. 18, 1997
Filed:
Feb. 20, 1996
Kabushiki Kaisha Komatsu Seisakusho, Tokyo, JP;
Abstract
A turning speed control system for use in a track-laying vehicle comprising: a steering motor for driving crawler belts provided at both sides of the vehicle such that a relative travel difference is caused between the crawler belts, thereby turning the vehicle to the right or left; a steering instructing device which can be displaced from a neutral position by operation and which instructs, according to the direction and distance of its displacement, a turning direction and a turning radius for the vehicle, the turning radius decreasing as the displacement distance increases; a displacement detector for detecting the displacement of the steering instructing device; and a control unit for performing a control such that when making the turning radius of the vehicle small by increasing the revolution speed of the steering motor according to the displacement of the steering instructing device detected by the displacement detector such that the crawler belts are driven with a relative travel difference therebetween, if the displacement distance of the steering instructing device exceeds a maximum steering motor revolution speed displacement value at which the steering motor reaches its maximum revolution speed, the vehicle speed at which the vehicle moves forwards or backwards is reduced as the displacement of the steering instructing device proceeds, while the maximum revolution speed of the steering motor being maintained, until the steering instructing device reaches a position corresponding to its maximum displacement value.