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:
Sep. 04, 2001
Filed:
Nov. 19, 1999
Toshio Ibuki, Hirakata, JP;
Komatsu Ltd., Tokyo, JP;
Abstract
A clutch and brake control system for a tracklaying construction vehicle is disclosed, which comprises a turning operation system and a driving brake operation system. The turning operation system is operative to carry out slow turning steering and quick turning steering of the vehicle by controlling clutches provided for right and left crawler belts for the purpose of transmitting driving force to the crawler belts and controlling brakes provided for right and left crawler belts for the purpose of stopping the rotation of the crawler belts. The driving brake operation system is operative to stop the vehicle by actuating only both of the brakes. To simplify a control linkage extending from an operating section to valves thereby reducing looseness and deflection to improve operability, the brakes are each composed of (i) a steering brake valve for carrying out brake releasing or brake actuation by delivering or reducing fluid pressure with respect to a brake hydraulic circuit according to the operation of the turning operation system and (ii) a driving brake valve for carrying out brake actuation by reducing fluid pressure in the brake hydraulic circuit according to the operation of the driving brake operation system.