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:
Aug. 02, 1994
Filed:
May. 06, 1993
Robert J Purcell, Washington, IL (US);
Caterpillar Inc., Peoria, IL (US);
Abstract
A hydraulic recoil and belt tension control system is connected to a hydraulic motor of an endless belt propulsion device so that a common source of fluid is used to both drive the hydraulic motor and maintain proper tension in a drive belt of the propulsion device. The hydraulic recoil and belt tension control system includes first and second check valves to direct pressurized fluid from the appropriate one of first and second motor conduits to an actuating chamber of a belt tension actuator. A relief valve relieves excessive pressure in the actuating chamber and returns fluid exhausted from the actuating chamber during recoil through either of third and fourth check valves to the appropriate one of the first and second motor conduits. Utilizing the hydraulic motor drive circuit as the source of fluid for the hydraulic recoil and belt tension control systems eliminates at least two conduits between the propulsion device and the vehicle to which the propulsion device is mounted.