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:
Nov. 21, 1978
Filed:
Oct. 31, 1977
Harold H Bartlett, Peoria, IL (US);
Rodney L Bussell, Bettendorf, IA (US);
Robert E Coats, Peoria, IL (US);
Caterpillar Tractor Co., Peoria, IL (US);
Abstract
A testing apparatus for testing the hydraulic circuits of a vehicle having at least two independent hydraulic circuits including a plurality of supplies conduits, one for each independent hydraulic circuit for receiving hydraulic fluid from the associated circuit, couplings on the supply conduits for coupling each supply conduit to an associated circuit, a return for returning hydraulic fluid to the circuits, a single particle sensor adapted to receive hydraulic fluid and provide an output signal indicative of particle contaminants in the hydraulic fluid, the return being connected to the sensor and a valve for selectively connecting any desired one of the supply conduits to the sensor and disconnecting the remainder of the supply conduits from the sensor so that contamination in any of the independent circuits may be determined with a single sensor.