Caterpillar Tractor Co.

Harold H Bartlett, Jr

Charles H Herr, Jr

Ivan R Lamport

Lionel L Kinney

Clarence A Welch

Rodney L Bussell

Robert E Coats

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.

Testing apparatus for hydraulic circuits

A disc brake dynamometer including a base, a shaft adapted to be coupled to a rotary motive source to be tested, a pair of axially spaced, fluid-cooled, disc brakes concentric about the shaft and each having two relatively rotatable members, one of the members of each brake being journalled on the shaft and being affixed to the base, thereby journalling the shaft on the base and the other of the two relatively rotatable members being connected to the shaft for rotation therewith, and a load measuring device connected to the members which are affixed to the base. Two embodiments are disclosed.

Dynamometer employing multiple disc brake assemblies

A test stand for vehicles having opposed motive drive outputs including a stand for supporting the vehicle to be tested in a predetermined position with its motive drive outputs free from engagement with surrounding structure, a pair of dynamometers, one on each side of the stand, a pair of releasable couplings, one drivingly associated with each of the dynamometers, and adapted to be engaged with a corresponding one of the motive drive outputs of a vehicle on the supporting stand and a movable mount for at least the releasable couplings so that they may be moved toward and away from each other and the supporting stand. Also disclosed is an improved dynamometer construction, an improved self-aligning coupling and an improved method of testing a mobile mechanical power source such as a vehicle.

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Peoria, IL, United States of America

Harold H Bartlett, Jr