Paccar Inc.

Ramsey Winch Company

Harold M Ball

James W Mundis

Robert G Beach

The present invention comprises a hydraulic sensing means to be used in connection with a worm/worm wheel gear arrangement for articulating a boom mounted on a vehicle. A hydraulic chamber on each side of the worm is formed by a bearing retainer and a piston. A worm thrust in the direction of either hydraulic chamber increases the fluid pressure in that particular chamber, which causes the fluid pressure in a closed hydraulic circuit to increase. The pressure increase is sensed by a fluid pressure gauge which sends a signal and/or terminates input power to the worm if the increase in fluid pressure is above a predetermined pressure.

Load sensing device for a boom mounted on a vehicle

A winch clutch which comprises a cable drum, a power shaft with at least four slots spaced equidistant apart on the surface of the said power shaft; a cylindrical clutch housing having a bore, the said cylindrical clutch housing fitting around the said power shaft; four dowel pins spaced equidistantly and being located in the inner surface of the said cylindrical clutch housing; a clutch locking ring in assembly with steel balls, the said clutch locking ring being actuated by movement of a shifting yoke acting against a set of springs and moving said clutch locking ring causing the said steel balls to move the said dowel pins into the said slots in the said power shaft.

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Broken Arrow, OK, United States of America

Harold M Ball