Three-way lever control for hydraulic control circuit

Claim 1

A hydraulic control circuit comprising a three-way lever control adapted to actuate separate valves comprising a stationary support, an articulated handle having a first arm, adapted to actuate a first valve, pivotally mounted on said support for pivotal movement about a first axis, a second arm, adapted to actuate a second valve, pivotally mounted on said first arm for pivotal movement about a second axis disposed transversely relative to said first axis, and a third arm, adapted to actuate a third valve, pivotally mounted on said second arm for pivotal movement about a third axis, first and second control valves each having a stem reciprocally mounted therein, means pivotally interconnecting each of said first and second arms with a respective one of said valve stems whereby pivotal movement of said handle about said first axis will reciprocate one of said valve stems and pivotal movement of said handle about said second axis will reciprocate the other one of said valve stems, electrical switch means mounted on said second arm, closely adjacent to said third arm for actuation thereby, an electrically actuated third control valve operatively connected to said switch means, a pressurized fluid source operatively connected to said first and second control valves, fluid actuated first cylinder means operatively connected to one of said first and second control valves for actuation thereby, and fluid actuated second and third cylinder means operatively connected to said third control valve for actuation thereby, said third control valve operatively connected to the other one of said first and second control valves.