Hydraulic power tool

Claim 1

A manually operated tool comprising a housing and an electric motor in the housing, a shaft for said electric motor, a pump body connected to said housing, a shaft in the pump connected with respect to the electric motor shaft, a rotary pump element driven by said shaft in said pump body upon energization of said electric motor, a cylinder and piston, a valve positionable to direct fluid from one end of the cylinder to the other end thereof, a thrust block mounted on said pump body, a free-ended bifurcated member on said pump body providing a guideway, said thrust block being located in said guideway and being reciprocable therein, an operative tool mounted on the outer end of said bifurcated member being operated by said thrust block in its reciprocatory action, a manually operated handle pivotally mounted on the electric motor, an on and off switch for said electric motor, means associated with said handle for turning said switch on, interconnecting means between said handle and said valve for operating said valve, said valve being reciprocatory, and a lost motion connection for said interconnecting means causing the switch to operate before the operation of the valve.