Motor driven hydraulic tool with variable displacement hydraulic

Details Motor driven hydraulic tool with variable displacement hydraulic Motor driven hydraulic tool with variable displacement hydraulic

1994-09-13

1995-12-26

Ryznic, John E.

Power plants

Pressure fluid source and motor

Condition responsive control of pump or motor displacement

417219, 173148, F16D 3102, B23Q 500, F04B 106

Patent

active

054776805

ABSTRACT:
A hydraulic drive system for a battery operated portable compression tool. The tool has an electric motor. The drive system has a self-regulating variable displacement pump with a rotatable conduit frame having radial conduits, pistons reciprocally located in the conduits, and a ring bearing surrounding the conduit frame in an eccentric adjustable location. Ends of the pistons are located against the inside of the ring bearing. A valve plate located against a front end of the rotatable conduit frame to control entry and exit of fluid into and out of the conduit frame as it is rotated.

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patent: 5243761 (1993-09-01), Sullivan et al.

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