Reciprocating hydraulic motor with a differential piston

Details Reciprocating hydraulic motor with a differential piston Reciprocating hydraulic motor with a differential piston

1992-07-16

1993-11-16

Look, Edward K.

Motors: expansible chamber type

Cyclically operable

Distributor in piston

91222, 91321, 92181P, 60370, F01L 2104, F01B 3100

Patent

active

052613119

ABSTRACT:
The invention relates to a reciprocating hydraulic motor having a differential piston interposed between an inlet pipe for fluid at a pressure P1 and an exhaust pipe for fluid at a pressure P2 which is less than the pressure P1 The moving assembly constituted by the different-section pistons that slide in a stepped cylinder includes a flap having two positions and controlling three ports, the flap being mounted to pivot about an axis. In each of its positions, the flap bears against two wall portions disposed on opposite sides of the flap and at different distances from the pivot axis so that the effect of the pressures P1 and P2 on the faces of the flap is to establish a positive closure torque.

REFERENCES:
patent: 119076 (1871-09-01), Chandler
patent: 245310 (1881-08-01), Morrison
patent: 437097 (1890-09-01), Coffield
patent: 2987051 (1961-06-01), Goyette et al.
patent: 4756329 (1988-07-01), Cloup
patent: 5137435 (1992-08-01), Walton

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