Power plants – Pressure fluid source and motor – With control means for structure storing work driving energy
Patent
1984-02-29
1985-09-10
Garrett, Robert E.
Power plants
Pressure fluid source and motor
With control means for structure storing work driving energy
60414, 60416, B27B 3100
Patent
active
045398143
ABSTRACT:
A hydraulic drive system includes a pump and averaging accumulator for providing a source of substantially constant pressure hydraulic fluid for reciprocal movement of a piston within a cylinder to move a load such as a sawmill carriage attached to the piston, and a high pressure braking accumulator operable to receive and hold hydraulic fluid under a pressure higher than the pressure of the pump discharge and of the averaging accumulator to conserve energy during deceleration of the piston and load at each end of the piston stroke. The high pressure fluid stored in the braking accumulator during braking is employed to rapidly accelerate the piston and load at the beginning of each subsequent stroke, and a bypass circuit and relief valve may be provided between the accumulators to convey fluid to the averaging accumulator for further conservation of energy upon excessive build up of pressure in the braking accumulator.
REFERENCES:
patent: 2665551 (1954-01-01), Chenault
patent: 2778193 (1957-01-01), Stockett, Jr.
patent: 2977763 (1961-04-01), Mercier
patent: 4022269 (1977-05-01), Segawa
patent: 4335993 (1982-06-01), Nowak
Baker Raymond N.
Garrett Robert E.
Husar John M.
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