Motors: expansible chamber type – Plural relatively movable or rigidly interconnected working... – Condition responsive means for modifying working member...
Patent
1988-06-29
1991-09-17
Michalsky, Gerald A.
Motors: expansible chamber type
Plural relatively movable or rigidly interconnected working...
Condition responsive means for modifying working member...
91451, 13759613, 1375992, F15B 1308, F15B 1302
Patent
active
050483960
ABSTRACT:
In the neutral position of a directional control valve in which the connection of the constant pump to the consumer is interrupted the entire delivery of the constant pump is led via a bypass valve to the tank. According to the invention the regulating range of the bypass valve is increased by an additional connection which is controlled by a further piston which in the neutral position of the directional control valve is displaced by a weak spring into the open position and thus ensures a pressureless circulation of the pump working medium to the tank.
REFERENCES:
patent: 3878864 (1975-04-01), Schurger
patent: 4798126 (1989-01-01), Budzich
Peschel Werner
Torkler Heinz
Mannesmann Rexroth GmbH
Michalsky Gerald A.
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