Motors: expansible chamber type – With motive fluid valve – Expanding chamber inlet controlled by contracting chamber...
Patent
1986-12-22
1987-09-22
Michalsky, Gerald A.
Motors: expansible chamber type
With motive fluid valve
Expanding chamber inlet controlled by contracting chamber...
91446, 137596, 1375961, 13759613, F15B 1302
Patent
active
046947310
ABSTRACT:
A load responsive system including individual positive and negative load compensators, for control of positive or negative load and an external logic system for determination of whether the controlled load pressure is positive or negative. The deactivating valve deactivates the positive load compensator, when the negative load pressure exceeds a certain minimum predetermined level, preventing flow of fluid from the system pump to the system actuator controlling a negative load at a pressure higher than a certain predetermined level, and therefore preventing development of excessive pressure in the actuator, while also deactivating the negative load compensator below a certain minimum predetermined negative load pressure level and while the positive load is being controlled by the positive load compensator.
REFERENCES:
patent: 3744517 (1973-07-01), Budzich
patent: 4222409 (1980-09-01), Budzich
patent: 4488474 (1984-12-01), Budzich
Burrows J. W.
Caterpillar Inc.
Michalsky Gerald A.
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