Fluid handling – Systems – Supply and exhaust
Patent
1993-04-06
1994-04-26
Michalsky, Gerald A.
Fluid handling
Systems
Supply and exhaust
60427, 60452, 91446, 91518, 13759613, F15B 1308
Patent
active
053057899
ABSTRACT:
A pressure compensating hydraulic directional valve comprising: a body provided with a movable slide; a passage through the body for connecting a distribution chamber associated with the slide to working orifices, the distribution chamber being selectively connectable to an admission orifice by the slide when moved; a load sensing line channel combined with means for selecting the maximum pressure selected from the pressure in the channel and the pressure of the fluid in the valve; and pressure compensating means placed in the passage and responsive to the difference between the pressure in the passage and the pressure in the channel to generate a fixed pressure drop in the pressurized fluid flowing through the passage towards the working orifices, the pressure compensating means being combined with the maximum pressure selecting means in such a manner that if the pressure in the channel is greater than or equal to the pressure of the fluid from the slide, then no communication exists between the passage and the channel and the pressure in the channel retains its value, or else, if the pressure in the channel is less than the pressure of the fluid from the slide, communication is established between the passage and the channel, and the pressure in the channel becomes the same as the pressure of the pressurized fluid.
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Michalsky Gerald A.
Rexroth-Sigma
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