F - Mech Eng,Light,Heat,Weapons – 15 – B
Patent
F - Mech Eng,Light,Heat,Weapons
15
B
138/78
F15B 9/17 (2006.01) E02F 9/22 (2006.01) F15B 11/028 (2006.01) F15B 11/05 (2006.01) F15B 21/08 (2006.01)
Patent
CA 1113834
APPLICATION OF: Leslie J. Kasper FOR: LOAD SENSING CONTROL FOR HYDRAULIC SYSTEM A B S T R A C T A load sensing hydraulic system is disclosed of the type in which a load signal is communicated from down- stream of a main flow control orifice to a device which is operable to vary the fluid delivery rate in response to changes in the load signal. Disposed in the load signal conduit is a load signal modulating valve which, in one position, communicates the load signal, substan- tially unchanged, to the variable fluid source. In another position of the modulating valve, the load sig- nal chamber of the variable fluid source is drained to tank, while in intermediate positions of the modulating valve, a portion of the load signal is communicated to the variable fluid source, and a portion is bled to tank. Modulation of a load signal permits flow control in an hydraulic system, independent of the position or move- ment of the main spool valve. The input to the modu- lating valve may be manual or electric, and if electric, may be remote, or may be automatic in response to certain predetermined system conditions.
335849
Corporation Eaton
Macrae & Co.
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