F - Mech Eng,Light,Heat,Weapons – 16 – K
Patent
F - Mech Eng,Light,Heat,Weapons
16
K
F16K 31/06 (2006.01) F15B 13/04 (2006.01) F15B 13/044 (2006.01) G05D 16/20 (2006.01)
Patent
CA 2322366
A variable force solenoid operated pressure control valve for controlling an hydraulically operated actuator in a fluid pressure circuit. The valve has a spool in a straight spool bore with fluid pressure chambers at opposite ends. One spool end has a rod press fitted therein with the rod extending through the fluid pressure chamber and operatively contacting the solenoid armature. The rod creates an area differential on the spool ends for providing an axial spool force proportional to the pressure in the fluid chambers which are each connected by a metering passage in the spool to a recess on the spool which is continuously connected to a control pressure port. A supply port is connected to the recess by a first valuing land on the spool and an exhaust port is connected to the recess by a second valuing land on the spool. The metering passages serve to attenuate transients.
Borden Ladner Gervais Llp
Corporation Eaton
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