F - Mech Eng,Light,Heat,Weapons – 16 – F
Patent
F - Mech Eng,Light,Heat,Weapons
16
F
267/80
F16F 9/50 (2006.01) F16F 9/46 (2006.01)
Patent
CA 1223898
D-7,363 C-3530 PRESSURE BALANCED VALVE FOR ADJUSTABLE HYDRAULIC DAMPER Abstract of Disclosure To assure adjustability under all internal pressure conditions a hydraulic damper having a hollow piston rod, a piston on the end of the rod slidable in a fluid filled tube and cooperating with the latter in defining inversely variable volume compression and rebound chambers, and at least two relief valves on the piston connected to the com- pression chamber for passing fluid thereto at two different levels of pressure relief, includes a right cylindrical valve spool in the piston rod bore rotatable between a plurality of control positions corresponding to pressure relief at the different relief pressure levels, first passages between the rebound chamber and the piston rod bore, second passages between each of the relief valves and the piston rod bore, first circumferentially symmetri- cally arrayed ports in the valve spool registerable with the first passages to always connect the rebound chamber to the valve spool, second circum- ferentially symmetrically arrayed ports in the valve spool to selectively connect respective ones of the relief valves to the valve spool, and a hollow tube through the valve spool open to the compression chamber to equalize pressure on opposite ends of the valve spool.
454297
General Motors Corporation
Gowling Lafleur Henderson Llp
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