F - Mech Eng,Light,Heat,Weapons – 15 – B
Patent
F - Mech Eng,Light,Heat,Weapons
15
B
138/91
F15B 15/20 (2006.01) G05D 3/12 (2006.01)
Patent
CA 2010416
ABSTRACT The invention relates to a method and an arrangement for positioning accurately the piston of a load-carry- ing pressure-fluid piston-cylinder device, in which the fluid is a compressible gas and the cylinder device is double-acting. A variable operating pressure (P1) acts on one side of the piston (2), and an applied pressure (P2) of constant value acts on the other side of the piston (2). The pressures (P1,P2) can be relieved alternately by evacuation, for movement of the piston in the cylinder device (1). The invention is charac- terized by a pressure regulator (12) which functions to detect the load acting on the cylinder device (1) from an external load (F) and which includes a pressure chamber (12') having a movable wall (13,13') supporting the cylinder device (1), and in which the operating pressure (Pi) is applied via a valve (17,18), the opening and closing movements of which are determined by movements of the movable wall (13,13'). (Figure 1)
Gowling Lafleur Henderson Llp
Hugdahl Mats
LandOfFree
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