F - Mech Eng,Light,Heat,Weapons – 16 – D
Patent
F - Mech Eng,Light,Heat,Weapons
16
D
F16D 23/12 (2006.01) F15B 13/044 (2006.01) F16D 13/40 (2006.01) F16D 27/04 (2006.01) F16K 31/02 (2006.01)
Patent
CA 2309566
A clutch arm centering device is disclosed. The device is mounted on a clutch using to operate piston valves on a crane or other heavy machine. The piston valves may be operated using a valve arm which has two operative positions and a neutral position between the two operative positions. A clutch arm of the clutch is linked to valve arm to allow the valve arm to be manipulated by a remote control coupled to the clutch. As parts of the linkage between the clutch arm and the valve arm wear, the centering device biases the clutch arm to a central position which corresponds to the neutral position of the valve arm, thereby avoiding problems of understroking and overstroking which arise in the prior art. One embodiment of the centering device employs a linear spring to ensure that the clutch arm does not sag due to gravity when the linkage wears. A second embodiment employs a helical spring which actively biases the clutch arm to its central position from two opposing directions. The second embodiment is suitable for use with a clutch mounted in any orientation.
Dimopoulos William
Parr Robert
Sood Sanjay
Atlas Polar Company Limited
Bereskin & Parr Llp/s.e.n.c.r.l.,s.r.l.
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