192 clutches and power-stop control – Clutches – Torque responsive
Patent
1978-04-26
1981-01-20
Krizmanich, George H.
192 clutches and power-stop control
Clutches
Torque responsive
192 85A, F16D 4321, F16D 1900
Patent
active
042457297
ABSTRACT:
A safety shaft coupling member for coupling together two coaxial shafts and ncorporating an overload safety device, which causes complete interruption of the transmission of torque when an acceptable maximum torque is exceeded, comprises a hub sleeve which is adapted to be fixed to a driven shaft, and a cup-shaped assembly in which the hub sleeve is freely rotatably mounted and is capable of limited axial displacement. The hub sleeve and the cup-shaped assembly have concentric toothed end faces situated in a common plane extending normal to the axis of rotation of the coupling member, and a first annular piston has two annular sets of teeth arranged to mesh with the toothed end faces. This first annular piston is extensible against the force of a restoring spring out of a liquid pressure device which is fixed either to the sleeve or to the cup-shaped assembly, and a second annular piston is also extensible against the force of a restoring spring in a direction opposite to that of the first annular piston out of the liquid pressure device to press against an end face of the cup-shaped assembly or the sleeve, whichever does not have the liquid pressure device fixed to it. Extension of both the pistons engages the teeth of the first piston to the two toothed end faces and so transmits torque from the hub sleeve to the cup-shaped assembly, but release of the liquid pressure in the device causes the first piston to be retracted and interrupt the transmission of torque.
REFERENCES:
patent: 2428336 (1947-09-01), Munschauer
patent: 3298488 (1967-01-01), McDonald
patent: 3807539 (1974-04-01), Reed
Lunke Manfred
Walter Jurgen
Krizmanich George H.
Vulkan Kupplungs-und Getriebebau Bernhard Hackforth GmbH & Co. K
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