192 clutches and power-stop control – Clutch and brake
Patent
1974-08-26
1976-09-07
Wyche, Benjamin W.
192 clutches and power-stop control
Clutch and brake
192 81R, F16D 6702
Patent
active
039789470
ABSTRACT:
A clutch-brake assembly includes input and output hubs, respectively, fixed and journaled on a rotatable shaft. A coil spring secured for movement with the output hub normally is wound into driving engagement between the input and the output hubs. A sleeve telescoped over the spring is fixed to the output hub and a low inertia braking member loosely mounted on the free end of the sleeve is held against substantial movement in both radial and axial directions with respect to the sleeve. In one form of the invention, a tang on the spring projects into a slot in the braking member and thus connects the member with the spring so the member normally rotates with the shaft but, when a braking torque is applied to the member, the spring is unwound from between the two hubs to disengage from them and subsequently to transmit the braking torque to the output hub to retard rotation thereof. In another form of the invention, a tang is integrally formed with the braking member to engage the input end of the spring. Intermediate the ends of the first convolution of the input end of the spring, a bend extends axially outward to hold the braking member normally away from the input end of the spring. When the braking member is pushed toward the spring during braking, the input end of the spring rocks outwardly to engage with the tang so the spring is unwound from the hubs by relative rotation between the braking member and the output hub.
REFERENCES:
patent: 2298970 (1942-10-01), Russell
patent: 2475432 (1949-07-01), Marihart
patent: 2577181 (1951-12-01), Christensen
patent: 3349880 (1967-10-01), Baer
patent: 3572481 (1971-03-01), Moritz
patent: 3837450 (1974-09-01), Malion et al.
Warner Electric Brake & Clutch Company
Wyche Benjamin W.
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