Safety coupling

Details Safety coupling Safety coupling

1982-06-15

1984-09-11

Krizmanich, George H.

192 clutches and power-stop control

Vortex-flow drive and clutch

With brake

188167, B60K 4120

Patent

active

044704909

ABSTRACT:
A safety coupling for rapidly stopping a cutting tool or the like upon the de-energization of a driving motor includes an axially movable shell rotating together with a driven shaft and having a flange pressed by a spring toward a frictional braking element. Two parallel cams of generally triangular outline are articulated by their respective vertices to a drive shaft and, in a central position, are aligned with a common axis of the drive and driven shafts. On starting the motor, the resulting differential torque causes a relatively inverse tilting of the cams around a transverse axle whereby they axially shift the shell, against the force of the spring, and release its flange from the braking element. As soon as the motor is cut off, the differential torque vanishes and the cams regain their initial central position whereby the driven tool is arrested.

REFERENCES:
patent: 2997146 (1961-08-01), Chiolerio
patent: 3667578 (1972-06-01), Johnson
patent: 3680672 (1972-08-01), McCurley

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