Patent ID: 9546692
Date: 2017-01-17
CPC Classifications: F16D,F16H,G01L,Y10T

Claim:
1. A torque transmitting apparatus comprising: a ferromagnetic shaft having an axis of rotation and an outer surface; an elongate, axially extending keyway having a floor of pre-determined depth formed in said surface; a ferromagnetic key magnetically held in the keyway and of a height greater than the depth of said floor so as to extend radially outwardly beyond said outer surface; an annular coupling having an axial through bore with an interior surface dimensioned to receive said shaft therein; and an elongate axially extending keyway substantially identical to the keyway in said shaft formed in said interior surface such that the shaft keyway and the coupling keyway can be aligned, the ferromagnetic key being disposed in both the shaft keyway and the coupling keyway thereby to create a torque transmitting couple between said shaft and said coupling.