Spring coupler brake

192 clutches and power-stop control – Vortex-flow drive and clutch – With brake

Patent

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Details

192 12BA, F16D 5104, F16D 6514

Patent

active

046518541

ABSTRACT:
A spring coupler including a drive member, a driven member, a pair of coil springs interconnecting the drive and driven members, and a cylindrical housing providing a unidirectional drive either clockwise or counter-clockwise. The drive member has a pair of recesses in its outer surface and the driven member has a pair of substantially complementary projections, the projections and recesses interacting upon the assembly of the members to form a substantially cylindrical surface. The coil springs are coiled serially about the assembled members and the outer surfaces of the springs are frictionally engaged with the inner surface of the housing in the relaxed condition of the springs. Tangs on one end of each of the springs are inserted into individual ones of clearances between the projections and an edge of the recesses and the tangs on the other ends of the springs are inserted into slots in the projections. When the drive member is turned clockwise or counter-clockwise an edge of one of the recesses engages one of the tangs to tighten its spring and break the frictional engagement with the housing. The interaction of the other tang of the tightened spring with the slot in the projection in the other recess causes the inserted tang of the other spring to tighten its spring so as to release the frictional engagement of both springs to allow rotation of the drive and driven members. On the other hand, any counterrotations of the driven member leaves one spring in frictional engagement with the housing.

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