Magna Powertrain Inc

Tesma International, Inc.

Ryszard Ostrowski

Zdenek Cerny

Dejan Vukojicic

Norman Cerny

Fritz Winkler

Zoran Ivovic

Peter Depikolozvane

An electromagnetic clutch includes an electromagnetic coil positioned within a coil housing. A pulley rotates relative to the housing and the coil. A shaft is rotatably supported by the housing. A hub plate is fixed for rotation with the shaft. A floating element is positioned between the pulley and the hub plate. An elastomeric ring is mounted between the pulley and the floating element and provides a driving connection therebetween. The elastomeric ring is sized to urge the floating element into frictional driving engagement with the hub plate and is compressible during energization of the coil to decouple the floating element from the hub plate.

Reverse clutch for rotatable inputs

An electromagnetically actuated power transmitting assembly has a cup shaped pulley structure mounted for rotation about the input shaft of a power driven device. The pulley structure has an outer annular driven portion for engaging an endless flexible driving element such that engine driven movement of the driving element rotates the pulley structure. The outer annular portion has ferromagnetic material along at least an internal diametrical periphery thereof to allow magnetic flux to flow therethrough. A one-piece flux carrier/mounting structure is formed from ferromagnetic material and has a mounting portion fixedly mounted to the power driven device and an annular flux carrier portion nested within the cup shaped pulley structure to allow the pulley structure to rotate relative to the flux carrier and to allow magnetic flux to flow therebetween. An annular magnetic coil for inducing a field of magnetic flux is fixedly mounted in the carrier portion. A selectively movable clutch has a magnetically attractable disc portion and a biasing member biasing the disc portion to a disengaged position. The clutch is mounted such that energizing the coil induces a magnetic flux which overcomes the bias and selectively moves the disc portion from the disengaged position to an engaged position wherein the clutch couples the pulley structure and the input shaft for rotation. De-energizing the coil enables the biasing member to move the disc portion to the disengaged position de-coupling the pulley structure the input shaft to allow the pulley structure to rotate relative thereto.

Electromagnetically actuated power transmitting assembly

Growing community of inventors

Mississauga, Canada

Ryszard Ostrowski