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freepatentsonline.com: Clutches and power-stop control


Solenoid clutch coupling
To prevent coupling breakage between an elastic body and an outer ring due to friction heat of an armature and a rotor, an solenoid clutch coupling is provided with an elastic body ( 3 ) elastically coupling a hub ( 10 ) attached to a rotation shaft ( 6 ), and an outer ring ( 20 ) coupled to an armature ( 5 ) solenoidally moved close to and apart from a rotor ( 4 ), a sleeve ( 40 ) buried in an outer peripheral portion of the elastic body ( 30 ), a fit layer ( 32 ) constituted by a part of the elastic body ( 30 ) in an outer peripheral side of the sleeve ( 40 ) and attached to an inner peripheral surface of the outer ring ( 20 ), and non-cylindrical surfaces ( 21 a ) engaging with the fit layer ( 32 ) in a circumferential direction, and axial stoppers ( 23, 24 ) to an outer periphery of the elastic body ( 30 ) in a sleeve ( 21 ) of the outer ring ( 20 ).

Friction clutch assembly having a spiral snap ring friction liner retention device
A friction clutch assembly for use in an on/off fan drive is provided having a simplified method for retention of the friction liner between the clutch housing and rotating drive shaft. The friction clutch assembly introduces a groove within the inner rearward portion of the clutch housing. A spiral snap ring is installed into the groove to retain the friction liner between the clutch housing and rotating drive shaft. The spiral snap ring functions to axially retain the friction liner between the clutch housing and rotating drive shaft during use.

Dog clutch and method for overdrive
A hydraulically-actuatable clutch and method is operable as an overdrive clutch in a transmission system having a transmission main shaft portion. The clutch is engageable between a transmission housing and a sun gear and rotor hub to provide for grounding of the sun gear and rotor hub to the transmission housing. The clutch may either be engaged or disengaged from the transmission housing. The clutch does not allow the rotor and sun gear to rotatably slip with respect to the transmission housing when the clutch is engaged to ground the rotor and sun gear to the transmission housing. When the clutch is disengaged, the rotor and sun gear may rotate with the transmission main shaft portion.