Patent ID: 6688442
Filing Date: 2004-02-10
Classification: F16D

Abstract:
A power transmission device comprising an input shaft to which the turning torque of an engine is transmitted, an annular output shaft mounted coaxially with said input shaft for transmitting the turning torque transmitted from said input shaft to a vehicle wheel side, a control type slip clutch mounted between said input shaft and said output shaft for engaging said input shaft and said output shaft together while producing slip, a mechanical type control type two-way clutch using engaging elements for engaging said input shaft and said output shaft together after said control type slip clutch has been engaged, and a one-way clutch provided between said output shaft and a stationary member provided radially outside of said output shaft for engaging said output shaft with said stationary member to lock said output shaft when a turning torque in an opposite direction to the rotating direction of the engine is transmitted to said output shaft from the vehicle wheel side, wherein said control type slip clutch and said control type two-way clutch are controlled by hydraulic pressure.