POWER TRANSMITTING DEVICE

摘要

PROBLEM TO BE SOLVED: To surely prevent damage caused by an abnormal generation of heat. SOLUTION: In each temperature sensitive valve 80, a valve element 81 is displaced to the downward direction in the figure through a piston pin 85 with resisting to energizing force of a spring member 82 with accompanied by heat expansion of wax when the wax of a wax element 83 reaches at a specified temperature or higher, and a release channel is opened. A pressure in a pressure chamber 31 is decreased by opening the release channel to decrease a temperature of a pump housing 30.