The present invention provides a ratchet one-way clutch comprising inner
and outer races disposed on a same axis and in which a pawl member as a
torque transmitting member and a biasing member for biasing the pawl
member are provided in one of the inner and outer races and a recessed
portion into which the pawl member is fitted is provided in the other of
the inner and outer races and a damper spring is provided on an outer
periphery of the outer race and wherein an inner surface of a spring
pocket for containing the damper spring has a shape complementary to a
shape of the damper spring.