Rotational phase adjuster

摘要

In a rotational phase adjusting apparatus for adjusting a difference in rotational phase between first and second elements (1, 2) by controlling an engagement therebetween through a third element (5) whose condition is set by a movement of a fourth element (7),
    an elastic member (13) is arranged between the fourth element and the one of the first and second elements, and a brake (8, 9, 10) generates a variable braking force to be applied to the fourth element so that a rotational positional relationship between the fourth element and the one of the first and second elements and a value of a force applicable from the fourth element to the third element are elastically variable in accordance with a value of the variable braking force.