.~.~.~.~> Including unidirectionally rotating screw
DEFINITION
Classification: 188/71.8
(under subclass 71.7) Apparatus wherein the altering means operates without manual intervention of a user of the apparatus.
(1) Note. In this and the indented subclass the actuator itself is moved to approximately the same degree during application of the brake element (i.e., toward the disc) as during retraction of the element (i.e., away from the disc) but a connection between the actuator and the element permits a lesser degree of movement during retraction than during application.
(2) Note. In this subclass (71.8) many patents disclose a connection having differential friction between two elements; that is, friction between two elements causes them to slide together at the same rate in one direction of mutual movement but permits them to slip, one with respect to the other, in the opposite direction of mutual movement.
