A linear link selectively providing for lost motion

摘要

A linear link (1) is provided which comprises an inner (6) and an outer (5) telescopically movable pair of members in which a catch arrangement (19) is operative between formations (20) (23) on the two members to selectively lock them in one particular telescopic position, or to allow them to move telescopically, thereby providing for a limited and optionally adjustable degree of lost motion between the ends (7) (27) of the linear link. A co-axial solenoid (17) carried by the outer member (5) controls the catch arrangement (19) to provide selectively for rendering it operative or not according to whether or not the solenoid is energised. The linear link may be lockable in either its maximum or minimum degree of telescopic extension.