Bi-directional grip mechanism for a wide range of bore sizes

摘要

A linkage apparatus for selectively gripping and releasing the inside walls of a conduit, the apparatus comprising: a first arm (33); a bi-directional gripping cam (70) rotatably attached to the arm; and an extension and locking device (36,8) adapted to selectively radially extend the arm from a tool housing (60) to an inside wall of a conduit and adapted to selectively lock the arm in an extended position. IMAGE