| 摘要 |
A tool of the type having an active member (20) adapted for movement from a rest position to an operative position to perform a selected action and actuating means (11) associated with the active member (20) and including a driven member (23) co-acting with the active member (20). The driven member (23) is operable to displace the active member (20) to the operative position and the actuating means (11) includes wedge means (25) and driving means (50, 51, 52) for reciprocating the wedge means (25). Preferably the driving means (50, 51, 52) comprises a fluid operated actuator, such as a hydraulic actuator and preferably, an electrically operated hydraulic pump is incorporated into the tool. Preferably, the tool is a hand tool (10) having a pair of jaws (20) at least one of which is moveable to or from the other and actuating means (11) for actuating the or each moveable jaw (20), the actuating means (11) including a follower (23) associated with the or each jaw (20) and a fluid operated ram (50, 51, 52) adapted to displace the or each follower (23) laterally of the ram axis so as to move at least one jaw (20) to the other. Preferably the follower (23) cooperates with the ram (50, 51, 52) in such manner that it may be retracted from an actuated position by reverse operation of the ram. |
