| 摘要 |
In one embodiment of this invention, an open-end type adjustable wrench (10) has a head portion (14) with a fixed jaw (16), fixed jaw guide (20) and a movable jaw (30). Two contact points (36, 48) are fixed to the movable jaw (30) and act on the guide (20) to hold the movable jaw (30) in position. In another embodiment of this invention, the open-end type adjustable wrench (110) includes a wedge element (140), a head portion (114) with a fixed jaw (116) and a solid jaw guide (120) that prevents slippage of the movable jaw (130) and relative movement between the two jaws (116, 130). The action of the movable jaw (130) on the wedge (140) via a tension member (128) that passes through or straddles the jaw guide (120) pulls the wedge towards the jaw guide (120) placing the jaw guide (120) in compression and keeps the movable jaw (130) in place. |
