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    • 4. 发明申请
    • IMPROVED ADJUSTABLE BOX WRENCH
    • 改进的可调节手柄扳手
    • WO1998031508A1
    • 1998-07-23
    • PCT/US1997020339
    • 1997-11-04
    • BOYD, Bill, E.BOYD, William, D.
    • B25B13/16
    • B25B13/14B25B13/16
    • An improved adjustable box wrench having a mouth (9) with a plurality of gripping surfaces (27, 31, 32) for surrounding a nut, bolt or the like. A movable jaw (5) allows the size of the mouth to be altered when a worm screw (8) is turned. The worm screw (8) has gear (24) which fit between teeth (20) in an arm (4) extending from the movable jaw (5). The adjustment arm (4) and worm screw (8) fit into cavities (14, 17) in the wrench body (1). Increased lateral support for the movable jaw is provided by protrusions (19) on each side (21) of the jaw which fit into and move longitudinally within channels (26) in fixed gripping surfaces (32) on opposite sides of the mouth (9). A removable closure plate (6) covers the adjustment arm (4) and the worm screw (8) and facilitates assembly of the wrench and disassembly for repair or other purposes.
    • 一种改进的可调式盒式扳手,其具有带有多个用于包围螺母,螺栓等的多个夹紧表面(27,31,32)的口部(9)。 当可旋转的蜗杆(8)转动时,活动夹爪(5)允许改变口腔的尺寸。 蜗杆(8)具有装配在从可动夹爪(5)延伸的臂(4)中的齿(20)之间的齿轮(24)。 调节臂(4)和蜗杆(8)装配在扳手主体(1)中的空腔(14,17)中。 对于可动钳口的增加的侧向支撑由钳口的每一侧(21)上的突起(19)提供,所述突起(19)在口(9)的相对侧上的固定抓握表面(32)中的通道(26)内纵向配合并纵向移动, 。 可拆卸的封闭板(6)覆盖调节臂(4)和蜗杆(8),并且便于组装扳手和拆卸以进行修理或其它目的。