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    • 2. 发明授权
    • Rear ratchet drive multiple bit tool
    • 后棘轮驱动多位工具
    • US5894765A
    • 1999-04-20
    • US744794
    • 1996-11-05
    • Wayne AndersonWarren AndersonPaolo Cassutti
    • Wayne AndersonWarren AndersonPaolo Cassutti
    • B25B15/02B25B15/04B25F1/02B25G1/08B25B13/46
    • B25B15/02B25B15/04B25F1/02B25G1/085
    • A ratcheting tool, such as a screwdriver having multiple reversible bits in which a ratchet assembly is located in the screwdriver handle closer to the rear end of the handle, being the end opposite the screwdriver shank. Extending from the ratchet in a direction toward the shank, but at least partially within the handle, is a ratchet drive tube having an interior cross-section which is hexagonal. The screwdriver shank is a tube with both ends,having hexagonal interior cross-sections into which interchangeable double-ended drive bits with mating hexagonal shoulders may be partially inserted, with a portion of each hexagonal shoulder remaining exposed. The exposed portion of the hexagonal shoulder opposite the bit selected for use is inserted into the mating hexagonal ratchet drive tube. Driving rotation of the handle is transmitted to the selected bit in use through the ratchet and ratchet drive tube to the shoulder of the unselected bit, to the screwdriver shank and to the shoulder of the selected bit. Each double-ended bit may be reversed in the shank and the shank may be reversed in the ratchet drive tube. Means are provided in a modified embodiment to restrain the ratchet from being pushed out of the handle under applied force of use.
    • 棘轮工具,例如具有多个可逆位的螺丝刀,其中棘轮组件位于更靠近手柄的后端的螺丝刀手柄中,是与螺丝刀柄相对的端部。 从棘轮向着柄的方向延伸,但是至少部分地在手柄内延伸,是具有六边形内部横截面的棘轮驱动管。 螺丝刀柄是具有两端的管,其具有六边形内部横截面,可互换的具有配对六边形肩部的双头驱动钻头可以部分地插入,每个六角形肩部的一部分保持暴露。 将六边形肩部与被选择使用的钻头相对的暴露部分插入到配合的六角棘轮驱动管中。 手柄的驱动旋转通过棘轮和棘轮驱动管被传送到使用中的选定的钻头到未选择的钻头的肩部,螺丝刀柄和所选钻头的肩部。 每个双头钻头可以在柄中反转,并且柄可以在棘轮驱动管中反转。 在改进的实施例中提供了用于限制棘轮在施加的使用力下被推出手柄的装置。