| 摘要 |
A handheld device for rotating a drive shaft including a housing comprising a handle extending from a gear housing; a first shaft that extends rotatably through the housing; a first drive gear secured to the first shaft; a trigger pivotably connected to the first shaft to position the trigger adjacent to the handle, wherein the movement of the trigger rotates the first shaft and first drive gear; a second shaft gear in contact with the first drive gear and supported on a second shaft that extends rotatably through the housing; a second drive gear positioned on the second shaft; a third shaft gear in contact with the second drive gear and supported on a slidable third shaft that extends rotatably through the housing and is slidable in the housing and the third shaft gear remains in contact with the second drive gear when slid and a third forward gear attached to the slidable third shaft on one side of the third shaft gear; a third reverse gear attached to the slidable third shaft on the other side of the third shaft gear; |
