Patent ID: 8375829
Filing Date: 2013-02-19
Classification: B25B

Abstract:
1. A wrench comprising: a handle; a yoke; a shaft comprising a first section securely connected to the handle and a second section rotationally inserted in the yoke; a head pivotally connected to the yoke; a in comprising a first end inserted in the yoke and a second end inserted in the head; and an axle comprising a first end inserted in the yoke and a second end inserted in the head; a mandrel inserted through the head; a first transmitting unit for transmitting a small torque to the mandrel from the handle spun relative to the yoke, wherein the first transmitting unit includes a toothed wheel securely provided around the mandrel and engaged with the axle; and a second transmitting unit in cooperation with the first transmitting unit to transmit a large torque to the mandrel from the handle pivoted together with the yoke, wherein the second transmitting unit includes a toothed wheel engaged with the toothed wheel of the first transmitting unit and non-rotationally connected to the head.