Patent ID: 8434564
Filing Date: 2013-05-07
Classification: B23B,B25F

Abstract:
1. A power tool comprising: a housing defining a handle; a motor received in the housing; a trigger mounted to the handle and coupled to the motor, the trigger being adapted to control operation of the motor in response to an input provided by an operator of the power tool by coupling the motor to a source of power; an output member; a multi-speed transmission coupling the motor and the output member, the multi-speed transmission comprising a planetary stage with a planet carrier, a plurality of compound planetary gears, a first ring gear and a second ring gear, the planet carrier having a carrier body and a plurality of pins that are fixed to the carrier body, each of the compound planetary gears being rotatably mounted on an associated one of the pins, each of the compound planetary gears having a first planet gear, which is meshingly engaged to the first ring gear, and a second planet gear that is meshingly engaged to the second ring gear and coupled to the first planet gear for common rotation; wherein the pins are spaced circumferentially about the carrier body such that each pair of adjacent pins is spaced apart by a spacing angle, and wherein at least two different spacing angles are employed to space the pins about the carrier body.