Patent ID: 7513048
Filing Date: 2009-04-07
Classification: B23B,B23D

Abstract:
1. A chain saw hand drill apparatus characterized as an attachment piece to a hand drill, which, through a shaft system, conical gears and pinion, moves the chain saw mechanism, also provided with a handle, the apparatus further characterized as a gearbox having lids, wherein the gearbox includes the conical gears comprising first and second bevel gears, the first bevel gear mounted to a shaft connected to the pinion, with a second bevel gear mounted to a shaft adapted to connect to the hand drill, the second bevel gear disposed between the pinion and the first bevel gear, wherein a pinion shield configured to cover the pinion is disposed opposite the first bevel gear and presses on the lids of the gearbox so as to press the first bevel gear against the second bevel gear for better power transmission.