Patent ID: 8683704
Filing Date: 2014-04-01
Classification: B23D,B25F,B26D

Abstract:
1. A power tool comprising: a pipe holder; a knife pivotally coupled to the pipe holder; a drive mechanism coupled to at least one of the pipe holder and the knife at a pivot point, the drive mechanism operable to provide a driving force at the pivot point to move the at least one of the pipe holder and the knife relative to the other of the pipe holder and the knife, wherein the at least one of the pipe holder and the knife is operable to pivot through an angle toward the other of the pipe holder and the knife during a cutting motion, and wherein the at least one of the pipe holder and the knife is operable to pivot through the angle away from the other of the pipe holder and the knife during a return motion; a motor coupled to the drive mechanism; and a power supply electrically coupled to the motor to selectively power the motor for operating the drive mechanism, wherein the drive mechanism includes a gear assembly coupled to the at least one of the pipe holder and the knife to move the at least one of the pipe holder and the knife relative to the other of the pipe holder and the knife, wherein the gear assembly includes a planetary gear reduction coupled to the knife to move the knife relative to the pipe holder, and wherein the planetary gear reduction includes an outer ring, and wherein the drive mechanism includes a lock key operable to engage the outer ring to inhibit rotation of the outer ring relative to pipe holder, and an actuator movable relative to the lock key to disengage the lock key from the outer ring to allow rotation of the outer ring relative to the pipe holder.