Patent ID: 8960323
Filing Date: 2015-02-24
Classification: B23D,B25F,Y10T

Abstract:
1. A handheld electrical power tool comprising: a housing forming a first grip configured to engage one hand of an operator and a second grip configured to engage another hand of the operator; an electrical motor located in the housing that is configured to drive a tool; a foot member outside the housing that is configured to engage a work piece and support the housing and the electrical motor with reference to the work piece; a movable member operatively connected to the housing and to the foot member, the movable member being configured to move from a first position to a second position in response to a movement of the foot member toward the housing and to move from the second position to the first position in response to a movement of the foot member away from the housing; a vibrational dampener positioned proximate to the foot member and operatively connected to the movable member, the vibrational dampener including a variable rheological material; and a controller located in the housing and operatively connected to the vibrational dampener, the controller being configured to selectively activate an electric current to adjust a mechanical resistance of the variable rheological material to dampen vibrational forces transmitted to the first grip and the second grip during operation of the electrical motor.