Abstract: A bearing support assembly for supporting a bearing of an electric motor output shaft relative to a housing. The bearing assembly includes a rigid cap that receives the bearing and resilient boot disposed in the cap between the bearing and cap inner surface. The cap has an irregularly shaped outer surface that interfaces with housing structures to permit the small motions over five degrees of freedom. The bearing support assembly permits self-alignment of the bearing with respect to the motor output shaft and also permits adjustment of natural frequencies of the system that includes the motor, the bearing and the housing. As a result, an improved response to mass unbalances and external loads is achieved.

Abstract: A hand-held rotary power tool includes a housing that provides a manual grip zone that is grasped by the user during operation of the tool. The housing includes a switch opening that overlies an electrical switch that controls operation of a tool motor. The tool includes a switch actuator that is disposed in tool housing so as to be accessible to a user of the tool via the switch opening and is operable to control the position of the switch. The switch actuator is configured to damp tool noise and transmission of tool vibration to the tool housing.

Abstract: A hand-held rotary power tool includes a housing that provides a manual grip zone that is grasped by the user during operation of the tool. The housing includes a switch opening that overlies an electrical switch that controls operation of a tool motor. The tool includes a switch actuator that is disposed in tool housing so as to be accessible to a user of the tool via the switch opening and is operable to control the position of the switch. The switch actuator is configured to damp tool noise and transmission of tool vibration to the tool housing.