Patent ID: 7980325
Filing Date: 2011-07-19
Classification: B24B,B25F,B27B,Y10T

Abstract:
1. A locking mechanism for a rotary power tool of the type having a main motor housing having a rotatable armature shaft with a non-circular configured portion, an end casting attached to the motor housing, the end casting having openings in the outer wall on opposite sides thereof, said locking mechanism comprising: an elongated locking member having first and second end portions, and being retained within at least one of the motor housing and the end casting and being slideable in a full range of movement between unlocking and locking positions; said locking member first end portion extending outwardly through one of the openings and being accessible by a user to move said locking member to said locked position wherein said second end portion extends through the other of the openings, said locking member having a locking portion intermediate said first and second end portions that is configured to engage the non-circular configured portion of the rotatable armature shaft and prevent rotation thereof when said locking member is in its locking position; and a biasing element configured to apply a biasing force to said first end portion to bias said locking member through its full range of movement toward said unlocking position.