Patent ID: 6176322
Filing Date: 2001-01-23
Classification: B25F,Y10T

Abstract:
A power tool system comprising:a tool body having a housing, a motor mounted in the housing, and an activation switch mounted in the housing for controlling the motor, the motor including a rotary output; anda plurality of interchangeable tool heads each for connection with said body so as to engage with said motor output;said tool body having a substantially cylindrical tool head opening and an orientation aperture extending downwardly along a perpiphery of said opening and having a releasable lock-off mechanism which restrains actuation of said activation switch when none of the tool heads of the plurality are connected to the body; andeach tool head of the plurality including actuating means to engage with and de-activate said lock-off mechanism when a tool head of the plurality is connected to said body to allow actuation of said switch;said actuating means comprises a head projection on each of the tool heads of the plurality to be received at least partially in a complimentary fit in said orientation aperture in said tool body so as to orientate each tool head of the plurality in a predetermined orientation to said body when connected thereto to prevent reaction rotation when one of the plurality of interchangeable tool heads is under load; andsaid lock-off mechanism being externally accessible through said orientation aperture to allow said actuating means to engage therewith when inserted into said orientation aperture.