Charles D Hopkins

US Patent:

41612426, Jul 17, 1979

Filed:

Jun 15, 1977

Appl. No.:

5/806907

Inventors:

Robert G. Moores - Reisterstown MD
Charles E. Hopkins - Baltimore MD

Assignee:

Black & Decker Inc. - Newark DE

International Classification:

B23B 2100
F16D 1100

US Classification:

192 34

Abstract:

A power-driven drill and screwdriver includes a housing and a drive motor mounted in the housing. A case is attached to the housing and has a spindle bearing mounted therein. A first clutch is rotatably mounted in the case axially of the bearing and is operatively connected to the drive motor. An output spindle is journalled in the bearing and has a flange formed thereon. A second clutch is formed on the flange so as to be adjacent the first clutch. The output spindle is slideably mounted in the bearing so as to cause the second clutch to be movable relative to the first clutch between a first location whereat the second clutch firmly engages the first clutch and a second location whereat second clutch is disengaged from the first clutch. A spring resiliently biases the second clutch into the second location. An eccentric member is journalled in the case and is rotatable from one position corresponding to the screwdriving mode of the tool to another position corresponding to the drill mode of the tool.