A ROTARY TO RECIPROCATING MOTION CONVERSION ATTACHMENT FOR A POWER ROTARY HAND TOOL

WIPO Patent Application WO2005110653

A3

A preferred embodiment of a rotary tool reciprocating motion conversion attachment for a rotary power hand tool is described which is configured to be attached to a nose portion of the hand tool housing. The attachment has a rotary drive train (60) in a housing (12) that is connectable to the output shaft of the hand tool, the drive train driving a barrel cam having an exterior cam groove (134). A cam follower rides in the cam groove and produces reciprocating motion, with the cam follower being part of a cam follower assembly to which an implement holder is attached. The preferred embodiment has a cam groove configuration which causes the implement holder to move slower during a cutting stroke and faster during a return stroke, thereby tending to optimize the operation of the cutting implement. The preferred embodiment also includes a planetary gear set for reducing the rotational speed of the hand tool output shaft to reduce the speed of reciprocation of the attachment.

PRELL EDWARD T (US)
HULSEY CHARLES (US)
DAVIS JOSH A (US)
ROHR EDWARD J (US)

PCT/IB2005/001653

March 09, 2006

April 15, 2005

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BOSCH GMBH ROBERT (DE)
PRELL EDWARD T (US)
HULSEY CHARLES (US)
DAVIS JOSH A (US)
ROHR EDWARD J (US)

B23D51/16; B23D57/00; B25F3/00; B25F5/00; (IPC1-7): B23D57/00; B25F3/00; B23D51/16

US1871020A	1932-08-09
US2816583A	1957-12-17
US5607265A	1997-03-04

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