Power tool

Details Power tool Power tool

2006-10-02

2009-12-29

Payer, Hwei-Siu C (Department: 3724)

Cutlery

Cutting tools

Saw

C030S393000, C074S060000

Reexamination Certificate

active

07637018

ABSTRACT:
A power tool includes a housing, a rotary motor disposed in the housing, a jack shaft coupled to the motor and a spindle mounted in the housing for carrying a tool. A first wobble plate assembly is coupled to the jack shaft for driving the spindle to reciprocate at least approximately linearly in a linear path along a predetermined axis. A counterweight is mounted in the housing for performing a rotative reciprocating motion and pivoting relative to the housing about a pivot axis. The pivot axis is disposed in a plane perpendicular to the predetermined axis and fixed relative to the housing. A second wobble plate assembly is coupled to the jack shaft for driving the counterweight. The use of the counterweight results in no friction or restriction with a large stroke and large area, so that stability is improved, fitting of the counterweight is simple and cost is reduced.

REFERENCES:
patent: 5025562 (1991-06-01), Palm
patent: 5555626 (1996-09-01), Fuchs
patent: 6286217 (2001-09-01), Dassoulas et al.
patent: 6508151 (2003-01-01), Neitzell
patent: 6634107 (2003-10-01), Osada
patent: 6829831 (2004-12-01), Neitzell
patent: 2001/0034941 (2001-11-01), Bednar et al.
patent: 2005/0193571 (2005-09-01), Hai-Chun
patent: 19648972 (1997-05-01), None

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