Variable speed tool and variable speed control method

Details Variable speed tool and variable speed control method Variable speed tool and variable speed control method

2011-03-08

2011-03-08

Nash, Brian D (Department: 3721)

Tool driving or impacting

Automatic control of power operated means

Drive means responsive to torque or speed condition

C173S047000, C173S181000, C173S217000, C173S176000

Reexamination Certificate

active

07900715

ABSTRACT:
The present invention has disclosed a variable speed tool and a variable speed control method. The tool includes a switch; a gearbox housing; a motor; an outputting shaft; a multistage transmitting gear train and a gearshift ring which are mated with the motor and the outputting shaft, the gearshift ring having inner teeth; a gearshift fork mated with the gearshift ring; a tension spring arranged between the gearbox housing and the gearshift fork; and a torque sensing ring provided with a sliding groove in which the gearshift fork is movably disposed. When the load of the outputting shaft has reached to a predetermined value, the torque sensing ring makes the gearshift fork move axially in the sliding groove under the action of the tension spring, thus bringing the gearshift ring to move axially. The variable speed tool of the present invention may automatically adjust the rotating speed and the torque of the outputting shaft according to a variation of the load torque.

REFERENCES:
patent: 4689534 (1987-08-01), Gerber et al.
patent: 4834192 (1989-05-01), Hansson
patent: 4869131 (1989-09-01), Ohmori
patent: 4892013 (1990-01-01), Satoh
patent: 5263906 (1993-11-01), Antonov
patent: 5440215 (1995-08-01), Gilmore
patent: 5897454 (1999-04-01), Cannaliato
patent: 5987754 (1999-11-01), Hirabayashi et al.
patent: 6093128 (2000-07-01), Seith
patent: 6099433 (2000-08-01), Brouwer
patent: 6165096 (2000-12-01), Seith
patent: 6431289 (2002-08-01), Potter et al.
patent: 6502648 (2003-01-01), Milbourne
patent: 6523442 (2003-02-01), Lehnert et al.
patent: 6536536 (2003-03-01), Gass et al.
patent: 6599219 (2003-07-01), Pan
patent: 6655470 (2003-12-01), Chen
patent: 6676557 (2004-01-01), Milbourne et al.
patent: 6729414 (2004-05-01), Cooper et al.
patent: 6758783 (2004-07-01), Chen
patent: 6796921 (2004-09-01), Buck et al.
patent: 6824491 (2004-11-01), Chen
patent: 6857983 (2005-02-01), Milbourne et al.
patent: 6939262 (2005-09-01), Yu
patent: 6971454 (2005-12-01), Bogue
patent: 6984188 (2006-01-01), Potter et al.
patent: 7066691 (2006-06-01), Doyle et al.
patent: 7101300 (2006-09-01), Milbourne et al.
patent: 2009/0071671 (2009-03-01), Zhong et al.
patent: 1050466 (2000-03-01), None
patent: 1748950 (2006-03-01), None
patent: 2399148 (2004-09-01), None
patent: 2004160592 (2004-06-01), None

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