Screwdriver

Details Screwdriver Screwdriver

2007-01-23

2007-01-23

Wilson, Lee D. (Department: 3723)

Tools

Wrench, screwdriver, or driver therefor

Machine

C081S057370, C081S057440, C227S136000

Reexamination Certificate

active

11411818

ABSTRACT:
A screwdriver includes a driver portion, a slider case having a guide slot, a slider (7), comprising parts (7A) and (7B) reciprocating, in the slider case, an arm portion comprising shaft arm (16) and clutch arm that is supported and rotates in the slider (7), engaged with the guide slot of the slider case, and oscillates in accordance with the reciprocation of the slider, and a cylindrical drum that is supported and rotates in the slider, has two flanges (11b) and (11c) engaged with a screw chain belt and a ratchet (11e) engaged with the arm portion, and intermittently delivers the screw chain belt in accordance with the oscillation of the arm portion. The ratchet (11e) of the drum (11) is formed on an inner surface of the flange (11b).

REFERENCES:
patent: 4428261 (1984-01-01), Takatsu et al.
patent: 5027679 (1991-07-01), Kawashima et al.
patent: 5402695 (1995-04-01), Hornung
patent: 5671645 (1997-09-01), Murayama et al.
patent: 6138536 (2000-10-01), Chen
patent: 6186385 (2001-02-01), Huang
patent: 6296166 (2001-10-01), Huang
patent: 2550301 (1997-06-01), None
patent: 2900982 (1999-03-01), None

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