Device for screwing and unscrewing screws, bolts and nuts

Details Device for screwing and unscrewing screws, bolts and nuts Device for screwing and unscrewing screws, bolts and nuts

1990-09-11

1992-10-27

Cole, Richard R.

Illumination

With implement or hand held holder therefor

Hand tool

81464, 173164, B25B 1900

Patent

active

051583542

ABSTRACT:
Device for screwing and unscrewing screws, bolts and nuts comprising an electric motor (2), a flywheel (14) fixed on an auxiliary shaft (5) connected to the output shaft of the electric motor by means of a pair of pinions (3, 4) made of elastic plastic material like polyurethane and a wrench (9) connectable to said flywheel by way of projecting teeth (15, 16) and moving axially in relation to said flywheel by way of an elastic member (11).

REFERENCES:
patent: 2525588 (1950-10-01), Cameron et al.
patent: 2533703 (1950-12-01), Wilhide et al.
patent: 3212590 (1965-10-01), Hoza et al.
patent: 3951217 (1976-04-01), Wallace et al.
patent: 4110054 (1978-08-01), Moeller, Jr.
patent: 4316512 (1982-02-01), Kibblewhite et al.
patent: 4324158 (1982-04-01), Le Roy
patent: 4505170 (1985-03-01), Van Laere
patent: 4727780 (1988-03-01), Huang
patent: 4833782 (1989-05-01), Smith
patent: 4991472 (1991-02-01), Hollingsworth

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