Bolt tightening tool

Tools – Wrench – screwdriver – or driver therefor – Machine

Patent

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Details

B25B 1700

Patent

active

045037361

ABSTRACT:
Disclosed herein is a bolt tightening tool for tightening a nut onto a bolt, of the type driven by an electric motor, including an outer sleeve adapted to receive a nut for rotational drive therewith, the outer sleeve having an engaging section provided on the inner periphery thereof; an inner sleeve adapted to receive a bolt-tip formed at the extreme end of a bolt, the inner sleeve being mounted within the outer sleeve and effective to move in one axial direction, the inner sleeve having a window portion provided in and extending vertically through the upper wall portion thereof; an engaging member operatively inserted in the window portion and adapted to move in the radial direction of the inner sleeve for engagement with the engaging section of the outer sleeve; a cylindrical movable member operatively inserted in the inner sleeve for movement in the axial direction of the inner sleeve; and a spherical projection provided on a portion of the outer periphery of the cylindrical movable member and adapted to project into the window portion for moving the engaging member; whereby when the spherical projection is retracted by the cylindrical movable member pushed by the bolt-tip, the engaging member is disengaged from the engaging section of the outer sleeve, and when the spherical projection is advanced by the cylindrical movable member, the engaging member is engaged with the engaging section of the outer sleeve.

REFERENCES:
patent: 3028777 (1962-04-01), Essex
patent: 3162072 (1964-12-01), Stewart
patent: 4286482 (1981-09-01), Marsch et al.
patent: 4403529 (1983-09-01), Ikeda et al.

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