Tools – Wrench – screwdriver – or driver therefor – Plural pivoted jaws and handle-lever
Patent
1991-10-03
1993-05-25
Meislin, D. S.
Tools
Wrench, screwdriver, or driver therefor
Plural pivoted jaws and handle-lever
81113, 81115, 279 52, B25B 1332
Patent
active
052130150
ABSTRACT:
A variable nut driver includes a multi-fingered collet with individual jaw faces at the free ends of the fingers and a ring connecting together all of the fingers at their other ends. The collet is contained within a tubular member secured to a handle. A flat thread follower within the collet has projections which extend between the fingers and through opposing elongated slots in the tubular member. The projections engage the inner thread of a rotatable sleeve surrounding the tubular member and collet at axially displaced positions. Rotation of the sleeve moves the thread follower and collet axially forward or back. As the collet is moved back the jaw faces extending past the open end of the tubular member are cammed toward each other. Conversely, as the collet is moved forward, the jaw faces move away from each other. Rearward movement of the sleeve is restricted by the position of the handle relative to the tubular member. This prevents the sleeve from becoming disengaged from the thread follower.
REFERENCES:
patent: 816777 (1906-04-01), Brown
patent: 957760 (1910-05-01), Fray
patent: 1114653 (1914-10-01), Starin
patent: 2390034 (1945-11-01), Walker
patent: 3339439 (1967-09-01), Van Dalen et al.
patent: 3373639 (1968-03-01), Van Dalen et al.
Lehrer Norman E.
Meislin D. S.
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