Tools – Wrench – screwdriver – or driver therefor – Responsive to movement of work
Patent
1979-03-30
1981-09-08
Simpson, Othell M.
Tools
Wrench, screwdriver, or driver therefor
Responsive to movement of work
B25B 1500
Patent
active
042879230
ABSTRACT:
A power-driven screwing head for use with a hand held power drill comprises a shank which can be clamped in the chuck of the drill. A screwdriver bit held in the head and consisting of a shank part and a blade part forms part of a coupling, which when a predetermined depth of screw penetration has been attained, automatically interrupts transmission of torque from the shank to the screw.
REFERENCES:
patent: 2157574 (1939-05-01), Siesel
patent: 2339210 (1944-01-01), Volz
patent: 2351996 (1944-06-01), Morgan
patent: 2461491 (1949-02-01), Booth
patent: 2472659 (1949-06-01), Greer
patent: 2491325 (1949-12-01), McVey
Simpson Othell M.
Zatarga J. T.
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