Tools – Wrench – screwdriver – or driver therefor – Machine
Patent
1987-01-13
1988-11-08
Schmidt, Frederick R.
Tools
Wrench, screwdriver, or driver therefor
Machine
81 5724, B25B 2900
Patent
active
047827262
ABSTRACT:
Our lead screw driver comprises a drive head for engaging and driving a complementary driver head portion of a threaded fastener, and a manipulator for positioning the drive head and a fastener engaged therewith for alignment of the same for driving the fastener into a pilot hole at a given location in a workpiece. A motor rotates the drive head and a lead screw arrangement is operatively coupled with the drive head for advancing the same at a given rate corresponding to the thread pitch of the fastener to be driven thereby so as to minimize stresses upon the material of the workpiece during the driving of the fastener. Preferably, a brake is operatively coupled to the manipulator and this brake is selectively actuatable for holding the manipulator against movement of the manipulator means, to hold the fastener aligned with the pilot hole while driving the fastener.
REFERENCES:
patent: 3333613 (1967-08-01), Bosse
patent: 3694888 (1972-10-01), Bosse
patent: 4295393 (1981-10-01), Adcock
patent: 4483219 (1984-11-01), Sticht
Hunter Donald W.
Kanner Rowland W.
Ryder Francis E.
White Timothy R.
Ryder Internation Corporation
Schmidt Frederick R.
Vaught Bradley I.
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