Screw extractor

Details Screw extractor Screw extractor

1976-10-13

1978-03-14

Jones, Jr., James L.

Tools

Wrench, screwdriver, or driver therefor

Wheel or endless track operated

29240, 81 532, 408230, B25B 1348

Patent

active

040784584

ABSTRACT:
A screw extractor utilizes a twist drill affixed to one end of an extractor bit having a shank portion suitable for grasping by the chuck end of an electric drill. In use, the drill causes a hole to be formed along the length of the body of the screw to be extracted. Continued rotation in a selected direction of the assembly causes the extractor bit to grasp the walls of the hole. The screw is easily removed without requiring the user to first drill a hole and then manually remove the screw utilizing a separate extractor bit.

REFERENCES:
patent: 1863046 (1932-06-01), Githers et al.
patent: 2863348 (1958-12-01), Conger
patent: 3654690 (1972-04-01), Hardin

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