Drill-out threaded broken bolt extractor

Details Drill-out threaded broken bolt extractor Drill-out threaded broken bolt extractor

1987-10-05

1988-10-18

Meislin, Debra

Tools

Wrench, screwdriver, or driver therefor

Stud-removal and implacement

81441, B25B 1348

Patent

active

047778504

ABSTRACT:
A drill-out threaded broken bolt fastener extractor combination tool wherein an extractor is combined with a drill head so that in use the drilling and extracting steps are performed in the same operation. The extractor is reciprocally and rotatably mounted on the drill bit shaft enabling the drill bit to penetrate within a broken bolt stud and subsequently having the extractor engage the same for removal. A drive head is provided for a suitable force-producing device.

REFERENCES:
patent: 2684606 (1954-07-01), Brawley
patent: 4078458 (1978-03-01), Berendzen
patent: 4604917 (1986-08-01), Polonsky

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