Threaded fastener with reusable thread forming pilot tip

Details Threaded fastener with reusable thread forming pilot tip Threaded fastener with reusable thread forming pilot tip

1976-02-06

1977-05-10

Frazier, Roy D.

85 41, 85 46, F16B 3500

Patent

active

040220990

ABSTRACT:
A threaded fastener, such as a bolt or a screw, is releasably secured at its shank end in driving relation with a separate hardened thread forming pilot tip whereby during assembly of the threaded fastener into an unthreaded hole in a member, the threaded fastener is power driven to drive the pilot tip which forms threads in the hole into which the threaded fastener follows, the threaded fastener being free to slide axially relative to the pilot tip whereby to attain thread alignment with the threads in the hole before engagement therewith. After the pilot tip exits from the hole, it is removed from this fastener for use with another fastener.

REFERENCES:
patent: 793690 (1905-07-01), Snyder
patent: 1447056 (1923-02-01), Bates
patent: 2292102 (1942-08-01), Cluett
patent: 2783809 (1957-03-01), Haines
patent: 2993950 (1961-07-01), Forman

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