Self-drilling one-piece masonry anchor

Details Self-drilling one-piece masonry anchor Self-drilling one-piece masonry anchor

1976-02-23

1977-05-31

Britts, Ramon S.

Cutting by use of rotating axially moving tool

Tool or tool with support

Having inversely angled cutting edge

85 72, 408228, E04B 148

Patent

active

040261867

ABSTRACT:
An expansion anchor device for use in masonry structure which is capable of drilling a hole in the structure and being set without the necessity of removal of the device from the hole. A drill tip portion with a conical upper region is interconnected to a generally cylindrical sleeve portion through a frangible wall. Helical flute grooves are formed on the outer surface of the sleeve to permit exhaust of drilled material from the hole.

REFERENCES:
patent: 1379209 (1921-05-01), Phillips
patent: 1621598 (1927-03-01), Phillips
patent: 2171985 (1939-09-01), Mushet
patent: 3202035 (1965-08-01), Rosselet
patent: 3411398 (1968-11-01), Blakeley et al.
patent: 3467209 (1969-09-01), Chromy
patent: 3487745 (1970-01-01), Brunelle

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