Self-drilling dowel

Details Self-drilling dowel Self-drilling dowel

1980-11-10

1983-09-06

Holko, Thomas J.

Expanded, threaded, driven, headed, tool-deformed, or locked-thr

Having separate expander means

With hole forming means

411 44, 411 39, F16B 1306

Patent

active

044026374

ABSTRACT:
A self-drilling dowel is formed by a tubular member defining an axially extending bore. The tubular member has a leading end and a trailing end with a cutting head at the leading end. A spreader member is insertable into the bore for expanding the tubular member. A member, preferably a plate, is positioned within and extends transversely across the bore adjacent the leading end forming a closure. The bore closure member is spaced axially from the leading end and it is separate from the tubular member and is displaceably fitted within the bore.

REFERENCES:
patent: 1352494 (1920-09-01), Zifferer
patent: 1379210 (1921-05-01), Phillips
patent: 2561433 (1951-07-01), Uhle
patent: 3605548 (1971-09-01), Mortensen
patent: 3851560 (1974-12-01), Yago
patent: 4091882 (1978-05-01), Hashimoto
patent: 4157677 (1979-06-01), Deutschenbaur et al.
patent: 4223587 (1980-09-01), Deutschenbaur

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