Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Having separate expander means – Including sleeve and distinct tapered expander
Patent
1990-06-04
1991-10-22
Wilson, Neill R.
Expanded, threaded, driven, headed, tool-deformed, or locked-thr
Having separate expander means
Including sleeve and distinct tapered expander
411 82, 411342, 411508, 411913, F16B 1306, F16B 1900
Patent
active
050590731
ABSTRACT:
A peg for anchoring within a hole having an undercut portion comprises a body (1) with an external end (5) for mounting an element thereon and a tapered internal end (11) widening out towards the inside of the hole, a locking ring (2) formed from segments disposed about the body and intended to pivot within the undercut portion (10). The external diameter of the ring (2) is equal to that of the hole (8). Means (4,14,19) for temporarily immobilizing the segments of the ring are mounted upon the body. Means fixed upon the body may drive the ring (2) into the vicinity of the undercut portion of the hole and radially acting means (4) may cause the segments of the ring (2) to pivot into the undercut portion. A resilient annulus (4), by means of force exerted radially inwardly upon the ring (2), ensures the double function of pivoting the segments of the ring (2) and, prior thereto, temporary axial immobilization thereof in combination with a collar (3), which is provided in accordance with one embodiment of the present invention, for temporarily preventing the pivoting function.
REFERENCES:
patent: 4245545 (1981-01-01), Freeman
patent: 4402639 (1983-09-01), Kessler
patent: 4500239 (1985-02-01), Liebig
patent: 4657212 (1987-04-01), Gilmore et al.
patent: 4714391 (1987-12-01), Bergner
Barthomeuf Jean-Paul
Revol Gerard
Societe de Prospection et d'Inventions Techniques (S.P.I.T.
Wilson Neill R.
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