Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Having separate expander means – With hole forming means
Patent
1997-02-28
1999-04-13
Kent, Christopher
Expanded, threaded, driven, headed, tool-deformed, or locked-thr
Having separate expander means
With hole forming means
411 34, 411437, 52705, F16B 1304
Patent
active
058936939
ABSTRACT:
A metal anchor for mounting screws in thin wall boards made of plasterboard, pressed wood or similar building material includes a body (1) formed from a sheet metal plate and provided with semi circular retention ridges (2) projecting alternately to each side, which are matched in width and pitch to the thread shape of the screw (13) to be tightened such that the retention ridges (2) engage into the latter's thread grooves (19). The entire body (1) is formed of three sections, of which the first section (4), situated on the outer end, bears the retention ridges (2), the second section (5), situated in the middle, has two axially running outer bending ridges (7) and two inner bending ridges (8) which are mutually separated by slits (12) and can be bent off in opposing directions, and the third section (6), situated at the head end, is provided with semi circular guide shells (9) extending in opposed directions for inserting the screw (13.).
REFERENCES:
patent: 4430033 (1984-02-01), McKewan
patent: 4500238 (1985-02-01), Vassiliou
patent: 5078561 (1992-01-01), Wollar et al.
patent: 5205688 (1993-04-01), Sundstrom
patent: 5207750 (1993-05-01), Rapata
patent: 5443343 (1995-08-01), Mutz et al.
patent: 5447005 (1995-09-01), Giannuzzi
patent: 5536121 (1996-07-01), McSherry
Barnavol Charles
Collas Jean
Forest Guy
Legat Jean-Jacques
A. Raymond & Cie.
Kang Timothy B.
Kent Christopher
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