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Machine translation
1. (WO1981001870) EXPANSION SCREW
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/1981/001870    International Application No.:    PCT/SE1980/000334
Publication Date: 09.07.1981 International Filing Date: 16.12.1980
IPC:
F16B 13/04 (2006.01), F16B 13/06 (2006.01)
Applicants:
Inventors:
Priority Data:
7910573 21.12.1979 SE
Title (EN) EXPANSION SCREW
(FR) VIS A EXPANSION
Abstract: front page image
(EN)An expansion screw for fixing in a cavity is threaded at the outer end of its screw portion for co-action with a nut (2) and is provided with an expandable sleeve (10) about its opposite end. The sleeve has an inner profile coacting with an outer profile of the expansion screw for expanding the sleeve when the screw (1) is withdrawn from the sleeve. The outer profile of the screw portion (1) is formed by a plurality of coaxial cones (3-6) with intermediate cylindrical junction portion (7-19), all cones and junction portions being made integral with the rest of the screw portion. The inner profile of the sleeve (10) is formed by thickened places (12), projecting inwards from the inner surface of the sleeve and corresponding to the cylindrical junction portions, and by the attenuated places (13) of the sleeve corresponding to the coaxial cones. The thickness of the sleeve is adapted to allow portions of it to be expanded by the cones into bulges (37) going round the sleeves, said bulges being intended to penetrate into the wall of the cavity for fixing the expansion screw.
(FR)Une vis a expansion de fixation dans une cavite est filetee a son extremite exterieure de sa partie de vissage de maniere a cooperer avec un ecrou (2), et elle est pourvue d"un manchon expansible (10) autour de son extremite opposee. Le manchon possede un profil interne cooperant avec un profil externe de la vis a expansion pour elargir le manchon lorsque la vis (1) est retiree du manchon. Le profil externe de la partie vis (1) est formee par une pluralite de cones coaxiaux (3-6) avec des parties intermediaires de jonction cylindrique (7-10), tous les cones et toutes les parties de jonction etant solidaires avec le reste de la partie vis. Le profil interne du manchon (10) est forme par des regions de surepaisseur (12) se projetant vers l"interieur a partir de la surface interne du manchon et correspondant aux parties cylindriques de jonction, et par les regions amincies (13) du manchon correspondant aux cones coaxiaux. L"epaisseur du manchon est adaptee pour que des portions de ce dernier soient expansees par les cones en formant des renflements (37) autour des manchons, ces renflements etant destines a penetrer dans la paroi de la cavite pour fixer la vis d"expansion.
Designated States:
Publication Language: English (EN)
Filing Language: English (EN)