Blind fastener with deformable sleeve

Details Blind fastener with deformable sleeve Blind fastener with deformable sleeve

F - Mech Eng,Light,Heat,Weapons

16

B

F16B 19/10 (2006.01) F16B 39/284 (2006.01)

Patent

CA 2183450

A blind fastener (10) having a body (20), a core bolt (22), a nut (26) and a sleeve (24). The core bolt (22) passes through an axial bore (38) of the body (20) and includes an externally threaded portion at an inner end (40) thereof. The nut (26) has an enlarged head (56), a reduced diameter stem (58) and a threaded bore (54) for engaging the threaded portion (40) of the core bolt (22). The sleeve (24) is located between the enlarged head (56) of the core bolt (22) and a conically shaped inner portion (28) of the body (20). An inner end portion (70) of the sleeve (24) is fixed to the stem of the nut (26). In a preferred embodiment, the inner end portion (70) of the sleeve (24) is crimped to the nut (26) and has a thickness sufficient to engage the nut (26) across the full width of an annular shoulder (62) of the nut (26) during setting of the fastener (10).

L'invention concerne une fixation en aveugle (10) ayant un corps (20), un boulon central (22), un écrou (26) et un manchon (24). Le boulon central (22) est logé dans un trou axial (38) du corps (20) et comporte une portion extérieurement filetée à son extrémité interne (40). L'écrou (26) a une tête agrandie (56), une tige de diamètre diminué (58) et un alésage fileté (54) pour s'engager sur la portion filetée (40) du boulon central (22). Le manchon (24) se trouve entre la tête agrandie (56) du boulon central (22) et une portion interne en forme de cône (28) du corps (20). Une portion d'extrémité interne (70) du manchon (24) est fixée sur la tige de l'écrou (26). Dans une forme d'exécution préférée, la portion d'extrémité interne (70) du manchon (24) est serrée sur l'écrou (26) et elle a une épaisseur suffisante pour venir en prise avec l'écrou (26) sur toute la largeur d'un épaulement annulaire (62) de l'écrou (26) durant la mise en place de la fixation (10).

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