Improved relief screw

F - Mech Eng,Light,Heat,Weapons – 16 – B

Patent

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Details

F16B 35/06 (2006.01) F16B 23/00 (2006.01) F16B 25/00 (2006.01)

Patent

CA 2258315

An improved relief screw (18) is provided for installing a wallboard panel (12) to a stud (14), which consists of a flat head (20) made of an inverted rectilinear slant height frustrum portion (22) and a straight thin cylindrical portion (24). The straight thin cylindrical portion (24) is larger than the widest part of the rectilinear slant height frustrum portion (22), therefore creating an annular flange (26) thereabout. A threaded shank (28) with a conical point (30) extends from a narrow part of the rectilinear slat height frustrum portion (22), while the flat head (20) has a recess (34) to accommodate a driving tool element for imparting rotary motion thereto. A structure (36) is in the flat head (20) for relieving particles of the wallboard panel (12) therefrom, after the flat head (20) is driven into the wallboard panel (12). The top of the straight thin cylindrical portion (24) will be flush with and not damage the outer surface of the wallboard panel (12), while the annular flange (26) will add more gripping support thereto.

L'invention concerne une vis à dépouille améliorée (18) destinée à la pose d'un panneau mural (12) sur un montant (14), laquelle se compose d'une tête plate (20) constituée d'une partie tronconique rectiligne inversée (22) et d'une partie cylindrique droite mince (24). Ladite partie cylindrique droite mince (24) est plus grande que la partie la plus large de la partie tronconique rectiligne (22), créant ainsi un bord annulaire périphérique (26). Une tige filetée (28) présentant un point conique (30) s'étend depuis une partie étroite de la partie tronconique rectiligne (22), tandis que la tête plate (20) présente un évidement (34) destiné à recevoir un élément d'outil d'entraînement destiné à lui conférer un mouvement rotatif. Une structure (36) se trouve dans la tête plate (20) afin d'évider des particules dudit panneau mural (12), uen fois que ladite tête plate (20) est enfoncée dans ledit panneau mural (12). Le haut de la partie cylindrique droite mince (24) est de niveau avec la surface extérieure du panneau mural (12) et ne la détériore pas, tandis que le rebord annulaire (26) lui donne davantage de support de prise.

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