F - Mech Eng,Light,Heat,Weapons – 16 – B
Patent
F - Mech Eng,Light,Heat,Weapons
16
B
F16B 25/02 (2006.01)
Patent
CA 2607377
The present invention pertains to a screw (3) for use in nonmetal objects comprising a plurality of cut-aiding portions (311) formed by the longer (312) and shorter (313) cutting surfaces inclined toward an opposite direction. Further, a cutting edge (314) formed by the junction of any two adjacent cutting surfaces (312,313) presents in a fastening direction of the screw. Thus, the cutting edge assists the threads (33) to thoroughly severe and to shatter the wood fibers and debris of the objects, which can also be accommodated into the cut-aiding portions. Also, the ridge (317) of the longer cutting surface (312) aids in cutting fibers and further guides the debris out. In this manner, the present invention facilitates to enhance cutting capability with less screwing resistance, prevent the destruction of the object and increase the screwing speed.
Vis (3) pour objets non métalliques comportant une multitude de portions aidant à la coupe (311) formées par des surfaces coupantes longues (312) et courtes (313) inclinées dans des directions opposées. De plus, un bord coupant (314) formé par la jonction de deux surfaces coupantes adjacentes (312, 313) se présente dans la direction du mouvement de la vis. Ainsi, le bord coupant aide le filet (33) à couper complètement et à briser les fibres de bois et les débris des objets, avec l'assistance des portions aidant à la coupe. De plus, l'arête (317) de la surface coupante longue (312) aide à couper les fibres et guide les débris vers l'extérieur. Ainsi, la vis permet l'amélioration de la capacité de coupe tout en diminuant la résistance pendant le vissage, ce qui empêche la destruction de l'objet et accélère le vissage.
Macrae & Co.
Zyh Yin Enterprise Co. Ltd
LandOfFree
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