F - Mech Eng,Light,Heat,Weapons – 16 – B
Patent
F - Mech Eng,Light,Heat,Weapons
16
B
F16B 23/00 (2006.01) B25B 15/00 (2006.01)
Patent
CA 2108743
A recessed screw has a recess (12) formed in the head of screw, and the recess is defined as a superimposition of two equilaterally-triangular bores (14) which each have vertices (13) shaped arcuate and are arranged coaxially with a phase shift of 60° around the screw axis. The recess thus has alternating six grooves (15) and six driven vanes (16) having side walls (16a) extending parallel with the axis, and an inner ridge of vane is a conically curved sticking wall (18) inwardly slanted towards a bottom (17) of the recess (12). The cross-sectional area (A) of groove (15) is larger than that (B) of each vane (16). A driver bit (25) has six driving vanes (27) in conformity with the grooves (15) and six valleys (28) each interposed between the adjacent driving vanes and corresponding to the driven vanes (16) in recess (12), such that a biting action appears between the.recess and bit, the driving vanes can be strengthened, and any conventional bit for Torx screws can be used with the recessed screw.
Kirby Eades Gale Baker
Yugenkaisha Shinjo Seisakusho
LandOfFree
Recessed screw does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Recessed screw, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Recessed screw will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1699787