F - Mech Eng,Light,Heat,Weapons – 16 – B
Patent
F - Mech Eng,Light,Heat,Weapons
16
B
F16B 39/30 (2006.01) F16B 25/10 (2006.01) F16B 35/04 (2006.01) F16B 39/282 (2006.01)
Patent
CA 2534016
The present invention provides a wood screw comprising an elongated threaded shank, which is provided with e.g., special spiral threads thereon, a narrow, wood- penetrating base at one end of the threaded shank, and a torque-receiving head at the other end of the threaded shank. The threads of the screw include at least one spur, which is formed either between two of the threads near the narrow, wood-penetrating lower end of the wood screw, or on one of the threads near the narrow, wood-penetrating lower end of the wood screw, or at the base of the wood screw. Such spur projects from the shank and is substantially-parallel to, or on, the spiral threads, to provide a projecting point. This projecting point is so configured and arranged that it acts as a type of barb, and does not create a significant impediment against the securing of the wood screw by applying a torque to the screw in the direction of the hand of the screw (i.e., a right hand), but creates an impediment towards a torque in an opposite hand direction (i.e., a left hand), which would tend to loosen the screw.
Marcus Martin J.
Sadik Achmed N.
Innovate Llp
Marcus Martin J.
Sadik Achmed N.
LandOfFree
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