Patent ID: 7581912
Filing Date: 2009-09-01
Classification: F16B

Abstract:
1. A fastener device comprising: an elongated shank having a head at one end and a sharpened tip at the opposite end, the shank having a central planar cross-member with a front face and a rear face; first and second forward vanes extending from tbe front face of said cross-member, one at each elongate edge of the front face; and first and second rearward vanes extending from the rear face of said cross member, one at each elongate edge of the rear face; such that the external surfaces of the first forward vane and the first rearward vane are contiguous and form an obtuse angle, and the external surfaces of the second forward vane and the second rearward vane are contiguous and form an obtuse angle; wherein the junction of the external surfaces of the first forward and rearward vanes forms an angle of about 155° and the junction of the external surfaces of the second forward and rearward vanes forms an angle of about 155°.