Patent ID: 6835037
Filing Date: 2004-12-28
Classification: F16B,Y10S,Y10T

Abstract:
A fastener comprising:(a) a substantially flat head portion comprising a first hole, the flat head comprising at least a lower side; (b) a neck having an opening and two side neck portions, the neck extending from the lower side of the substantially flat head portion at a substantially right angle with respect to the substantially flat head portion; (c) two substantially flat legs extending from the neck, each leg having an inner surface, the two inner surfaces of the two legs being at an initial proximity with each other, the legs being expandable in opposite directions upon inserting through the first hole an expansion member, thus bringing the expansion member to a contact region of the legs, each leg also having side leg portions; (d) a funnel configuration in the vicinity of the contact region; (e) at least one long barb having an origin at a region selected from the side neck portion, and the side leg portion, the at least one long barb also having a front point which front point substantially reaches or exceeds the lower side of the substantially flat head, the at least one long barb directed outwardly away from the legs and toward the substantially flat head; and (f) at least one short barb having an origin at a region selected from the side neck portion, and the side leg portion, the at least one short barb also having a front point which front point reaches lower than the lower side, the at least one short barb directed outwardly away from the legs and toward the substantially flat head.