Patent ID: 6899498

Claim:
A spring 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; and (e) barbs having a front point and an origin at the lower head side, the barbs being directed outwardly away from the legs and then inwardly toward the legs.