Patent ID: 8235635
Filing Date: 2012-08-07
Classification: F16B,Y10T

Abstract:
1. An anchoring fastener, comprising: a cylindrical body having front and rear ends and a predetermined diameter, a head having a diameter greater than said predetermined diameter of said body and attached to said rear end of said body, a bore passing axially through said head and said body, a shaft having front and rear ends with respectively first and second portions of approximately equal lengths, said first portion having a substantially constant diameter and terminating in a pointed tip at said front end, and said second portion having a diameter that increases from that of said first portion at said front end and becomes approximately equal to said diameter of said body at said rear end and terminates in a lever arm with a fulcrum at said rear end, and a plurality of sharpened fins extending radially outward from said second portion of said shaft and said body, and extending axially from said second portion of said shaft to said head, said fins being joined to said second portion of said shaft, to said body, and to said head, and having a bendable portion extending axially across a region between said shaft and said body, thereby joining said shaft and said body, whereby when said tip, said shaft, and said body are forced into a wall with an inner surface and an outer surface, said fastener will penetrate said wall until said head is in contact with said outer surface of said wall, whereupon when an activating member is inserted into said bore and is urged against said fulcrum, said lever arm forces said fins to bend at said bendable portions of said fins, causing said shaft to rotate about said region until said shaft comes into contact with said inner surface of said wall, thereby securing said fastener against pullout from said wall.