Fastener

Details Fastener Fastener

1978-12-14

1981-04-21

Holko, Thomas J.

Expanded, threaded, driven, headed, tool-deformed, or locked-thr

Having separate expander means

29526R, 411360, 411 39, F16B 1304

Patent

active

042625777

ABSTRACT:
A fastener for use with a connecting element such as a screw comprises a thickened head of a firm but plastic material, a shank, and a tail. The head and shank are first placed into a hole; then a connecting element such as a screw is inserted alongside of the head to cause the head to wedge into the wall of the hole and hold the screw tightly. In one aspect the shank and tail are connected by an indented portion that facilitates breaking away the tail and indicates the desired depth of insertion of the head, and in another aspect the head contains a second, harder material to facilitate the wedging action of the head.

REFERENCES:
patent: 484204 (1892-10-01), Huber et al.
patent: 633838 (1899-09-01), Harrison
patent: 772118 (1904-10-01), Ahlvin
patent: 1248006 (1917-11-01), Pleister
patent: 1267902 (1918-05-01), Pleister
patent: 1318584 (1919-10-01), Peirce
patent: 1359833 (1920-11-01), Osgood
patent: 1646457 (1927-10-01), Ogden
patent: 2088358 (1937-07-01), Adams
patent: 2287395 (1942-06-01), Reynolds
patent: 2588860 (1952-03-01), Marks
patent: 3021745 (1962-02-01), Libom
patent: 4043245 (1977-08-01), Kaplan

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