Security fastener

Details Security fastener Security fastener

1983-05-27

1984-12-25

Sakran, Victor N.

Buckles, buttons, clasps, etc.

Trim molding fastener

24297, 411508, A44B 1700, F16B 1304

Patent

active

044894651

ABSTRACT:
An integrally formed fastener molded of plastic material. Such fastener comprises an enlarged head, a shank, shoulders defined near the upper end of the shank, a pair of flexible wings joined to the lower end of the shank, and a pair of stops defined on the shank to limit the movement of the wings toward the shank. The wings flex inwardly until they contact the stops, and then the wings roll inwardly about the stops as the fastener is pushed through aligned apertures in security boxes, panels, etc. While the plastic material, such as polypropylene, possesses sufficient resiliency to be rolled inwardly, the wings will break and/or the shank may fail when the fastener is forcibly withdrawn from its seated position, thus providing a positive indication of an attempted breach of security. Since shoulders are formed on the upper end of the shank, the head of the fastener is positioned above the upper surface of the security box, when the fastener is fully engaged; the head of the fastener can then be cut off, again indicating a breach of security.

REFERENCES:
patent: 2758498 (1956-08-01), Johnson
patent: 3093874 (1963-06-01), Rapata
patent: 3722037 (1973-03-01), Jaeger
patent: 3727271 (1973-04-01), Znamirowski
patent: 3779374 (1973-12-01), Bockenstette
patent: 3811154 (1974-05-01), Lindeman et al.
patent: 3893208 (1975-07-01), Yuda
patent: 4122583 (1978-10-01), Grittner et al.
patent: 4312614 (1982-01-01), Palmer et al.

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