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Tamper-resistant fastener
United States Patent
10,968,942 | |
April 6, 2021 | |
View the Complete Patent at the US Patent & Trademark Office | |
Tamper-Resistant Fastener | |
A tamper-resistant threaded fastener including a circular head having a slot formed in the head transverse to the longitudinal axis, the slot having an enlarged region intermediate an apex and a base of the slot. A cap member includes a head having a drive feature formed therein, the head extending to a first shank portion, extending to an enlarged second shank portion, extending to a foot. The cap member is insertable in the slot only from a direction transverse to the longitudinal axis. During rotational installation of the fastener and cap member in a threaded counterbored opening for securing a barrier for protecting an asset, the foot shears inside the slot at a predetermined rotational drive force, the cap member being rotatable in the opening and protectively covering the fastener head. | |
16/ 166,463 | |
October 22, 2018 | |
1/1 | |
F16B 23/00 (20060101)F16B 35/04 (20060101)F16B 31/02 (20060101)F16B 5/02 (20060101)F16B 41/00 (20060101)F16B 37/04 (20060101) | |
;411/2,3,5;81/471 | |
GOVERNMENT INTEREST STATEMENT This invention was made with Government support under Contract No. DE-NA0003525 awarded by the United States Department of Energy/National Nuclear Security Administration. The U.S. Government has certain rights in this invention. |