Method and mechanical tamper-evident case fastener

Details Method and mechanical tamper-evident case fastener Method and mechanical tamper-evident case fastener

2008-01-08

2008-01-08

Nguyen, Phung T. (Department: 2612)

Communications: electrical

Condition responsive indicating system

Specific condition

C340S568100, C070S33300A

Reexamination Certificate

active

11246823

ABSTRACT:
A method and apparatus are provided for identifying product tampering. A mechanical fastening screw, a sleeve and a movable follower disk are arranged to show evidence of tampering. The movable follower disk is received within a cavity defined by the sleeve. The sleeve includes a channel and a final resting slot defined within a sleeve wall. The movable follower disk includes compressible spring followers slideably received within the channel when the mechanical fastening screw is inserted. If the screw is removed, the compressible spring followers engage the final resting slot to indicate tampering. Electrical detection of the compressible spring followers engaging the final resting slot is used to identify tampering.

REFERENCES:
patent: 6087939 (2000-07-01), Leyden et al.
patent: 6407666 (2002-06-01), Debrody et al.
patent: 6956479 (2005-10-01), Kelsch et al.
patent: 2004/0066296 (2004-04-01), Atherton
patent: 2006/0265953 (2006-11-01), Hobbs

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