Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Headed fastener element with nut – washer – securing means or cap – Cap over the head
Patent
1997-07-10
1998-10-27
Saether, Flemming
Expanded, threaded, driven, headed, tool-deformed, or locked-thr
Headed fastener element with nut, washer, securing means or cap
Cap over the head
411431, 411429, 411910, A47G 300
Patent
active
058270299
ABSTRACT:
A device for restricting access to the head (10) of a fastener (9) has a first part (18) including an attaching flange (26) adapted to be captive between the head (10) and a member 14 in which the shank (12) of the fastener is to be received. The first part (18) has a recess (13) which the head (10) is accommodated and the second part of the device (20) is dimensioned to be slidingly received in the recess to close the recess without engaging the head (10). The first and second parts (18, 20) have formations (30, 38) which cooperate when the second part 20 is sufficiently inserted into the recess (30), to prevent withdrawing of the second part (20) from engagement with the first part (18), whereby to prevent access to the fastener. The first and second parts comprise frustroconical external surfaces (22, 24), which in use taper in a direction away from the member (14) to which the device is to be secured in use.
REFERENCES:
patent: 4295766 (1981-10-01), Shaw
patent: 4668143 (1987-05-01), Rotar
patent: 4756652 (1988-07-01), Hatter
patent: 4777775 (1988-10-01), Verble
patent: 4841838 (1989-06-01), Scully
patent: 5469726 (1995-11-01), Rushing
patent: 5651651 (1997-07-01), Spencer
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