Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Headed fastener element with nut – washer – securing means or cap – Headed bolt or screw with threads and complementary nut
Patent
1981-07-23
1984-02-21
Shedd, Wayne L.
Expanded, threaded, driven, headed, tool-deformed, or locked-thr
Headed fastener element with nut, washer, securing means or cap
Headed bolt or screw with threads and complementary nut
411437, 411412, 411432, F16B 2700
Patent
active
044326840
ABSTRACT:
A threaded member has an external helical thread 18a presenting a crest 24 of spiral outline whose trailing end is in the form of an abutment 26 for resisting withdrawal from a resiliently deformable workpiece. In a preferred application, the threaded member is a die-cast grub screw S and locates within a hinged plastics furniture fastener F. Advancing the grub screw S by 1/2-turn from its initial position in the fastener F breaks a frangible locating web 28 and allows the abutment 26 to pass an abrupt shoulder 64. This gives a tangible warning to the user that a ridge 12b on the grub screw S is correctly located beneath a head H of an anchor A.
REFERENCES:
patent: 1825419 (1931-09-01), Plym
patent: 4231247 (1980-11-01), Haydon
patent: 4341485 (1982-07-01), Appleby et al.
Blackburn Neil P.
Palmer John P.
ITW Limited
Shedd Wayne L.
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