Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Threaded fastener locked to a discreet structure – Member preassembled with substructure at through-passage or...
Patent
1986-09-12
1988-08-30
Gall, Lloyd A.
Expanded, threaded, driven, headed, tool-deformed, or locked-thr
Threaded fastener locked to a discreet structure
Member preassembled with substructure at through-passage or...
29432, 295251, 411939, F16B 3906
Patent
active
047672498
ABSTRACT:
The present invention is a self-broaching key for locking a fastener assembly in a relatively hard carrier material and a method for making such a key. A unique cutting surface (40) is provided with a particular angular orientation relative to the thread form of the carrier passage threads, and includes a curvilinear portion (42) immediately adjacent the tang portion (32). As the key (30) is installed for locking engagement, the cutting surface (40,42) displaces carrier material in a manner which directs the displaced material away from the cutting surface (40) as the key (30) advances into the carrier material. Also provided on the tang portion (32) is a curvilinear surface (46) which further assists in directing the displaced material away from the cutting surface (40). Two pairs of arcuate extensions (47a, 47b and 48a, 48b) are located on the tang portion (32) to temporarily but reliably secure the key (30) in a key slot with a minimum of frictional engagement between the key and the walls of the key slot.
REFERENCES:
patent: 1158454 (1915-11-01), DeCamp
patent: 2958358 (1960-11-01), Neuschotz
patent: 3039508 (1962-06-01), Greene
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patent: 3346031 (1967-10-01), Neuschotz
patent: 3371697 (1968-03-01), James
patent: 3650309 (1972-03-01), Neuschotz
patent: 3667526 (1972-06-01), Neuschotz
Elcock Robin W.
Guevara Belen A.
Gall Lloyd A.
Rexnord Inc.
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