Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Torque responsive nut or bolt driving connection – Frangible connection
Patent
1982-05-11
1984-01-24
Holko, Thomas J.
Expanded, threaded, driven, headed, tool-deformed, or locked-thr
Torque responsive nut or bolt driving connection
Frangible connection
70231, F16B 4100
Patent
active
044273266
ABSTRACT:
The present invention comprises a lug nut which has two separable portions connected by a frangible neck, wherein a first portion engages the threads of the stud, and a second portion provides a surface adapted to engage a wrench so that the lug nut may be driven into the stud. When the stud-engaging first portion has been threaded onto the stud and sufficiently tightened, continued application of torque cause the frangible, wrench-engaging second portion to shear off from the stud-engaging first portion. The stud engaging portion has an annular notch which is adapted to engage a snap ring located in the wrench-engaging portion. After the wrench-engaging portion is severed from the stud-engaging portion, the wrench-engaging portion is then reversed and positioned onto the stud-engaging portion. When so positioned, the snap ring engages the notch, which rotatably secures the wrench-engaging portion to the stud engaging portion. The wrench-engaging portion, thus acts as a cover or shroud for the stud-engaging portion, and being rotatable provides a tamper-proof cover for the stud-engaging portion.
REFERENCES:
patent: 1870427 (1932-08-01), Stallings et al.
patent: 2179045 (1939-11-01), Lewis
patent: 3191486 (1965-06-01), Gibbens
patent: 3602976 (1971-09-01), Grube
patent: 3667339 (1972-06-01), Dame
patent: 4037515 (1977-07-01), Kesselman
patent: 4046052 (1977-09-01), Nordstrom
patent: 4057985 (1977-11-01), Stahl
patent: 4159667 (1979-07-01), Nordstrom
Hobson Stephan C.
Stokes Kerry E.
Egan Donald E.
Holko Thomas J.
Image Industries, Inc.
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