Self-torquing nut

Details Self-torquing nut Self-torquing nut

1998-06-15

1999-07-27

Wilson, Neill

Expanded, threaded, driven, headed, tool-deformed, or locked-thr

Torque responsive nut or bolt driving connection

Frangible connection

411 3, 411917, F16B 3100, F16B 3304

Patent

active

059279176

ABSTRACT:
A tamper-proof, precision, torque limiting nut device is disclosed. The device comprises an inner collar member having a threaded bore to receive a bolt, stud or the like and an outer sleeve member interconnected to the collar by pins or by welds having a shear strength up to a predetermined torque value. The nut can be tightened on a bolt or stud up to the predetermined shear value, above which the pins or welds shear, to achieve tightening of the nut to the desired torque without the use of a torque wrench. Overtorquing and undertorquing are prevented, and tampering with the nut is substantially obviated.

REFERENCES:
patent: 3191486 (1965-06-01), Gibbens
patent: 3267792 (1966-08-01), Yackle
patent: 4167886 (1979-09-01), Seghezzi et al.
patent: 5256015 (1993-10-01), St. Clair
patent: 5391033 (1995-02-01), Gibbons

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