Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Torque responsive nut or bolt driving connection – Frangible connection
Patent
1995-07-20
1997-10-28
Saether, Flemming
Expanded, threaded, driven, headed, tool-deformed, or locked-thr
Torque responsive nut or bolt driving connection
Frangible connection
411 14, 411397, 411393, F16B 3100
Patent
active
056811357
ABSTRACT:
A fastener system includes an applicator for engagement by a tool, and a fastener such as a screw having a first surface with first screw threads in a one hand direction for engaging a workpiece. An attachment mechanism is provided to transfer rotational force from the applicator to the fastener and has second and third screw threads in an opposite hand direction to the first screw threads. The second and third screw threads are interfaced to establish a torque of the predefined magnitude prior to the fastener being attached to the workpiece. When the torque applied by the tool exceeds the predefined magnitude, the attachment mechanism begins to unthread and further application of torque from the tool to the fastener ceases, thereby controlling the applied torque to no greater than the predefined magnitude. The attachment mechanism can be used in a variety of applications including flush mounted heads, shallow aperture installations and multistage torque mountings.
REFERENCES:
patent: 162544 (1875-04-01), Franklin
patent: 354123 (1886-12-01), Flynn
patent: 869086 (1907-10-01), Hoffman
patent: 1082945 (1913-12-01), Graham
patent: 1194792 (1916-08-01), Stewart
patent: 1635895 (1927-07-01), Michelin
patent: 2371595 (1945-03-01), Nield
patent: 2748824 (1956-06-01), Brill
patent: 3237507 (1966-03-01), Modrey
patent: 3460428 (1969-08-01), Charles
patent: 3728933 (1973-04-01), Grube
patent: 3841177 (1974-10-01), Watterback
patent: 3851386 (1974-12-01), Ellzey
patent: 3886707 (1975-06-01), Heldt
patent: 4018132 (1977-04-01), Abe
patent: 4253509 (1981-03-01), Collet
patent: 4304503 (1981-12-01), Gehring
patent: 4317585 (1982-03-01), Boice
patent: 4324036 (1982-04-01), Reilly
patent: 4480513 (1984-11-01), McCauley
patent: 4579531 (1986-04-01), Hinks
patent: 4653244 (1987-03-01), Farrell
patent: 4681496 (1987-07-01), Fasolino
patent: 4687392 (1987-08-01), Bidwell
patent: 4690365 (1987-09-01), Miller
patent: 4723541 (1988-02-01), Reese
patent: 4729707 (1988-03-01), Takahashi
patent: 4786201 (1988-11-01), Huetter
patent: 5116337 (1992-05-01), Johnson
patent: 5122133 (1992-06-01), Evans
patent: 5165831 (1992-11-01), Yager
patent: 5226765 (1993-07-01), Walton
patent: 5261910 (1993-11-01), Warden
patent: 5347894 (1994-09-01), Fischer
patent: 5375956 (1994-12-01), Pennig
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