Joints and connections – Member deformed in situ
Patent
1988-11-03
1990-06-19
Reese, Randolph A.
Joints and connections
Member deformed in situ
403299, 411437, F16B 3716
Patent
active
049348590
ABSTRACT:
An improved fastening nut is disclosed which is secured to an unthreaded stud which is inserted through a central bore in the nut. The bore includes a guide and retaining splines which provides alignment guidance during sliding insertion of the stud into the bore. The guide splines preferably has an annular configuration with an inner diameter slightly larger than the diameter of the stud so that the initial insertion of the stud does not produce significant frictional resistance. The bore of the nut further includes a plurality of helical threads, preferably twin leads having equal pitch, which are disposed in the bore axially distinct from the guide and retaining splines and terminate within the bore adjacent the guide and retaining splines. The internal helical threads have a crest diameter smaller than the stud diameter and also projects radially inwardly into the bore further than the guide and retaining splines. The helical threads cold-form mating thread impression into the periphery of the stud and the resulting thread impression obstructs any vibrational retraction of the guide and retaining splines to promote retention of the nut on the stud.
REFERENCES:
patent: 3350975 (1967-11-01), Bien
patent: 3491646 (1970-01-01), Tinnerman
patent: 3570361 (1971-03-01), Tinnerman
patent: 3841371 (1974-10-01), Thurston
patent: 4003668 (1977-01-01), Kelly, III et al.
patent: 4599021 (1986-07-01), Kloster
Dixon Stephen J.
Marvell Michael D.
Cuomo Peter M.
Giangiorgi R. A.
Reese Randolph A.
Ryder International Corporation
Textron Inc.
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