Method for forming a threaded pin and nut combination
AssigneeAvibank Mfg., Inc.
InventorsJohn A. Duran, Edward Avetisian, Todd Diamond
Life of this patent
Estimating the term…
Abstract
Apparatus and method for forming a pin and nut fastener assembly for temporarily or permanently securing two panels having conventional drilled generally aligned holes into which the assembly is inserted. Weight of the pin and nut is reduced while retaining predetermined industry established strength requirements. The thread section of the pin is reduced along with the mating thread of the nut. The pin may be cold-worked in critical areas.
Claims4
In a method for forming a threaded pin and nut combination for use in permanently securing together a pair of mating panels having aligned apertures wherein said pin extends through said aligned apertures for threaded engagement by a like configured thread of a threaded nut without compromising the fatigue or tension requirements of the pin comprising the steps of:
- forming the threads of said threaded pin by forming spaced threaded portions, each of which having a pair of flanks at an approximate angle of 60° each, truncating each said pair of flank defining an outer major diameter D1, the imaginary point where said flanks would meet when extended to an apex being defined at a point D, forming opposing flank of adjacent spaced threaded portions to define a root diameter d1, the imaginary point where said opposing flanks of adjacent spaced threaded portions would meet being defined at a point d, the distance between D and d being defined by H and the distance between D1 and d1 being defined by h, forming said distance h at about 55% to 65% of the distance H, and forming said root diameter as a continuous diameter, having a constant radius.
Dependencies are inferred from the claim text.