Threaded – headed fastener – or washer making: process and apparat – Process – Making internally threaded fastener – e.g. – nut
Patent
1996-10-25
1998-08-11
Larson, Lowell A.
Threaded, headed fastener, or washer making: process and apparat
Process
Making internally threaded fastener, e.g., nut
470 25, 470 87, B21D 5324
Patent
active
057919976
ABSTRACT:
Method and apparatus for modifying conventional internally threaded nut blanks to form one piece all metal prevailing torque locknut fasteners having uniform, repeatable torque characteristics when engaged with conventional bolt threads. This is accomplished by positioning the conventional internally threaded nut blanks in a single file in an orientation with their base facing downward and their arcuate crown portion facing upward and feeding these conventional internally threaded nut blanks one at a time between a first rotating deforming wheel having a substantially "v-shaped" groove on an end surface thereof, the substantially "v-shaped" groove corresponding to the arcuate crown portion of the conventional internally threaded nut blanks, the rotating deforming wheel rotating at a predetermined rotational speed and in a first rotational direction, and a rotating backing wheel positioned a predetermined distance from the rotating deforming wheel, the rotating backing wheel including a flat surface on its end surface corresponding to the base of the conventional internally threaded nut blanks, the rotating deforming wheel rotating at the same predetermined rotational speed as the rotating backing wheel, but in a second rotational direction opposite to that of said wheel.
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"Fasteners: How and Why--A Basic Understand of Fasteners and How to Use Them Correctly" published by MacLean-Fogg Co. of Mundelein, Illinois, and having a 1979 copyright notice marking.
"Grade and Source Identification Marking of Prevailing--Torque Type Hex Nuts Inch and Metric" published by Industrial Fasteners Institute of Cleveland, Ohio, which was issued Jan. 10, 1967, and revised Dec. 20, 1993.
"Locknuts" published by Aztech Engineering, Inc. of Dowers, Grove, Illinois, having what appears to be a 1989 copyright notice marking.
Advertisement for Diversified Fasteners, Inc. of Bristol, Indiana, published in the Fall, 1988, issue of "LINK--The Magazine for Fastener Distributors" publication.
"Quality Fasteners Since 1904" published by Gripco of South Whitley, Indiana, publication date unknown.
Advertisement for Lok-Mor, Inc. of Arlington, Texas, published in the Winter, 1995, issue of the "LINK--The National Magazine For Fastener Distributors" publication.
"STOVER ... The Most Widely Used Locknut in the World" published by RB&W Corporation of Mentor, Ohio having a 1982 copyright notice marking.
Barney John Alan
Pansegrau Erich
Larson Lowell A.
Tolan Ed
Tri-State Tool & Die
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