Metal working – Method of mechanical manufacture – Assembling or joining
Patent
1982-01-25
1983-09-06
Moon, Charlie T.
Metal working
Method of mechanical manufacture
Assembling or joining
29522R, 411181, B21D 3900, B23P 1100
Patent
active
044021240
ABSTRACT:
For metal plate having a thickness of at least 1/4 inch thick, having a die-punched aperature therein characterized by a die-side hole of a greater diameter and flared aperature channel walls at the die-side hole as compared to an opposite punch-side hole of lesser diameter, inserting into the die-side hole a lower end of a shaft of a particular nut through the aperature and out of the punch-side hole, before pressing the nut downwardly into the aperature a lower edge of a nut head of a diameter larger than the aperature's diameter and smaller than the diameter of the die-side hole at a face of the metal plate on the die-side thereof, being positioned to rest on the flared aperature channel walls at a point spaced-below the face of the plate on the die-side face thereof, pressing the nut downwardly into the aperature, and pressing metal material of the metal plate into a recessed-space formed along an intermediate portion of the nut's shaft in which the intermediate portion has a reduced diameter as compared to the lower end of the shaft at locations circumscribing the punch-side hole of the metal plate sufficiently to lock-in the nut against withdrawal thereof from the aperature; the nut so-defined is utilizable in the method, and the locked-in nut results in a new metal-plate nut combination.
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patent: 3878598 (1975-04-01), Steward
patent: 4281786 (1981-08-01), Krueger
Hough William T.
Moon Charlie T.
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