Threaded – headed fastener – or washer making: process and apparat – Process – Making washer
Patent
1998-08-20
1999-12-21
Larson, Lowell A.
Threaded, headed fastener, or washer making: process and apparat
Process
Making washer
470 3, 470 8, 470 11, 29413, 82 47, B21D 5320
Patent
active
060042141
ABSTRACT:
A method of forming an apparatus having a captured washer includes the step of forming a shaft with a first end, a second end, a shaft diameter, and an axis. A stop element is provided on the shaft. An integral washer is formed on the shaft spaced from the stop element. The washer has a thickness and a diameter greater than the shaft diameter. The washer extends generally perpendicular to and radially outward from the shaft. The washer has a first surface facing the stop element and opposite surface facing opposite the first surface. A button is formed on and extends axially from the washer opposite. The button has a diameter greater than the shaft diameter and less than the washer diameter. A groove is formed into the first surface of the washer and defines a washer opening having an inside diameter less than the button diameter. The groove is formed so that the washer remains attached to the button by a material bridge extending between the button and. The washer is then separated from the button at the material bridge and retained on the shaft of the apparatus by the diameter difference between the button diameter and the diameter of the washer opening and by the stop element.
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Cobra Metal Works Corp.
Larson Lowell A.
Tolan Ed
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