Metal working – Method of mechanical manufacture – Assembling or joining
Patent
1984-08-31
1985-04-16
Moon, Charlie T.
Metal working
Method of mechanical manufacture
Assembling or joining
B21D 3900, B23P 1100
Patent
active
045106665
ABSTRACT:
A cylindrical knob for installation on a shaft and a method for fastening a decorative disc shaped end cap to a tubular knob body to make the cylindrical knob. The cylindrical knob includes a plastic tubular body having an outer sleeve and an inner core. The inner core is spaced from the outer sleeve at the cap receiving end of the body to form an annular slot. The inner core has a cap supporting surface located adjacent the inner slot and a shaft receiving socket located at the opposite end of the tubular body. An undercut surface is formed in the inner core adjacent to the cap supporting surface and accessible from the annular slot. Passages extend from the socket end of the tubular body to the annular slot. Recesses are formed in the inner core beneath the undercut surface and are spaced generally uniformly around the inner core and open into the annular slot. A disc shaped end cap having a depending skirt is positioned on the cap supporting surface with the skirt located in the annular slot. The lower portion of the skirt is reduced in thickness with the reduction taking place along a relavtively short transition zone to provide a defined bending line. The cap is attached to the tubular body by deforming the skirt into the recesses and against the undercut surface of the inner core.
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patent: 3410247 (1968-11-01), Dronberger
patent: 3410349 (1968-11-01), Troutman
Moon Charlie T.
The Grigoleit Company
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