Metal working – Method of mechanical manufacture – Assembling or joining
Patent
1994-07-25
1996-04-30
Wilson, Neill R.
Metal working
Method of mechanical manufacture
Assembling or joining
411368, 411533, 411999, B21D 3900, F16B 3300, F16B 4300
Patent
active
055113010
ABSTRACT:
A fastener is mounted in preassembly with a workpiece through an aperture in the workpiece. The fastener has a head and an elongate shank integrally formed therewith. The shank has a threaded portion and an unthreaded portion with the threaded portion having a major diameter which is greater than the inside diameter of the aperture in the workpiece and the unthreaded portion having an outside diameter which is less than the inside diameter of the aperture in the workpiece. To engage the fastener with the workpiece, the threaded portion is passed through the aperture to dispose the unthreaded portion within the aperture. When the fastener is engaged with the aperture, a partial internal thread is formed therein which does not materially enlarge or decrease the effective inside diameter of the aperture. The difference between the inside diameter of the aperture and the major diameter of the threaded portion provides a degree of interference which maintains the fastener in a preassembled condition with respect to the workpiece.
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Textron Inc.
Wilson Neill R.
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