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US 8,979,455 B2Granted
Clinch fastener
AssigneeRifast Systems LLC
InventorJohn E. Burton
Life of this patent
Estimating the term…
Abstract
A self-clinching fastener for insertion into ductile sheets of varying thicknesses has increased push-out and torque-out resistance. The self-clinching fastener includes a plurality of radial projections and spline teeth that embed into the ductile sheets, causing the material to cold flow into a recess, thereby permanently clinching the self-clinching fastener to the ductile sheet.
Claims12
A self-clinching fastener for connection to a hole in ductile material and including a central axis, the self-clinching fastener comprising:
- a threaded portion and a head portion having a ductile material face having a plurality of radial projections extending from the central axis, the projects being spaced apart around the central axis;
- a plurality of teeth extending radially and along the central axis;
- and
- a clinched material recess having a diameter smaller than the outer diameter of the threaded portion and adjacent a side of the plurality of teeth opposite the ductile material face, each of the plurality of teeth having a shoulder portions to cause the ductile material to flow into the clinched material recess when the self-clinching fastener is pressed into the ductile material.
1 more element
Dependencies are inferred from the claim text.