Fastener with hardened threads
AssigneeSimpson Strong-Tie Company, Inc.
InventorsGerald W. Hagel, Joel Houck
Life of this patent
Estimating the term…
Abstract
A method of creating a threaded fastener which includes a shank having a first, threaded portion and a hardened thread portion. The shank includes a thread extending outwardly from a shank body over a first length of the shank. A second portion of the shank includes a groove positioned coincident with the thread and including a turn ratio equal to a turn ratio of the thread. The shank comprises corrosive resistant stainless steel. A coil of hardened steel engages the groove to fill the groove along the second portion.
Claims20
A method for manufacturing a corrosion resistant, self-drilling fastener, comprising:
- forming a shank having a threaded portion and a channel, the threaded portion including a thread extending outwardly from the shank and having a turn profile, the channel formed with a trapezoidal cross-section having at least one turn about the shank matching the turn profile and extending from the thread toward an end of the shank, the shank comprising a corrosion resistant material;
- and
- attaching a coil of a carbon steel material in the channel.
A method for manufacturing a fastener, comprising:
- forming a shank having a threaded portion and a channel, the threaded portion including a thread extending outwardly from the shank and having a turn profile, the channel having at least one turn matching the turn profile and extending from the thread toward an end of the shank, the channel having a trapezoidal cross-sectional profile;
- and
- attaching a coil of a steel material in the channel.
A method for manufacturing a fastener, comprising:
- rolling a fastener blank of a first steel material against a die to create a threaded portion and a channel in the blank, the threaded portion including a thread extending outwardly from the shank and having a turn profile, the channel having at least one turn matching the turn profile and extending from the thread toward an end of the shank;
- and
- hardening a coil of a second steel material;
- and
- attaching the coil in the channel.
Dependencies are inferred from the claim text.