Threaded fastener
AssigneeEngineered Components Company
InventorArne Henriksen, JR.
Life of this patent
Estimating the term…
Abstract
A fastener having a head and a shaft extending from a first end at the head to a second end forming a tip. The shaft has a first threaded portion and a second threaded portion. The first threaded portion is disposed at the tip. A hardness of the first portion is higher than a hardness of the second threaded portion.
Claims20
A fastener comprising:
- a head, the heading including a recessed portion configured to receive a suitable driving tool;
- and,
- a shaft extending from a first end at the head to a second end, the second end forming a tip of the shaft,
- wherein the shaft has a first portion and a second portion, both the first portion and the second portion being threaded, the first portion disposed at the tip of the shaft and the second portion between the first portion and the head along a longitudinal axis of the fastener, and,
- wherein a hardness of the first portion is higher than a hardness of the second portion.
A method of making a fastener having a head and a shaft extending from a first end at the head to a second end, the second end forming a tip of the shaft, wherein the shaft has a first portion and a second portion, the first portion and the second portion being threaded, the first portion disposed at the tip of the shaft and the second portion between the first portion and the head along a longitudinal axis of the fastener, and wherein the method comprises:
- treating the fastener to provide a first hardness to the fastener;
- and,
- then, treating only the first portion of the fastener to obtain a second hardness higher than the first hardness,
- wherein the second portion comprises the first hardness.
Dependencies are inferred from the claim text.