US 6,338,600 B2 · Self-tapping, corrosion-resistant screw with hardened tip

Abstract

The invention comprises a self-screwthread-forming screw of corrosion-resistant steel, which screw is partially precipitation-hardened. The invention also concerns a process for producing such a screw in which the screw is firstly shaped by pressing and rolling or by screwthread rolling or cutting or in other known fashion characterized in that the screw is then partially precipitation-hardened.

Claims0

Dependent claims

Claims aren’t available for this document.

Facts

Application

09/440,231Filed 15 Nov 1999

Published

US 2001/0014262 A116 Aug 2001

Granted

15 Jan 2002

Term ends

Not estimatedThe source records don’t support an estimate.

Classification9 codes

F16B 25/0021
Characterised by the material of the body into which the screw is screwed: the material being metal, e.g. sheet-metal or aluminium
C21D 6/02
Heat treatment of ferrous alloys: hardening by precipitation
C21D 9/0093
Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor: for screws; for bolts
C21D 6/002
Heat treatment of ferrous alloys: containing Cr

Self-tapping, corrosion-resistant screw with hardened tip

Life of this patent

Abstract

Claims0

Self-tapping, corrosion-resistant screw with hardened tip

Life of this patent

Abstract

Claims0