Patent · US Active

Valve body treated by autofrettage

US10557181B2 · kind B2 · utility

0Cited by

4References

17Claims

0Family size

Assignee

Luxembourg Patent Company S.A. · LU

Inventors

Stephan Sellen · Wehingen, DE
Philippe Schmitz · Steinsel, LU

Key dates

Filing date	Jan 27, 2015
Grant date	Feb 11, 2020
Priority date	—
Expiry date	May 10, 2035

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T29/49863
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

Abstract

The invention is directed to a method for improving the fatigue behavior of the body (2) of a gas valve, the body comprising at least two bores (4, 10) and at least one bore intersection (20) defining an internal volume; wherein the method comprises the following step: subjecting the internal volume to an autofrettage by applying a pressure of comprised between 100 MPa and 500 MPa by means of a liquid. 10. The invention is also directed to a gas valve body (2) comprising at least two bores (4, 10) and at least one bore intersection (20) defining an internal volume with an internal wall; wherein the internal wall is treated by autofrettage resulting in compressive stresses at the intersection or at least one of the intersections.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.