Patent · US Expired

Process and apparatus for monitoring the formation and propagation of cracks in machine parts and components

US4448080A · kind A · utility

8Cited by

4References

6Claims

0Family size

Assignee

BASF SE

Inventors

Manfred Dressel · Lambsheim, DE
Johannes Greven · Lampertheim, DE
Arnulf Jeck · Neustadt, DE
Rudolf Magin · Schifferstadt, DE
Guenther Nick · Schifferstadt, DE
Paul Schaffarczyk · Speyer, DE
Guenther Weiss · Monsheim, DE

Key dates

Filing date	Dec 11, 1981
Grant date	May 15, 1984
Priority date	—
Expiry date	Dec 11, 2001

Classification

Technology area (CPC G)Physics
CPC primaryG01N19/08
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

For the purpose of monitoring the formation and propagation of cracks in machine parts and components, especially in the rotating shafts of prime movers and mechanical equipment, at least one hole is drilled in the uncracked section of the component, this drilled hole intersecting the plane of the crack which is to be expected and being filled with a gas or a liquid, the gas or liquid being adjusted to a pressure above the ambient pressure, and the drilled hole being provided with a closure with respect to the environment and being connected, via a line, to an instrument for indicating a fall in the pressure of the medium present in the drilled hole.

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