Patent · US Expired

Ceramic transport shaft with metal end cap, particularly for glass melting furnaces, with heat expansion compensation

US5048168A · kind A · utility

15Cited by

8References

6Claims

0Family size

Assignee

Saint-Gobain Vitrage International · FR

Inventors

Luc Vanaschen · Eupen, BE
Hans-Werner Kuster · Aachen, DE
Hubert Havenith · Würselen, DE
Gerhard Schubert · Jena, DE

Key dates

Filing date	Jul 17, 1990
Grant date	Sep 17, 1991
Priority date	—
Expiry date	Jul 17, 2010

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF16D2001/062
WIPO fieldMechanical elements
WIPO sectorMechanical engineering

Abstract

A ceramic transport shaft for a furnace includes a ceramic shaft member and a metal end cap into which an end of the shaft member is fitted with an annular gap between the shaft member and the end cap. A sleeve fills the gap. The shaft member, the end cap and the sleeve have such linear thermal coefficients of expansion, and the wall of the sleeve has such a radial thickness, that a change in the radial size of the gap due to thermal expansion of the shaft member and the end cap is at least equalled by a change in the radial thickness of the sleeve wall. The sleeve has one or more axial slots to absorb the circumferential expansion thereof during heating.

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