Patent · US Active

Ceramic pressure measuring cell and method for its manufacture

US9816887B2 · kind B2 · utility

1Cited by

6References

14Claims

0Family size

Assignee

ENDRESS+HAUSER GMBH+CO.KG · DE

Inventors

Andrea Berlinger · Baden-Baden, DE
Ulfert Drewes · Bad Hersfeld, DE
Andreas Rossberg · Bad Säckingen, DE
Elke Schmidt · Bad Säckingen, DE
Thomas Uehlin · Schopfheim, DE

Key dates

Filing date	Feb 10, 2012
Grant date	Nov 14, 2017
Priority date	—
Expiry date	Jun 3, 2034

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC04B2237/708
WIPO fieldMachine tools
WIPO sectorMechanical engineering

Abstract

A method for manufacturing a pressure measuring cell, which has a ceramic platform and a ceramic measuring membrane, wherein the measuring membrane is joined with the platform pressure tightly by an active hard solder, or braze, wherein the method includes: providing the platform, the measuring membrane and the active hard solder, or braze, positioning the active hard solder, or braze, between the platform and the measuring membrane; melting the active hard solder, or braze, by irradiating the active hard solder, or braze, by a laser, wherein the irradiating of the active hard solder, or braze, occurs through the measuring membrane; and letting the active hard solder, or braze, solidify by cooling.

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