Patent · US Expired

Level gauge for oil-filled transformers, chokes and tap changers

US6708562B2 · kind B2 · utility

13Cited by

6References

7Claims

0Family size

Assignee

Messko Albert Hauser GmbH & Co. KG · DE

Inventors

Werner Krüger · Birkenfeld, DE
Karsten Viereck · Teisendorf, DE

Key dates

Filing date	Nov 19, 2002
Grant date	Mar 23, 2004
Priority date	—
Expiry date	Dec 12, 2022

Classification

Technology area (CPC H)Electricity
CPC primaryH01F27/14
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A liquid level indicator for an oil-filled transformer, power choke or tap changer in which a sensor part has a float which rises and falls with the oil level and rotates a sensor shaft and the sensor shaft is coupled to an indicator shaft on which a pointer is provided to cooperate with a dial. The gauge also includes a contactless angle encoder operating with a magnetic hub and coupled to the indicator shaft for outputting a signal representing the oil level.

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