Patent · US Expired

Damper for tap-changer vacuum switch

US6347615B1 · kind B1 · utility

5Cited by

7References

2Claims

0Family size

Assignee

MASCHINENFABRIK REINHAUSEN GMBH · DE

Inventors

Klaus Hopfl · Maxhütte-Haidhof, DE
Silke Wrede · Zeitlarn, DE

Key dates

Filing date	Jul 6, 2000
Grant date	Feb 19, 2002
Priority date	—
Expiry date	Jul 6, 2020

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T137/7929
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A tap-changer vacuum switch having an actuating rod extending and displaceable along an axis is provided with a damper having a damper housing offset from and fixed relative to the vacuum switch, and a rod piston fixed on the valve-actuating rod, in the damper housing, and defining in the damper housing a compartment whose volume changes as the rod piston moves axially with the rod. The damper housing is formed with a pair of radially open ports opening into the compartment. An in-only check valve fitted to one of the ports only permits fluid flow into the compartment, and an out-only check valve fitted to the other port only permits fluid flow out of the compartment.

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