Patent · US Expired

Safety switch for reliably switching off a dangerous device

US7504747B2 · kind B2 · utility

6Cited by

9References

18Claims

0Family size

Assignee

Pilz GmbH & Co. KG · DE

Inventors

Jürgen Pullmann · Großenhain, DE
Christoph Zinser · Wolfschlugen, DE
Klaus Stark · Witten, DE

Key dates

Filing date	Apr 13, 2006
Grant date	Mar 17, 2009
Priority date	—
Expiry date	Apr 13, 2026

Classification

Technology area (CPC H)Electricity
CPC primaryH03K2217/958
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A safety switch for reliably switching off a dangerous device has an actuator which can be moved between a first position and at least one second position. It also has a detector for detecting the actuator in at least one of the said positions. The detector comprises a transponder with an individual transponder identification and a reading unit for reading out the transponder identification. The transponder and the reading unit are arranged relative to one another such that the reading unit is capable of reading out the transponder in the first position of the actuator but not in its second position.

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