Patent · US Active

Method and device for reliably monitoring a closed position of two parts moveable relative to one another

US7548159B2 · kind B2 · utility

7Cited by

3References

12Claims

0Family size

Assignee

Pilz GmbH & Co. KG · DE

Inventors

Juergen Pullmann · Großenhain, DE
Christoph Zinser · Wolfschlugen, DE
Thomas Nitsche · Eßlingen, DE

Key dates

Filing date	Jan 13, 2006
Grant date	Jun 16, 2009
Priority date	—
Expiry date	Jan 30, 2027

Classification

Technology area (CPC H)Electricity
CPC primaryH03K2217/958
WIPO fieldBasic communication processes
WIPO sectorElectrical engineering

Abstract

A device for reliably monitoring a closed position of two parts which can move relative to one another has an actuator and a sensor. The device is particularly used for monitoring the closed position of a protective door installed for safeguarding a technical installation which operates in an automated fashion. The sensor has a receiver circuit at an input side, which circuit generates a defined receiver circuit signal when a switching distance between the sensor and the actuator is fallen short of. A detector circuit provides an enable signal when the defined receiver circuit signal is present. According to one aspect of the invention, a test element is provided for selectively suppressing the defined receiver circuit signal.

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