Patent · US Expired

Device to protect against flow of current

US4175255A · kind A · utility

7Cited by

5References

5Claims

0Family size

Inventors

Sven Linnman · Åkersberga, SE
Peter Isoz · Huskvarna, SE
Nils P. Branderud · Uppsala, SE
Per E. C. Udden · Timrå, SE

Key dates

Filing date	Sep 6, 1977
Grant date	Nov 20, 1979
Priority date	—
Expiry date	Sep 6, 1997

Classification

Technology area (CPC H)Electricity
CPC primaryH02H5/12
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A protective device to interrupt the flow of current at a work place when current of a magnitude to endanger life flows through the body of a person whereby at least two electrodes with skin contact are applied on a person which electrodes are connected to a voltage sensor which determines the voltage difference between the electrodes when current flows through the body and is designed to release a signal to a circuit breaking device which interrupts the flow of current when the current passing through the body exceeds the admissible value.

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