Patent · US Expired

Change-over valve, preferably for a railway vehicle

US4321985A · kind A · utility

1Cited by

1References

8Claims

0Family size

Assignee

SAB Industri AB · SE

Inventors

Lars Severinsson · Hishult, SE
Ragnar Segersten · Ängelholm, SE

Key dates

Filing date	Apr 26, 1979
Grant date	Mar 30, 1982
Priority date	—
Expiry date	Apr 26, 1999

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB60T8/1893
WIPO fieldTransport
WIPO sectorMechanical engineering

Abstract

This invention relates to a change-over valve (or a so called empty-load valve), preferably for a railway vehicle, having a valve device opening or closing a pneumatic passageway depending on the position of a mechanical operating system or in other words the load on the vehicle. In order to improve the working range of the external operating arm and the exactness of the change-over point the operating system comprises a force transmitting chain from said operating arm to the valve device via a spring, a knee lever, and a valve operating rod structured in such a geometrical way that the axis of the spring is substantially perpendicular to the valve operating rod.

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