Change-over valve, preferably for a railway vehicle
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United States of America Patent
Stats
-
Mar 30, 1982
Grant Date -
N/A
app pub date -
Apr 26, 1979
filing date -
Sep 1, 1977
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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