Device for displacing the moveable parts of rail switches or crossings
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United States of America Patent
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-
Jun 11, 2002
Grant Date -
N/A
app pub date -
Dec 11, 2000
filing date -
Apr 7, 1998
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
In a device for displacing the movable parts of rail switches or crossings, in which a plurality of hydraulic cylinder piston units engaging in an offset manner in the longitudinal direction of the rails are each connected in series, at least one directional or seat valve (9) capable of being adjusted in a pressure controlled manner is inserted in the duct (8) that connects the hydraulic cylinder piston units (1 to 4) arranged in series, which directional or seat valve blocks the connection to the consecutive cylinder piston unit if a preset differential pressure is exceeded.
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