Switch stoneblower
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United States of America Patent
Stats
-
Jan 1, 2002
Grant Date -
Nov 22, 2001
app pub date -
Aug 2, 1999
filing date -
Aug 2, 1999
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A track maintenance vehicle having a workhead that is pivotally mounted to the superstructure at its upper end. The workhead includes a blowing tube mounted at its lower end and a vertical cylinder that is selectively extendable and retractable to control the height of the blowing tube. The vehicle includes a control system that controls the height of the blowing tube as well as the left/right and fore/aft positions of the workhead. The track maintenance vehicle further includes an automated height control system that automatically extends and retracts the vertical cylinder to position the blowing tube at a uniform height despite its lateral disposition.
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