Lifting truck with displaceable masts and balancing cylinder
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United States of America Patent
Stats
-
Feb 13, 2007
Grant Date -
Dec 18, 2003
app pub date -
Jun 3, 2003
filing date -
Jun 5, 2002
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A lifting truck with a telescoping mast and a balancing cylinder is disclosed. The stages of the mast are each constructed with three vertical beams. A mechanism for extending the mast are contained in or near the side beams. The balancing cylinder exerts an upward force to counter the dead weight of the telescoping stages and other parts of the truck that are lifted. The balancing cylinder is connected to the lower portion of the first stage and the upper portion of the second stage. The beams making up the stages of the mast can be tubular or U-shaped to allow space for the balancing cylinder and/or hydraulic lines or control leads.
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