Hydraulic boom compensation system for aerial devices
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
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Aug 31, 1999
Grant Date -
N/A
app pub date -
Sep 19, 1997
filing date -
Sep 19, 1997
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An upper boom compensation system for an aerial device having an articulating boom assembly. The lower boom is raised and lowered by a special double cylinder having two pistons and a common piston rod. A hydraulic circuit is arranged to transfer fluid between the lower boom cylinder and the upper boom cylinder in a manner to raise and lower the upper boom correspondingly to raising and lowering of the lower boom. The upper boom can also be controlled independently of the lower boom.
First Claim
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