Telescopic boom extension device
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United States of America Patent
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Jun 27, 2017
Grant Date -
Aug 25, 2016
app pub date -
Feb 4, 2016
filing date -
Feb 24, 2015
priority date (Note) -
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status (Latency Note)
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Abstract
A telescopic boom extension device includes a driving mechanism. The driving mechanism that drives B pins and a C pin includes a hydraulic supply part and a drive source generation part. The drive source generation part generates a predetermined hydraulic pressure at the hydraulic supply part based on a pneumatic pressure. The hydraulic supply part has an accumulator and AOHs and supplies a hydraulic pressure to a cylinder-boom coupling mechanism and an inter-boom fixing mechanism. The drive source generation part uses a pneumatic supply part to send compressed air to the hydraulic supply part.
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