Telescopic boom extension device
US9688519B2 · kind B2 · utility
3Cited by
9References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 4, 2016 |
| Grant date | Jun 27, 2017 |
| Priority date | — |
| Expiry date | Feb 4, 2036 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB66C23/22
- WIPO fieldHandling
- WIPO sectorMechanical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.