Hydraulic crane
US7523835B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 20, 2005 |
| Grant date | Apr 28, 2009 |
| Priority date | — |
| Expiry date | Jan 24, 2027 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB66C23/90
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
The invention relates to a method for determining a present value of the capacity level of a hydraulic crane (1) provided with a lifting cylinder (8), the present value of the capacity level being determined by means of a processing unit (33). The initiation of each new lifting cycle of the crane is detected and a minimum value of each lifting cycle is registered, which represents the lowest hydraulic pressure on the piston side (8a) of the lifting cylinder during the lifting cycle or the lowest cylinder force of the lifting cylinder during the lifting cycle. For at least some of the lifting cycles, the processing unit (33) determines the present value of the capacity level of the crane taking into account a control value (Vc) corresponding to: The invention also relates to a hydraulic crane (1) comprising means for implementing the inventive method.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.