Lifting body for diving
US4498408A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 16, 1982 |
| Grant date | Feb 12, 1985 |
| Priority date | — |
| Expiry date | Jul 16, 2002 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB63C7/10
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
Lifting body for transporting or lifting objects under water, of the type in which the lifting gas has essentially the same pressure as the surrounding mass of water. The lifting body comprises a pressure measuring instrument which provides a depth position signal, which is arranged to be compared with a desired depth signal and produces a signal which indicates the required force for controlling the position. The desired thus computed command value is compared with the actual exerted lifting force, via a dynamometer, the signal of which is sent via a high pass filter. By thus arranging a double control system with a position loop and a force loop, it is possible to achieve stable control.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.