Lifting body for diving

Details Lifting body for diving Lifting body for diving

1982-07-16

1985-02-12

Basinger, Sherman D.

Ships

Vessel raising and docking

Submerged

114 54, 244 97, 244 98, 244 99, B63C 710

Patent

active

044984081

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.

REFERENCES:
patent: 2313215 (1943-03-01), Bierlee
patent: 2635574 (1953-04-01), Sturtevant
patent: 2742246 (1956-04-01), Mellen
patent: 3112900 (1963-12-01), Yost
An article from "Svensk Sjofarts Tidnig" (Swedish Journal of Navigation) No. 37 of 1978.

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