Patent · US Expired

Recovery of sediments from the bottom of the sea

US4386473A · kind A · utility

12Cited by

8References

16Claims

0Family size

Assignee

Preussag Aktiengesellschaft

Inventors

Hans Amann · Hannover, DE
Jurgen Burkhardt · Burgkirchen an der Alz, DE
Klaus Luck · Diez, DE
Fritz O. Poeppel

Key dates

Filing date	Oct 17, 1980
Grant date	Jun 7, 1983
Priority date	—
Expiry date	Oct 17, 2000

Classification

Technology area (CPC E)Fixed Constructions
CPC primaryE21C50/00
WIPO fieldCivil engineering
WIPO sectorOther fields

Abstract

In a method and apparatus for the recovery of sediments from the sea bottom, a suction head having a mouth is lowered into the sediment, raised from the sediment to form a depression, laterally moved to a new location adjacent the first depression, and the cycle is repeated to form a new depression. The suction head includes loosening means in the form of a worm or flukes which exert a low frictional resistance with respect to the sediment during lowering of the suction head and high frictional resistance when the head is being raised from the sediment.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.