The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 16, 2012
Filed:
Oct. 31, 2008
Applicant:
Bruno Tack, Assenede, BE;
Inventor:
Bruno Tack, Assenede, BE;
Assignee:
Dredging International N.V., Zwijndrecht, BE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E02F 3/94 (2006.01);
U.S. Cl.
CPC ...
Abstract
A drag head of a trailing suction hopper dredger. The drag head comprises a rotatable visor connected to a suction pipe for discharging soil via the suction opening of the visor, wherein the visor is provided with a catching construction for undesirable objects. The catching construction closes the suction opening except for passage openings, wherein at least a number of passage openings have a variable passage area. A method for breaking up and/or dredging at least partially hard grounds under water using a trailing suction hopper dredger equipped with a drag head.