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:
Sep. 02, 2003
Filed:
Jun. 04, 2002
Norges Geotekniske Institutt, Oslo, NO;
Abstract
A seismic shear wave generator comprising a seismic wave source ( ) arranged on a base plate ( ) arranged for being placed at the seabed, and a coupling device ( ) arranged for coupling the wave source ( ) mechanically to the seabed in order for shear waves to be transmitted to the seabed. The novelty of the invention is as follows: a cylindrical skirt ( ) closely arranged along the base plate's ( ) circumference and extending down from the underside of the base plate ( ), and open downwards, and a pump device ( ) arranged for pumping water respectably out of, and into, the skirt ( ) and form vacuum or overpressure, respectively, in a closed cavity formed by the skirt ( ) and the base plate ( ) and the seabed ( ) is lowered onto the seabed. By means of the device mentioned above the shear wave generator may be suctioned fixed to the sea bed and thus transfer shear waves via the skirt ( ) to the seabed.