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:
Apr. 01, 2014
Filed:
May. 20, 2009
Martin Thompson, Cambridgeshire, GB;
Mark Francis Lucien Harper, Cambridgeshire, GB;
Martin Thompson, Cambridgeshire, GB;
Mark Francis Lucien Harper, Cambridgeshire, GB;
BP Exploration Operating Company Limited, Middlesex, GB;
Abstract
A very low frequency marine seismic source has a reservoir of water () feeding water to an aperture communicating with the surrounding water (). The rate of water flow through the aperture is controlled by a rotor disc () and stator disc () having holes which overlap to a greater or lesser extent as the rotor rotates. The modulation of the flow of water produces a modulated pressure signal which is radiated into the surrounding water. The device is intended to produce acoustic signals over a band extending down to 0.5 Hz or lower.