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:
Aug. 27, 2002
Filed:
Aug. 28, 2001
Mark William Dreith, Houston, TX (US);
Darryl Scott Brittin, Katy, TX (US);
Global Marine, Inc., Houston, TX (US);
Abstract
A floating marine structure, such as a drillship ( ) includes at least one thruster ( e.g.) which includes a thruster head ( ) having a propeller ( ) which is adjustable to vary the angular relation to the drillship hull ( ) of the horizontal direction of thrust produced by operation of the thruster. The thruster includes an enclosure ( ) above the propeller for a propeller drive motor ( ). The thruster has a deployed position in which the propeller ( ) is submerged below adjacent exterior surfaces of the hull. The thruster is retractable vertically into the hull to retracted position where the propeller is below the floating waterline ( ) of the hull. Further, the thruster has a more elevated service position to which the thruster is movable vertically from its retracted position. At the service position, the propeller ( ) is accessible at a location above the floating waterline so that maintenance and repair of the thruster can be performed efficiently and the thruster can be returned quickly to its deployed position.