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. 28, 2015
Filed:
Sep. 23, 2011
Tae Goo Lee, Daejeon, KR;
Hyung Gil Park, Daejeon, KR;
Kwang Jun Paik, Daejeon, KR;
Dong Hyun Lee, Daejeon, KR;
Jin Suk Lee, Daejeon, KR;
Tetsuji Hoshino, Daejeon, KR;
Tae Goo Lee, Daejeon, KR;
Hyung Gil Park, Daejeon, KR;
Kwang Jun Paik, Daejeon, KR;
Dong Hyun Lee, Daejeon, KR;
Jin Suk Lee, Daejeon, KR;
Tetsuji Hoshino, Daejeon, KR;
Samsung Heavy Ind. Co., Ltd., Seoul, KR;
Abstract
Disclosed herein is a propulsion apparatus for ships. The propulsion apparatus, which includes a front propeller and a rear propeller to rotate in opposite directions and provides propulsion power to propel a hull of a ship, includes a power unit to supply power to rotate the rear propeller, a main shaft to transfer the power supplied from the power unit to the rear propeller, a hollow shaft extending in a longitudinal direction of the main shaft to allow the main shaft to pass therethrough and coupled to the front propeller, a drive motor including a rotor coupled to an outer circumferential surface of the hollow shaft and a stator supported by the hull, the drive motor rotating the hollow shaft in a direction opposite to a direction of rotation of the main shaft, and an electricity supply unit to supply electricity to the drive motor.