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. 30, 2002
Filed:
Jul. 20, 2000
Applicant:
Inventor:
Chang Sun Kim, Inchun-Shi, KR;
Assignee:
Other;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F03D 1/04 ;
U.S. Cl.
CPC ...
F03D 1/04 ;
Abstract
A multi-stage propeller assembly including a barrel having a cylindrical actuation part and a tapered nozzle part, with the tapered nozzle part integrally extending from the cylindrical actuation part while being reduced in its diameter in a direction from one end around the actuation part to the other end. A drive engine for propellers is installed within the tapered nozzle part, with the drive shaft of the engine axially extending within the actuation part. A plurality of propellers are regularly set along the drive shaft to form the multi-stage propeller assembly. A plurality of fixed radial blade units are regularly set between the propellers.