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:
Jul. 29, 2003
Filed:
Dec. 03, 2001
Applicant:
Inventors:
Benny Hedlund, Hönö, SE;
Kare Jonsson, Trollhättan, SE;
Assignee:
Other;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B63H 5/10 ;
U.S. Cl.
CPC ...
B63H 5/10 ;
Abstract
A boat propeller drive with an underwater housing which is connected in a fixed manner to a boat hull and has tractor propellers which are arranged on that side of the housing facing ahead and the blade areas of which are adapted to one another in such a manner that, at least under certain operating conditions, the aft propeller works in a cavity-generating manner whereas the fore propeller works in a cavitation-free manner.