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. 05, 1986
Filed:
Jun. 20, 1984
Applicant:
Inventors:
Lennart H Brandt, Fjar.ang.s, SE;
Heinz Pichl, Upsala, SE;
Assignee:
AB Volvo Penta, Gothenburg, SE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B63H / ; B64C / ;
U.S. Cl.
CPC ...
416128 ; 416129 ; 415 68 ;
Abstract
The invention relates to a rotor device, preferably a boat propeller device. The propeller shaft drives, via a planetary gear system, two propellers in the rotational direction of the shaft and one propeller counter to the rotational direction of the shaft. The propellers are dimensioned so that they absorb approximately equal torques.