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. 14, 1990
Filed:
Apr. 07, 1989
Applicant:
Inventors:
Hubert Grieb, Germering, DE;
Helmut-Arnd Geidel, Karlsfeld, DE;
Assignee:
Primary Examiner:
Int. Cl.
CPC ...
F02K / ; F02C / ;
U.S. Cl.
CPC ...
602261 ; 60268 ; 60 39162 ; 416129 ; 4161 / ; 74DI / ;
Abstract
A propfan turbo-engine has two shrouded propfan rotors arranged upstream of a gas turbine which are driven by a contra-rotating working turbine. In addition to a favorable flow onto the blades, a low weight of the engine can be achieved.