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:
Sep. 21, 2004
Filed:
Jan. 14, 2003
Yoshio Saito, Kiyose, JP;
Masanori Endo, Inagi, JP;
Yukio Matsuda, Kodaira, JP;
Nanahisa Sugiyama, Kashiwa, JP;
Takeshi Tagashira, Higashikurume, JP;
National Aerospace Laboratory of Japan, Tokyo, JP;
Abstract
A low-noise separated core engine type turbofan engine is provided in which noise generated by a control propulsion device is reduced by using high pressure air as the working fluid of a turbine for driving a control fan used in the attitude control of the airframe. A control fan of a separated core engine type turbofan engine , which is comprised in a control propulsion device provided for attitude control of the aircraft, is driven by an air turbine which uses as working fluid high pressure air compressed by a compressor of the core engine and supplied through a duct . The speed of the working fluid which is discharged from the control fan and air turbine is sufficiently low for attitude control and not as high as the speed of the working fluid which is discharged from a propulsion device which is provided for thrust, and thus noise generated by the control propulsion device can be reduced.