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:
May. 05, 1992
Filed:
Nov. 08, 1990
Applicant:
Inventors:
Yuji Fujihara, Osaka, JP;
Masaru Ando, Osaka, JP;
Assignee:
Keyence Corporation, Osaka, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
A63H / ;
U.S. Cl.
CPC ...
446 34 ; 446 36 ; 446 37 ;
Abstract
In a propeller blade tip path plane-inclining device for a toy helicopter, a propeller is disposed asymmetrically with respect to a rotation shaft, and the position of the propeller in the plane of rotation of the propeller is detected, and the speed of rotation of the propeller is increased and decreased at predetermined regions so as to change the flexing of the propeller caused by a difference in the rotational speed, so that the propeller blade tip path plane is inclined, thereby determining the direction of the force of propulsion of a fuselage.