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:
Jun. 09, 1981
Filed:
Sep. 01, 1978
Applicant:
Inventors:
Kenichi Mabuchi, Matsudo, JP;
Tatsuo Katsunuma, Matsudo, JP;
Assignee:
Mabuchi Motor Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B64C / ;
U.S. Cl.
CPC ...
244 1721 ; 46 75 ; 416 43 ;
Abstract
A model helicopter device wherein a countertorque generated in the helicopter body by changes in the revolution of a main rotor is canceled by substantially detecting the acceleration of the revolution of the main rotor and automatically adjusting the pitch of tail rotor blades in accordance with the detected acceleration.