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. 30, 1989
Filed:
Oct. 05, 1987
Robert J Ewy, Olathe, KS (US);
Gary L Burrell, Olathe, KS (US);
Allied-Signal Inc., Morris Township, Morris County, NJ (US);
Abstract
A dual channel actuator for regulating control surfaces of an aircraft such as a helicopter. Primary and secondary channels are coupled by a differential gear. An internal stop in the differential gear limits the short term range of travel or authority of the primary channel. The secondary channel allows extended long term authority by recentering the reference point about which the rotational range of the primary channel is determined. A servo motor and primary input gear of the differential gear comprise the primary channel. A second servo motor and secondary input gear comprise the secondary channel. The reference point comprises a stop pin coupled with said differential gear.