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:
Jan. 26, 1999
Filed:
Dec. 05, 1996
Philippe Alain Rollet, Velaux, FR;
Paul Gerard Eglin, Aix en Provence, FR;
Eurocopter, Marignane Cedex, FR;
Abstract
A cyclic stick system for a helicopter or other aircraft includes memories for holding minimum and maximum speed values, a comparator for comparing an air speed V1 with the minimum and maximum speed values, a router for selecting either the air speed V1 or a quiescent speed, a subtracter for obtaining a difference between the output of the router and a reference speed, another router for selecting between the difference and a signal representing an orientation of the stick, and a switch for selecting times when the air speed V1 is to be stored as the reference speed. On the basis of the air speed V1 and under the control of the device for retrimming said cyclic stick, the system acts on the motorization of stick in order to confer on the helicopter apparent longitudinal static stability in terms of forces on the cyclic stick so that to accelerate (or decelerate) and maintain a new higher (or lower) speed. The force applied to the cyclic stick is always in the direction of pushing (or of pulling) outside of any deliberate retrimming action.