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. 16, 2008
Filed:
May. 23, 2002
William R. Mcdonnell, St. Louis, MO (US);
William R. McDonnell, St. Louis, MO (US);
McDonnell Helicopter Company LLC, St. Louis, MO (US);
Abstract
The current invention relates primarily to the control of rotary wing and fixed wing aircraft where a small electric actuator () changes the pitch on a small aerodynamic surface () and the resulting airloads on said small aerodynamic surface are used to change the pitch on a significantly larger aerodynamic surface (). In the preferred embodiment the resulting airloads on said larger aerodynamic surface is then used to change the pitch on a still larger aerodynamic surface (). As a result small electric actuators are capable of moving and controlling large aircraft control surfaces with an effective two step amplification of power utilizing the energy in the airstream. The current invention also discloses means to control and prevent undesirable motion of said aerodynamic surfaces.