Patents by Inventor Cecil Covington

Cecil Covington has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Rotor system vibration absorber
    Publication number: 20060222505
    Abstract: A rotor system vibration absorber for use with a helicopter of other rotocraft is disclosed in which spring forces are provided by a plurality of elongated rods (73) arranged in a selected pattern. The rods are coupled at one end to a fixed base (79) that is coupled to a rotor hub (55), and at the other end to a tuning weight (81).
    Type: Application
    Filed: April 19, 2002
    Publication date: October 5, 2006
    Inventors: Ajay Sehgal, Michael Smith, Frank Stamps, Bryan Marshall, Cecil Covington, Peggy Covington
  • Multi-bladed tail rotor hub design for coriolis relief
    Patent number: 6764280
    Abstract: A multi-bladed tail rotor assembly is disclosed that provides higher aerodynamic performance, damage tolerant design with 10,000-hour life expectancy, and which requires low maintenance through the use of composites and elastomerics. The tail rotor hub assembly includes two stacked yoke assemblies having multi-bladed teetering rotors, each mounted on a single drive mast. Each yoke assembly includes a yoke hub having a transverse bore therethrough, a bearing assembly disposed within the bore, and retention means for aligning and securing the bearing assembly within the bore. Each bearing assembly includes a trunnion portion having trunnion arms that extend outwardly from a trunnion body portion, and an elastomeric bearing disposed about each trunnion arm. The tail rotor assembly utilizes a composite twist strap flexure to accommodate collective pitch control integral with each rotor blade.
    Type: Grant
    Filed: March 4, 2002
    Date of Patent: July 20, 2004
    Assignee: Bell Helicopter Textron Inc.
    Inventors: Ajay Sehgal, Cecil Covington, David Haynie, Joseph Zierer, Eric Boyle
  • Multi-bladed tail rotor hub design for coriolis relief
    Publication number: 20020136636
    Abstract: A multi-bladed tail rotor assembly is disclosed that provides higher aerodynamic performance, damage tolerant design with 10,000-hour life expectancy, and which requires low maintenance through the use of composites and elastomerics. The tail rotor hub assembly includes two stacked yoke assemblies having multi-bladed teetering rotors, each mounted on a single drive mast. Each yoke assembly includes a yoke hub having a transverse bore therethrough, a bearing assembly disposed within the bore, and retention means for aligning and securing the bearing assembly within the bore. Each bearing assembly includes a trunnion portion having trunnion arms that extend outwardly from a trunnion body portion, and an elastomeric bearing disposed about each trunnion arm. The tail rotor assembly utilizes a composite twist strap flexure to accommodate collective pitch control integral with each rotor blade.
    Type: Application
    Filed: March 4, 2002
    Publication date: September 26, 2002
    Inventors: Ajay Sehgal, Cecil Covington, David Haynie, Joseph Zierer, Eric Boyle, Peggy Covington