Patents by Inventor Martin H. Lufkin

Martin H. Lufkin 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 redundant force retention system for VTOL and VSTOL aircraft
    Patent number: 5059094
    Abstract: The system comprises a grip of composite material having belts, filament windings unidirectional material and fillers of off axis bias ply material for directing the CF exerted on the grip by the blade rotation to the clevis throat of the grip. The force is further directed through a CF fitting, a CF bearing and an OPCBA to the yoke, thereby maintaining the yoke in tension. Should this load path fail, the CF will be transmitted through the length of the grip to the IPCBA that will in turn load the yoke with the CF.
    Type: Grant
    Filed: October 13, 1989
    Date of Patent: October 22, 1991
    Assignee: Bell Helicopter Textron, Inc.
    Inventors: Madison K. Robinson, Martin H. Lufkin, William D. Neathery