Patents by Inventor Donald P. Gellert

Donald P. Gellert 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).

  • Patent number: 5026007
    Abstract: The present invention relates to a control system for tethering an airborne object such as a kite or an airplane. The system in its simplest form has an anchor which attaches to a pair of lines which in turn pass through a control bar. The control bar has a first end and a second end and centrally engages the lines. The lines pass through the control bar and are separated and directed to said first end and said second end of said control bar from which said lines advance to the airborne object. The present invention is to provide a control system for controlling kites and airplanes that will allow the lines to be altered in length without destabilizing the kite or plane being controlled and will provide a controller which serves as an accelerator assisting in the process of launching a kite thereby allowing the kite to be flown in winds otherwise too light to make flying possible.
    Type: Grant
    Filed: March 2, 1990
    Date of Patent: June 25, 1991
    Inventor: Donald P. Gellert
  • Patent number: 4969615
    Abstract: The present invention is for a kite which in its simplest form has a first edge spar and second edge spar which are equal in length and attaching to a flexible coupling such that when the coupling is in its neutral position the attached spars are substantially orthogonal. A header spar shorter than the first edge spar and the second edge spar engages the flexible coupling such that at the rest position the angle between the first edge spar and the header spar is equal to the angle between the second edge spar and the header spar. A sail covering the spars forms a central delta sail surface with a first triangular elevator panel and a second triangular elevator panel attached thereto. The first and second edge spars bound two sides of the central delta sail surface. The first and second triangular elevator panels have one of their sides bounded by an edge spar and a second side bounded by the header spar.
    Type: Grant
    Filed: March 2, 1990
    Date of Patent: November 13, 1990
    Inventor: Donald P. Gellert
  • Patent number: 4074704
    Abstract: This disclosure is concerned with the collection and concentration of solar ray energy and the like through optimal use of prismatic and reflective concentration thereof.
    Type: Grant
    Filed: May 28, 1976
    Date of Patent: February 21, 1978
    Inventor: Donald P. Gellert
  • Patent number: 3983666
    Abstract: A shelter structure constructed of a plurality of modules or lobes each of which includes a pair of triangular panels having curved edges connected together with the apices thereof spread apart and supported by pedestals in elevated relation to a supporting surface. Adjacent edges of the lobes or modules are secured together by a connector and the pedestals are secured to the lower apices of the modules by splice plate assemblies. The lobes or modules are assembled into a building or shelter structure by a unique manipulative procedure to facilitate the construction of a shelter on site thus enabling the modules to be conveyed to the site in a partially assembled condition and then expeditiously set-up and assembled into a shelter structure.
    Type: Grant
    Filed: February 13, 1975
    Date of Patent: October 5, 1976
    Assignee: Foreverly Development Corporation
    Inventor: Donald P. Gellert