Patents by Inventor Ron Sheltra

Ron Sheltra 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: 4915377
    Abstract: A multipurpose exercise machine for accomplishing progressive resistance exercises.
    Type: Grant
    Filed: October 17, 1988
    Date of Patent: April 10, 1990
    Assignee: Marcy Fitness Products
    Inventors: Parker Malnke, Ron Sheltra
  • Patent number: 4793608
    Abstract: A multipurpose exercise machine for accomplishing progressive resistance exercises.
    Type: Grant
    Filed: October 8, 1986
    Date of Patent: December 27, 1988
    Assignee: Marcy Fitness Products
    Inventors: Parker E. Mahnke, Ron Sheltra
  • Patent number: 4744559
    Abstract: A free-standing multi-station progressive resistance exercise apparatus which is small, light weight, highly versatile and easy to use. The apparatus includes a main frame comprising a central guide column, a carriage movable upwardly and downwardly along the central guide column, a stack of weights disposed below the carriage, a selector bar extending between the weights and the carriage for interconnecting a selected number of weights with the carriage, a body engaging handlebar connected to the carriage for vertical movement of the carriage relative to the guide column; a second frame including back to back guide tracks for guiding the vertical travel of first and second sheaves and first and second cable systems operably connected to a plurality of remote body engaging members for use in performing a wide variety of arm and leg exercises, the cable systems interconnecting the body engaging members with the weights via the sheaves and the carriage.
    Type: Grant
    Filed: July 28, 1986
    Date of Patent: May 17, 1988
    Assignee: Marcy Gymnasium Equipment Co.
    Inventors: Parker E. Mahnke, Ron Sheltra
  • Patent number: D298057
    Type: Grant
    Filed: March 4, 1985
    Date of Patent: October 11, 1988
    Assignee: Marcy Gymnasium Equipment Co.
    Inventors: Parker E. Mahnke, Ron Sheltra
  • Patent number: D298641
    Type: Grant
    Filed: April 10, 1986
    Date of Patent: November 22, 1988
    Assignee: Marcy Gymnasium Equipment Co.
    Inventor: Ron Sheltra
  • Patent number: D300047
    Type: Grant
    Filed: February 24, 1986
    Date of Patent: February 28, 1989
    Inventor: Ron Sheltra