Patents by Inventor Ruben Hartmeister

Ruben Hartmeister 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).

  • Aerifier core mulcher
    Patent number: 5983560
    Abstract: A sod plug mulcher is towed behind a sod plugger preferably on a golf course, park land, or grass playing surfaces. The sod plugger punches holes in the turf and creates sod plugs. The sod plug mulcher catches the sod plugs and processes them into a fine mulch. The sod plug mulcher has a roller assembly to flatten the sod plugs. Then a series of spinning hammer blades chop the flattened sod plugs into a mulch inside a rotating drum. A spreader tray then throws the mulch back onto the golf course.
    Type: Grant
    Filed: October 10, 1997
    Date of Patent: November 16, 1999
    Inventor: Ruben Hartmeister
  • Keyhole rod bender
    Patent number: 5389099
    Abstract: A pair of surgical in situ rod benders having keyhole notches to prevent slipping off the rod while in use. The in situ benders also have a 20.degree. offset angle to allow a criss-cross pushing tension during bending. A flat tapered handle helps the surgeon counter rotational torques during bending.
    Type: Grant
    Filed: July 28, 1993
    Date of Patent: February 14, 1995
    Inventors: Ruben Hartmeister, Walter E. Strippgen