Patents by Inventor Warren J. Christensen

Warren J. Christensen 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: 6691887
    Abstract: A rake storage system to store a rake adjacent a sand trap of a golf course, and to selectively elevate the rake for use, includes an elongated container to be disposed underground adjacent the sand trap in a substantially vertical orientation. A rake is removably disposed within the elongated container. A mechanical lifting mechanism is disposed in the elongated container to elevate the rake. A releasable retaining mechanism is disposed in the container to retain the rake in the container, and includes a lip formed in the container, and a protrusion disposed on the rake near the distal end adjacent the rake head. The protrusion is engagable with the lip to retain the rake in the container when the rake is disposed in the container. A flange can be formed about the inside of the container. A collar can be disposed around the rake near a distal end adjacent a rake head to engage the flange when the rake is received within the container to substantially close the container below the flange and the collar.
    Type: Grant
    Filed: March 26, 2002
    Date of Patent: February 17, 2004
    Inventors: Warren J. Christensen, Dave Meyers
  • Publication number: 20020153267
    Abstract: A rake storage system to store a rake adjacent a sand trap of a golf course, and to selectively elevate the rake for use, includes an elongated container to be disposed underground adjacent the sand trap in a substantially vertical orientation. A rake is removably disposed within the elongated container. A mechanical lifting mechanism is disposed in the elongated container to elevate the rake. A releasable retaining mechanism is disposed in the container to retain the rake in the container, and includes a lip formed in the container, and a protrusion disposed on the rake near the distal end adjacent the rake head. The protrusion is engagable with the lip to retain the rake in the container when the rake is disposed in the container. A flange can be formed about the inside of the container. A collar can be disposed around the rake near a distal end adjacent a rake head to engage the flange when the rake is received within the container to substantially close the container below the flange and the collar.
    Type: Application
    Filed: March 26, 2002
    Publication date: October 24, 2002
    Inventors: Warren J. Christensen, Dave Meyers
  • Patent number: 6405891
    Abstract: A rake storage device for storing a rake adjacent a sand trap of a golf course, and for selectively elevating the rake for use, includes an elongated container disposed underground in a substantially vertical orientation. The rake is removably received within the container. The device includes lifting means for elevating the rake out of the container and above the surface. The lifting means can include a rake receiver and a counter-weight operatively coupled together and movably disposed in the elongated container.
    Type: Grant
    Filed: April 23, 2001
    Date of Patent: June 18, 2002
    Inventors: Warren J. Christensen, Jeffrey Christensen, Kip M. Colton, Stephen Matthew Haws, Michelle Elaine Lau, Janet Heidemarie Lehnardt, Kevin David Staples, Alaa Abu-Obeid, Len Pugh