Patents by Inventor Eric Hjorth

Eric Hjorth 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).

  • Material cart for use on curved surface roofs
    Patent number: 6880838
    Abstract: A cart for transport of material, such as tools, equipment, supplies and the like on curved surface roofs of a building or other structure which as a varying or changing slope. The cart has a base frame mounted on rear wheels and forward casters. The base frame attaches by a rope or cable to an anchor point on the roof. An equipment basket is suspended at pivot points between supports extending above the base frame. The basket and its contents thus remain in a level, stable position on the roof as the cart is moved to various locations over the curved roof surface during use.
    Type: Grant
    Filed: September 18, 2002
    Date of Patent: April 19, 2005
    Assignee: STP Nuclear Operating Co.
    Inventor: Eric Hjorth
  • Material cart for use on curved surface roofs
    Publication number: 20040051267
    Abstract: A cart is provided for transport of material, such as tools, equipment, supplies and the like on curved surface roofs of a building or other structure which as a varying or changing slope. The cart has a base frame mounted on rear wheels and forward casters. The base frame attaches by a rope or cable to an anchor point on the roof. An equipment basket is suspended at pivot points between supports extending above the base frame. The basket and its contents thus remain in a level, stable position on the roof as the cart is moved to various locations over the curved roof surface during use.
    Type: Application
    Filed: September 18, 2002
    Publication date: March 18, 2004
    Inventor: Eric Hjorth