Patents by Inventor Craig Daniel Block

Craig Daniel Block 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).

  • Chain driven conveyor having automatic tensioning street sweeping method and system
    Patent number: 7520378
    Abstract: Disclosed herein is a street sweeper having a vertical chain driven conveyor apparatus. The vertical chain driven conveyor apparatus is provided with a jointed shaft to compensate for chain wear over the life of the chains. The vertical chain driven conveyor apparatus is provided with an automatically adjusting chain tension adjustment system. The vertical chain driven conveyor apparatus is provided with locking adjustment mechanism to prevent the chains from losing tension when the sweeper is turned off. An initialization program is operable to restore chain tension when the street sweeper is started and prevent sweeping operations until a desired chain tension has been indicated.
    Type: Grant
    Filed: May 17, 2004
    Date of Patent: April 21, 2009
    Assignee: Tennant Company
    Inventors: Karl Robert Hansen, Craig Daniel Block
  • Chain driven conveyor having automatic tensioning street sweeping method and system
    Publication number: 20040226122
    Abstract: Disclosed herein is a street sweeper having a vertical chain driven conveyor apparatus. The vertical chain driven conveyor apparatus is provided with a jointed shaft to compensate for chain wear over the life of the chains. The vertical chain driven conveyor apparatus is provided with an automatically adjusting chain tension adjustment system. The vertical chain driven conveyor apparatus is provided with locking adjustment mechanism to prevent the chains from losing tension when the sweeper is turned off. An initialization program is operable to restore chain tension when the street sweeper is started and prevent sweeping operations until a desired chain tension has been indicated.
    Type: Application
    Filed: May 17, 2004
    Publication date: November 18, 2004
    Applicant: Tennant Company
    Inventors: Karl Robert Hansen, Craig Daniel Block