Patents Assigned to Hapman, Inc.
  • Tensioning device for drag conveyor
    Patent number: 7980384
    Abstract: An automatic chain tensioner for a tubular drag conveyor tensions the conveyor chain hydraulically utilizing an air-over-oil hydraulic system. A hydraulic cylinder acts on chain idler sprocket to tension the chain.
    Type: Grant
    Filed: April 30, 2009
    Date of Patent: July 19, 2011
    Assignee: Hapman, Inc.
    Inventor: Floyd C. Phalen
  • Portable self-contained screw conveyor
    Patent number: 7866456
    Abstract: A portable screw conveyor includes a conveyor boom assembly carrying a conveyor and supported by a portable base having wheels located at each corner of the base which provides support for the conveyor boom assembly. An actuator system preferably with a linear actuator, is provided between the conveyor boom assembly and the portable base to raise and lower one end of the conveyor boom assembly. A conveyor boom assembly preferably carries a flexible screw conveyor.
    Type: Grant
    Filed: November 2, 2007
    Date of Patent: January 11, 2011
    Assignee: Hapman, Inc.
    Inventors: Donald R. Bauman, Brent D. Root