Patents Assigned to Zimmco
  • Patent number: 6886838
    Abstract: The use of a pivotal coupling on a cart of the wheelbarrow type allows for a downwardly applied pressure to the user ends of the handles to tip the bucket to at least begin the dumping action of the cart. Following the initial downward pressure with the handles still elevationally displaced downward an upward lift applied to the user ends of the handles completes the dumping action of the cart. Use of multiple pivotal axises on the cart provide for an extremely efficient operation. Various enhancements are explained including locking of the orientation of the cart following the initial dump, wheel blocking to prevent rotation of the ground support wheel relative to the bucket during at least a portion of the final dumping action and stabilization enhancement to prevent lateral tipping of the cart during the final dumping action.
    Type: Grant
    Filed: January 22, 2003
    Date of Patent: May 3, 2005
    Assignee: Zimmco
    Inventor: Felton Zimmerman
  • Patent number: D588323
    Type: Grant
    Filed: February 20, 2007
    Date of Patent: March 10, 2009
    Assignee: Zimmco, Inc.
    Inventor: Felton Zimmerman
  • Patent number: D591022
    Type: Grant
    Filed: February 20, 2007
    Date of Patent: April 21, 2009
    Assignee: Zimmco, Inc.
    Inventor: Felton Zimmerman
  • Patent number: D591023
    Type: Grant
    Filed: February 20, 2007
    Date of Patent: April 21, 2009
    Assignee: Zimmco, Inc.
    Inventor: Felton Zimmerman