Patents by Inventor John G. Liebl

John G. Liebl 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: 12312757
    Abstract: Disclosed embodiments include implements with a linkage and suspension configured to provide downward pressure on tool to allow it to maintain a desired level of contact with a work surface. An adjustable biasing member such as an air bag provides upward pressure on the linkage to reduce downward pressure on the work surface from the tool. Shock absorbers can also be included to hold the linkage in place and limit bouncing of the tool when it is being transported.
    Type: Grant
    Filed: April 20, 2020
    Date of Patent: May 27, 2025
    Assignee: Doosan Bobcat North America, Inc.
    Inventors: John G. Liebl, Kyle R. Lundeen
  • Publication number: 20220195680
    Abstract: Disclosed embodiments include implements with a linkage and suspension configured to provide downward pressure on tool to allow it to maintain a desired level of contact with a work surface. An adjustable biasing member such as an air bag provides upward pressure on the linkage to reduce downward pressure on the work surface from the tool. Shock absorbers can also be included to hold the linkage in place and limit bouncing of the tool when it is being transported.
    Type: Application
    Filed: April 20, 2020
    Publication date: June 23, 2022
    Inventors: John G. Liebl, Kyle R. Lundeen
  • Patent number: 8607890
    Abstract: An implement capable of being attached to a power machine having a mounting portion and a tool portion. The mounting portion is configured to engage with, and be secured to, an implement carrier on the power machine. The tool portion is capable of performing a work function. The implement has a joint for attaching the tool portion to the mounting portion and an actuator having first and second ends with the first end attached to the mounting portion at a first actuator attachment point and second end attached to the tool portion at a second actuator attachment point. The tool portion is capable of rotating about an axis that extends through the joint. The joint is capable of pivoting so that the axis about which the tool portion rotates is rotatable with respect to the tool portion.
    Type: Grant
    Filed: September 18, 2009
    Date of Patent: December 17, 2013
    Assignee: Clark Equipment Company
    Inventors: John G. Liebl, Jesse A. Knudsen
  • Publication number: 20110067893
    Abstract: An implement capable of being attached to a power machine having a mounting portion and a tool portion. The mounting portion is configured to engage with, and be secured to, an implement carrier on the power machine. The tool portion is capable of performing a work function. The implement has a joint for attaching the tool portion to the mounting portion and an actuator having first and second ends with the first end attached to the mounting portion at a first actuator attachment point and second end attached to the tool portion at a second actuator attachment point. The tool portion is capable of rotating about an axis that extends through the joint. The joint is capable of pivoting so that the axis about which the tool portion rotates is rotatable with respect to the tool portion.
    Type: Application
    Filed: September 18, 2009
    Publication date: March 24, 2011
    Applicant: Clark Equipment Company
    Inventors: John G. Liebl, Jesse A. Knudsen
  • Patent number: 7588092
    Abstract: An attachment configured to be attached to a power machine is disclosed. The attachment includes a blade having opposing first and second major surfaces and first and second edges. The attachment has first and second end plates each having opposing inner and outer surfaces. The end plates are fixedly attached to the first and second edges of the blade. The inner surfaces of the first and second end plates are positioned adjacent to and extend from the first major surface of the blade. The attachment further includes a support structure coupled to the blade. The support structure includes a first support member fixedly attached to and extending from both the second major surface of the blade and the outer surface of the first end plate.
    Type: Grant
    Filed: October 4, 2006
    Date of Patent: September 15, 2009
    Assignee: Clark Equipment Company
    Inventor: John G. Liebl
  • Publication number: 20080098627
    Abstract: An attachment configured to be attached to a power machine is disclosed. The attachment includes a blade having opposing first and second major surfaces and first and second edges. The attachment has first and second end plates each having opposing inner and outer surfaces. The end plates are fixedly attached to the first and second edges of the blade. The inner surfaces of the first and second end plates are positioned adjacent to and extend from the first major surface of the blade. The attachment further includes a support structure coupled to the blade. The support structure includes a first support member fixedly attached to and extending from both the second major surface of the blade and the outer surface of the first end plate.
    Type: Application
    Filed: October 4, 2006
    Publication date: May 1, 2008
    Applicant: Clark Equipment Company
    Inventor: John G. Liebl
  • Patent number: 6931771
    Abstract: A snow blower attachment for a skid steer loader has a tall discharge chute used for loading high vehicles such as trucks. The discharge chute is folded in the center, and has a strut to support it in its working position. The strut is releasable for folding the chute, and has a saddle that rests on the snow blower housing so that the folded upper chute section is supported adequately during storage.
    Type: Grant
    Filed: July 2, 2003
    Date of Patent: August 23, 2005
    Assignee: Clark Equipment Company
    Inventor: John G. Liebl