Patents by Inventor Paul D. Hagen

Paul D. Hagen 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: 7736117
    Abstract: A linkage assembly that includes a pivot pin cartridge disposed to connect pivotably a lift arm and a lever of the linkage assembly along an axis including the cartridge. The pivot pin cartridge includes a pin, at least one bushing pivotably disposed about at least a portion of the pin, and a pair of sleeve bearing inserts free-floatingly positioned about the pin and within at least a portion of the bushing. The rear tilt lever is coupled to the bushing for rotation about the pin, while at least one of a pair of side plates of the lift arm is coupled to the pivot pin.
    Type: Grant
    Filed: October 31, 2007
    Date of Patent: June 15, 2010
    Assignee: Caterpillar Inc.
    Inventors: Wayne Harshberger, Darren M. Schambach, Jason J. Hagedorn, Paul D. Hagen
  • Publication number: 20090110530
    Abstract: A linkage assembly that includes a pivot pin cartridge disposed to connect pivotably a lift arm and a lever of the linkage assembly along an axis including the cartridge. The pivot pin cartridge includes a pin, at least one bustling pivotably disposed about at least a portion of the pin, and a pair of sleeve bearing inserts free-floatingly positioned about the pin and within at least a portion of the bushing. The rear tilt lever is coupled to the bushing for rotation about the pin, while at least one of a pair of side plates of the lift arm is coupled to the pivot pin.
    Type: Application
    Filed: October 31, 2007
    Publication date: April 30, 2009
    Applicant: CATERPILLAR INC.
    Inventors: Wayne Harshberger, Darren M Schambach, Jason J Hagedorn, Paul D. Hagen
  • Patent number: 7441405
    Abstract: A cylinder assembly is disclosed. The cylinder assembly may include a cylinder body having an internal cavity therein and a piston and rod assembly disposed for axial movement within the internal cavity of the cylinder body. The piston and rod assembly may have an axial passage extending therein. The cylinder assembly may further include a tubular element received within the axial passage of the piston and rod assembly. At least a portion of the tubular element may extend out of the axial passage and into the internal cavity of the cylinder body between the axial passage and a wall of the cylinder body.
    Type: Grant
    Filed: March 31, 2006
    Date of Patent: October 28, 2008
    Assignee: Caterpillar Inc.
    Inventors: Robert A. Aarestad, Paul D. Hagen, John J. Krone, Jason L. Brinkman, George M. Romack
  • Publication number: 20070227133
    Abstract: A cylinder assembly is disclosed. The cylinder assembly may include a cylinder body having an internal cavity therein and a piston and rod assembly disposed for axial movement within the internal cavity of the cylinder body. The piston and rod assembly may have an axial passage extending therein. The cylinder assembly may further include a tubular element received within the axial passage of the piston and rod assembly. At least a portion of the tubular element may extend out of the axial passage and into the internal cavity of the cylinder body between the axial passage and a wall of the cylinder body.
    Type: Application
    Filed: March 31, 2006
    Publication date: October 4, 2007
    Applicant: Caterpillar Inc.
    Inventors: Robert A. Aarestad, Paul D. Hagen, John J. Krone, Jason L. Brinkman, George M. Romack
  • Patent number: 6056069
    Abstract: A latch for a link assembly is disclosed. The link assembly has (i) an internally threaded sleeve and (ii) an externally threaded rod positioned within the internally threaded sleeve so that the externally threaded rod is meshingly engaged with the internally threaded sleeve. The latch includes a handle portion operable between a lock mode and an unlock mode, wherein when the handle portion is (i) in the lock mode relative rotation between the internally threaded sleeve and the externally threaded rod is prevented and (ii) in the unlock mode relative rotation between the internally threaded sleeve and the externally threaded rod is allowed. The latch also includes an engagement portion secured to the handle portion.
    Type: Grant
    Filed: June 18, 1999
    Date of Patent: May 2, 2000
    Assignee: Caterpillar Inc.
    Inventors: Paul D. Hagen, Kenneth W. Huck, Vern I. Woodruff, Kevin R. Paarlberg
  • Patent number: 4096957
    Abstract: A pivot pin assembly for mounting a loader bucket to a loader arm of a tractor. The pivot pin assembly includes a cylindrical pin having spaced-apart retaining sleeves which capture a sleeve bearing therebetween. The retaining sleeves engage the bucket bracket assembly and the bearing engages the loader arm assembly. Flanges on one retaining sleeve engage the bucket bracket assembly to restrict axial movement of the pin in one direction. A cover plate, secured to the bucket bracket over the flanges, restricts axial movement of the pin in the other direction. The flanges define two spaced-apart sides which are retained in a channel on the cover plate to prevent rotational movement of the pin with respect to the loader bucket. The pivot pin assembly may be removed by detaching the cover plate and pulling the pin from the bucket bracket assembly and the loader arm assembly.
    Type: Grant
    Filed: July 18, 1977
    Date of Patent: June 27, 1978
    Assignee: Caterpillar Tractor Co.
    Inventors: Lowell P. Iverson, George W. Dirscherl, Paul D. Hagen