Patents by Inventor James A. Olthoff

James A. Olthoff 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: 6374606
    Abstract: A material eject system includes an ejector mounted to a bed of a vehicle which is movable between a rear end and a forward end of the bed for ejecting material from the bed. The ejector is powered by a cylinder having different fluid volumes depending on the direction of motion of the cylinder. Two pumps having flow rates matching the different fluid volumes of the cylinder are used to power the cylinder in the different directions.
    Type: Grant
    Filed: March 19, 1999
    Date of Patent: April 23, 2002
    Assignee: Caterpillar S.A.R.L.
    Inventors: Jeff Fallon, Philip F. Lange, James A. Olthoff, David A. Young
  • Patent number: 4286674
    Abstract: PCT No. PCT/US79/00763 Sec. 371 Date Sept. 24, 1979 Sec. 102(e) Date Sept. 24, 1979 PCT Filed Sept. 24, 1979 PCT Pub. No. W081/00897 PCT Pub. Date Apr. 2, 1981The push arms of a conventional bulldozer assembly are mounted on a track roller frame of a track-type tractor by bearing assemblies, each including a pair of bearing caps. One of the bearing caps is welded to the push arm, thus requiring that it be cut-off upon replacement thereof. In addition, the bearing cap welded to the push arm must be selectively hardened to avoid stress cracking in the heat affected zone of the weld. This invention overcomes the above problems by providing a bearing assembly (16) which includes a pair of separable first and second bearing caps (17, 17') which are secured together and to the push arm by common fasteners (28).
    Type: Grant
    Filed: September 24, 1979
    Date of Patent: September 1, 1981
    Assignee: Caterpillar Tractor Co.
    Inventors: Charles M. Noble, James A. Olthoff
  • Patent number: 4221267
    Abstract: An implement assembly (12) includes an implement (16), such as, for example, a blade (22) of a work vehicle (10), pivotally connected to a frame (14) for supporting said blade (22). The blade (22) and frame (14) are closely positioned to the front of the work vehicle (10) for maximum stability and balance of the vehicle (10). In the implement assembly (12) first apparatus (18) tilts the blade (22) generally vertically. Second apparatus (20), such as, for example, angling cylinders (40,42), moves the blade (22) to preselected angles relative to the vehicle (10). A subframe (50) is pivotally connected to the frame (14) and second apparatus (20). The blade (22) moves along the subframe (50) during tilting and with the subframe (50) to the preselected angles.
    Type: Grant
    Filed: January 29, 1979
    Date of Patent: September 9, 1980
    Assignee: Caterpillar Tractor Co.
    Inventors: Jerrold R. Asal, James A. Olthoff
  • Patent number: 4217963
    Abstract: An angled bulldozer blade for an earthmoving machine is operatively connected to a slider assembly slidably carried on a rail fastened to each side arm of a C-frame. Removable pins engage with each slider assembly and pass into aligned apertures of a plurality of prelocated apertures in the rail to position the slider assembly for setting the blade in a desired angled position. Self-locking latches are provided for retaining the pins in position. Eight apertures in each side rail are located so as to provide five positions for the slider assembly.
    Type: Grant
    Filed: December 12, 1977
    Date of Patent: August 19, 1980
    Assignee: Caterpillar Tractor Co.
    Inventors: Gary P. Freese, James A. Olthoff
  • Patent number: 4055223
    Abstract: A corner tooth assembly, for an earthmoving implement having an upright sidewall and a cutting edge disposed in laterally extending relation from the sidewall, includes a corner tooth adapter having a hollow rearward portion secured to a lower forward outside surface of the sidewall and a nose portion extending forwardly of the sidewall, and a replaceable wear tip mounted on the nose portion of the adapter protectingly beyond the implement so that loads on the tip during forward movement of the implement are transmitted through the adapter directly rearwardly to the sidewall without affecting the cutting edge.
    Type: Grant
    Filed: October 4, 1976
    Date of Patent: October 25, 1977
    Assignee: Caterpillar Tractor Co.
    Inventors: Thomas P. Casey, Howard A. Hansen, Gene R. Klett, James A. Olthoff
  • Patent number: RE31642
    Abstract: An implement assembly (12) includes an implement (16), such as, for example, a blade (22) of a work vehicle (10), pivotally connected to a frame (14) for supporting said blade (22). The blade (22) and frame (14) are closely positioned to the front of the work vehicle (10) for maximum stability and balance of the vehicle (10). In the implement assembly (12) first apparatus (18) tilts the blade (22) generally vertically. Second apparatus (20), such as, for example, angling cylinders (40,42), moves the blade (22) to preselected angles relative to the vehicle (10). A subframe (50) is pivotally connected to the frame (14) and second apparatus (20). The blade (22) moves along the subframe (50) during tilting and with the subframe (50) to the preselected angles.
    Type: Grant
    Filed: June 11, 1981
    Date of Patent: August 7, 1984
    Assignee: Caterpillar Tractor Co.
    Inventors: Jerrold R. Asal, James A. Olthoff