Patents by Inventor Darby R. Robertson

Darby R. Robertson 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: 6739680
    Abstract: A cartridge assembly for a track chain assembly is provided. The cartridge assembly includes a bushing rotatably positioned about a track pin. Bearing members are positioned about the track pin adjacent the bushing. Collars are positioned about the track pin adjacent the bearing members. Seal arrangements are positioned between the collars and the bearing members and between the bearing members and the track bushing sealably excluding contaminants and the retention of a lubricating fluid from a passage in the bushing and a bore within the track pin.
    Type: Grant
    Filed: August 21, 2002
    Date of Patent: May 25, 2004
    Assignee: Caterpillar Inc
    Inventors: Michael D. Hasselbusch, Roy L. Maguire, Darby R. Robertson
  • Publication number: 20040036353
    Abstract: A cartridge assembly for a track chain assembly is provided. The cartridge assembly includes a bushing rotatably positioned about a track pin. Bearing members are positioned about the track pin adjacent the bushing. Collars are positioned about the track pin adjacent the bearing members. Seal arrangements are positioned between the collars and the bearing members and between the bearing members and the track bushing sealably excluding contaminants and the retention of a lubricating fluid from a passage in the bushing and a bore within the track pin.
    Type: Application
    Filed: August 21, 2002
    Publication date: February 26, 2004
    Inventors: Michael D. Hasselbusch, Roy L. Maguire, Darby R. Robertson
  • Patent number: 6435628
    Abstract: A guiding arrangement has a guide structure having an opening defined therein. The guiding arrangement also has a roller assembly. The guiding arrangement further has an axle positioned relative to the guide structure so that a portion of the axle is located within the opening.
    Type: Grant
    Filed: August 24, 2000
    Date of Patent: August 20, 2002
    Assignee: Caterpillar Inc.
    Inventors: Michael D. Hasselbusch, Roy L. Maguire, Darby R. Robertson
  • Patent number: 6382742
    Abstract: A cartridge assembly for a track chain assembly includes a bushing having a passageway defined therethrough. The cartridge assembly also includes track pin having a longitudinal axis. The track pin is located within the passageway so that a first end portion and a second end portion of the track pin extends outwardly from the passageway of the bushing. The cartridge assembly further includes a first insert having a first bore defined therethrough. The first insert is positioned relative to the track pin such that the first end portion of the track pin is disposed within the first bore. The cartridge assembly also includes a first collar having a first hole defined therein.
    Type: Grant
    Filed: April 20, 2000
    Date of Patent: May 7, 2002
    Assignee: Caterpillar Inc.
    Inventors: Michael D. Hasselbusch, Roy L. Maguire, Thomas E. Oertley, Darby R. Robertson
  • Patent number: 6371577
    Abstract: A track chain assembly includes a bushing having a passageway defined therethrough. The track chain assembly also includes a track pin having a longitudinal axis. The track pin is disposed within the passageway of the bushing. The track chain assembly further includes a first insert having a first bore defined therethrough. The first insert is positioned relative to the track pin such that the track pin is disposed within the first bore. The track pin assembly further includes a first inner link having a first aperture defined therein. The first inner link is positioned relative to the first insert such that the first insert is (i) located within the first aperture and (ii) interposed between the first inner link and the track pin. The track pin assembly also includes a first outer link having a second aperture defined therein.
    Type: Grant
    Filed: April 20, 2000
    Date of Patent: April 16, 2002
    Assignee: Caterpillar Inc.
    Inventors: Michael D. Hasselbusch, Roy L. Maguire, Darby R. Robertson
  • Patent number: 6354679
    Abstract: A link includes a body member having (i) a first side, (ii) a second side, (iii) a first aperture defined therethrough, and (iv) a second aperture defined therethrough. The body member has a rail surface and a shoe surface. A central axis passes through the rail surface and the shoe surface so as to define a substantially 90° angle between (i) the rail surface and the central axis and (ii) the shoe surface and the central axis. The body member is symmetrical about the central axis. The first aperture is off-set from the second aperture so that the first aperture is not coplanar with the second aperture.
    Type: Grant
    Filed: April 20, 2000
    Date of Patent: March 12, 2002
    Assignee: Caterpillar Inc.
    Inventors: Roy L. Maguire, Darby R. Robertson
  • Patent number: 6322173
    Abstract: A link for a track chain assembly of a track type work machine includes a body member having (i) a first side, (ii) a second side, (iii) a first aperture defined therethrough, and (iv) a second aperture defined therethrough. The link also includes a first extension member extending outwardly from the first side of the body member. The first extension member has a point P1 defined thereon. The link also includes a second extension member extending outwardly from the first side of the body member. The second extension member has a point P2 defined thereon. The link also includes a third extension member extending outwardly from the first side of the body member. The third extension member has a point P3 defined thereon. The first extension member, the second extension member, and the third extension member are spaced apart from each other.
    Type: Grant
    Filed: April 20, 2000
    Date of Patent: November 27, 2001
    Assignee: Caterpillar Inc.
    Inventors: Roy L. Maguire, Darby R. Robertson