Patents by Inventor Robert Doyle Roley

Robert Doyle Roley 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).

  • Hitch assembly and tractor scraper using same
    Patent number: 7937858
    Abstract: A hitch assembly includes a hitch assembly frame. A tow bar includes a shaft having a first end pivotably attached to the hitch assembly frame and a coupling member attached to a second end of the shaft. A push plate is pivotably attached to the hitch assembly frame and defines a vertically aligned slot. The tow bar is movable within the vertically aligned slot. Such a hitch assembly may be used to operate machines, such as tractor scrapers, in a push-pull configuration.
    Type: Grant
    Filed: November 21, 2008
    Date of Patent: May 10, 2011
    Assignee: Caterpillar Inc.
    Inventor: Robert Doyle Roley
  • Method for adjusting a wheel axis of rotation of a scraper and actuation mechanism therefor
    Patent number: 7900740
    Abstract: A machine includes an axle assembly coupled with a frame and defining a central axis. The axle assembly includes a wheel axle disposed within a spindle housing, and a rotary actuator configured to rotate the wheel axle about the central axis by rotating the spindle housing. According to one embodiment, for example, the rotary actuator may be configured to adjust a wheel axis of rotation relative to the frame of a machine, such as a scraper, by rotating the spindle housing.
    Type: Grant
    Filed: October 31, 2008
    Date of Patent: March 8, 2011
    Assignee: Caterpillar Inc.
    Inventor: Robert Doyle Roley
  • Hitch assembly and tractor scraper using same
    Publication number: 20100126048
    Abstract: A hitch assembly includes a hitch assembly frame. A tow bar includes a shaft having a first end pivotably attached to the hitch assembly frame and a coupling member attached to a second end of the shaft. A push plate is pivotably attached to the hitch assembly frame and defines a vertically aligned slot. The tow bar is movable within the vertically aligned slot. Such a hitch assembly may be used to operate machines, such as tractor scrapers, in a push-pull configuration.
    Type: Application
    Filed: November 21, 2008
    Publication date: May 27, 2010
    Inventor: Robert Doyle Roley
  • Hydraulic actuator assembly and scraper using same
    Publication number: 20100122477
    Abstract: An apron assembly includes an apron having an apron body extending between a first apron side and a second apron side. A portion of the apron includes an arcuate gear surface. A hydraulic actuator assembly includes a linear hydraulic actuator configured to actuate a drive gear, which is in mesh with the arcuate gear surface. According to an exemplary embodiment, the hydraulic actuator assembly is configured to translate linear motion into rotary motion.
    Type: Application
    Filed: November 14, 2008
    Publication date: May 20, 2010
    Inventor: Robert Doyle Roley
  • Method for adjusting a wheel axis of rotation of a scraper and actuation mechanism therefor
    Publication number: 20100107454
    Abstract: A machine includes an axle assembly coupled with a frame and defining a central axis. The axle assembly includes a wheel axle disposed within a spindle housing, and a rotary actuator configured to rotate the wheel axle about the central axis by rotating the spindle housing. According to one embodiment, for example, the rotary actuator may be configured to adjust a wheel axis of rotation relative to the frame of a machine, such as a scraper, by rotating the spindle housing.
    Type: Application
    Filed: October 31, 2008
    Publication date: May 6, 2010
    Inventor: Robert Doyle Roley