Patents by Inventor Richard A. Duncan

Richard A. Duncan 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: 4483130
    Abstract: A two row harvester running gear is of a tricycle type with all wheels being hydraulically driven and with a center rear wheel that is steerable and smaller than the two front wheels. The running gear configuration provides sharper turns in muddy fields without bulldozing, and space for side mounting pilers adjacent the front wheels and inboard of them to minimize the number and degree of changes of direction in cut cane travel. Closed loop and parallel connections of an hydraulic power system rotates all wheels for a common linear speed, and at torques relative to the size and positioning thereof for maximum traction.
    Type: Grant
    Filed: October 11, 1983
    Date of Patent: November 20, 1984
    Assignee: Cane Harvest, Inc.
    Inventor: Richard A. Duncan
  • Patent number: 4380281
    Abstract: A two row harvester running gear is of a tricycle type with all wheels being hydraulically driven and with a center rear wheel that is steerable and smaller than the two front wheels. The running gear configuration provides sharper turns in muddy fields without bulldozing, and space for side mounting pilers adjacent the front wheels and inboard of them to minimize the number and degree of changes of direction in cut cane travel. Closed loop and parallel connections of an hydraulic power system rotates all wheels for a common linear speed, and at torques relative to the size and positioning thereof for maximum traction.
    Type: Grant
    Filed: December 12, 1980
    Date of Patent: April 19, 1983
    Assignee: Cane Harvest Inc.
    Inventor: Richard A. Duncan
  • Patent number: 4232775
    Abstract: In a self-propelled, hydraulic four wheel drivetwo row cane harvester having a four-row piler with a main power source driving variable volume pumps for propulsion and operation; structural and operational improvements of a shortened wheel base, outward extension of right rear center carrier, individual suspension of rear wheels for stability on uneven ground, steerable rear wheels differentially linked by means of bell crank linkages, single articulation pilers having multiple row piling capacity, adjustable cane butt deflectors, and a combination range and speed controls with independent adjustments of ranges ground chain speeds and unit control of the cut cane carrier chains of all speeds within the set range.
    Type: Grant
    Filed: September 22, 1978
    Date of Patent: November 11, 1980
    Inventor: Richard A. Duncan
  • Patent number: 4165596
    Abstract: Two pairs of cane gatherers are mounted forwardly on a four-wheeled power train, for driving a plurality of constant and variable volume hydraulic pumps, the cane gatherers being provided with gathering chains for holding and moving cane through a pair of cane passageways defined thereby and by sticker and moving chains mounted for endless rotation for guiding two rows of cane to cane toppers and cutters mounted in each passageway, and then to a pair of articulated pilers mounted on the rear of the power train. Cut-cane passageways through the pilers are defined by cane moving chains and rub bars. The pilers in one articulated position lay the cut cane of one row just behind the cut cane of the second row in a continuous transverse windrow across the cut rows and behind the power train and in a second articulated position lay the cut cane across adjacent cut rows. Front wheels are pivotable up to 90.degree.
    Type: Grant
    Filed: August 25, 1977
    Date of Patent: August 28, 1979
    Inventor: Richard A. Duncan
  • Patent number: 3934391
    Abstract: A harvesting topper comprising an upstanding carrier having an axis and a side surface. The carrier is circular in cross-section transverse to said axis and has at least one deflector attached to its side surface. The deflector has side edges which are substantially circumferentially spaced from each other on the carrier. Means are provided for rotatably mounting the topper on a harvesting machine.
    Type: Grant
    Filed: July 25, 1974
    Date of Patent: January 27, 1976
    Assignee: Thomson International Company
    Inventors: Donald J. Brassette, Richard A. Duncan