Patents by Inventor Danny H. Harrell

Danny H. Harrell 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: 6629565
    Abstract: A well abandonment process for cutting and retrieving an offshore well casing, the process comprising: making a trip to the well wherein all of the following steps are performed, the steps comprising: pulling a seal assembly from the wellhead, cutting the casing, griping the casing, and retrieving the seal assembly and cut casing.
    Type: Grant
    Filed: July 23, 2001
    Date of Patent: October 7, 2003
    Assignee: Smith International, Inc.
    Inventor: Danny H. Harrell
  • Publication number: 20020060076
    Abstract: A well abandonment process for cutting and retrieving an offshore well casing, the process comprising: making a trip to the well wherein all of the following steps are performed, the steps comprising: pulling a seal assembly from the wellhead, cutting the casing, griping the casing, and retrieving the seal assembly and cut casing.
    Type: Application
    Filed: July 23, 2001
    Publication date: May 23, 2002
    Inventor: Danny H. Harrell
  • Patent number: 5400859
    Abstract: A main frame is secured to a tractor for towing wherein the main frame is tilted as the tractor tilts to one side or the other of the path of travel. A ball and socket joint suspends the tool bar by its central portion from the main frame so that the tool bar can swing from a position angling forwardly and to one side to a second position angling forwardly and to the other side. The moldboards being fixed to an suspended below the tool bar cause the tool bar to rotate about its longitudinal axis automatically swing by gravity to upright positions for plowing, regardless of the tilt of the main frame. A latch plate latches the tool bar in its rotated position on the frame. The tool moldboards have clamps which are adjustable along the length of the tool bar for adapting the plow to wide wheel or narrow wheel base tractors.
    Type: Grant
    Filed: June 15, 1993
    Date of Patent: March 28, 1995
    Inventor: Danny H. Harrell
  • Patent number: 5267618
    Abstract: A main frame is secured to a tractor for towing wherein the main frame is tilted as the tractor tilts to one side or the other of the path of travel A ball and socket joint suspends the tool bar by its central portion from the main frame so that the tool bar can swing from a position angling forwardly and to one side to a second position angling forwardly and to the other side The moldboards being fixed to an suspended below the tool bar cause the tool bar to rotate about its longitudinal axis automatically swing by gravity to upright positions for plowing, regardless of the tilt of the main frame. A latch plate latches the tool bar in its rotated position on the frame The tool moldboards have clamps which are adjustable along the length of the tool bar for adapting the plow to wide wheel or narrow wheel base tractors.
    Type: Grant
    Filed: October 10, 1991
    Date of Patent: December 7, 1993
    Inventor: Danny H. Harrell
  • Patent number: 5154239
    Abstract: A reversible plow having a plurality of spring-biased trip assemblies for mounting moldboards to a tool bar, the trip assemblies having angled, elongate slots and a pivot pin extending therethrough and adapted to allow a tripped assembly to be reset without compressing a compression spring.
    Type: Grant
    Filed: June 10, 1991
    Date of Patent: October 13, 1992
    Assignee: Harrell Equipment Company, Inc.
    Inventors: Danny H. Harrell, Levy L. Harrell
  • Patent number: 5078217
    Abstract: A reversible plow comprising a three point hitch, a pivotally mounted tool bar provided with a plurality of adjustable plow gangs, and gauge wheels wherein said tool bar can be shifted from left of center to right of center, and back, by a hydraulic piston such that the plowed ground can be directed in a desired direction.
    Type: Grant
    Filed: November 15, 1990
    Date of Patent: January 7, 1992
    Inventor: Danny H. Harrell
  • Patent number: 5076368
    Abstract: A reversible plow comprising a three point hitch, a pivotally mounted tool bar provided with a plurality of adjustable plow gangs, and gauge wheels wherein said tool bar can be shifted from left of center to right of center, and back, by a hydraulic piston such that the plowed ground can be directed in a desired direction.
    Type: Grant
    Filed: November 15, 1990
    Date of Patent: December 31, 1991
    Inventor: Danny H. Harrell
  • Patent number: 5020603
    Abstract: A reversible plow comprising a three point hitch, a pivotally mounted tool bar provided with a plurality of adjustable plow gangs, and gauge wheels wherein said tool bar can be shifted from left of center to right of center, and back, by a hydraulic piston such that the plowed ground can be directed in a desired direction.
    Type: Grant
    Filed: January 25, 1990
    Date of Patent: June 4, 1991
    Inventor: Danny H. Harrell
  • Patent number: 5000267
    Abstract: A reversible plow comprising a three point hitch, a pivotally mounted tool bar provided with a plurality of adjustable plow gangs, and gauge wheels wherein said tool bar can be shifted from left of center to right of center, and back, by a hydraulic piston such that the plowed ground can be directed in a desired direction. The hitch includes a hydraulic piston and cylinder assembly for shifting the plow frame and tool bar about a central longitudinal axis with respect to the tractor, thereby maintaining the plow in a horizontal position even though one rear wheel of the tractor is in the plowed furrow.
    Type: Grant
    Filed: June 6, 1990
    Date of Patent: March 19, 1991
    Inventor: Danny H. Harrell