Patents by Inventor James D. Sturgill

James D. Sturgill 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).

  • Publication number: 20020017308
    Abstract: The present invention relates to a method for transferring harvested tobacco leaves from an amorphous mass of harvested tobacco leaves to a bulk curing container component for subsequent transfer to a bulk curing site. According to the method, the bulk curing container component is positioned adjacent a tobacco discharging end of a tobacco transferring system. The transferring system has the discharging end, a tobacco receiving end opposite the discharging end, and a generally upwardly facing tobacco conveying apparatus for supporting and moving the leaves between the discharging and receiving ends. The amorphous mass of harvested tobacco leaves is supplied to the tobacco conveying apparatus at the tobacco receiving end of the transferring system in such a manner that the harvested tobacco leaves of the amorphous mass are randomly arranged and stacked on top of one another in a generally vertical direction.
    Type: Application
    Filed: October 16, 2001
    Publication date: February 14, 2002
    Applicant: Powell Manufacturing Company
    Inventors: James D. Sturgill, Donald J. Stewart
  • Patent number: 6321758
    Abstract: The present invention relates to a method for transferring harvested tobacco leaves from an amorphous mass of harvested tobacco leaves to a bulk curing container component for subsequent transfer to a bulk curing site. According to the method, the bulk curing container component is positioned adjacent a tobacco discharging end of a tobacco transferring system. The transferring system has the discharging end, a tobacco receiving end opposite the discharging end, and a generally upwardly facing tobacco conveying apparatus for supporting and moving the leaves between the discharging and receiving ends. The amorphous mass of harvested tobacco leaves is supplied to the tobacco conveying apparatus at the tobacco receiving end of the transferring system in such a manner that the harvested tobacco leaves of the amorphous mass are randomly arranged and stacked on top of one another in a generally vertical direction.
    Type: Grant
    Filed: June 4, 1999
    Date of Patent: November 27, 2001
    Assignee: Powell Manufacturing Company
    Inventors: James D. Sturgill, Donald J. Stewart
  • Patent number: 4876845
    Abstract: A self-propelled powered mower (11) and a towed trailing mower (12) are connected together by an adjustable height connector assembly (13). When the powered mower begins to move through a turn, the alignment detector cylinder (60) is required to retract due to the pivoting of the draw bar (21) and its angled support arm about the vertical pivot pin (50) of the connector assembly (13) (FIG. 3). The fluid displaced from alignment detector cylinder (60) causes the rod (56) to extend from height adjustment cylinder (55), thereby raising the forward portion of the towed mower.
    Type: Grant
    Filed: April 12, 1989
    Date of Patent: October 31, 1989
    Assignee: Robert M. Torras
    Inventor: James D. Sturgill
  • Patent number: 4521044
    Abstract: A twistlock operator for a twistlock mechanism has a drive mechanism with a fixed axis and an angularly displaceable twistlock having a pivot axis normally positioned along the fixed axis. A first actuator is drivingly connected to the drive mechanism for thereby permitting rotation of the first actuator and a second actuator is connected to the twistlock. Each of the actuators is generally rectangularly shaped and each has arcuate side bearing surfaces and the bearing surfaces have substantially equal radii of curvature. A tube is pivotally connected to each of the actuators for drivingly connecting the actuators and thereby causing cooperative rotation of the actuators. The tube maintains driving connection between the actuators even when the twistlock pivots and thereby displaces the pivot axis away from the fixed axis.
    Type: Grant
    Filed: March 21, 1983
    Date of Patent: June 4, 1985
    Assignee: RPC Corporation
    Inventors: William S. Appleman, James D. Sturgill
  • Patent number: 4378072
    Abstract: A gantry crane comprising a pair of spaced, parallel rectangular side frames each having top and bottom members and front and rear vertical members connected to the top and bottom members, a front cross beam rigidly connected to each of the side frames at the upper front corners thereof, and a rear cross beam pivotally connected to each of the side frames at the upper rear corners thereof, each of the side frames further including diagonal braces, ground engaging drive wheels mounted on the side frames at the lower corners thereof so that as the gantry crane traverses uneven ground, the wheels maintain ground contact as the rear cross beam pivots with respect to the side frames and the front cross beam absorbs the torsional stress.
    Type: Grant
    Filed: June 16, 1980
    Date of Patent: March 29, 1983
    Assignee: RPC Corporation
    Inventors: William S. Appleman, James D. Sturgill
  • Patent number: 4263979
    Abstract: An electro-hydraulic steering system is disclosed for a wide track steerable vehicle which changes the position of each steerable slave wheel to an optimum angle depending on the angle of a hydraulically steerable master wheel. Controls, including electro-hydraulic steering mechanisms, are provided to cause the steerable slave wheels to turn relative to one another to assume and maintain an optimum turning radius and optimum turning relationship as the vehicle operator maneuvers the vehicle along a desired curved path of travel by hydraulically controlling a master steerable wheel. The system minimizes tire wear, reduces structural stresses in the vehicle, and maximizes traction during turning maneuvers. No conventional tie rods are required and the system may be implemented to permit two wheel steering, four wheel crab steering, and four or more wheel coordinated steering.
    Type: Grant
    Filed: November 9, 1978
    Date of Patent: April 28, 1981
    Assignee: RPC Corporation
    Inventor: James D. Sturgill
  • Patent number: 4219094
    Abstract: A straddle crane including four vertical column members, two side beam or torsion members, and at least one header beam member, and having wheel or caster assemblies supporting each vertical column member. The straddle crane is implemented for two-wheel or four-wheel steering and for two-wheel or four-wheel driving with open or closed ends. The structures of the header beam and the side beam members are appropriately selected, and the attachment means therefor to the vertical column members are chosen to accommodate the various forces and stresses occurring on the structure during normal operation over uneven terrain or surfaces. The header beam member is sufficiently flexible to permit movement of the casters over and in contact with uneven terrain without producing unacceptable shear stresses in the header beam member. The torsion beam member defines a closed geometric figure in cross section to provide torsional and bending resistance to the loads applied to the vertical columns.
    Type: Grant
    Filed: November 9, 1978
    Date of Patent: August 26, 1980
    Assignee: RPC Corporation
    Inventor: James D. Sturgill