Patents by Inventor LeRoy A. Crawford

LeRoy A. Crawford 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: 4563026
    Abstract: A cam member for knotters has a cam section, on which a cam surface is formed, and a flange section. The cam surface is engaged by a cam follower carried on the movable jaw of the knotter billhook. Fasteners such as bolts extend through the flange section of the cam member into the main frame of the knotter to detachably fasten the cam member to the main frame.
    Type: Grant
    Filed: September 10, 1984
    Date of Patent: January 7, 1986
    Assignee: Sperry Corporation
    Inventors: LeRoy A. Crawford, Robert E. Jackson, Earl A. Hudson
  • Patent number: 4463668
    Abstract: A twine needle is provided particularly for use on large crop balers. The twine needle includes a body portion and a tip portion detachably secured to the body portion. The tip portion is designed to break off, if a predetermined force is exerted thereon, without damaging the body portion. A broken tip portion may be easily replaced without replacing the entire twine needle.
    Type: Grant
    Filed: January 14, 1983
    Date of Patent: August 7, 1984
    Assignee: Sperry Corporation
    Inventors: Robert E. Jackson, Leroy A. Crawford, Bryant F. Webb
  • Patent number: 4136510
    Abstract: An improved adjustable feeder finger assembly for a hay baler is disclosed. The improved assembly is comprised generally of three elements, i.e., a bracket for affixment to a driven element of the infeed mechanism, a feeder finger, and means to hold the two together. Frictional mating surfaces on the bracket and finger insure that the selected relative relationship between the two elements is maintained during operation.
    Type: Grant
    Filed: August 19, 1977
    Date of Patent: January 30, 1979
    Assignee: Sperry Rand Corporation
    Inventors: LeRoy A. Crawford, Paul S. Trible
  • Patent number: 4022121
    Abstract: A tying mechanism on a baler having a bale forming chamber incorporates an improvement for removing end play between the components of the tying mechanism. The tying mechanism includes an elongated drive shaft and a plurality of side-by-side units mounted along the shaft and operable to carry out tying of strands of material that band a bale being formed in the bale chamber. The tying units are movable axially along the shaft for adjusting them to predetermined operational positions relative to one another. The improvement relates to a pair of annular adjustment cams being mounted about and releasably secured to the shaft between the units.
    Type: Grant
    Filed: August 18, 1976
    Date of Patent: May 10, 1977
    Assignee: Sperry Rand Corporation
    Inventors: LeRoy A. Crawford, Irwin D. McIlwain