Patents by Inventor Derek W. Bowman

Derek W. Bowman 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: 4780932
    Abstract: Electrical stunning apparatus for beef cattle or other livestock uses head restraining means to hold the animal's head in place during contact by electrodes. The animal's head is prevented from moving upwardly by a pusher which contacts the top of its head or neck, while a chin lifter moves in from below the animal's head to hold it in place. An electrode on the chin lifter contacts the animal's nose allowing a stunning current to pass through the animal's head to another electrode on the pusher (for head stunning). If deep stunning is required an additional electrode may be moved into contact with the rear of the animal to apply a heart-stopping current.
    Type: Grant
    Filed: December 29, 1987
    Date of Patent: November 1, 1988
    Assignee: T. H. Walker & Sons Limited
    Inventors: Derek W. Bowman, John C. Richardson
  • Patent number: 4748719
    Abstract: Electrical stunning apparatus for beef cattle or other livestock uses head restraining means to hold the animal's head in place during contact by electrodes. The animal's head is prevented from moving upwardly by a pusher which contacts the top of its head or neck, while a chin lifter moves in from below the animal's head to hold it in place. An electrode on the chin lifter contacts the animal's nose allowing a stunning current to pass through the animal's head to another electrode on the pusher (for head stunning). If deep stunning is required an additional electrode may be moved into contact with the rear of the animal to apply a heart-stopping current.
    Type: Grant
    Filed: November 24, 1986
    Date of Patent: June 7, 1988
    Assignee: T.H. Walker & Sons Limited
    Inventors: Derek W. Bowman, John C. Richardson