Patents by Inventor John T. Shackelford

John T. Shackelford 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: 5299599
    Abstract: A valving arrangement primarily designed and intended for use in a negative pressure ventilator system. The valve arrangement has a uniquely designed valve that enables the ventilator to perform a number of operations simply by manipulation of a single, one-piece valve member within a valve housing. The valve housing has multiple inlets and outlets and the valve member can be rotated within it to present a variety of pressure cycles to the patient. In the preferred manner of operation, the present invention selectively applies negative and positive pressures to the patient during different portions of the cycle. In this regard, the valve member is structured so that negative and positive pressures are never at the same time delivered to the patient. The valve arrangement is compact and lightweight. It is also functionally superior to prior designs that can only supply whatever pressure is being created by the blower.
    Type: Grant
    Filed: September 17, 1992
    Date of Patent: April 5, 1994
    Assignee: Lifecare International, Inc.
    Inventors: Robert B. Farmer, John T. Shackelford
  • Patent number: 4474341
    Abstract: This invention comprehends a spinning style fishing reel having a housing with a drag assembly that is actuated by a clutchwheel mounted on a shaft for rotating a gear carried by the shaft. The gear meshes with and rotates a second gear which has an axially facing cam surface engaging with a matching cam surface carried by a member that does not rotate relative to the housing. Turning the clutchwheel rotates the cam surfaces relative to each other to increase or decrease the drag force applied uniformly on the spool.
    Type: Grant
    Filed: November 18, 1982
    Date of Patent: October 2, 1984
    Assignee: Brunswick Corporation
    Inventors: John T. Shackelford, Robert L. Carpenter
  • Patent number: 4408729
    Abstract: This invention comprehends a spinning style fishing reel having a drag assembly that is actuated by a star drag wheel mounted on a common axis with a crank lever. A slide drag actuator of the drag assembly engages with a drag plate and is moved by the star drag wheel to increase or decrease the pressure applied by the drag plate on the line spool.
    Type: Grant
    Filed: October 18, 1982
    Date of Patent: October 11, 1983
    Assignee: Brunswick Corporation
    Inventors: Elvis W. Moss, John T. Shackelford
  • Patent number: 4378914
    Abstract: This invention comprehends a spinning style fishing reel having a housing with a drag assembly that is actuated by a clutchwheel mounted on a shaft for rotating a gear carried by the shaft. The gear meshes with and rotates a second gear which has an axially facing cam surface engaging with a matching cam surface carried by a member that does not rotate relative to the housing. Turning the thumbwheel rotates the cam surfaces relative to each other to increase or decrease the drag force applied uniformly on the spool.
    Type: Grant
    Filed: July 31, 1981
    Date of Patent: April 5, 1983
    Assignee: Brunswick Corporation
    Inventors: John T. Shackelford, Robert L. Carpenter
  • Patent number: 4209825
    Abstract: A lamp having a treated lense for reducing peripheral glare thereby making the lamp useful as a driving light, fog light or spotlight. The treated lense is provided with opaque pigment around the periphery of the lense and the center portion thereof to form elliptical shaped aperture for more acutely defining the desired beam pattern.
    Type: Grant
    Filed: December 27, 1977
    Date of Patent: June 24, 1980
    Assignee: Optronics, Inc.
    Inventor: John T. Shackelford
  • Patent number: D282403
    Type: Grant
    Filed: August 4, 1983
    Date of Patent: January 28, 1986
    Assignee: Aspen Laboratories, Inc.
    Inventor: John T. Shackelford