Patents by Inventor Philip H. Sanford

Philip H. Sanford 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).

  • Vibratory feeder
    Patent number: 5375694
    Abstract: A vibratory feeder for cohesive particulate solids such as powders and the like. A conveyor frame supports a flexible conveyor membrane and is excited by a vibrator. The vibrator produces standing waves defined by nodes in the sectional configuration of the membrane transverse to the direction of material flow, with the sections between the nodes effecting periodic, alternately inverting flexures to release adhering solids.
    Type: Grant
    Filed: August 16, 1993
    Date of Patent: December 27, 1994
    Assignee: Hyer Industries, Inc.
    Inventors: Philip H. Sanford, Edward A. Packard
  • Electropneumatic positioner
    Patent number: 5257639
    Abstract: A transducer having an explosion-proof housing with a divider forming two compartments, and the divider having formed therein a well. A magnet and flapper arm arrangement is suspended within the well. A coil winding is fixed in the other compartment around the well so that a magnetic field generated thereby influences the pivotal position of the magnet. Set screws adjustable in the bottom of the well are effective to preset a rest position of the magnet.
    Type: Grant
    Filed: August 24, 1992
    Date of Patent: November 2, 1993
    Assignee: Dresser Industries, Inc.
    Inventors: Robert C. Prescott, Donald C. Simpson, Philip H. Sanford, Howard W. Nudd
  • Electropneumatic positioner
    Patent number: 5159949
    Abstract: A transducer having an explosion-proof housing with a divider forming two compartments, and the divider having formed therein a well. A magnet and flapper arm arrangement is suspended within the well. A coil winding is fixed in the other compartment around the well so that a magnetic field generated thereby influences the pivotal position of the magnet. Set screws adjustable in the bottom of the well are effective to preset a rest position of the magnet.
    Type: Grant
    Filed: June 10, 1991
    Date of Patent: November 3, 1992
    Assignee: Dresser Industries, Inc.
    Inventors: Robert C. Prescott, Donald C. Simpson, Philip H. Sanford, Howard W. Nudd