Patents by Inventor John H. F. Bickford

John H. F. Bickford 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).

  • Apparatus and method for determining torque, presenting digital torque readout and automatic cycling and termination of wrench operation in a torque wrench system
    Patent number: 4791838
    Abstract: Apparatus and a method are presented for determining the torque load applied to a fastening element by a fluid powered wrench, and displaying a digital readout of the torque. The operating pressure of the wrench, after compensation for the temperature of the pressure transducer, is converted to a torque measurement by a programmed microprocessor and the torque value is displayed on a digital readout. The system is useable with and adjusts for wrenches of several sizes by an input selector switch connected to the microprocessor. Apparatus and method are also presented for automatic cycling of a ratcheting hydraulic powered wrench and automatic termination of the tightening process when a predetermined torque has been delivered to the fastening element.
    Type: Grant
    Filed: November 12, 1986
    Date of Patent: December 20, 1988
    Assignee: Raymond Engineering Inc.
    Inventors: John H. F. Bickford, Jesse R. Meisterling, Milton O. Smith, Geoffrey F. Kosciak