Patents by Inventor Melvin R. Sindt

Melvin R. Sindt 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).

  • Method of securing two non-metal surfaces together using a hot melt type fastener heatable by induction heating
    Patent number: 4120712
    Abstract: A fastening device having a sheet of eddy current conducting material sandwiched between two sheets of heat-activatable plastic material, the sheet of eddy current conducting material having a matrix of apertures, the sheets of heat-activatable plastic material covering the matrix area, and the device including means on an outer surface for releasably holding the device against a non-metallic surface prior to heat activation of the sheets of plastic material by an induction heater apparatus and system.
    Type: Grant
    Filed: December 11, 1975
    Date of Patent: October 17, 1978
    Assignee: The Boeing Company
    Inventor: Melvin R. Sindt
  • Fastening device for use with induction heater apparatus and system for holding together two nonmetal surfaces
    Patent number: 3996402
    Abstract: A fastening device having a sheet of eddy current conducting material sandwiched between two sheets of heat-activatable plastic material, the sheet of eddy current conducting material having a matrix of apertures, the sheets of heat-activatable plastic material covering the matrix area, and the device including means on an outer surface for releasably holding the device against a non-metallic surface prior to heat activation of the sheets of plastic material by an induction heater apparatus and system.
    Type: Grant
    Filed: March 17, 1975
    Date of Patent: December 7, 1976
    Assignee: The Boeing Company
    Inventor: Melvin R. Sindt
  • Induction heater apparatus and system
    Patent number: 3953700
    Abstract: A system for utilizing electrical energy to induce eddy currents in an electrically conductive article, e.g., the metallic member of a hot melt type fastener. An ultrasonic frequency generator circuit utilizing a single SCR and having a maximum power output of about 1 kilowatt includes in circuit therewith a coupling coil for providing directly a high concentrated magnetic field which induces eddy currents in the electrically conductive article for rapid heating.
    Type: Grant
    Filed: March 4, 1974
    Date of Patent: April 27, 1976
    Assignee: The Boeing Company
    Inventor: Melvin R. Sindt