Patents by Inventor John Charles Drenter

John Charles Drenter 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: 11901153
    Abstract: An x-ray apparatus includes a vacuum chamber that includes a window for exit of x-rays. Electrons are generated at a cathode within the vacuum chamber and accelerated toward a target anode associated with the window. An x-ray generating layer is included as a surface of the target anode to receive the electrons emitted by the cathode and to create x-rays. A blocking path blocks over 70% of the free electrons reaching said target anode from continuing on to exit through the window, while allowing x-rays leaving the x-ray generating layer to continue along the selectively blocking path to exit through the window. The x-ray apparatus is capable of operating at low voltage and relatively high power to reduce the necessary shielding and the corresponding weight of the apparatus yet allow more ready absorption of x-rays by items being irradiated.
    Type: Grant
    Filed: March 5, 2021
    Date of Patent: February 13, 2024
    Assignee: PCT Ebeam and Integration, LLC
    Inventors: Karl E. Swanson, John Charles Drenter, Paul Michael Fletcher
  • Publication number: 20220285120
    Abstract: An x-ray apparatus includes a vacuum chamber that includes a window for exit of x-rays. Electrons are generated at a cathode within the vacuum chamber and accelerated toward a target anode associated with the window. An x-ray generating layer is included as a surface of the target anode to receive the electrons emitted by the cathode and to create x-rays. A blocking path blocks over 70% of the free electrons reaching said target anode from continuing on to exit through the window, while allowing x-rays leaving the x-ray generating layer to continue along the selectively blocking path to exit through the window. The x-ray apparatus is capable of operating at low voltage and relatively high power to reduce the necessary shielding and the corresponding weight of the apparatus yet allow more ready absorption of x-rays by items being irradiated.
    Type: Application
    Filed: March 5, 2021
    Publication date: September 8, 2022
    Applicant: PCT Ebeam and Integration, LLC
    Inventors: Karl E. Swanson, John Charles Drenter, Paul Michael Fletcher
  • Publication number: 20160093410
    Abstract: Apparatus for electron beam treatment of three-dimensional parts that includes cavities in a shielded rotating drum that preferably includes additional rotation mechanism for rotating parts within cavities in said drum. Radiation associated with the electron beam emitter is substantially shielded by the combination of the drum and the additional radiation shielding. The rotating drum is preferably made of at least four sections axially stacked, and its shielding properties are enhanced by including lead filled holes drilled in the sections.
    Type: Application
    Filed: September 30, 2014
    Publication date: March 31, 2016
    Inventors: Rily Carl Grunwald, John Charles Drenter
  • Patent number: 9299465
    Abstract: Apparatus for electron beam treatment of three-dimensional parts that includes cavities in a shielded rotating drum that preferably includes additional rotation mechanism for rotating parts within cavities in said drum. Radiation associated with the electron beam emitter is substantially shielded by the combination of the drum and the additional radiation shielding. The rotating drum is preferably made of at least four sections axially stacked, and its shielding properties are enhanced by including lead filled holes drilled in the sections.
    Type: Grant
    Filed: September 30, 2014
    Date of Patent: March 29, 2016
    Assignee: PCT Engineered Systems, LLC
    Inventors: Rily Carl Grunwald, John Charles Drenter
  • Patent number: 5657876
    Abstract: A mobile apparatus and process for the separation and recovery of abrasive grit material from blasting material containing waste material and contaminants. The mobile apparatus has a low profile which facilitates the movement of the apparatus to job sites. At the job site the blasting material is collected by the mobile apparatus through a flexible hose connected to a chamber which is under sub atmospheric pressure. A vacuum generator that reduces the pressure in the chamber has sufficient power to allow vacuum collection of the blasting material through the flexible hose when material flow might otherwise clog the hose. The abrasive grit material is removed from the blasting material by self-contained, multi-step separation process situated within the chamber. The mobile apparatus utilizes an initial physical separator, a rotary screen separator, a magnetic separator, and an air wash separation device that are interconnected by a rotary lift wheel.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: August 19, 1997
    Assignee: PCT, Inc.
    Inventors: John Charles Drenter, Donald Charles Allebach, Jr., Dieter Artur Konitzer, Jr.