Patents by Inventor Keith J. Christopher

Keith J. Christopher 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 and device for mounting shaft seals permitting eccentric motion
    Patent number: 10989302
    Abstract: A device and method are taught for mounting an annular shaft seal between a bore and a shaft in which the shaft and bore may be subject to radial eccentricity. The device comprises an annular sealing case having a first end and a second end; a shaft sealing case having a first end and a second end; a flexible sealing linkage axially and sealingly connecting the second end of the annular sealing case to the first end of the shaft sealing case. The annular sealing case is shaped to receive a seal to seal against an interior surface of the bore, and the shaft sealing case is shaped to receive a seal to seal against an exterior surface of the shaft, and the flexible sealing linkage provides sealing between the annular sealing case and the shaft sealing case.
    Type: Grant
    Filed: June 24, 2019
    Date of Patent: April 27, 2021
    Assignee: Cathedral Energy Services Ltd.
    Inventors: Keith J. Christopher, Bogdan A. Picioreanu
  • Device for isolating a tool from axial vibration while maintaining conductor connectivity
    Patent number: 10683710
    Abstract: A device is provided for isolating, from shock and vibration, any down-hole tool housed within a drill string, while maintaining rotational alignment and providing a continuous electrical connection between the ends of the tool along a plurality of conductor paths. The device increases down-hole tool life while reducing damage when operating in demanding environments.
    Type: Grant
    Filed: May 30, 2017
    Date of Patent: June 16, 2020
    Assignee: CATHEDRAL ENERGY SERVICES LTD.
    Inventors: Keith J. Christopher, Bogdan A. Picioreanu, Kyle Seitz
  • METHOD AND DEVICE FOR MOUNTING SHAFT SEALS PERMITTING ECCENTRIC MOTION
    Publication number: 20190309848
    Abstract: A device and method are taught for mounting an annular shaft seal between a bore and a shaft in which the shaft and bore may be subject to radial eccentricity. The device comprises an annular sealing case having a first end and a second end; a shaft sealing case having a first end and a second end; a flexible sealing linkage axially and sealingly connecting the second end of the annular sealing case to the first end of the shaft sealing case. The annular sealing case is shaped to receive a seal to seal against an interior surface of the bore, and the shaft sealing case is shaped to receive a seal to seal against an exterior surface of the shaft, and the flexible sealing linkage provides sealing between the annular sealing case and the shaft sealing case.
    Type: Application
    Filed: June 24, 2019
    Publication date: October 10, 2019
    Inventors: Keith J. Christopher, Bogdan A. Picioreanu
  • Method and device for mounting shaft seals permitting eccentric motion
    Patent number: 10378650
    Abstract: A device and method are taught for mounting an annular shaft seal between a bore and a shaft in which the shaft and bore may be subject to radial eccentricity. The device comprises an annular sealing case having a first end and a second end; a shaft sealing case having a first end and a second end; a flexible sealing linkage axially and sealingly connecting the second end of the annular sealing case to the first end of the shaft sealing case. The annular sealing case is shaped to receive a seal to seal against an interior surface of the bore, and the shaft sealing case is shaped to receive a seal to seal against an exterior surface of the shaft, and the flexible sealing linkage provides sealing between the annular sealing case and the shaft sealing case.
    Type: Grant
    Filed: July 31, 2017
    Date of Patent: August 13, 2019
    Assignee: CATHEDRAL ENERGY SERVICES LTD.
    Inventors: Keith J. Christopher, Bogdan A. Picioreanu
  • METHOD AND DEVICE FOR MOUNTING SHAFT SEALS PERMITTING ECCENTRIC MOTION
    Publication number: 20190032781
    Abstract: A device and method are taught for mounting an annular shaft seal between a bore and a shaft in which the shaft and bore may be subject to radial eccentricity. The device comprises an annular sealing case having a first end and a second end; a shaft sealing case having a first end and a second end; a flexible sealing linkage axially and sealingly connecting the second end of the annular sealing case to the first end of the shaft sealing case. The annular sealing case is shaped to receive a seal to seal against an interior surface of the bore, and the shaft sealing case is shaped to receive a seal to seal against an exterior surface of the shaft, and the flexible sealing linkage provides sealing between the annular sealing case and the shaft sealing case.
    Type: Application
    Filed: July 31, 2017
    Publication date: January 31, 2019
    Inventors: Keith J. Christopher, Bogdan A. Picioreanu
  • DEVICE FOR ISOLATING A TOOL FROM AXIAL VIBRATION WHILE MAINTAINING CONDUCTOR CONNECTIVITY
    Publication number: 20180100357
    Abstract: A device is provided for isolating, from shock and vibration, any down-hole tool housed within a drill string, while maintaining rotational alignment and providing a continuous electrical connection between the ends of the tool along a plurality of conductor paths. The device increases down-hole tool life while reducing damage when operating in demanding environments.
    Type: Application
    Filed: May 30, 2017
    Publication date: April 12, 2018
    Inventors: Keith J. Christopher, Bogdan A. Picioreanu, Kyle Seitz