Patents by Inventor M. Janet Kirkwood

M. Janet Kirkwood 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).

  • Hydraulic pressure relief valve and fluid isolator
    Patent number: 4237935
    Abstract: A body of electrically insulating material contains a passageway extending completely through the body. The passageway includes a flexible diaphragm dividing the passageway into two compartments to isolate a transducer placed on one side of the diaphragm from direct contact with fluid contained on the opposite side. A pressure relief port, passing from one side of the body to the passageway on the fluid side of the diaphragm, is covered with an "O" ring. Excessive fluid pressure forces the "O" ring away from the relief port to vent the pressure and thereby prevent damaging the transducer.
    Type: Grant
    Filed: December 14, 1978
    Date of Patent: December 9, 1980
    Assignee: Eaton Corporation
    Inventors: Julian Delmonte, M. Janet Kirkwood, Douglas G. Ritchie
  • Transducer holder
    Patent number: 4198989
    Abstract: A flexible pad with two self-securing straps for mounting a transducer to the arm of a patient.
    Type: Grant
    Filed: November 17, 1977
    Date of Patent: April 22, 1980
    Assignee: Eaton Corporation
    Inventors: David Hawke, M. Janet Kirkwood
  • Transducer holder
    Patent number: D255938
    Type: Grant
    Filed: December 12, 1977
    Date of Patent: July 15, 1980
    Assignee: Eaton Corporation
    Inventors: David Hawke, M. Janet Kirkwood