Patents by Inventor John R. Stone

John R. Stone 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: 5343754
    Abstract: A pressure transducer is shown having a pressure responsive movable diaphragm which effectively forms a wall of a pressure chamber; the diaphragm upon sensing fluid pressure thereagainst is effective for accordingly varying an electrical resistance; a passage operatively interconnects the pressure chamber with a source of fluid whereby the fluid and its pressure are communicated to the pressure chamber; the passage is shown as being helically formed in order to, within a limited axial length about which the helical passage is formed, sufficiently damp perturbations in the pressure of the fluid.
    Type: Grant
    Filed: November 4, 1993
    Date of Patent: September 6, 1994
    Assignee: Hi-Stat Manufacturing Co., Inc.
    Inventor: John R. Stone
  • Patent number: 5228334
    Abstract: A pressure transducer is shown having a pressure responsive movable diaphragm which effectively forms a wall of a pressure chamber; the diaphragm upon sensing fluid pressure thereagainst is effective for accordingly varying an electrical resistance; a passage operatively interconnects the pressure chamber with a source of fluid whereby the fluid and its pressure are communicated to the pressure chamber; the passage is shown as being helically formed in order to, within a limited axial length about which the helical passage is formed, sufficiently damp perturbations in the pressure of the fluid.
    Type: Grant
    Filed: March 30, 1992
    Date of Patent: July 20, 1993
    Assignee: Hi-Stat Manufacturing Co., Inc.
    Inventor: John R. Stone