Patents by Inventor Charles H. Feathers

Charles H. Feathers 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: 5366693
    Abstract: A pressure vessel in which the air steam and liquid exhaust systems are combined and wherein all exhaust systems are directed through a water reservoir, using a single control valve and a temperature/pressure sensor in the system.
    Type: Grant
    Filed: January 21, 1992
    Date of Patent: November 22, 1994
    Assignee: MDT Corporation
    Inventors: Mel-Angeli M. Burgos, Charles H. Feathers, III, John C. Schmoegner
  • Patent number: 5313738
    Abstract: Hinge and latching structures associated with a door for a pressure vessel provides a tight and competent seal when the door is in sealed relationship with the opening of the vessel. The latching structure includes coupling structures which provide increased clamping engagement of the door in response to any increased pressure differential developed across the door.
    Type: Grant
    Filed: January 22, 1991
    Date of Patent: May 24, 1994
    Assignee: MDT Corporation
    Inventors: Bhabesh K. Thakur, Maurice Gilbert, Charles O. Hancock, Charles H. Feathers
  • Patent number: 5164161
    Abstract: Apparatus and methods for proportional control of heating of a sterilizer chamber are disclosed in the application. A sterilizer chamber has heaters mounted on the walls, a wall temperature sensor and a chamber temperature sensor. The controller is operable to adjust the heat input by turning on the heaters for a variable fraction of a selected fixed interval and off for the remainder of the interval. When on the heaters provide a substantially constant heat input per unit time. The fraction of the interval during which the heaters are on is proportional to a temperature differential which comprises a setpoint temperature minus a temperature reading from one of the sensors. The controller has two, or in an alternate embodiment three, operating modes each having a unique temperature differential.
    Type: Grant
    Filed: February 1, 1991
    Date of Patent: November 17, 1992
    Assignee: MDT Corporation
    Inventors: Charles H. Feathers, Charles E. Ellis
  • Patent number: 5145642
    Abstract: In an unplumbed sterilizer, a measured quantity of liquid is introduced into a partially evacuated chamber in a dump period. The liquid quantity is automatically controlled by closing a valve in the additional conduit upon the occurrence of either (a) the chamber pressure attaining a preset value, or (b) elapsing of a preset time, whichever occurs first.
    Type: Grant
    Filed: January 31, 1991
    Date of Patent: September 8, 1992
    Assignee: MDT Corporation
    Inventors: Charles H. Feathers, III, Bhabesh K. Thakur, Charles O. Hancock