Patents by Inventor Dale E. Finch

Dale E. Finch 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).

  • Linear control valve
    Patent number: 5556073
    Abstract: A linear control valve that includes a flexible cantilevered beam having a seal mounted thereon that is arranged to open and close against a fluid port as the beam is flexed. The free end of the beam is in contact with a motor driven deflector and the amount of flexure controlled by selectively positioning the motor.
    Type: Grant
    Filed: February 1, 1995
    Date of Patent: September 17, 1996
    Assignee: Welch Allyn, Inc.
    Inventors: Thaddeus J. Wawro, Alan S. Knieriem, Zoran I. Psenicnik, Dale E. Finch
  • Intravenous monitoring system utilizing a dynamic reference threshold
    Patent number: 4498901
    Abstract: An intravenous monitoring system in which dynamic reference threshold circuitry is used to provide output signals indicating the presence of liquid passing through the drip chamber of an intravenous feeding apparatus. A light sensor that detects the presence of liquid passing through the drip chamber generates a detecting signal that is amplified and processed by the dynamic reference threshold circuitry. The dynamic reference threshold circuitry comprises a comparator circuit, and a D.C. component reference circuit that provides the reference threshold to the comparator circuit. The amplified detecting signal is directed both to an input of the comparator circuit and the D.C. component reference circuit. The D.C. component reference circuit uses a diode to produce a voltage drop in the amplified detecting signal and an RC circuit to both store and emit a residual signal when there is a sudden drop in the amplified detecting signal.
    Type: Grant
    Filed: July 30, 1982
    Date of Patent: February 12, 1985
    Assignee: Abbott Laboratories
    Inventor: Dale E. Finch
  • Intravenous monitoring system utilizing a dynamic reference threshold
    Patent number: 4490140
    Abstract: An intravenous monitoring system in which dynamic reference threshold circuitry is used to provide output signals indicating the presence of liquid passing through the drip chamber of an intravenous feeding apparatus. A light sensor that detects the presence of liquid passing through the drip chamber generates a detecting signal that is amplified and processed by the dynamic reference threshold circuitry. The dynamic reference threshold circuitry comprises a comparator circuit, and a D.C. component reference circuit that provides the reference threshold to the comparator circuit. The amplified detecting signal is directed both to an input of the comparator circuit and the D.C. component reference circuit. The D.C. component reference circuit uses a diode to produce a voltage drop in the amplified detecting signal and an RC circuit to both store and emit a residual signal when there is a sudden drop in the amplified detecting signal.
    Type: Grant
    Filed: July 30, 1982
    Date of Patent: December 25, 1984
    Assignee: Abbott Laboratories
    Inventors: Travis C. Carr, Dale E. Finch