Patents by Inventor Ernest W. Cassaday

Ernest W. Cassaday 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: 6024720
    Abstract: An improved fluid management system for irrigation of a body cavity and in particular for use in arthroscopic surgery having a pressurized fluid circuit for supplying irrigation fluid and a vacuum fluid circuit for withdrawing waste fluid from the cavity. In a preferred embodiment there is an uninterrupted fluid supply comprised of a plurality of sterile solution saline bags with an automatic spiker to perforate the bags. The system is processor controlled with numerous safety and design features to automate arthroscopy to the highest degree possible. Some of the features include the monitoring and tracking of cavity pressure and flow rates to predetermined pressure and flow rates, tracking cavity to mean blood pressure, overpressure protection, a plurality of pressure and flow rate baseline settings, monitoring, setting and controlling saline supply, and specialized functions for providing pressure and flow rates for typical surgical procedures such as lavage, clear view, and burr/shaver.
    Type: Grant
    Filed: August 28, 1998
    Date of Patent: February 15, 2000
    Assignee: Aquarius Medical Corporation
    Inventors: W. Jeffrey Chandler, John Kane, Michael J. Egan, Howard S. Phillips, James S. Roundy, Ernest W. Cassaday, Roger Etherington
  • Patent number: 5830180
    Abstract: An improved fluid management system for irrigation of a body cavity and in particular for use in arthroscopic surgery having a pressurized fluid circuit for supplying irrigation fluid and a vacuum fluid circuit for withdrawing waste fluid from the cavity. In a preferred embodiment there is an uninterrupted fluid supply comprised of a plurality of sterile solution saline bags with an automatic spiker to perforate the bags. The system is processor controlled with numerous safety and design features to automate arthroscopy to the highest degree possible. Some of the features include the monitoring and tracking of cavity pressure and flow rates to predetermined pressure and flow rates, tracking cavity to mean blood pressure, overpressure protection, a plurality of pressure and flow rate baseline settings, monitoring, setting and controlling saline supply, and specialized functions for providing pressure and flow rates for typical surgical procedures such as lavage, clear view, and burr/shaver.
    Type: Grant
    Filed: November 8, 1996
    Date of Patent: November 3, 1998
    Assignee: Aquarius Medical Corporation
    Inventors: W. Jeffrey Chandler, John Kane, Michael J. Egan, Howard S. Phillips, James S. Roundy, Ernest W. Cassaday, Roger Etherington
  • Patent number: 5386716
    Abstract: Fluidic proximity sensing apparatus for use with a linear induction motor car. The apparatus is comprised of a floating sensor head in operative combination with a dual flapper valve which forms two air gaps. A change in the proximity of the sensor head to a track surface is converted to a dimensional variation in the air gaps, which in turn is sensed by fluidic oscillators.
    Type: Grant
    Filed: January 26, 1994
    Date of Patent: February 7, 1995
    Assignee: AlliedSignal Inc.
    Inventors: John F. Thurston, Ernest W. Cassaday, George W. Carrie
  • Patent number: 5362987
    Abstract: A fluidic generator (38) employing a fluidic feedback oscillator (12) in combination with a magnetogenerator (41) is described. Oscillational changes in pressure produced within the feedback oscillator are transmitted to opposite sides of a pole cap (74) which reciprocates a coil (70) in a magnetic field.
    Type: Grant
    Filed: December 23, 1992
    Date of Patent: November 8, 1994
    Assignee: AlliedSignal Inc.
    Inventors: Ernest W. Cassaday, John F. Thurston, Stuart L. Booth
  • Patent number: 5237853
    Abstract: A process for monitoring fluid density by use of a fluidic jet oscillator (26) absent the necessity for a high-precision pressure regulator. Fluid is delivered to the fluidic oscillator (26) via a pressure divider (28). As the fluid flows through the oscillator the latter generates a pressure wavetrain at a frequency which is indicative of the density of the fluid, but is inaccurate to the extent that the pressure difference across the oscillator varies from a predetermined value. A differential pressure transducer (30) senses the pressure difference. Accordingly, the process is adapted for use with a gated sampling and control system (84) which operatively responds to the oscillator output only when the differential pressure is substantially in accord with a predetermined value thereof.
    Type: Grant
    Filed: September 14, 1992
    Date of Patent: August 24, 1993
    Assignee: AlliedSignal Inc.
    Inventors: Ernest W. Cassaday, James S. Roundy