Patents by Inventor Leo J. Lichte

Leo J. Lichte 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: 5586085
    Abstract: A container having affixed thereto an ultrasonic transducer, including a connection for electrically linking the transducer to electronic circuitry located outside the container. Flexible and semi-rigid containers having rigid structures surrounding the signal path of an ultrasonic transducer are also provided. In addition, adaptors are disclosed for use in connecting an ultrasonic transducer to a container. Such adaptors can include a rigid tubular member, a tubular outlet connected to the tubular member for draining liquid from a container, and a seat for engaging an ultrasonic transducer.
    Type: Grant
    Filed: January 24, 1994
    Date of Patent: December 17, 1996
    Inventor: Leo J. Lichte
  • Patent number: 5303585
    Abstract: A volume sensing system includes electronic circuitry which is electrically connected to an ultrasonic transducer. The transducer is affixed by means of an adaptor to the base of a container having a known configuration. The container holds a liquid and a gas so that a liquid-gas boundary is formed within the container. The transducer generates ultrasonic pulses which propagate through the liquid, are reflected at the liquid-gas boundary, and are received again by the transducer. The received return pulse is converted into an electrical signal which is analyzed by the electronic circuitry to determine the level of the liquid within the container. The level of the liquid within the container is then employed to determine the volume of the liquid within the container in accordance with the configuration of the container. In a preferred embodiment, the adaptor includes an indicator which may be used to identify the configuration of the container.
    Type: Grant
    Filed: October 31, 1991
    Date of Patent: April 19, 1994
    Assignee: JTL Medical Corporation
    Inventor: Leo J. Lichte
  • Patent number: 5279601
    Abstract: Disclosed is a vacuum regulator apparatus such as for automatically establishing and maintaining a predetermined vacuum for withdrawing fluid from a chest cavity. The apparatus comprises a water manometer or vacuum regulator portion and a water seal portion. Atmospheric air is vented into the vacuum line through the vacuum regulator portion by displacing a predetermined height column of a fluid such as water. A filter is disclosed for preventing the escape of water from the manometer portion of the apparatus into the downstream vacuum source. A second filter is disclosed for permitting two way gas flow at the upstream end of the manometer portion, but for substantially preventing fluid flow in an upstream direction out of the manometer. Fluid fill ports are disclosed on the manometer and water seal portions for permitting infusion of water to precise and repeatable column heights.
    Type: Grant
    Filed: November 14, 1991
    Date of Patent: January 18, 1994
    Assignee: JTL Medical Corporation
    Inventor: Leo J. Lichte
  • Patent number: 5197178
    Abstract: A computer terminal keyboard is sealed by a molded elastomeric top cover, shaped to conform to the housing and keys of the keyboard, and a bottom cover shaped to enclose the base of and secure the top cover around its periphery to the keyboard housing. The top cover is shaped to provide a substantially planar surface on the top plate with elevated individual key covers integrally formed in the top cover. Portitons of the top cover extending over the top face and sides of the keyboard housing are formed in a first thickness sufficient to provide a durable covering. Portions of the top cover immediately adjacent and between the individual key covers, and the sides of the key covers, are formed in a reduced, second thickness to allow for flexure as the keys are depressed. The top surface of the top cover is planar so that spilled liquid and debris are easily wiped or brushed away from around and between the key covers.
    Type: Grant
    Filed: August 2, 1990
    Date of Patent: March 30, 1993
    Assignee: Tektronix, Inc.
    Inventors: Leo J. Lichte, Robert H. Leith, Meryl E. Miller, Leroy N. Nopper, Jr., Terrence K. Jones
  • Patent number: 5087250
    Abstract: The disclosure herein sets forth a pleural drainage/autotransfusion unit in combination with a cardiotomy reservoir having a vacuum regulating chamber in connected relationship to the pleural drainage/autotransfusion unit. The vacuum regulating chamber is formed of a portion of said cardiotomy reservoir unit and extends along the axial direction of the reservoir of the autotransfusion unit and can be connected to a source of vacuum. A water seal is interposed between the vacuum regulating chamber and the interior of the reservoir in order to provide for water sealed negative pressure within the reservoir. The function of the cardiotomy reservoir and the pleural drainage/autotransfusion unit can be changed by means of connections that have spring loaded tangs that engage a flange of a barbed inlet port.
    Type: Grant
    Filed: February 16, 1990
    Date of Patent: February 11, 1992
    Assignee: Gish Biomedical, Inc.
    Inventors: Leo J. Lichte, Jack W. Brown
  • Patent number: 4969879
    Abstract: The disclosure herein discloses a levered set of barbs, tangs or jaws for engaging a shoulder of a port from a body fluid device. The port of the body fluid device can have a shoulder or a series of barbs and a shoulder. Interiorly of the connector is a resilient interior member. The interior member is sloped interiorly to match the end region of the port. It receives the end of the port in displaced relationship in a manner whereby the interior member provides a seat that deforms against the end of the port as well as deforming outwardly to provide an angularly sloped member and a resilient seat in combination with each other for an expanded seated seal.
    Type: Grant
    Filed: July 26, 1988
    Date of Patent: November 13, 1990
    Assignee: Gish Biomedical, Inc.
    Inventor: Leo J. Lichte
  • Patent number: 4343049
    Abstract: This invention relates to the electrochemical machining of integrally formed prosthetic heart valve structures in which both the structural integrity of the valve and the blood flow through the valve is improved as a result of the integral formation of the valve structure. In particular, such heart valves comprise a ring and a pendant structure, such as a strut, for supporting the opening and closing of a discoid valve occluder. Integral formation of the strut with the ring permits the cross-sectional shape of the strut to be machined without overheating and distortion to conform to a teardrop shape having favorable fluid-dynamic characteristics thereby improving the flow of blood through the valve across the strut. The integral formation of the strut with the ring further results in the elimination of the weld fillet between the strut and the ring, thereby permitting the height of the ring to be reduced, which further improves the fluid dynamic characteristics of the valve.
    Type: Grant
    Filed: December 1, 1980
    Date of Patent: August 10, 1982
    Assignee: Shiley, Inc.
    Inventors: Bruce E. Fettel, Paul E. Morris, Leo J. Lichte
  • Patent number: 4276132
    Abstract: This invention relates to the electrochemical machining of integrally formed prosthetic heart valve structures in which both the structural integrity of the valve and the blood flow through the valve is improved as a result of the integral formation of the valve structure. In particular, such heart valves comprise a ring and a pendant structure, such as a strut, for supporting the opening and closing of a discoid valve occluder. Integral formation of the strut with the ring permits the cross-sectional shape of the strut to be machined without overheating and distortion to conform to a teardrop shape having favorable fluid-dynamic characteristics thereby improving the flow of blood through the valve across the strut. The integral formation of the strut with the ring further results in the elimination of the weld fillet between the strut and the ring, thereby permitting the height of the ring to be reduced, which further improves the fluid dynamic characteristics of the valve.
    Type: Grant
    Filed: March 8, 1979
    Date of Patent: June 30, 1981
    Assignee: Shiley Incorporated
    Inventors: Bruce E. Fettel, Paul E. Morris, Leo J. Lichte
  • Patent number: 4201344
    Abstract: The present invention discloses a reversible turbine-driven sprinkler head which includes a vaned turbine motor for rotatably driving a nozzle. The turbine is unresponsive to the norml flow of fluid through the sprinkler head to the nozzle. Switchable deflection means are included for deflecting the flow of fluid through the body against the turbine to cause rotation thereof in either of two directions. By deflecting the fluid flow to cause the turbine to rotate in one direction, the nozzle is rotated in one direction. By switching the direction of fluid deflection to cause the turbine to flow in the opposite direction, the nozzle is rotated in the opposite direction. Adjustable means are provided for setting the positions relative to the rotation of the nozzle whereat the deflection of the fluid flow is reversed, whereby the nozzle is caused to repeatably oscillate between a first and a second position.
    Type: Grant
    Filed: December 23, 1977
    Date of Patent: May 6, 1980
    Assignee: The Toro Company
    Inventor: Leo J. Lichte
  • Patent number: D322124
    Type: Grant
    Filed: July 13, 1989
    Date of Patent: December 3, 1991
    Assignee: Gish Biomedical Inc.
    Inventors: Leo J. Lichte, Jack W. Brown