Patents Assigned to Puritan-Bennett Corporation
  • Patent number: 6793629
    Abstract: A diagnostic device having a nose fitting used without connection to a breathing gas supply for obtaining flow data values at ambient pressure. The nose fitting is connected to a pressure or flow sensor that supplies data values to a microprocessor. The detection and measurement of breathing gas flow is made from a tight sealing nose fitting (mask or prongs) configured with a resistive element inserted in the flow stream as breathing gas exits from and enters into the fitting. The nasal fitting is further provided with a port for connection to a flow or pressure transducer. The resistive element causes a pressure difference to occur between the upstream side and the downstream side when air flows through the element. The data values may be stored in computer memory to be analyzed for flow limitations.
    Type: Grant
    Filed: November 7, 2002
    Date of Patent: September 21, 2004
    Assignees: New York University, Puritan-Bennett Corporation
    Inventors: David M. Rapoport, Robert G. Norman, Roger A. Gruenke
  • Patent number: 6299581
    Abstract: In the treatment of obstructive sleep apnea, a method and apparatus are disclosed for optimizing the controlled positive pressure to minimize the flow of air from a flow generator while still ensuring that flow limitation in the patient's airway does not occur. In particular, the invention relates to a breathing device and method of use to adjust a controlled positive pressure to the airway of a patient by detecting flow limitation from analysis of an inspiratory flow waveform. Once the presence of flow limitation has been analyzed, the system determines an action to take for adjustment of the controlled positive pressure. The pressure setting is raised, lowered or maintained depending on whether flow limitation has been detected and on the previous actions taken by the system.
    Type: Grant
    Filed: May 10, 1996
    Date of Patent: October 9, 2001
    Assignees: New York University, Puritan Bennett Corporation
    Inventors: David M. Rapoport, Robert G. Norman, Roger A. Gruenke
  • Patent number: 6041783
    Abstract: A motion transducer is embedded in a section of cable interconnecting a primary medical sensor with associated electronics. By affixing the section containing the transducer to a portion of a patient's anatomy, information relating to the parameter of primary concern as well as the patient's activity can be gathered without the complexity normally associated with instrumenting a patient for the acquisition of such data.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: March 28, 2000
    Assignee: Nellcor Puritan Bennett Corporation
    Inventor: Roger A. Gruenke
  • Patent number: 5957132
    Abstract: A mask and harness system for use in providing breathing oxygen and protection from pollutants for the eyes and respiratory system as might be encountered in high altitude aviation environments. In one preferred embodiment, the mask system has a face seal, a soft flexible lens, a pneumatically-actuated harness, and a regulator with microphone to control the flow of oxygen and to facilitate communications in aircraft flight decks and other aircraft compartments. The system is designed for required five-second donning with one hand and because of the flexible lens, is capable of storage in the relatively preferred on crowded flight decks. It is connected to an oxygen source and, optionally, with aircraft communications. The regulator controls the flow rate of oxygen to the wearer based on altitude and physiological requirements. The regulator includes a valve for purging the condensation-prone moist gases from the lens area and provides positive pressure in the mask.
    Type: Grant
    Filed: March 19, 1997
    Date of Patent: September 28, 1999
    Assignee: Puritan-Bennett Corporation
    Inventors: Thomas K. McDonald, Gary R. Hannah, Randy G. Stratman, Gregory R. Jones
  • Patent number: 5934274
    Abstract: The gas mixing apparatus provides the components of a breathing gas for mixing at approximately ambient atmospheric pressure, and regulates the pressure of a selected gas to approximately ambient atmospheric pressure for mixing with air at ambient atmospheric pressure. The gas mixing apparatus includes a piston disposed within a pump chamber. A flow limiting inlet controls introduction of a first selected gas such as oxygen for mixing with a second selected gas such as air. The pressure of the first selected gas is limited to an acceptable maximum pressure, so that even if a valve for admitting the first selected gas for mixing at ambient pressure fails, breathing gas will not be provided at an excessive pressure.
    Type: Grant
    Filed: June 18, 1997
    Date of Patent: August 10, 1999
    Assignee: Puritan-Bennett Corporation
    Inventors: Edwin B. Merrick, Glen N. Gee, John O'Mahony, John O'Dea
  • Patent number: 5915382
    Abstract: A piston based ventilator for delivering breathing gas to the lungs of a patient, and more particularly a piston based ventilator that delivers breathing gas to a patient upon longitudinal movement of a piston rod and associated piston head within a piston cylinder. The piston rod is centrally located within the cylinder and moves along the cylinder in response to direct drive from a motor to move the piston head within the cylinder and displace a volume of gas to be delivered to the patient.
    Type: Grant
    Filed: August 21, 1997
    Date of Patent: June 29, 1999
    Assignee: Puritan-Bennett Corporation
    Inventor: John S. Power
  • Patent number: 5909731
    Abstract: The lung ventilator safety valve circuit includes a normally open, pulse width modulated solenoid safety valve connected to a patient airway of a ventilator system. A pressure sensor monitors pressure in the patient airway, and a control unit maintains the safety valve closed when the pressure is not excessive. The safety valve is opened when the sensed pressure equals or exceeds a maximum airway pressure threshold that can be set by an operator, or in the event of a power failure.
    Type: Grant
    Filed: December 6, 1996
    Date of Patent: June 8, 1999
    Assignee: Puritan-Bennett Corporation
    Inventors: John J. O'Mahony, Floyd R. Farnham, III
  • Patent number: 5845636
    Abstract: An apparatus and method for facilitating the respiration of a patient are disclosed which are particularly useful in treating mixed and obstructive sleep apnea and certain cardiovascular conditions, among others, by increasing nasal air pressure delivered to the patient's respiratory passages just prior to inhalation and by subsequently decreasing the pressure to ease exhalation effort. The preferred apparatus includes a patient-coupled gas delivery device for pressurizing the patient's nasal passages at a controllable pressure, and a controller coupled with the delivery device having a pressure transducer for monitoring the nasal pressure and a microcontroller for selectively controlling the nasal pressure. In operation, the controller determines a point in the patient breathing cycle just prior to inhalation and initiates an increase in nasal pressure at that point in order to stimulate normal inhalation, and subsequently lowers the nasal pressure to ease exhalation efforts.
    Type: Grant
    Filed: August 16, 1996
    Date of Patent: December 8, 1998
    Assignee: Puritan Bennett Corporation
    Inventors: Roger A. Gruenke, Russell L. Trimble
  • Patent number: 5829431
    Abstract: A microphone signal attenuating breathing mask body having a gas port for inhalation of a gas to the wearer in a flow stream therethrough. A demand microphone is mounted to the mask and is coupled to an electromagnetic switch responsive to a predetermined magnetic field for switching from an actuation to an attenuation position to block transmission of sound from the microphone. An air vane is pivotally mounted on the mask body and is formed with an impingement pad positioned in the flow stream and mounts an activating magnet disposed adjacent the switch. The vane is normally disposed in a normal position such that the magnet is in an activating position and the electromagnetic switch is in the actuation position such that the microphone is active for transmission of audio signals.
    Type: Grant
    Filed: February 25, 1997
    Date of Patent: November 3, 1998
    Assignee: Puritan-Bennett Corporation
    Inventors: Gary R. Hannah, Randy G. Stratman
  • Patent number: 5813399
    Abstract: The method and system for controlling airway pressure in a ventilator during the inspiratory cycle involves controlling the flow of breathing gas through a flow supply valve venting the breathing gas at a desired rate of outflow through a relief valve to achieve the desired airway pressure. Measurements of the rates of actual supply flow, the actual outflow through the exhalation/relief valve, and the pressure in the airway are compared with desired values for determination the amount of error for feedback control of the ventilator system.
    Type: Grant
    Filed: January 10, 1997
    Date of Patent: September 29, 1998
    Assignee: Puritan Bennett Corporation
    Inventors: Fernando J. Isaza, Stanley Y. Wong
  • Patent number: 5673689
    Abstract: A piston based ventilator for delivering breathing gas to the lungs of a patient, and more particularly a piston based ventilator that delivers breathing gas to a patient upon longitudinal movement of a piston rod and associated piston head within a piston cylinder. The piston rod is centrally located within the cylinder and moves along the cylinder in response to direct drive from a motor to move the piston head within the cylinder and displace a volume of gas to be delivered to the patient.
    Type: Grant
    Filed: August 27, 1996
    Date of Patent: October 7, 1997
    Assignee: Puritan Bennett Corporation
    Inventor: John S. Power
  • Patent number: 5664560
    Abstract: The gas mixing apparatus provides the components of a breathing gas for mixing at approximately ambient atmospheric pressure, and regulates the pressure of a selected gas to approximately ambient atmospheric pressure for mixing with air at ambient atmospheric pressure. The gas mixing apparatus includes a piston disposed within a pump chamber. A flow limiting inlet controls introduction of a first selected gas such as oxygen for mixing with a second selected gas such as air. The pressure of the first selected gas is limited to an acceptable maximum pressure, so that even if a valve for admitting the first selected gas for mixing at ambient pressure fails, breathing gas will not be provided at an excessive pressure.
    Type: Grant
    Filed: July 31, 1996
    Date of Patent: September 9, 1997
    Assignee: Puritan-Bennett Corporation
    Inventors: Edwin B. Merrick, Glen N. Gee, John O'Mahony, John O'Dea
  • Patent number: 5664566
    Abstract: A mask and harness system for use in providing breathing oxygen and protection from pollutants for the eyes and respiratory system as might be encountered in high altitude aviation environments. In one preferred embodiment, the mask system has a face seal, a soft flexible lens, a pneumatically-actuated harness, and a regulator with microphone to control the flow of oxygen and to facilitate communications in aircraft flight decks and other aircraft compartments. The system is designed for required five-second donning with one hand and because of the flexible lens, is capable of storage in the relatively preferred on crowded flight decks. It is connected to an oxygen source and, optionally, with aircraft communications. The regulator controls the flow rate of oxygen to the wearer based on altitude and physiological requirements. The regulator includes a valve for purging the condensation-prone moist gases from the lens area and provides positive pressure in the mask.
    Type: Grant
    Filed: September 30, 1994
    Date of Patent: September 9, 1997
    Assignee: Puritan-Bennett Corporation
    Inventors: Thomas K. McDonald, Gary R. Hannah, Randy G. Stratman, Gregory R. Jones
  • Patent number: 5660171
    Abstract: The system and method for flow triggering pressure supported ventilation include a source of a predetermined, preinspiratory, constant flow of breathing gas to a patient, one or more flow sensors for measuring the rate of gas flow in a flow path communicating with the patient, means for determining when inhalation from the flow path has occurred, and means for generating pressure support in the delivered gas flow in response to inhalation by the patient, means to terminate pressure support when inspiratory phase concludes, and means to reestablish the predetermined, preinspiratory, continuous flow of breathing prior to the patient's next inspiratory effort. A plurality of individual gas sources preferably provide a controlled mixture of breathing gas. In combination with pressure support to the patient during the inspiration effort, the flow triggering strategy of the invention offers significant improvements in providing breath support to patients having weakened respiratory capabilities.
    Type: Grant
    Filed: August 21, 1996
    Date of Patent: August 26, 1997
    Assignee: Puritan-Bennett Corporation
    Inventors: Gardner J. Kimm, Glen N. Gee, Paul J. Fennema, Warren G. Sanborn
  • Patent number: 5632270
    Abstract: Patient airway baseline pressure levels are controlled in a ventilator having a pneumatically controlled exhalation valve without an external supply of pilot pressure, by supplying an internal source of controllable pilot pressure for operating the exhalation valve. The pressure of pressurized air supplied by an internal pump can be electrically controlled by pulse width modulation of a variable pulse duration signal. A second source of pressurized air for pilot pressure is provided, and in one embodiment is a reservoir provided for receiving pressurized air from the pump and from the exhalation circuit. A valve is connected to the pump means and the reservoir for receiving pressurized air from the pump in a first position, and for receiving pressurized air from the reservoir in a second position. When the valve means is in the second position, pressurized air is delivered at a pressure which is the greater of the pressurized air supplied by the pump means or the gas flow from the exhalation circuit.
    Type: Grant
    Filed: September 12, 1994
    Date of Patent: May 27, 1997
    Assignee: Puritan-Bennett Corporation
    Inventors: John J. O'Mahony, Floyd R. Farnham, III
  • Patent number: 5605145
    Abstract: A microphone signal attenuating breathing mask body having a gas port for inhalation of a gas to the wearer in a flow stream therethrough. A demand microphone is mounted to the mask and is coupled to an electromagnetic switch responsive to a predetermined magnetic field for switching from an actuation to an attenuation position to block transmission of sound from the microphone. An air vane is pivotally mounted on the mask body and is formed with an impingement pad positioned in the flow stream and mounts an activating magnet disposed adjacent the switch. The vane is normally disposed in a normal position such that the magnet is in an activating position and the electromagnetic switch is in the actuation position such that the microphone is active for transmission of audio signals.
    Type: Grant
    Filed: July 18, 1995
    Date of Patent: February 25, 1997
    Assignee: Puritan-Bennett Corporation
    Inventors: Gary R. Hannah, Randy G. Stratman
  • Patent number: 5596984
    Abstract: The lung ventilator safety valve circuit includes a normally open, pulse width modulated solenoid safety valve connected to a patient airway of a ventilator system. A pressure sensor monitors pressure in the patient airway, and a control unit maintains the safety valve closed when the pressure is not excessive. The safety valve is opened when the sensed pressure equals or exceeds a maximum airway pressure threshold that can be set by an operator, or in the event of a power failure.
    Type: Grant
    Filed: September 12, 1994
    Date of Patent: January 28, 1997
    Assignee: Puritan-Bennett Corporation
    Inventors: John J. O'Mahony, Floyd R. Farnham, III
  • Patent number: 5574497
    Abstract: The invention is a compact multi-camera closed circuit video television system for use in commercial aircraft. The arrangement of the cameras and the construction of the system are arranged to allow installation within either the pressurized or unpressurized portions of the aircraft, and the video cameras are arranged to provide multiple views of the exterior of the aircraft under the control of the flight crew.
    Type: Grant
    Filed: July 13, 1995
    Date of Patent: November 12, 1996
    Assignee: Puritan Bennett Corporation
    Inventors: Thomas D. Henderson, James M. McCann
  • Patent number: 5549106
    Abstract: An apparatus and method for facilitating the respiration of a patient are disclosed which are particularly useful in treating mixed and obstructive sleep apnea and certain cardiovascular conditions, among others, by increasing nasal air pressure delivered to the patient's respiratory passages just prior to inhalation and by subsequently decreasing the pressure to ease exhalation effort. The preferred apparatus includes a patient-coupled gas delivery device for pressurizing the patient's nasal passages at a controllable pressure, and a controller coupled with the delivery device having a pressure transducer for monitoring the nasal pressure and a microcontroller for selectively controlling the nasal pressure. In operation, the controller determines a point in the patient breathing cycle just prior to inhalation and initiates an increase in nasal pressure at that point in order to stimulate normal inhalation, and subsequently lowers the nasal pressure to ease exhalation efforts.
    Type: Grant
    Filed: July 21, 1993
    Date of Patent: August 27, 1996
    Assignee: Puritan-Bennett Corporation
    Inventors: Roger A. Gruenke, Russell L. Trimble
  • Patent number: 5531221
    Abstract: The piston ventilators include a double acting reciprocating piston, in which the piston motion delivering breathing gas to a patient receiving assistance from the ventilator simultaneously draws in breathing gas from a source of breathing gas, and a single acting piston ventilator, in which only the delivery end of the cylinder is provided with inlet and exhaust valves. In the double acting piston ventilator, breathing gas is supplied to both ends of the piston cylinder through two intake valves, and exhausting breathing gas through two exhaust valves. Both intake valves of the cylinder are ducted to the breathing gas supply, and the two exhaust valves of the cylinder are ducted to a gas delivery limb of the ventilator connected to the patient's airway.
    Type: Grant
    Filed: September 12, 1994
    Date of Patent: July 2, 1996
    Assignee: Puritan Bennett Corporation
    Inventors: John S. Power, John J. O'Mahony, Edwin B. Merrick