Patents by Inventor Malcolm R. Williams
Malcolm R. Williams 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).
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Patent number: 9962514Abstract: Described herein is a flow control valve for a ventilator that controls gas flow through a patient line in response to a target pressure within the line. The valve controls gas flow by (i) providing both a high frequency signal and a low frequency signal through a coil positioned in a fixed magnetic field, (ii) determining a position of the coil by detecting the high frequency signal, and (iii) controlling a position of the coil by adjusting the low frequency signal based on the determined position and/or velocity of the coil.Type: GrantFiled: June 27, 2014Date of Patent: May 8, 2018Assignee: VYAIRE MEDICAL CAPITAL LLCInventors: Malcolm R. Williams, Adrian D. DeSilva, Huy Thanh Vu
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Patent number: 9962515Abstract: Described herein is an exhalation valve for a ventilator that controls gas flow through a patient exhalation line in response to a target pressure within the line. The valve controls gas flow by (i) providing both a high frequency signal and a low frequency signal through a coil positioned in a fixed magnetic field, (ii) determining a position of the coil by detecting the high frequency signal, and (iii) controlling a position of the coil by adjusting the low frequency signal.Type: GrantFiled: August 10, 2016Date of Patent: May 8, 2018Assignee: CAREFUSION 303, INC.Inventors: Malcolm R. Williams, Adrian D. DeSilva, Huy Thanh Vu
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Patent number: 9713438Abstract: A bi-directional flow sensor may be adapted for reducing pneumatic noise during pressure sensing with a flow passing through the flow sensor. The flow sensor may include a hollow, tubular member having a throat section disposed between a ventilator end and a patient end. A flow restrictor may be disposed in the throat section and may be adapted to measure differential pressure in the flow. A baffle may be mounted at the ventilator end and may be adapted to minimize non-axial flow at pressure taps located on opposing ends of the flow restrictor. The patient end may include a flow obstruction configured to promote uniform velocity across the flow at the pressure taps during exhalation flow from the patient end to the ventilator end. The flow sensor can minimize pneumatic noise to less than 0.1 LPM to allow accurate patient flow measurement and triggering of inhalation and exhalation phases at flow rates of 0.2 LPM.Type: GrantFiled: May 16, 2016Date of Patent: July 25, 2017Assignee: CareFusion 203, Inc.Inventors: Todd W. Allum, Malcolm R. Williams, Joseph Cipollone
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Publication number: 20160346499Abstract: Described herein is an exhalation valve for a ventilator that controls gas flow through a patient exhalation line in response to a target pressure within the line. The valve controls gas flow by (i) providing both a high frequency signal and a low frequency signal through a coil positioned in a fixed magnetic field, (ii) determining a position of the coil by detecting the high frequency signal, and (iii) controlling a position of the coil by adjusting the low frequency signal.Type: ApplicationFiled: August 10, 2016Publication date: December 1, 2016Inventors: Malcolm R. WILLIAMS, Adrian D. DeSILVA, Huy Thanh VU
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Publication number: 20160256074Abstract: A bi-directional flow sensor may be adapted for reducing pneumatic noise during pressure sensing with a flow passing through the flow sensor. The flow sensor may include a hollow, tubular member having a throat section disposed between a ventilator end and a patient end. A flow restrictor may be disposed in the throat section and may be adapted to measure differential pressure in the flow. A baffle may be mounted at the ventilator end and may be adapted to minimize non-axial flow at pressure taps located on opposing ends of the flow restrictor. The patient end may include a flow obstruction configured to promote uniform velocity across the flow at the pressure taps during exhalation flow from the patient end to the ventilator end. The flow sensor can minimize pneumatic noise to less than 0.1 LPM to allow accurate patient flow measurement and triggering of inhalation and exhalation phases at flow rates of 0.2 LPM.Type: ApplicationFiled: May 16, 2016Publication date: September 8, 2016Inventors: Todd W. ALLUM, Malcolm R. WILLIAMS, Joseph CIPOLLONE
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Patent number: 9433743Abstract: Described herein is an exhalation valve for a ventilator that controls gas flow through a patient exhalation line in response to a target pressure within the line. The valve controls gas flow by (i) providing both a high frequency signal and a low frequency signal through a coil positioned in a fixed magnetic field, (ii) determining a position of the coil by detecting the high frequency signal, and (iii) controlling a position of the coil by adjusting the low frequency signal.Type: GrantFiled: June 28, 2013Date of Patent: September 6, 2016Assignee: CAREFUSION 303, INC.Inventors: Malcolm R. Williams, Adrian D. Desilva, Huy Thanh Vu
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Patent number: 9375166Abstract: A bi-directional flow sensor may be adapted for reducing pneumatic noise during pressure sensing with a flow passing through the flow sensor. The flow sensor may include a hollow, tubular member having a throat section disposed between a ventilator end and a patient end. A flow restrictor may be disposed in the throat section and may be adapted to measure differential pressure in the flow. A baffle may be mounted at the ventilator end and may be adapted to minimize non-axial flow at pressure taps located on opposing ends of the flow restrictor. The patient end may include a flow obstruction configured to promote uniform velocity across the flow at the pressure taps during exhalation flow from the patient end to the ventilator end. The flow sensor can minimize pneumatic noise to less than 0.1 LPM to allow accurate patient flow measurement and triggering of inhalation and exhalation phases at flow rates of 0.2 LPM.Type: GrantFiled: November 17, 2014Date of Patent: June 28, 2016Assignee: CareFusion 203, Inc.Inventors: Todd W. Allum, Malcolm R. Williams, Joseph Cipollone
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Publication number: 20150073292Abstract: A bi-directional flow sensor may be adapted for reducing pneumatic noise during pressure sensing with a flow passing through the flow sensor. The flow sensor may include a hollow, tubular member having a throat section disposed between a ventilator end and a patient end. A flow restrictor may be disposed in the throat section and may be adapted to measure differential pressure in the flow. A baffle may be mounted at the ventilator end and may be adapted to minimize non-axial flow at pressure taps located on opposing ends of the flow restrictor. The patient end may include a flow obstruction configured to promote uniform velocity across the flow at the pressure taps during exhalation flow from the patient end to the ventilator end. The flow sensor can minimize pneumatic noise to less than 0.1 LPM to allow accurate patient flow measurement and triggering of inhalation and exhalation phases at flow rates of 0.2 LPM.Type: ApplicationFiled: November 17, 2014Publication date: March 12, 2015Inventors: Todd W. ALLUM, Malcolm R. WILLIAMS, Joseph CIPOLLONE
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Publication number: 20150007815Abstract: Described herein is a modular ventilator. The ventilator has modular flow control devices, which are connected to fluid inlet adapters. The modular flow control devices have sensors for controlling fluid flow through the modular flow control devices. The fluid inlet adapters are removable, and can include magnetic indicators, and the ventilator can identify the fluid from the magnetic indicator. The ventilator can also contain or be connected to a device having a low-noise blower.Type: ApplicationFiled: June 27, 2014Publication date: January 8, 2015Inventors: Steven DUQUETTE, Adrian D. DeSILVA, Richard LE, Jeffrey Harold MILLER, Hector GONZALEZ, Raul VALDEZ, Chiun WANG, Malcolm R. WILLIAMS, Huy Thanh VU
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Publication number: 20150000662Abstract: Described herein is an exhalation valve for a ventilator that controls gas flow through a patient exhalation line in response to a target pressure within the line. The valve controls gas flow by (i) providing both a high frequency signal and a low frequency signal through a coil positioned in a fixed magnetic field, (ii) determining a position of the coil by detecting the high frequency signal, and (iii) controlling a position of the coil by adjusting the low frequency signal.Type: ApplicationFiled: June 28, 2013Publication date: January 1, 2015Inventors: Malcolm R. WILLIAMS, Adrian D. DESILVA, Huy Thanh VU
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Publication number: 20150000663Abstract: Described herein is a flow control valve for a ventilator that controls gas flow through a patient line in response to a target pressure within the line. The valve controls gas flow by (i) providing both a high frequency signal and a low frequency signal through a coil positioned in a fixed magnetic field, (ii) determining a position of the coil by detecting the high frequency signal, and (iii) controlling a position of the coil by adjusting the low frequency signal based on the determined position and/or velocity of the coil.Type: ApplicationFiled: June 27, 2014Publication date: January 1, 2015Inventors: Malcolm R. WILLIAMS, Adrian D. DeSILVA, Huy Thanh VU
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Patent number: 8888711Abstract: A bi-directional flow sensor is adapted for reducing pneumatic noise during pressure sensing with a flow passing through the flow sensor. The flow sensor comprises a hollow, tubular member having a throat section disposed between a ventilator end and a patient end. A flow restrictor is disposed in the throat section and is adapted to measure differential pressure in the flow. A baffle is mounted at the ventilator end and is adapted to minimize non-axial flow at pressure taps located on opposing ends of the flow restrictor. The patient end includes a flow obstruction configured to promote uniform velocity across the flow at the pressure taps during exhalation flow from the patient end to the ventilator end. The flow sensor minimizes pneumatic noise to less than 0.1 LPM to allow accurate patient flow measurement and triggering of inhalation and exhalation phases at flow rates of 0.2 LPM.Type: GrantFiled: April 8, 2008Date of Patent: November 18, 2014Assignee: Carefusion 203, Inc.Inventors: Todd W. Allum, Malcolm R. Williams, Joseph Cipollone
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Patent number: 7849854Abstract: A ventilator device and system comprising a rotating compressor, preferably a drag compressor, which, at the beginning of each inspiratory ventilation phase, is accelerated to a sufficient speed to deliver the desired inspiratory gas flow, and is subsequently stopped or decelerated to a basal flow level to permit the expiratory ventilation phase to occur. The ventilator device is small and light weight enough to be utilized in portable applications. The ventilator device is power efficient enough to operate for extended periods of time on internal or external batteries. Also provided is an oxygen blending apparatus which utilizes solenoid valves having specific orifice sizes for blending desired amounts of oxygen into the inspiratory gas flow. Also provided is an exhalation valve having an exhalation flow transducer which incorporates a radio frequency data base to provide an attendant controller with specific calibration information for the exhalation flow transducer.Type: GrantFiled: September 7, 2004Date of Patent: December 14, 2010Assignee: Bird Products CorporationInventors: Douglas F. DeVries, Michael J. Cegielski, Warner V. Graves, Jr., Malcolm R. Williams, Michael B. Holmes
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Patent number: 7527053Abstract: The invention comprises a method and apparatus for reducing the noise generated by compressors, including Roots-type blowers. The invention has particular use for reducing noise generated by compressors used in mechanical ventilators, though the advantages thereof may be realized in many different applications. One embodiment of the invention comprises a noise-attenuating gas flow path for a compressor contained in a portable ventilator housing. In one embodiment, the gas flow path comprises a plurality of chambers interconnected by flow tubes. The flow path is folded so as to fit into the limited space of a portable ventilator housing. The dimensions of the chambers and the flow tubes are selected so that an impedance mismatch is created between the chambers and the flow tubes. In one embodiment of the invention, the flow path comprises one or more perforated tubes located in one or more of the chambers.Type: GrantFiled: March 23, 2005Date of Patent: May 5, 2009Assignee: Cardinal Health 203, Inc.Inventors: Douglas F. DeVries, Malcolm R. Williams
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Publication number: 20090084381Abstract: A ventilator, device and system comprising a rotating compressor, preferably a drag compressor, which, at the beginning of each inspiratory ventilation phase, is accelerated to a sufficient speed to deliver the desired inspiratory gas flow, and is subsequently stopped or decelerated to a basal flow level to permit the expiratory ventilation phase to occur. The ventilator device is small and light weight enough to be utilized in portable applications. The ventilator device is power efficient enough to operate for extended periods of time on internal or external batteries. Also provided is an oxygen blending apparatus which utilizes solenoid valves having specific orifice sizes for blending desired amounts of oxygen into the inspiratory gas flow. Also provided is an exhalation valve having an exhalation flow transducer which incorporates a radio frequency data base to provide an attendant controller with specific calibration information for the exhalation flow transducer.Type: ApplicationFiled: August 1, 2008Publication date: April 2, 2009Applicant: BIRD PRODUCTS CORPORATIONInventors: Douglas F. DeVRIES, Michael J. Cegielski, Warner V. Graves, JR., Malcolm R. Williams, Michael B. Holmes
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Patent number: 7222623Abstract: A ventilator device and system comprising a rotating compressor, preferably a drag compressor, which, at the beginning of each inspiratory ventilation phase, is accelerated to a sufficient speed to deliver the desired inspiratory gas flow, and is subsequently stopped or decelerated to a basal flow level to permit the expiratory ventilation phase to occur. The ventilator device is small and light weight enough to be utilized in portable applications. The ventilator device is power efficient enough to operate for extended periods of time on internal or external batteries. Also provided is an oxygen blending apparatus which utilizes solenoid valves having specific orifice sizes for blending desired amounts of oxygen into the inspiratory gas flow. Also provided is an exhalation valve having an exhalation flow transducer which incorporates a radio frequency data base to provide an attendant controller with specific calibration information for the exhalation flow transducer.Type: GrantFiled: December 29, 2004Date of Patent: May 29, 2007Assignee: Birds Products CorporationInventors: Douglas F. DeVries, Michael J. Cegielski, Warner V. Graves, Jr., Malcolm R. Williams, Michael B. Holmes
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Patent number: 6877511Abstract: A ventilator device and system comprising a rotating compressor, preferably a drag compressor, which, at the beginning of each inspiratory ventilation phase, is accelerated to a sufficient speed to deliver the desired inspiratory gas flow, and is subsequently stopped or decelerated to a basal flow level to permit the expiratory ventilation phase to occur. The ventilator device is small and light weight enough to be utilized in portable applications. The ventilator device is power efficient enough to operate for extended periods of time on internal or external batteries. Also provided is an oxygen blending apparatus which utilizes solenoid valves having specific orifice sizes for blending desired amounts of oxygen into the inspiratory gas flow. Also provided is an exhalation valve having an exhalation flow transducer which incorporates a radio frequency data base to provide an attendant controller with specific calibration information for the exhalation flow transducer.Type: GrantFiled: June 10, 2003Date of Patent: April 12, 2005Assignee: Bird Products CorporationInventors: Douglas F. DeVries, Michael J. Cegielski, Warner V. Graves, Jr., Malcolm R. Williams, Michael B. Holmes
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Publication number: 20030230307Abstract: A ventilator device and system comprising a rotating compressor, preferably a drag compressor, which, at the beginning of each inspiratory ventilation phase, is accelerated to a sufficient speed to deliver the desired inspiratory gas flow, and is subsequently stopped or decelerated to a basal flow level to permit the expiratory ventilation phase to occur. The ventilator device is small and light weight enough to be utilized in portable applications. The ventilator device is power efficient enough to operate for extended periods of time on internal or external batteries. Also provided is an oxygen blending apparatus which utilizes solenoid valves having specific orifice sizes for blending desired amounts of oxygen into the inspiratory gas flow. Also provided is an exhalation valve having an exhalation flow transducer which incorporates a radio frequency data base to provide an attendant controller with specific calibration information for the exhalation flow transducer.Type: ApplicationFiled: June 10, 2003Publication date: December 18, 2003Inventors: Douglas F. DeVries, Michael J. Cegielski, Warner V. Graves, Malcolm R. Williams, Michael B. Holmes
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Patent number: 6526970Abstract: A ventilator device and system comprising a rotating compressor, preferably a drag compressor, which, at the beginning of each inspiratory ventilation phase, is accelerated to a sufficient speed to deliver the desired inspiratory gas flow, and is subsequently stopped or decelerated to a basal flow level to permit the expiratory ventilation phase to occur. The ventilator device is small and light weight enough to be utilized in portable applications. The ventilator device is power efficient enough to operate for extended periods of time on internal or external batteries. Also provided is an oxygen blending apparatus which utilizes solenoid valves having specific orifice sizes for blending desired amounts of oxygen into the inspiratory gas flow. Also provided is an exhalation valve having an exhalation flow transducer which incorporates a radio frequency data base to provide an attendant controller with specific calibration information for the exhalation flow transducer.Type: GrantFiled: August 21, 2001Date of Patent: March 4, 2003Inventors: Douglas F. DeVries, Michael J. Cegielski, Warner V. Graves, Jr., Malcolm R. Williams, Michael B. Holmes
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Publication number: 20020005197Abstract: A ventilator device and system comprising a rotating compressor, preferably a drag compressor, which, at the beginning of each inspiratory ventilation phase, is accelerated to a sufficient speed to deliver the desired inspiratory gas flow, and is subsequently stopped or decelerated to a basal flow level to permit the expiratory ventilation phase to occur. The ventilator device is small and light weight enough to be utilized in portable applications. The ventilator device is power efficient enough to operate for extended periods of time on internal or external batteries. Also provided is an oxygen blending apparatus which utilizes solenoid valves having specific orifice sizes for blending desired amounts of oxygen into the inspiratory gas flow. Also provided is an exhalation valve having an exhalation flow transducer which incorporates a radio frequency data base to provide an attendant controller with specific calibration information for the exhalation flow transducer.Type: ApplicationFiled: August 21, 2001Publication date: January 17, 2002Inventors: Douglas F. DeVries, Michael J. Ceqielski, Warner V. Graves, Malcolm R. Williams, Michael B. Holmes