Patents by Inventor Edwin B. Merrick
Edwin B. Merrick 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: 7886611Abstract: A system is disclosed for detecting an electrical sensor, the system includes a sensor signal processing circuit further comprising an input port to receive a connector including the output signal lines of the sensor, a resistor connected to the output signal line of said input port, wherein the resistor is connected to a predetermined voltage; a sensor circuit having a connector adapted to connect to the connector, wherein the sensor circuit has a resistance substantially less than the pull-resistor, and the sensor signal processing circuit detects an unconnected sensor based on the voltage applied by the resistor.Type: GrantFiled: January 15, 2010Date of Patent: February 15, 2011Assignee: CHF Solutions Inc.Inventors: John J. O'Mahony, Mark Gelfand, Edwin B. Merrick, Jayne B. Merrick, legal representative
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Publication number: 20100175483Abstract: A system is disclosed for detecting an electrical sensor, the system includes a sensor signal processing circuit further comprising an input port to receive a connector including the output signal lines of the sensor, a resistor connected to the output signal line of said input port, wherein the resistor is connected to a predetermined voltage; a sensor circuit having a connector adapted to connect to the connector, wherein the sensor circuit has a resistance substantially less than the pull-resistor, and the sensor signal processing circuit detects an unconnected sensor based on the voltage applied by the resistor.Type: ApplicationFiled: January 15, 2010Publication date: July 15, 2010Applicant: CHF SOLUTIONS INC.Inventors: John J. O'Mahony, Mark Gelfand, Edwin B. Merrick, Jayne B. Merrick
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Patent number: 7671974Abstract: A optical sensor for measuring tranmissive properties of a solution having: a cuvette body with an enclosed flow passage for the solution, wherein the flow passage further includes a solution inlet and a solution outlet and a cuvette between the inlet and outlet; a light source projecting light of a predetermined wavelength through the cuvette and solution flowing through the cuvette and to a light sensor, wherein the cuvette has inner wall surfaces opaque to the light of said predetermined wavelength, and the inner wall is in contact with the solution.Type: GrantFiled: October 29, 2004Date of Patent: March 2, 2010Assignee: CHF Solutions Inc.Inventors: John J. O'Mahony, Xinrui Hou, Edwin B. Merrick
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Patent number: 7647834Abstract: A system is disclosed for detecting an electrical sensor, the system includes a sensor signal processing circuit further comprising an input port to receive a connector including the output signal lines of the sensor, a resistor connected to the output signal line of said input port, wherein the resistor is connected to a predetermined voltage; a sensor circuit having a connector adapted to connect to the connector, wherein the sensor circuit has a resistance substantially less than the pull-resistor, and the sensor signal processing circuit detects an unconnected sensor based on the voltage applied by the resistor.Type: GrantFiled: August 1, 2005Date of Patent: January 19, 2010Assignee: CHF Solutions Inc.Inventors: John J. O'Mahony, Mark Gelfand, Edwin B. Merrick, Jayne B. Merrick, legal representative
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Patent number: 7230687Abstract: A blood leak detector is disclosed having a light source projecting a beam along an optical path, wherein the beam has a wavelength in a range of about 800 to 930 nm; a light detector receiving the beam through an aperture having a diameter in a range of 30 to 60 thousands of an inch; and a housing to receive a tubular liquid passage between the light source and light detector, the housing having a slot transverse to the optical path to receive the tubular liquid passage and the slot has a width narrower than the tubular liquid passage when uncompressed.Type: GrantFiled: September 2, 2005Date of Patent: June 12, 2007Assignee: CHF Solutions Inc.Inventors: John J. O'Mahony, Edwin B. Merrick, Sonny Behan
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Patent number: 6947131Abstract: A blood leak detector is disclosed having a light source projecting a beam along an optical path, wherein the beam has a wavelength in a range of about 800 nm to 930 nm; a light detector receiving the beam; a housing with a slot to receive a transparent tube between the light source and light detector and aligned with the optical path.Type: GrantFiled: February 19, 2003Date of Patent: September 20, 2005Assignee: CHF Solutions, Inc.Inventors: John J. O'Mahony, Edwin B. Merrick, Sonny Behan
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Publication number: 20030210390Abstract: A blood leak detector is disclosed having a light source projecting a beam along an optical path, wherein the beam has a wavelength in a range of about 800 nm to 930 nm; a light detector receiving the beam; a housing with a slot to receive a transparent tube between the light source and light detector and aligned with the optical path.Type: ApplicationFiled: February 19, 2003Publication date: November 13, 2003Inventors: John J. O'Mahony, Edwin B. Merrick, Sonny Behan
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Patent number: 6467478Abstract: 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: GrantFiled: February 2, 2000Date of Patent: October 22, 2002Inventors: Edwin B. Merrick, Glen N. Gee, John O'Mahony, John O'Dea
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Patent number: 6298255Abstract: A sensor system which includes a biopotential signal monitor, a smart sensor and the accompanying hardware and software interface which authenticates the source and validity of the smart sensor and also verifies that the smart sensor meets various criteria for use.Type: GrantFiled: June 9, 1999Date of Patent: October 2, 2001Assignee: Aspect Medical Systems, Inc.Inventors: Rafael M. Cordero, Philip H. Devlin, Nassib G. Chamoun, John R. Shambroom, Edwin B. Merrick, Joao Melo
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Patent number: 6116240Abstract: 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: GrantFiled: March 26, 1999Date of Patent: September 12, 2000Assignee: Purtian-Bennett CorporationInventors: Edwin B. Merrick, Glen N. Gee, John O'Mahony, John O'Dea
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Patent number: 5934274Abstract: 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: GrantFiled: June 18, 1997Date of Patent: August 10, 1999Assignee: Puritan-Bennett CorporationInventors: Edwin B. Merrick, Glen N. Gee, John O'Mahony, John O'Dea
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Patent number: 5664560Abstract: 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: GrantFiled: July 31, 1996Date of Patent: September 9, 1997Assignee: Puritan-Bennett CorporationInventors: Edwin B. Merrick, Glen N. Gee, John O'Mahony, John O'Dea
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Patent number: 5531221Abstract: 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: GrantFiled: September 12, 1994Date of Patent: July 2, 1996Assignee: Puritan Bennett CorporationInventors: John S. Power, John J. O'Mahony, Edwin B. Merrick
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Patent number: 5357953Abstract: A calibration method and apparatus capable of being calibrated according to the method that allows a remote sensor to be transferred from analyzing instrument to analyzing instrument within a group of analyzing instruments without the need to recalibrate. The device includes a separate memory capability associated with the sensor as well as each instrument while the method requires the use of an arbitrarily selected sensor to initially be transferred from instrument to instrument, while being subjected to the same calibration standards in order to generate calibration data for entry into each instrument's memory. With such data entered in the instruments' memories, any remote sensor, calibrated on any one instrument and having such calibration data stored in its own memory, can then readily be interconnected to any instrument of the group to immediately yield accurate results.Type: GrantFiled: May 21, 1992Date of Patent: October 25, 1994Assignee: Puritan-Bennett CorporationInventors: Edwin B. Merrick, Amal Jeryes, Neal B. Dowling, Jr., Yuan Young, Larry Powell
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Patent number: 5348005Abstract: A method and system for simulating living tissue which is to be monitored by a pulse oximeter that provides red and infrared light flashes, the system including structure for: converting the red and infrared light flashes of the pulse oximeter into electrical signals; modulating the converted electrical signals to provide modulated electrical signals; and converting the modulated electrical signals to light flashes and transmitting the converted light flashes to the pulse oximeter for detection so that the pulse oximeter responds to the converted light flashes as it would to light flashes modulated by a living tissue.Type: GrantFiled: May 7, 1993Date of Patent: September 20, 1994Assignee: Bio-Tek Instruments, Inc.Inventors: Edwin B. Merrick, Peter Haas
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Patent number: 4883055Abstract: An artificially induced blood pulse used for measuring oxygen saturation in arterial blood is produced by a cuff, wrapped around a body member having an artery upstream from a testing site, when a squeezing pulse is applied by the cuff to the body member.Type: GrantFiled: March 11, 1988Date of Patent: November 28, 1989Assignee: Puritan-Bennett CorporationInventor: Edwin B. Merrick
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Patent number: 4883353Abstract: A pulse oximeter having a sensor responsive to light transmitted through an area of blood flow which is optically absorbed by hemoglobin for producing a pulsatile waveform indicating the current pulsatile component of blood flow. A process waveform is created for tracking the process of the oximeter during its determination of a maximum and a minimum value of the pulsatile waveform, which is used for calculating the saturation of oxygen.Type: GrantFiled: February 11, 1988Date of Patent: November 28, 1989Assignee: Puritan-Bennett CorporationInventors: Kenneth A. Hausman, Edwin B. Merrick
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Patent number: 4854326Abstract: A catheter for use in apparatus for deriving a signal corresponding to the blood pressure of a patient, said catheter comprising means defining a lumen in said catheter, a transducer mounted at a distal end of said lumen, and a compliance means in said lumen.Type: GrantFiled: December 22, 1988Date of Patent: August 8, 1989Assignee: Hewlett-Packard CompanyInventor: Edwin B. Merrick
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Patent number: 4800749Abstract: A calibration circuit in which low valued resistors are respectively connected in series with transducer outputs and switching means are provided for connecting resistors in the circuit so as to produce a voltage across the low valued resistor that corresponds to a given value of a phenomenon applied to the transducer.Type: GrantFiled: August 15, 1986Date of Patent: January 31, 1989Assignee: Hewlett-Packard CompanyInventor: Edwin B. Merrick
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Patent number: RE39268Abstract: A method and system for simulating living tissue which is to be monitored by a pulse oximeter that provides red and infrared light flashes, the system including structure for: converting the red and infrared light flashes of the pulse oximeter into electrical signals; modulating the converted electrical signals to provide modulated electrical signals; and converting the modulated electrical signals to light flashes and transmitting the converted light flashes to the pulse oximeter for detection so that the pulse oximeter responds to the converted light flashes as it would to light flashes modulated by a living tissue.Type: GrantFiled: May 25, 2004Date of Patent: September 5, 2006Assignee: Fluke Electronics Corp.Inventors: Edwin B. Merrick, Kay Haas, John Tobey Clark, Michael William Lane, Peter Haas