Patents by Inventor Robert G. Dunster

Robert G. Dunster 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).

  • Publication number: 20190308043
    Abstract: A fire suppression agent suitable for suppressing a lithium battery fire includes a bicarbonate powder and exfoliated vermiculite particles blended with the bicarbonate powder.
    Type: Application
    Filed: April 10, 2018
    Publication date: October 10, 2019
    Inventors: Adam Chattaway, Robert G. Dunster
  • Patent number: 10265558
    Abstract: There is provided a valve for controlling the release of fire suppressant from a pressurized container, said valve comprising a diaphragm configured to perforate upon action of a shockwave directed onto the surface of said diaphragm, a pyrotechnic charge arranged and adapted to combust to produce combustion products that form a shockwave directed onto the surface of said diaphragm, and a device encasing said pyrotechnic charge. The device comprises a hollow, elongate channel located over said pyrotechnic charge and directed at the center of said diaphragm so as to focus or direct said combustion products onto the center of said diaphragm. The elongate channel has a length that is at least 1.5 times its smallest width.
    Type: Grant
    Filed: April 15, 2016
    Date of Patent: April 23, 2019
    Assignee: KIDDE GRAVINER LIMITED
    Inventors: Paul D. Smith, Robert G. Dunster
  • Patent number: 9970561
    Abstract: A frangible plug for use in a valve mechanism, the frangible plug including a first section having a first end and an opposing second section having a second end and a cylindrical sidewall extending between the first and second ends. Also including means for applying a force on the cylindrical sidewall of the frangible plug such that the first section fractures from the opposing second section, and wherein the means for applying a force on said cylindrical sidewall extends circumferentially around the outer circumference of the sidewall.
    Type: Grant
    Filed: October 13, 2015
    Date of Patent: May 15, 2018
    Assignee: KIDDE GRAVINER LIMITED
    Inventors: Paul D. Smith, Paul Alan Rennie, Robert G. Dunster
  • Publication number: 20180078804
    Abstract: A fire extinguishing apparatus includes a structure defining a first chamber containing an electrically operable explosive device. The apparatus also has a piezoelectric cell capable of producing an electrical output in response to the impact upon the piezoelectric cell. The apparatus also has a container of nonflammable pressurized fluid in contact with the structure, and a mechanical detection mechanism with a thermal sensor for producing a mechanical force at an established temperature. The mechanical force produced by the mechanical detection mechanism is applied to the piezoelectric cell to produce the electrical output that actuates the electrically operable explosive device.
    Type: Application
    Filed: November 28, 2017
    Publication date: March 22, 2018
    Inventors: Paul D. Smith, Robert G. Dunster, Beth A. Dutson, Paul W. Weller
  • Patent number: 9814917
    Abstract: A method of suppressing a fire includes the steps of dispensing a first inert gas in a suppression area at an initial rate, detecting an undesired temperature in the suppression area, dispensing a second inert gas at a subsequent rate in the suppression area in response to the undesired temperature and displacing a volume from the suppression area with the inert gas to achieve a temperature below the undesired temperature.
    Type: Grant
    Filed: April 22, 2014
    Date of Patent: November 14, 2017
    Assignee: KIDDE TECHNOLOGIES, INC.
    Inventors: Josephine Gabrielle Gatsonides, Robert G. Dunster
  • Patent number: 9524841
    Abstract: A temperature sensing system comprises a conductive tube, a shape memory alloy (SMA) element, and a detector. The SMA element is disposed to create an electrical contact with the electrical tube when subjected to at least a critical temperature, and the detector is configured to identify an alarm condition when the conductive tube and the SMA element form a closed electrical circuit.
    Type: Grant
    Filed: December 20, 2013
    Date of Patent: December 20, 2016
    Assignee: Kidde Technologies, Inc.
    Inventors: Paul Rennie, Beth A. Dutson, Paul D. Smith, Robert G. Dunster
  • Publication number: 20160303409
    Abstract: There is provided a valve for controlling the release of fire suppressant from a pressurised container, said valve comprising a diaphragm configured to perforate upon action of a shockwave directed onto the surface of said diaphragm, a pyrotechnic charge arranged and adapted to combust to produce combustion products that form a shockwave directed onto the surface of said diaphragm, and a device encasing said pyrotechnic charge. The device comprises a hollow, elongate channel located over said pyrotechnic charge and directed at the centre of said diaphragm so as to focus or direct said combustion products onto the centre of said diaphragm. The elongate channel has a length that is at least 1.5 times its smallest width.
    Type: Application
    Filed: April 15, 2016
    Publication date: October 20, 2016
    Inventors: Paul D. Smith, Robert G. Dunster
  • Patent number: 9463341
    Abstract: An automatic fire extinguishing system includes a canister having a central axis, an outlet port disposed on the canister, a dip tube disposed in the canister about the central axis and in partial fluid communication with the canister and coupled to the outlet port, a propellant gas mixture of CO2 and N2 disposed within the canister and a gaseous fire suppression agent disposed in the canister.
    Type: Grant
    Filed: October 25, 2011
    Date of Patent: October 11, 2016
    Assignee: KIDDE TECHNOLOGIES, INC.
    Inventors: Robert G. Dunster, Paul W. Weller, Robert Pallant, Francis T. Clarence, John W. Porterfield, Jr., Daniel R. MacLachlan
  • Publication number: 20160102774
    Abstract: A frangible plug for use in a valve mechanism, the frangible plug including a first section having a first end and an opposing second section having a second end and a cylindrical sidewall extending between the first and second ends. Also including means for applying a force on the cylindrical sidewall of the frangible plug such that the first section fractures from the opposing second section, and wherein the means for applying a force on said cylindrical sidewall extends circumferentially around the outer circumference of the sidewall.
    Type: Application
    Filed: October 13, 2015
    Publication date: April 14, 2016
    Inventors: Paul D. SMITH, Paul Alan RENNIE, Robert G. DUNSTER
  • Patent number: 9308406
    Abstract: An automatic fire extinguishing system includes a canister having a central axis, an outlet port disposed on the canister, a dip tube disposed in the canister about the central axis and in partial fluid communication with the canister and coupled to the outlet port, a propellant gas mixture disposed within the canister; and a gaseous fire suppression agent disposed in the canister, wherein a diameter of the outlet port is sized relative to a pressure of the propellant gas mixture.
    Type: Grant
    Filed: October 25, 2011
    Date of Patent: April 12, 2016
    Assignee: KIDDE TECHNOLOGIES, INC.
    Inventors: Robert G. Dunster, Paul W. Weller, Robert Pallant, Francis T. Clarence, John W. Porterfield, Jr., Daniel R. MacLachlan
  • Patent number: 9302128
    Abstract: An automatic fire extinguishing system includes a canister having a central axis, an outlet port disposed on the canister, a dip tube having dip tube side holes and inlet openings, and disposed in the canister about the central axis and in partial fluid communication with the canister and coupled to the outlet port, a propellant gas mixture disposed within the canister and a gaseous fire suppression agent disposed in the canister.
    Type: Grant
    Filed: October 25, 2011
    Date of Patent: April 5, 2016
    Assignee: KIDDE TECHNOLOGIES, INC.
    Inventors: Robert G. Dunster, Paul W. Weller, Robert Pallant, Francis T. Clarence, John W. Porterfield, Jr., Daniel R. MacLachlan
  • Patent number: 9261200
    Abstract: A valve mechanism is herein described that utilizes a frangible plug. The valve mechanism comprises a valve body having an inlet port and an outlet port and a passageway extending therebetween. The valve mechanism comprises a frangible plug that is held within the valve body to block the passageway when the plug is intact. The plug comprises a predefined fracture plane and is configured to fracture across the predefined fracture plane upon application of an impact force.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: February 16, 2016
    Assignee: KIDDE TECHNOLOGIES, INC.
    Inventors: Paul D. Smith, Paul Rennie, Robert G. Dunster, Paul W. Weller, Francis T. Clarence, Joseph Peoples
  • Patent number: 9192798
    Abstract: An automatic fire extinguishing system includes a canister having a central axis, an outlet port disposed on the canister, a dip tube disposed in the canister about the central axis and in partial fluid communication with the canister and coupled to the outlet port, a propellant gas mixture disposed within the canister, a gaseous fire suppression agent disposed in the canister and a dry powder fire suppression agent disposed in the canister.
    Type: Grant
    Filed: October 25, 2011
    Date of Patent: November 24, 2015
    Assignee: KIDDE TECHNOLOGIES, INC.
    Inventors: Robert G. Dunster, Paul W. Weller, Robert Pallant, Francis T. Clarence, John W. Porterfield, Jr., Daniel R. MacLachlan
  • Patent number: 9033061
    Abstract: A fire suppression system includes a high pressure inert gas source that is configured to provide a first inert gas output and a low pressure inert gas source that is configured to provide a second inert gas output. A distribution network is connected with the high and low pressure inert gas sources to distribute the first and second inert gas outputs. A controller is operatively connected with at least the distribution network to control how the respective first and second inert gas outputs are distributed.
    Type: Grant
    Filed: May 22, 2009
    Date of Patent: May 19, 2015
    Assignee: Kidde Technologies, Inc.
    Inventors: Adam Chattaway, Josephine Gabrielle Gatsonides, Robert G. Dunster, Terry Simpson, Dharmendr Len. Seebaluck, Robert E. Glaser
  • Patent number: 9016392
    Abstract: A two-phase liquid/inert gas flow inerting fire suppression system is provided having improved liquid fire suppressant distribution within the inert gas flow. The system includes a flow distribution network having a first pipe interconnected with a second pipe at a flow splitting tee. A liquid flow redistribution device is disposed in the first pipe upstream with respect to fluid flow of the flow splitting tee.
    Type: Grant
    Filed: April 10, 2008
    Date of Patent: April 28, 2015
    Assignee: UTC Fire & Security Corporation
    Inventors: Yehia F. Khalil, Muhidin A. Lelic, Giuliano Amantini, Ravi K. Madabhushi, Marios C. Soteriou, May L. Corn, Robert G. Dunster, Rob J. Lade
  • Patent number: 8915307
    Abstract: A nozzle for a fire suppression system has a bonnet and a deflector base. An inlet port extends through the bonnet along the axis of symmetry of the bonnet. The inlet port receives an outlet end of a fire suppression delivery pipe to mount the bonnet to the pipe. The bonnet has a frustoconical surface which extends radially outward and downward from the inlet port. The deflector base is secured to and co-axially aligned with the bonnet at a predetermined distance to create a flow passageway therebetween. The flow passageway imparts a down angle to a suppressant flow discharging from the nozzle to better disperse the suppressant within the fire zone. A discharge port at the circumferential edge of the bonnet and deflector base constricts the suppressant flow to atomize the droplets of liquid suppressant discharged into the fire zone.
    Type: Grant
    Filed: December 18, 2008
    Date of Patent: December 23, 2014
    Assignee: UTC Fire & Security Corporation
    Inventors: Muhidin Lelic, Giuliano Amantini, May L. Corn, Robert G. Dunster, Rob J. Lade, Ravi K. Madabhushi, Seth Sienkiewicz, Marios C. Soteriou
  • Publication number: 20140367126
    Abstract: A method of suppressing a fire includes the steps of dispensing a first inert gas in a suppression area at an initial rate, detecting an undesired temperature in the suppression area, dispensing a second inert gas at a subsequent rate in the suppression area in response to the undesired temperature and displacing a volume from the suppression area with the inert gas to achieve a temperature below the undesired temperature.
    Type: Application
    Filed: April 22, 2014
    Publication date: December 18, 2014
    Applicant: KIDDE TECHNOLOGIES, INC.
    Inventors: Josephine Gabrielle Gatsonides, Robert G. Dunster
  • Patent number: 8814130
    Abstract: A self-regulating valve controls the flow of high pressure gas discharging from a gas cylinder in a fire suppression system in response to a detection of a fire within a protected space by a two-step process which reduces the pressure rise within the protected space upon release of the fire suppression gas into the protected space.
    Type: Grant
    Filed: December 29, 2008
    Date of Patent: August 26, 2014
    Assignee: UTC Fire & Security Corporation
    Inventors: Muhidin A. Lelic, Fanping Sun, Zaffir A. Chaudhry, Tony George, Lyle H. Hamilton, Robert G. Dunster, Rob J. Lade, Paul C. Upton, Mark Williamson
  • Patent number: 8813858
    Abstract: A fire suppression system is disclosed that includes a suppressant source system configured to hold fire suppressant. In one example, the fire suppressant is an inert gas. A temperature sensor is arranged in a suppression area and is configured to detect an undesired temperature or temperature increase in the suppression area. A suppression system is in communication with the temperature sensor and in fluid communication with the suppressant source system. The suppression system is configured to selectively release the fire suppressant to the suppression area at initial and subsequent rates. The initial rate is greater than the subsequent rate. The subsequent rate is configured to displace a volume from the suppression area through the leakage system in response to the undesired temperature.
    Type: Grant
    Filed: March 18, 2010
    Date of Patent: August 26, 2014
    Assignee: Kidde Technologies, Inc.
    Inventors: Josephine Gabrielle Gatsonides, Robert G. Dunster
  • Publication number: 20140177675
    Abstract: A temperature sensing system comprises a conductive tube, a shape memory alloy (SMA) element, and a detector. The SMA element is disposed to create an electrical contact with the electrical tube when subjected to at least a critical temperature, and the detector is configured to identify an alarm condition when the conductive tube and the SMA element form a closed electrical circuit.
    Type: Application
    Filed: December 20, 2013
    Publication date: June 26, 2014
    Applicant: Kidde Technologies, Inc.
    Inventors: Paul Rennie, Beth A. Dutson, Paul D. Smith, Robert G. Dunster