Patents by Inventor Duane J. Brinkerhoff

Duane J. Brinkerhoff 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).

  • Fire fighting nozzle and method including pressure regulation, chemical and eduction features
    Patent number: 8002203
    Abstract: A fire fighting nozzle for extinguishing industrial scale fires including improved automatic pressure regulating features, enhanced educting features including central and peripheral channeling for foam concentrate, and combining with a capacity to throw dry chemical. Improved pressure regulating features include a double acting baffle and preferably a relief valve. Method and apparatus for automatically metering an additive such as foam concentrate into a conduit having a variably flowing fire fighting fluid therethrough, the conduit including a discharge device, proximate or downstream.
    Type: Grant
    Filed: December 2, 2005
    Date of Patent: August 23, 2011
    Inventors: Dennis W. Crabtree, Duane J. Brinkerhoff, Dwight P. Williams
  • System for automatic self-proportioning of foam concentrate into fire fighting fluid variable flow conduit
    Patent number: 7140552
    Abstract: A fire fighting nozzle for extinguishing industrial scale fires including improved automatic pressure regulating features, enhanced educting features including central and peripheral channeling for foam concentrate, and combining with a capacity to throw dry chemical. Improved pressure regulating features include a double acting baffle and preferably a relief valve. Method and apparatus for automatically metering an additive such as foam concentrate into a conduit having a variably flowing fire fighting fluid therethrough, the conduit including a discharge device, proximate or downstream.
    Type: Grant
    Filed: June 14, 2000
    Date of Patent: November 28, 2006
    Assignee: Williams Fire & Hazard Control, Inc.
    Inventors: Dennis W. Crabtree, Duane J. Brinkerhoff, Dwight P. Williams
  • Self metering foam proportioning system
    Patent number: 6659187
    Abstract: A fire fighting fluid proportioning system and method including a fire fighting fluid conduit in fluid communication with a fire fighting fluid regulating valve and a venturi, the venturi in fluid communication with a valve source of fire fighting foam concentrate, and having a pilot valve connected directly or indirectly to the regulating valve and the concentrate source valve and adapted to adjust, directly or indirectly, the regulating valve and the source valve in response to a sensed indicia of fire fighting fluid pressure in the conduit.
    Type: Grant
    Filed: August 25, 2000
    Date of Patent: December 9, 2003
    Assignee: Williams Fire & Hazard Control, Inc
    Inventors: Dennis W. Crabtree, Duane J. Brinkerhoff, Eric LaVergne