Patents by Inventor Dan McKenzie

Dan McKenzie 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).

  • Liquid proportioning system
    Publication number: 20070002679
    Abstract: A liquid proportioning system controls the mixing of water and a fire retardant concentrate through the operation of a diaphragm operated valve. The diaphragm valve controls the flow rate of concentrate in response to the sensed pressure of water supplied to a proportioner, so that a predetermined proportion of concentrate and water is maintained.
    Type: Application
    Filed: July 1, 2005
    Publication date: January 4, 2007
    Inventors: Vinayak Sharma, Michael Long, Charles George, Dan McKenzie
  • Third rail collection assembly and beam therefor
    Patent number: 5454456
    Abstract: The present invention is a third rail assembly that includes a beam made of synthetic material which will not crack upon exposure to the elements so that conductive material such as water, grease, or the like will not settle in the cracks. Also, the beam is lightweight for ease of installation and very strong so that the beam will not be destroyed when the third rail collector encounters an obstacle.
    Type: Grant
    Filed: June 23, 1994
    Date of Patent: October 3, 1995
    Inventor: Dan McKenzie