Patents by Inventor Derek Knight

Derek Knight 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).

  • Pressure washer device employing a cool bypass
    Patent number: 8888016
    Abstract: A pressure washer device is provided that employs an unloader bypass valve that directs a selective amount of fluid via a small diameter bypass line back to a water storage tank. The small amount of fluid allows for the pump to remain working and introduces cooler water into a bypass circuit, thereby allowing the thermal relief valve to be omitted. The diameter of the bypass line is of such a diameter to prevent siphonage of the detergent associated with the pressure washer system into the water storage tank as well.
    Type: Grant
    Filed: March 14, 2013
    Date of Patent: November 18, 2014
    Assignee: Karcher North America, Inc.
    Inventors: Paul W. Linton, Derek Knight
  • Pressure washer device employing a cool bypass
    Patent number: 8496188
    Abstract: A pressure washer device is provided that employs an unloader bypass valve that directs a selective amount of fluid via a small diameter bypass line back to a water storage tank. The small amount of fluid allows for the pump to remain working and introduces cooler water into a bypass circuit, thereby allowing the thermal relief valve to be omitted. The diameter of the bypass line is of such a diameter to prevent siphonage of the detergent associated with the pressure washer system into the water storage tank as well.
    Type: Grant
    Filed: June 23, 2010
    Date of Patent: July 30, 2013
    Assignee: Karcher North America, Inc.
    Inventors: Paul W. Linton, Derek Knight
  • Pressure Washer Device Employing a Cool Bypass
    Publication number: 20110315787
    Abstract: A pressure washer device is provided that employs an unloader bypass valve that directs a selective amount of fluid via a small diameter bypass line back to a water storage tank. The small amount of fluid allows for the pump to remain working and introduces cooler water into a bypass circuit, thereby allowing the thermal relief valve to be omitted. The diameter of the bypass line is of such a diameter to prevent siphonage of the detergent associated with the pressure washer system into the water storage tank as well.
    Type: Application
    Filed: June 23, 2010
    Publication date: December 29, 2011
    Applicant: Karcher North America, Inc.
    Inventors: Paul W. Linton, Derek Knight
  • Safety bag
    Patent number: D973345
    Type: Grant
    Filed: December 21, 2020
    Date of Patent: December 27, 2022
    Assignee: HK INDUSTRIAL—SAFE A BLOCK
    Inventor: Steven John Derek Knight