Patents by Inventor Colin Gradwell

Colin Gradwell 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).

  • PLATFORM SCREEN DOOR
    Publication number: 20120120234
    Abstract: A platform screen door system, comprising a fixed panel, a door leaf slidably disposed adjacent to the fixed panel, a drive means adapted to slidingly move the door leaf from a door open position to a door closed position; and a microprocessor adapted to control the movement of the drive means and, thereby, control the movement of the door leaf The system also includes a media panel, disposed on the fixed panel, wherein the media panel is adapted to display information.
    Type: Application
    Filed: September 18, 2007
    Publication date: May 17, 2012
    Applicant: Knorr Bremse Rail Systems (UK)Limited
    Inventors: Colin Fullalove, Colin Gradwell, Ross Bradley, Nick Bradley
  • Pressure equalisation device
    Patent number: 8105408
    Abstract: A pressure equalization device adapted to be operatively connected to an enclosure, the device including an air passage which, when the device is so connected to the enclosure, provides a fluid communication between the interior of the enclosure and atmosphere, the air passage containing a barrier wall comprising an air permeable membrane forming a micro-particulate filter.
    Type: Grant
    Filed: October 15, 2010
    Date of Patent: January 31, 2012
    Assignee: Knorr-Bremse Rail Systems (UK) Ltd.
    Inventors: Alan Thomas, Colin Gradwell, Mark Hemmings
  • Seal arrangement for a piston valve
    Patent number: 7384022
    Abstract: A sliding seal arrangement in particular for a valve having an anodised aluminium coating in contact with the seal. The coating is produced so that inclusions in the surface of the coating are substantially aligned. The direction of motion of the sliding seal in use is then substantially aligned with the direction of the inclusions resulting in greatly reduced wear on the seal.
    Type: Grant
    Filed: June 16, 2004
    Date of Patent: June 10, 2008
    Assignee: Knorr-Bremse Rail Systems (UK) Ltd.
    Inventor: Colin Gradwell
  • Pressure equalisation device
    Publication number: 20070125231
    Abstract: A pressure equalisation device adapted to be operatively connected to an enclosure, the device including an air passage which, when the device is so connected to the enclosure, provides a fluid communication between the interior of the enclosure and atmosphere, the air passage containing a barrier wall comprising an air permeable membrane forming a micro-particulate filter.
    Type: Application
    Filed: May 10, 2004
    Publication date: June 7, 2007
    Inventors: Alan Thomas, Colin Gradwell, Mark Hemmings