Patents by Inventor Keith William Langley

Keith William Langley 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).

  • Movable thresholds and railway platform barrier doors
    Patent number: 5845579
    Abstract: Thresholds for bridging the gap between a platform and doorways of vehicles stopped at the platform. The thresholds are adapted to move from a retracted position to an extended position in response to the opening of barrier doors mounted alongside the platform.
    Type: Grant
    Filed: July 15, 1996
    Date of Patent: December 8, 1998
    Assignee: Westinghouse Brake and Signal Holdings Limited
    Inventors: Keith William Langley, Russell Clinton Harding, Derek Tate, Mark Andrew John Hemmings
  • Spring-force applying means
    Patent number: 4080876
    Abstract: A spring brake actuator is proposed which is provided with an arrangement accessible from the outside for manually releasing the brake in the absence of fluid pressure to release it, the releasing arrangement comprising a member which rotates a splined force applying member relative to a force transmitting member against the force of a return spring which holds abutting ends of the splines of the elements mutually aligned.
    Type: Grant
    Filed: December 10, 1976
    Date of Patent: March 28, 1978
    Assignee: Westinghouse Brake & Signal Co. Ltd.
    Inventors: Philip Alan Sturgess, Keith William Langley