Patents by Inventor Roger D. Larke

Roger D. Larke 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).

  • Patent number: 5735458
    Abstract: A railway rail anchoring device, for use with a railway rail-fastening clip which is approximately M-shaped in plan and has first and second leg portions and a rail-bearing portion, comprises a base member and first and second clip-retaining members connected together by the base member such that the first clip-retaining member is spaced apart from the second clip-retaining member so as to define between the first and second clip-retaining members an opening for receiving the rail-bearing portion of such a clip.
    Type: Grant
    Filed: August 30, 1996
    Date of Patent: April 7, 1998
    Assignee: Pandrol Limited
    Inventors: Trevor P. Brown, Brian G. Conroy, Stephen J. Cox, Christopher Gardner, Roger D. Larke, Barry Marshall, Jan Svendsen
  • Patent number: 5566882
    Abstract: A railway rail fastening clip (1) suitable for holding down a railway rail (2) is formed from a rod of resilient material bent so as to be approximately M-shaped in plan, the clip (1) being such that, when it is bearing on the flange of a rail (2), the longitudinal axis of a part (14) thereof, which interconnects inner legs (13, 15) of the M, lies in a reference plane which is substantially parallel, but not identical, to a plane containing the longitudinal axes of outer legs (11, 17) of the M. Such clips (1) are used with an anchoring device (5), which, as the clip (1) is installed therein, deflects the outer legs (11, 17) downwardly with respect to the inner legs (13, 15), so as to place the clip under stress.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: October 22, 1996
    Assignee: Pandrol Limited
    Inventors: Trevor P. Brown, Brian G. Conroy, Stephen J. Cox, Christopher Gardner, Roger D. Larke, Barry Marshall, Jan Svendsen
  • Patent number: 5520330
    Abstract: A railway rail fastening clip (1) suitable for holding down a railway rail (2) is formed from a rod of resilient material bent so as to be approximately M-shaped in plan, the clip (1) being such that, when it is bearing on the flange of a rail (2), the longitudinal axis of a part (14) thereof, which interconnects inner legs (13, 15) of the M, lies in a reference plane which is substantially parallel, but not identical, to a plane containing the longitudinal axes of outer legs (11, 17) of the M. Such clips (1) are used with an anchoring device (5), which, as the clip (1) is installed therein, deflects the outer legs (11, 17) downwardly with respect to the inner legs (13, 15), so as to place the clip under stress.
    Type: Grant
    Filed: August 11, 1994
    Date of Patent: May 28, 1996
    Assignee: Pandrol Limited
    Inventors: Trevor P. Brown, Brian G. Conroy, Stephen J. Cox, Christopher Gardner, Roger D. Larke, Barry Marshall, Jan Svendsen