Patents by Inventor Geoffrey G. Leeves

Geoffrey G. Leeves 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).

  • Rail pads
    Patent number: 5195679
    Abstract: A rail pad comprises a membrane (3) from opposite faces of which there project protrusions (4, 5), which may be ribs, possibly extending along the pad, perhaps over its whole length, or studs. The protrusions are such that no line perpendicular to the membrane passes through more than one of the protrusions. The pad is such that it is stiffer on one side than the other, for example because the ratio between the total area of protruding material and the total area of membrane free of protrusions is greater at the stiffer side of the pad than the other. The pad is preferably made of thermoplastic copolyester elastomer.
    Type: Grant
    Filed: July 6, 1992
    Date of Patent: March 23, 1993
    Assignee: Pandrol Limited
    Inventors: Geoffrey G. Leeves, Paul A. Abraham
  • Rail pads and rail assemblies including such pads
    Patent number: 4771944
    Abstract: The invention provides an elastomeric rail pad of generally rectangular plan configuration, the pad having an upper face adapted to underly the lower face of a rail, and a lower face adapted to overly a rail foundation member, wherein each of the upper and the lower faces of the pad is provided with a multiplicity of distinct and separate portions, when separately viewed from adjacent side edges of the rectangular pad, raised above the base level of the respective face and adapted to engage the rail or the foundation member respectively, the arrangement being such that between approximately 30% and 70% of that part of each face of the pad which is arranged to lie directly between the rail and the foundation member is constituted by the raised surface portions.
    Type: Grant
    Filed: February 19, 1987
    Date of Patent: September 20, 1988
    Assignee: Pandrol Limited
    Inventors: Derek Brister, Edward Whittome, David Rhodes, Geoffrey G. Leeves
  • Electrically insulating device for use on a railway track under and beside the foot of a rail
    Patent number: 4757945
    Abstract: A device to be placed on a railway sleeper (1) or some other foundation for a railway rail (3) includes a pad (2) and two upstanding portions (6A). The pad (2) is of resilient and electrically insulating material and the upstanding portions (6A) are of stiffer electrically insulating material. At least two-thirds of the area of the pad (2) has none of the stiffer material above or below it. Preferably the upstanding portions (6A) are at least 150 mm. long and are on elongate members (6) which have ears (6B) at opposite ends which extend under only corners of the pad (2), where they are secured by spigots (2E) projecting into holes (6C).
    Type: Grant
    Filed: January 27, 1987
    Date of Patent: July 19, 1988
    Assignee: Pandrol Limited
    Inventor: Geoffrey G. Leeves