Patents by Inventor Roger David Larke

Roger David 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).

  • Electrically insulating rail pad
    Patent number: 6648238
    Abstract: A rail pad (1), for electrically isolating a railway rail (2), comprises a rail seat portion (11) for supporting a foot of the rail (2), a pair of upstands (12) joined to opposite edges of the rail seat portion (11) of the pad (1) by respective webs such that respective channels (13) for directing water away from the rail are defined between the rail seat portion (11) of the pad (1) and each adjacent upstand (12). Such a pad provides improved wet electrical resistance.
    Type: Grant
    Filed: March 12, 2001
    Date of Patent: November 18, 2003
    Assignee: Pandrol Limited
    Inventor: Roger David Larke
  • Electrically insulating rail pad
    Publication number: 20010023898
    Abstract: A rail pad (1), for electrically isolating a railway rail (2), comprises a rail seat portion (11) for supporting a foot of the rail (2), a pair of upstands (12) joined to opposite edges of the rail seat portion (11) of the pad (1) by respective webs such that respective channels (13) for directing water away from the rail are defined between the rail seat portion (11) of the pad (1) and each adjacent upstand (12). Such a pad provides improved wet electrical resistance.
    Type: Application
    Filed: March 12, 2001
    Publication date: September 27, 2001
    Applicant: Pandrol Limited
    Inventor: Roger David Larke