Patents by Inventor Robert John Hamilton

Robert John Hamilton 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: 11248349
    Abstract: A pad for a railway rail fastening assembly, the pad being configured for placement between a rail and an underlying foundation, such as slab track or a sleeper, wherein a cross-section of the pad comprises: a second resilient layer configured to face a railway rail; an intermediate rigid layer; and a first resilient layer configured to face an underlying foundation. The rigid layer is provided between and is integrally formed with the first and second resilient layers. An edge of the pad comprises at least one ear that extends beyond a central region of the pad, the rigid layer extending into the ear with the ear being configured to resist rail roll.
    Type: Grant
    Filed: April 12, 2017
    Date of Patent: February 15, 2022
    Assignee: Pandrol Limited
    Inventors: Stephen John Cox, Robert John Hamilton
  • Publication number: 20190203424
    Abstract: A pad for a railway rail fastening assembly, the pad being configured for placement between a rail and an underlying foundation, such as slab track or a sleeper, wherein a cross-section of the pad comprises: a second resilient layer configured to face a railway rail; an intermediate rigid layer; and a first resilient layer configured to face an underlying foundation. The rigid layer is provided between and is integrally formed with the first and second resilient layers. An edge of the pad comprises at least one ear that extends beyond a central region of the pad, the rigid layer extending into the ear with the ear being configured to resist rail roll.
    Type: Application
    Filed: April 12, 2017
    Publication date: July 4, 2019
    Applicant: Pandrol Limited
    Inventors: Stephen John Cox, Robert John Hamilton
  • Patent number: 8905322
    Abstract: A railway rail pad (1), for use beneath a railway rail in a rail fastening assembly as cushioning and/or electrical insulation, has first and second major faces (2, 3), the first face (2) having a rail seat portion (20) on which a foot of a railway rail sits when the pad (1) is in use, and side members (4A, 4B) attached to and extending from two opposite edges of the first face (2) of the pad (1). The side members (4A, 4B) are arranged so as to be located on respective opposite sides of the railway rail when the pad (1) is in use such that the rail seat portion (20) of the pad (1) lies between respective inwardly-facing wall faces (41A, 41B) of the said side members (4A, 4B).
    Type: Grant
    Filed: August 13, 2010
    Date of Patent: December 9, 2014
    Assignee: Pandrol Limited
    Inventors: Stephen John Cox, Robert John Hamilton, Christopher Gardner
  • Patent number: 8888012
    Abstract: An electrical insulator for use with a rail fastening clip comprises a contact member providing on one side a substantially flat rail contact surface for contacting a foot of a rail and on the opposing side a clip contact surface for contacting a rail bearing surface of a bearing portion of the clip, the insulator also having retaining means for retaining the insulator on the clip in such a way as to allow rotation of the insulator about a longitudinal axis of the bearing portion of the clip. The insulator has stop portions for limiting such rotation about the longitudinal axis of the bearing portion of the clip to a desired extent. The clip contact surface of the insulator is convex, in a vertical plane which is perpendicular to the longitudinal axis of the bearing portion of the clip, such that, when the insulator is attached to a clip having a flat rail bearing surface, a contact region between the flat rail bearing surface of the clip and the clip contact surface of the insulator is linear.
    Type: Grant
    Filed: August 13, 2010
    Date of Patent: November 18, 2014
    Assignee: Pandrol Limited
    Inventors: Stephen John Cox, Robert John Hamilton, Christopher Gardner
  • Patent number: 8286891
    Abstract: A component for use in a rail fastening assembly, the assembly comprising a railway rail fastening clip having a first part for bearing on a railway rail and a railway rail clip anchoring device for retaining the railway rail clip, comprises a first portion adapted to receive a lateral load from the rail when located between a substantially upright face of the rail clip anchoring device and the side of the foot of an adjacent railway rail when the assembly is in use. The component further comprises a second portion for receiving a second bearing part of the railway rail clip. The first portion and the second portion of the component are spaced apart and interconnected by a connection portion.
    Type: Grant
    Filed: July 4, 2007
    Date of Patent: October 16, 2012
    Assignee: Pandrol Limited
    Inventors: Stephen John Cox, Robert John Hamilton
  • Publication number: 20120187203
    Abstract: A sealing plate (2), for use with a rail clip anchoring device having a head and a stem which extends from the head into a concrete sleeper when the anchoring device is in use, wherein the plate is adapted for extending over the underside of the head when the stem of the device is being set in a concrete sleeper, thereby to prevent ingress of concrete into the head of the device, and for being retained on the surface of the sleeper thereafter, and a face (20) of the plate which is to be exposed on the surface of the sleeper is not adapted to receive part of a rail clip.
    Type: Application
    Filed: April 3, 2012
    Publication date: July 26, 2012
    Applicant: PANDROL LIMITED
    Inventors: Stephen John Cox, Robert John Hamilton
  • Publication number: 20120187207
    Abstract: A railway rail pad (1), for use beneath a railway rail in a rail fastening assembly as cushioning and/or electrical insulation, has first and second major faces (2, 3), the first face (2) having a rail seat portion (20) on which a foot of a railway rail sits when the pad (1) is in use, and side members (4A, 4B) attached to and extending from two opposite edges of the first face (2) of the pad (1). The side members (4A, 4B) are arranged so as to be located on respective opposite sides of the railway rail when the pad (1) is in use such that the rail seat portion (20) of the pad (1) lies between respective inwardly-facing wall faces (41A, 41B) of the said side members (4A, 4B).
    Type: Application
    Filed: August 13, 2010
    Publication date: July 26, 2012
    Applicant: PANDROL LIMITED
    Inventors: Stephen John Cox, Robert John Hamilton, Christopher Gardner
  • Publication number: 20120181344
    Abstract: An electrical insulator for use with a rail fastening clip comprises a contact member providing on one side a substantially flat rail contact surface for contacting a foot of a rail and on the opposing side a clip contact surface for contacting a rail bearing surface of a bearing portion of the clip, the insulator also having retaining means for retaining the insulator on the clip in such a way as to allow rotation of the insulator about a longitudinal axis of the bearing portion of the clip. The insulator has stop portions for limiting such rotation about the longitudinal axis of the bearing portion of the clip to a desired extent. The clip contact surface of the insulator is convex, in a vertical plane which is perpendicular to the longitudinal axis of the bearing portion of the clip, such that, when the insulator is attached to a clip having a flat rail bearing surface, a contact region between the flat rail bearing surface of the clip and the clip contact surface of the insulator is linear.
    Type: Application
    Filed: August 13, 2010
    Publication date: July 19, 2012
    Applicant: Pandrol Limited
    Inventors: Stephen John Cox, Robert John Hamilton, Christopher Gardner
  • Patent number: 8201751
    Abstract: In a railway rail pad having a rail seat portion for receiving a foot of a railway rail, the rail seat portion is provided on at least one major face thereof with a plurality of protrusions which are unevenly distributed across the face of the rail seat portion such that the ratio of the area of the face occupied by the protrusions to the area of the face free of protrusions is greater in an edge region of the rail seat portion than in a central region of the rail seat portion, the edge region being adjacent to one edge of the pad and the central region being adjacent to the edge region. The studs are arranged in columns, each stud being of substantially the same size, and the number of studs in a column in the central region which is closest to said edge region being greater than in a column closer to the center of the rail seat portion.
    Type: Grant
    Filed: October 8, 2008
    Date of Patent: June 19, 2012
    Assignee: Pandrol Limited
    Inventors: Stephen John Cox, Robert John Hamilton
  • Patent number: 7954727
    Abstract: A shoulder for use in retaining a railway rail fastening clip, comprising two interconnected spaced-apart walls, between which a portion of the clip to be retained is held when the shoulder is in use, and clip-engaging means, supported by the walls, for engaging a portion of the clip to be retained, does not have any feature or surface which engages the surface of that clip portion which faces downwardly when the clip is in use. Alternatively, or in addition, none of the contact regions, at which the device engages the rail clip, can be seen when the anchoring device is viewed from above when in its operative orientation and all of the contact regions can be seen when the anchoring device is viewed from below when in the operative orientation. Alternatively, or in addition, all the contact regions lie substantially at the same horizontal distance from the edge of the rail foot when measured perpendicularly to the axis of the rail and in the plane of the rail foot.
    Type: Grant
    Filed: February 21, 2007
    Date of Patent: June 7, 2011
    Assignee: Pandrol Limited
    Inventors: Stephen John Cox, John Phillip Porrill, Robert John Hamilton, Jozef Nevidal, Martin Somerset, Paul Hewlett, Christopher Gardner
  • Publication number: 20100206958
    Abstract: In a railway rail pad having a rail seat portion for receiving a foot of a railway rail, the rail seat portion is provided on at least one major face thereof with a plurality of protrusions which are unevenly distributed across the face of the rail seat portion such that the ratio of the area of the face occupied by the protrusions to the area of the face free of protrusions is greater in an edge region of the rail seat portion than in a central region of the rail seat portion, the edge region being adjacent to one edge of the pad and the central region being adjacent to the edge region. The studs are arranged in columns, each stud being of substantially the same size, and the number of studs in a column in the central region which is closest to said edge region being greater than in a column closer to the centre of the rail seat portion.
    Type: Application
    Filed: October 8, 2008
    Publication date: August 19, 2010
    Inventors: Stephen John Cox, Robert John Hamilton
  • Publication number: 20100181386
    Abstract: A component for use in a rail fastening assembly, the assembly comprising a railway rail fastening clip having a first part for bearing on a railway rail and a railway rail clip anchoring device for retaining the railway rail clip, comprises a first portion adapted to receive a lateral load from the rail when located between a substantially upright face of the rail clip anchoring device and the side of the foot of an adjacent railway rail when the assembly is in use. The component further comprises a second portion for receiving a second bearing part of the railway rail clip. The first portion and the second portion of the component are spaced apart and interconnected by a connection portion.
    Type: Application
    Filed: July 4, 2007
    Publication date: July 22, 2010
    Applicant: PANDROL LIMITED
    Inventors: Stephen John Cox, Robert John Hamilton
  • Publication number: 20090261177
    Abstract: A rail pad is disclosed having two upstanding portions, integrally formed with the rail seat portion along opposite edges thereof, so as to extend along only a central part of the edge. Preferably, the upstanding portions are attached to the rail seat portion in such a manner as to be readily detachable therefrom.
    Type: Application
    Filed: February 21, 2007
    Publication date: October 22, 2009
    Inventors: Robert John Hamilton, Stephen John Cox, John Phillip Porrill, Martin Somerset, Paul Hewlett, Christopher Gardner
  • Publication number: 20090218410
    Abstract: A shoulder for use in retaining a railway rail fastening clip, comprising two interconnected spaced-apart walls, between which a portion of the clip to be retained is held when the shoulder is in use, and clip-engaging means, supported by the walls, for engaging a portion of the clip to be retained, does not have any feature or surface which engages the surface of that clip portion which faces downwardly when the clip is in use. Alternatively, or in addition, none of the contact regions, at which the device engages the rail clip, can be seen when the anchoring device is viewed from above when in its operative orientation and all of the contact regions can be seen when the anchoring device is viewed from below when in the operative orientation. Alternatively, or in addition, all the contact regions lie substantially at the same horizontal distance from the edge of the rail foot when measured perpendicularly to the axis of the rail and in the plane of the rail foot.
    Type: Application
    Filed: February 21, 2007
    Publication date: September 3, 2009
    Applicant: PANDROL LIMITED
    Inventors: Stephen John Cox, John Phillip Porrill, Robert John Hamilton, Jozef Nevidal, Martin Somerset, Paul Hewlett, Christopher Gardner