Pandrol Limited

Robert John Hamilton

Stephen John Cox

Christopher Gardner

John Phillip Porrill

Martin David Somerset

Paul Hewlett

Jozef Nevidal

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.

Pad for a railway rail fastening assembly

A railway rail pad (), for use beneath a railway rail in a rail fastening assembly as cushioning and/or electrical insulation, has first and second major faces (), the first face () having a rail seat portion () on which a foot of a railway rail sits when the pad () is in use, and side members (A,B) attached to and extending from two opposite edges of the first face () of the pad (). The side members (A,B) are arranged so as to be located on respective opposite sides of the railway rail when the pad () is in use such that the rail seat portion () of the pad () lies between respective inwardly-facing wall faces (A,B) of the said side members (A,B). When the pad () is not under load and is placed so as to rest on a surface with the first face () of the pad () uppermost and part of the surface lying beneath the rail seat portion of the pad, an inclination angle (&#x3b1;, &#x3b1;) between the wall face (A,B) of each side member (A,B) and that part of the surface beneath the rail seat portion on which the pad () is resting is greater than 90&#xb0;. When the pad is not under load, the first face is substantially convex in a vertical plane that is perpendicular to the longitudinal axis of the rail when the pad is in use.

Railway rail pad

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. The insulator is rockable about the linear contact region within the extent defined by the stop portions such that, when the rail contact surface of the insulator contacts the surface of a rail foot, the angle of the rail contact surface can conform to the angle of the rail foot surface. A rail fastening clip, suitable for use with the insulator and of the kind driven onto a rail in a direction which is parallel to a longitudinal axis of the rail, has a bearing portion having a flat rail bearing surface, wherein a detent, extending laterally with respect to the longitudinal axis of the bearing portion, is formed in the flat rail bearing surface, at a location spaced from a free end of the bearing portion of the clip, for engaging a corresponding abutment surface of the insulator to be retained on the rail bearing portion of the clip.

Insulator for railway fastening clip and railway rail fastening clip for use therewith

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.

Components for rail fastening assembly

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. The studs are also arranged in rows, wherein the ratio of protrusions to free area in a row of studs adjacent to, but spaced from, the center of the rail seat portion is greater than that in a row further from the center.

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.

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Woking, United Kingdom

Robert John Hamilton