The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 23, 1993
Filed:
Jul. 06, 1992
Applicant:
Inventors:
Geoffrey G Leeves, Bearsted, GB;
Paul A Abraham, Dunstable, GB;
Assignee:
Pandrol Limited, Weybridge, GB;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E01B / ;
U.S. Cl.
CPC ...
238283 ; 238382 ; 267141 ;
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.