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. 06, 2001
Filed:
Jun. 02, 1998
Paul Goldthorpe, Wigan, GB;
Valley Industries Limited, Wigan, GB;
Abstract
A liner for a manhole, inspection chamber or the like comprises one or more sections moulded from synthetic plastics material. The or each section comprises inner and outer skins (,) joined together by two series of webs (,) extending between and at right angles to the skins (,). The webs (,) are disposed at the upper edges (,) of the section and the webs (,) extend between a position below those upper edges (,) and a position at its lower end. The upper edges (,) and lower periphery (,) of each section are formed so that superposed sections interlock. The arrangement provides an easily installable corrosion resistant load bearing yet light, rigid and deformation resisting structure.