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:
Feb. 03, 1998
Filed:
Apr. 15, 1997
Thomas D O'Rourke, Ithaca, NY (US);
Cornell Research Foundation, Inc., Ithaca, NY (US);
Abstract
A low friction slip-sleeve wrap for buried structures such as pipelines, pilings or the like. The pipe is coated in a polymer coating such as HDPE or FBE, then wrapped in a polymer mesh such as geonet or geogrid without any friction-increasing means such as friction coatings or fillings or bonding of layers. Finally, a layer of geotextile is wrapped over the polymer mesh layer. In addition to the reduction of friction and shear transfer from the ground to the pipe or foundation element, which acts to protect the structure from damage due to earthquakes or land slippage, the low friction slip-sleeve wrap of the invention has several other advantages. The porosity of the geotextile allows for cathodic protection. The geogrids, geonets, and geotextiles used in the wrap are relatively inexpensive and readily available. Moreover, the wrap can be applied in the field easily, with minimal time delay, and located as required along all or selected lengths of the pipeline or foundation element. Because the wrapping can be applied easily in sections, it also can be used on large conduits, including large diameter water pipelines (greater than 4 ft) and tunnels.