# US 2014/0190585 A1 · Method for controlling creep in spirally expandable profile > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0190585 A1 - Document ID: US20140190585A1 - Status: Published application - Kind: A1 - Application number: 14/237,247 - Filed: 2012-08-06 - Published: 2014-07-10 - Earliest claimed: 2011-08-05 - Assignees: Elegant Technical Solutions Pty Limited - Inventors: Ron Weaver - Web page: https://patentgrep.com/patent/US20140190585A1 ## CPC - F16L 55/1655: {a pipe being formed inside the old pipe by winding strip-material} - B29C 53/78: using profiled sheets or strips - B29C 63/32: by winding helically - F16L 9/16: wound from sheets or strips, with or without reinforcement - F16L 11/16: wound from profiled strips or bands - Y10T 428/24777: Edge feature - F16L: PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL - B29C: SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING (making preforms B29B11/00; making laminated products by combining previously unconnected layers which become one product whose layers will remain together B32B37/00 - B32B41/00) - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract An elongated web or strip (200) comprising a wall portion bounded by edge portions and adapted to form a conduit by spirally winding said web and joining adjacent edge portions. The edge portions (210, 220) are adapted to permit relative movement between adjacent portions of the spiral conduit and thereby provide radial alteration of the conduit. The web includes a compensation portion (300) to alter the dimension of the web (200) upon radial alteration of the conduit and thereby compensate for creep in the spiral conduit. In a particularly preferred embodiment the edge portion comprises a primary lock (214, 224) and a secondary or sacrificial lock (212, 222). The sacrificial lock is disengaged by release of the mechanism 215 to permit relative movement there between and thereby effect radial alteration of the conduit. ## Claims ### Claim at position 1 1-20. (canceled) ### Claim 21 An elongated web or strip comprising a wall portion bounded by edge portions and adapted to form a conduit by spirally winding said web and joining adjacent edge portions, said edge portions including a primary locking formation and a secondary or sacrificial locking formation being adapted to permit relative movement of adjacent edge portions of said spiral conduit to thereby provide radial alteration of said conduit upon severing or disengagement of said secondary/sacrificial lock formation, said web further comprising a compensation portion to alter the dimensions of said web upon radial alteration of said conduit and thereby compensate for creep (as hereinbefore defined) in said spiral conduit, said compensation portion being provided at or directly adjacent one of said edge portions such that apart from the joint between adjacent webs, the interior surface of the web is substantially smooth and free of dislocations. ### Claim 22 (depends on 21) A web or strip as claimed in claim 21 wherein said web is configured such that upon application of creep, said compensation portion provides substantially identical alteration of the dimensions of said web around the circumference of said conduit. ### Claim 23 (depends on 21) A web or strip as claimed in claim 21 wherein said compensation portion alters the width of said web upon radial alteration of said conduit. ### Claim 24 (depends on 21) A web or strip as claimed in claim 21 wherein said web includes a selectively engageable mechanism to effect said radial alteration. ### Claim 25 (depends on 24) A web or strip as claimed in claim 24 wherein said selectively engageable mechanism co-operates with said compensation portion such that said compensation portion is only activated upon said radial alteration. ### Claim 26 (depends on 21) A web or strip as claimed in claim 21 wherein said compensation portion is provided by a resilient material formed in said web. ### Claim 27 (depends on 21) A web or strip as claimed in claim 21 wherein said compensation portion is provided by an expandable formation in said web. ### Claim 28 (depends on 21) A web or strip as claimed in claim 21 wherein said compensation portion is provided by a compressible formation in said web. ### Claim 29 (depends on 21) A web or strip as claimed in claim 21 wherein a plurality of a compensation portions are provided in said web. ### Claim 30 (depends on 21) A web or strip as claimed in claim 21 wherein said compensation portion is provided between said primary locking formation and said secondary or sacrificial locking formation. ### Claim 31 (depends on 21) A web or strip as claimed in claim 21 wherein said compensation portion is provided directly adjacent one of said primary locking formation or said secondary/sacrificial lock formation. ### Claim 32 (depends on 21) A web or strip as claimed in claim 21 wherein said compensation portion is activateable upon disengagement of said sacrificial lock portion. ### Claim 33 (depends on 21) A web or strip as claimed in claim 21 wherein said compensation portion is configured to provide little or no compensation for creep during winding and/or installation of said conduit. ### Claim 34 (depends on 21) A web or strip as claimed in claim 21 wherein said conduit is provided by a plurality of webs, at least one of said webs including said compensation portion. ### Claim 35 (depends on 21) A web or strip as claimed in claim 21 said conduit is a pipe liner or cover. ### Claim 36 (depends on 21) A conduit, pipe liner or cover produced from an elongated web or strip as claimed in claim 21. ### Claim 37 A method of compensating for creep (as hereinbefore defined) in a conduit constructed from a spirally wound web, said method comprising providing said web with a compensation portion at or directly adjacent one or more edge portions of the web, said compensation portions being adapted to compensate for variation in length of said conduit liner resulting from expansion or contraction of the conduit liner diameter. ### Claim 38 (depends on 37) A method as claimed in claim 37 wherein upon application of creep, said compensation portion alters the dimensions of said web in a substantially identical fashion around the circumference of said conduit. ### Claim 39 (depends on 37) A method as claimed in claim 37 wherein said compensation portion is selectively engageable such that it remains deactivated during spiral winding of said web and is activated upon expansion or contraction of said conduit. ### Claim 40 A method of installing conduit comprising providing an elongated web or strip bounded by edge portions and adapted to form a conduit by spirally winding said web and joining adjacent edge portions, wherein said conduit is expanded or contracted to the desired diameter, said method comprising compensating for creep (as hereinbefore defined) during said expansion or contraction by providing said web with a compensation portion at or directly adjacent one or more edge portions of the web, said compensation portions being adapted to alter the dimensions of said web during and/or after said expansion/contraction. ### Claim 41 (depends on 20) A method as claimed in claim 20 wherein upon application of creep, said compensation portion alters the dimensions of said web in a substantially identical fashion around the circumference of said conduit. ### Claim 42 (depends on 20) A method as claimed in claim 20 wherein said compensation portion is selectively engageable such that it remains deactivated during spiral winding of said web and is activated upon expansion or contraction of said conduit.