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US 2008/0174110 A1Published application
Elastomer lined, abrasion resistant pipe and method for manufacture
OwnerJohn Frederick Olsoninventor
Life of this patent
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Abstract
An abrasive material transferring pipe is lined with a cured shape memory retaining elastomeric liner. The inner surface of the pipe is in contact with the outer surface of the elastomeric liner. When the liner is not under tension, the outer diameter of the elastomeric liner is larger than the inner diameter of the pipe. Expansion pressure by the liner maintains the liner in the pipe.
Claims20
A method of forming an elastomeric lined pipe, the method comprising:
- inserting a first plug inside a first end of a cured elastomeric liner and inserting a second plug inside a second end of the cured elastomeric liner;
- applying tension to the liner by pulling on the first plug to elongate the liner and reduce outer diameter of the liner from an original outer diameter without heat or a compressing device;
- sliding a pipe having a first and second end over the liner so that a central portion of the liner is inside the pipe and the first and second ends of the liner extend from the first and second ends of the pipe;
- and
- reducing the tension on the liner so that the outer diameter of the liner increases and the liner fits tightly against inner surface of the pipe.
2 more elements
An elastomeric lined pipe comprising:
- an abrasive material transferring pipe having a first end, a second end, an inner surface, and an inner diameter;
- a cured shape memory retaining elastomeric liner having a first end, a second end, an outer surface, and an outer diameter, the inner surface of the pipe in contact with the outer surface of the liner, wherein the first end of the pipe is proximate the first end of the liner, and wherein expansion force of the liner keeps the liner in the pipe;
- and
- a first hardened insert wherein one end of the first hardened insert meets the first end of the cured elastomeric liner.
1 more element
A method forming an elastomeric lined pipe, the method comprising:
- elongating a cured elastomeric liner about a horizontal axis with tension force so that outer diameter of liner is reduced;
- sliding a pipe over a central portion of the liner so that the liner is inside the pipe and first and second ends of the liner extend from the pipe;
- reducing the tension force so that the outer diameter of the liner increases and liner fits tightly against inner surface of the pipe;
- and
- inserting a beveled-end hardened insert into an end of the pipe so that the hardened insert meets the liner at a beveled lap joint.
2 more elements
Dependencies are inferred from the claim text.