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US 5,685,041 AGranted
Pipe pig with abrasive exterior
OwnerOrlande Sivacoeinventor
Life of this patent
Estimating the term…
Abstract
A method of making a rotationally symmetric pipe pig in which porous abrasive material is adhered to the periphery of the pipe pig. A liquid applied surface layer of the pig body forms an adhesive for the porous abrasive material, which is cured after the application of the porous abrasive material. A porous abrasive material is alumina ceramic beads. The pipe pig thus formed has a porous abrasive material adhered to the periphery of the pipe pig.
Claims4
A pipe pig comprising:
- (a) an elongated resilient pig body having an axis of symmetry along the length thereof, said pig body having a nose at a first end thereof, said pig body further comprising a core and a surface layer, said surface layer completely covering said core, the surface layer also having a hardness greater than that of said core, the material of said surface layer having an adhesive property;
- and
- (b) a porous particulate abrasive material adhesively adhered to said pig body by said surface layer, said abrasive material covering substantially the entire periphery of said pig body, the porous nature of said particulate abrasive material allowing the material of said surface layer to finger into the pores thereof whereby a strong bond is formed between the abrasive particulate material and the surface layer of said pig body.
Dependencies are inferred from the claim text.