Shell for pipe repair

Details Shell for pipe repair Shell for pipe repair

1997-03-11

1999-02-09

Arola, Dave W.

Pipe joints or couplings

Repair

285370, 285424, F16L 5510

Patent

active

058684344

ABSTRACT:
A tubular metal shell (10) with mutually overlapping ends serving to line the insides of damaged sewer pipes (22) possesses an intermediate portion (18) located between two end portions (16), the intermediate portion (18) having, as a result of a plurality of axial slots, a lower resistance to distortion than the end portions (16). When such a shell (10) is installed in a sewer pipe with offset connecting sleeves in such a way that the intermediate portion (18) of the shell (10) where the material has been weakened reaches the region of radial offset, the intermediate portion (18) can distort, thus forming a transition between the two radially offset sections of pipe (24, 26). At least the intermediate portion (18) is sealed all round with an elastic sealant or a hose. The repair shell (10) is particularly suitable for repairing sewer pipes with offset connecting sleeves.

REFERENCES:
patent: Re20308 (1937-03-01), McKee
patent: 1829236 (1931-10-01), Perkins
patent: 1977175 (1934-10-01), Davis
patent: 1983989 (1934-12-01), Pallas
patent: 2179193 (1939-11-01), Parrish
patent: 3680896 (1972-08-01), Cupit
patent: 3700265 (1972-10-01), Dufour
patent: 4647072 (1987-03-01), Westman
patent: 4865357 (1989-09-01), Brinegar
patent: 5465758 (1995-11-01), Graf et al.

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