Slipline adjustable manhole seal

Details Slipline adjustable manhole seal Slipline adjustable manhole seal

1984-08-27

1986-10-28

Taylor, Dennis L.

Hydraulic and earth engineering

Subterranean or submarine pipe or cable laying, retrieving,...

138 97, 285138, F16L 100

Patent

active

046195556

ABSTRACT:
Improvements in the technique of sliplining a buried pipe, so as to minimize adverse affects of differences in expansion and contraction of the old and new pipe, while maintaining seals at the ends thereof is disclosed employing at each pipe end a sleeve-like pliable gasket, which is expanded outwardly into contact with the inner surface of the old pipe, and somewhat beyond the end of the old pipe, is contracted inwardly into contact with the other surface of the new or sliplined pipe. The sleeve-like gasket can compensate for thermally induced pipe line and liner axial length changes, without breaking the seal between the two, while seal installation is facilitated by the accessability of the sleeve-like gaskets extending beyond the ends of the old pipe.

REFERENCES:
patent: 2500601 (1950-03-01), Butler
patent: 3123101 (1964-03-01), Blount et al.
patent: 3221758 (1965-12-01), Morse
patent: 3543377 (1970-12-01), Bremner
patent: 4170248 (1979-10-01), Bennett et al.
patent: 4242164 (1980-12-01), Skinner
patent: 4478437 (1984-10-01), Skinner

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