Segment for a rehabilitating pipe

Details Segment for a rehabilitating pipe Segment for a rehabilitating pipe

2008-01-29

2008-01-29

Bochna, David (Department: 3679)

Pipes and tubular conduits

Longitudinally seamed

Sectional

C138S155000, C138S160000, C285S015000

Reexamination Certificate

active

07322382

ABSTRACT:
A segment for a rehabilitating pipe is coupled to another segment in the circumferential and longitudinal directions of a rehabilitating pipe to rehabilitate an existing pipe. The segment has on one coupling surface a protruding part and a recessed part continuous with the protruding part and on another coupling surface a recessed part and a protruding part whose shapes respectively conform to the protruding part and the recessed part of one coupling surface. The protruding part and the recessed part of one coupling surface of one segment is brought into tight surface contact with the recessed part and protruding part of another coupling surface of another segment and interfitted thereto when one and another segments are mutually coupled in the circumferential and longitudinal directions of the rehabilitating pipe.

REFERENCES:
patent: 1211784 (1917-01-01), Stuart
patent: 1225867 (1917-05-01), Schumacher
patent: 1329522 (1920-02-01), Griffin
patent: 1331986 (1920-02-01), Griffin
patent: 1331987 (1920-02-01), Griffin
patent: 1331988 (1920-02-01), Griffin
patent: 1668855 (1928-05-01), Ludlum
patent: 3708187 (1973-01-01), Campbell
patent: 4105051 (1978-08-01), Visentin
patent: 4130300 (1978-12-01), Sheridan
patent: 4199175 (1980-04-01), Paukune
patent: 4429907 (1984-02-01), Timmons

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