Hydraulic and earth engineering – Subterranean or submarine pipe or cable laying – retrieving,... – With protection or indication of pipe or trench
Patent
1997-04-09
1999-02-16
Graysay, Tamara L.
Hydraulic and earth engineering
Subterranean or submarine pipe or cable laying, retrieving,...
With protection or indication of pipe or trench
405154, 248 49, 248903, F16L 100
Patent
active
058713069
ABSTRACT:
A pipe supporting apparatus including a pipe supporting portion securable within a trench beneath a length of pipe for support thereof before filling the trench around the length of pipe with backfill material.
REFERENCES:
patent: 3767149 (1973-10-01), Hill
patent: 3895496 (1975-07-01), Perrott et al.
patent: 4126012 (1978-11-01), Waller
patent: 4979462 (1990-12-01), Kramer
patent: 5007768 (1991-04-01), Waller
patent: 5553975 (1996-09-01), Elkins
Graysay Tamara L.
Lagman Frederick L.
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