Pipe joints or couplings – Pipe to discreet nipple or sleeve to plate – Pipe to nipple connection dependent on nipple to plate...
Patent
1990-02-26
1992-08-11
Arola, Dave W.
Pipe joints or couplings
Pipe to discreet nipple or sleeve to plate
Pipe to nipple connection dependent on nipple to plate...
285187, 285369, 285383, 285294, 285915, F16L 3904
Patent
active
051373068
ABSTRACT:
A multiple duct conduit system (10) includes conduit sections with elongated outer ducts (18) and inner ducts (19) are disposed therewithin and the conduit sections are connected in end-to-end relationship for carrying fiber optic cables and the like. The inner ducts (19) are formed of a material having a coefficient of thermal expansion which is different from that of the outer ducts and the inner ducts expand and contract with respect to the outer ducts as temperatures change. Couplings (16) connect the ends of the conduit sections and define passageways (31-34) constructed with expansion chambers (48) to accommodate changes in the lengths of the inner ducts (19) with respect to the outer ducts (18).
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Arola Dave W.
The George-Ingraham Corp.
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