Pipe joints or couplings – With casing – lining or protector – Insulated
Patent
1975-04-30
1977-05-24
Callaghan, Thomas F.
Pipe joints or couplings
With casing, lining or protector
Insulated
138149, 285DIG5, F16L 5916
Patent
active
040250911
ABSTRACT:
A conduit system including conduit units which are interconnected by coupling units during field installation. The conduit units include a pipe, a pipe insulating body, a conduit jacket around the insulating body and conduit sealing members at opposite ends of the conduit unit. The coupling units include a coupling body for telescopically receiving ends of adjacent conduit pipes, an insulating body, a coupling jacket around the insulating body, and coupling sealing members at opposite ends of the coupling unit.
When the coupling and conduit units are assembled the sealing member of one unit bridges the juncture of adjacent jacket ends to provide a primary seal against infiltration of moisture. The sealing members of adjacent units sealingly abut each other to provide a secondary seal against moisture infiltration spaced axially from the adjacent ends of the conduit and coupling jackets. The sealing member which forms the primary seal is provided with a fluted outer periphery defining a series of circumferential ribs which are resiliently and sealingly engaged with the associated jackets on opposite sides of the adjacent jacket ends.
In one illustrated embodiment the sealing member forming the primary seal is the conduit sealing member while in another illustrated embodiment the coupling sealing member forms the primary seal.
REFERENCES:
patent: 3492029 (1970-01-01), French et al.
patent: 3563572 (1971-02-01), French
patent: 3645564 (1972-02-01), Corriston
patent: 3854756 (1974-12-01), Couch
Callaghan Thomas F.
Ric-Wil, Incorporated
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