Pipes and tubular conduits – Plural duct – Surrounding radially spaced duct with axially spaced...
Patent
1996-02-12
1998-05-12
Gerrity, Stephen F.
Pipes and tubular conduits
Plural duct
Surrounding radially spaced duct with axially spaced...
138103, 138114, 138DIG8, 264295, 264573, F16L 918
Patent
active
057493987
ABSTRACT:
A flexible conduit which utilizes internal spacers and form wires to maintain dimensional integrity during contouring. Once formed into the desired configuration, the system can be made rigid by the injection of pressure into one or more internal elastomeric tubes which expand to solidify the structure. The "fixed" form can then be removed and measurements made for fabricating conforming production pipes and tubes.
REFERENCES:
patent: 3250297 (1966-05-01), Mooneyham
patent: 3992505 (1976-11-01), Tally
patent: 4118162 (1978-10-01), Baumgarten
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