Inner-space-sectioned tubes and method for manufacturing the...

Details Inner-space-sectioned tubes and method for manufacturing the... Inner-space-sectioned tubes and method for manufacturing the...

2007-03-12

2008-10-07

Brinson, Patrick F (Department: 3754)

Pipes and tubular conduits

Plural duct

Longitudinally extending common wall

C138S111000, C138S114000, C138S117000

Reexamination Certificate

active

07431053

ABSTRACT:
An inner-space-sectioned tube wherein, in manufacturing the tube having four or more independent fluid channels formed inside thereof, while at least two lengths of inner tubes are set to inscribe an outer tube, cold working is applied, which is a simple manufacturing process, thereby enabling to reduce the number of cold drawing passes and allowing the inner space of the tube, even if the outer tube is small in size, to effectively be allocated for four independent fluid channels. Further, this inner-space-sectioned tube adopts a simple tube structure wherein the number of constituting members is reduced, thereby enabling to reduce weight while ensuring tube strength and to achieve further reduction of manufacturing costs.

REFERENCES:
patent: 2929408 (1960-03-01), Smith et al.
patent: 07-144221 (1995-06-01), None

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