Method of making double wall tubing assembly

Details Method of making double wall tubing assembly Method of making double wall tubing assembly

1982-04-26

1984-01-31

Husar, Francis S.

Metal working

Means to assemble or disassemble

Puller or pusher means, contained force multiplying operator

291573AH, 291573B, 165 11R, 165 70, 165179, B21D 5300

Patent

active

044281064

ABSTRACT:
Improved double wall tubing assembly which is especially useful in heat exchangers of the "coil-in-can" type for solar applications has a double wall construction which insures that a leak developing from a failure in either of the walls will not result in a mixing of fluid external to the outer tube with the fluid flowing internally of the inner tube. An outwardly projecting helical fin configuration formed on the outer surface of the inner tube provides an effective heat transfer medium between the inner and outer walls of the tube assembly while defining a spiral flow channel through which leakage entering through either wall can flow and be detected. A method of making the double wall tube assembly is disclosed wherein a finned outer tube is assembled over a previously finned inner tube. The assembled tubes are then brought into firm mechanical contact by the step of forming the assembled tubes into a coil and/or by expanding the inner tube. An additional method is also disclosed wherein a plain outer tube is assembled over a previously formed inner tube and then contacted by finning tools which fin its outer surface and bring its inner diameter into intimate contact with the inner tube.

REFERENCES:
patent: 2913009 (1959-11-01), Kuthe
patent: 3683656 (1972-08-01), Lewis
patent: 3768290 (1973-10-01), Zatell
patent: 3768291 (1973-10-01), Rieger

Affiliated with

Also associated with

Rating

Method of making double wall tubing assembly does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method of making double wall tubing assembly, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of making double wall tubing assembly will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2339393