The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 02, 1980
Filed:
Jul. 16, 1979
Peter Rohner, Isernhagen, DE;
Abstract
A method of fabricating a plurality of heat transfer conduits is disclosed wherein an elongated metal pipe is evacuated, a predetermined quantity of heat transfer fluid is placed within such evacuated pipe and the pipe ends sealed airtight. The elongated sealed pipe is wound in a helical or serpentine configuration, the lower vertical portions of the so configured pipe are heated so that the liquid phase of the heat transfer fluid is evaporated and redistributed in an even manner in the lower vertical portions of successive convolutions of such pipe, and is then flattened, for example, at each of its upper vertical portions to form vacuum-tight seals between adjacent convolutions. A cutting procedure across each of the flattened upper portions (or selected ones of such flattened upper portions) enables a separation of the elongated sealed pipe into a plurality of heat transfer conduits without the necessity of a further evacuation procedure.