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. 27, 1988
Filed:
Oct. 14, 1987
Applicant:
Inventors:
Gyula Gyory, Szolnok, HU;
Zoltan Florian, Nagykanizsa, HU;
Assignees:
Koolajkutato Vallalat, Szolnok, HU;
Dunantuli Koolajipari Gepgyar, Nagykanizsa, HU;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16L / ; F16L / ;
U.S. Cl.
CPC ...
138114 ; 138149 ; 285 47 ;
Abstract
A heat insulating tube, primarily for underground mining, is provided with an outer casing and an inner casing, separated from the other casing by a connecting element and a series of spacer rings. The distance between the connecting element and the spacer rings as well as between the spacer rings themselves is in the range of about 20 to 50 times the diameter of the inside casing.