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:
Feb. 16, 1993
Filed:
Jan. 13, 1992
Takeshi Nishizawa, Tokyo, JP;
Kazuhiko Ooba, Tokyo, JP;
Furukawa Electric Co., Ltd., Tokyo, JP;
Abstract
According to the invention, there is provided a heat transmission tube having a tube body, first grooves formed at a predetermined pitch therebetween on an outer surface of the tube body continuously along a circumferential direction, the first grooves open to an outside, and having an opening portion, a width of which is narrower than that of a bottom portion thereof, and second grooves formed at a predetermined pitch therebetween on the outer surface of tube body continuously along an axial direction, the second grooves having a depth shallower than that of the first grooves, and connecting opening portions of the adjacent first grooves to each other, wherein a projecting member is provided on a bottom surface of each of the first grooves so as to connect a side wall of each of the first grooves to another is brought into contact with the tube body. This heat transmission tube exhibits a high and stable heat transmissibility in both high and low heat flux cases.