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:
Jul. 29, 1980
Filed:
Jul. 21, 1978
Hiroaki Hayashi, Tokyo, JP;
Kiyoshi Fukuda, Tokyo, JP;
Hiroshi Kubo, Osaka, JP;
Noriyasu Yoshikawa, Osaka, JP;
Hiroshi Takada, Osaka, JP;
The Tokyo Electric Power Company, Tokyo, JP;
Sumitomo Electric Industries, Ltd., Osaka, JP;
Abstract
A natural circulation type evaporative cooling electric power cable line having a circulation system for the cooling medium wherein a cooling medium passage within the electric power cable line has an inlet and an outlet respectively connected with a cooling unit positioned at a level higher than the cooling medium passages inlet of the cable by means of a feeding pipe and a return pipe with a liquefiable gas cooling medium sealed therein. At least a riser portion of the return pipe leading to the cooling unit is installed below the level of the cooling medium return passage outlet of the cable, and the return pipe is provided with a device for boosting circulation force without positive displacement mechanism (such as a pump or the like), so as to make the cooling medium circulate even in a low load current region by exceeding the current allowable without cooling for that cable.