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. 13, 1983
Filed:
Jun. 30, 1981
Isao Okouchi, Hitachi, JP;
Sankichi Takahashi, Hitachi, JP;
Yasuteru Mukai, Hitachi, JP;
Katsumoto Otake, Hitachi, JP;
Takuya Sasaki, Hitachi, JP;
Masahiko Miyai, Mito, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
In a cleaning system for heat conductive conduits of a heat exchanger, a great number of balls are circulated through the conduits for mechanically removing incrustations formed on the inner surfaces of the conduits. In order to automatically operate the cleaning system, there are provided with ball counters, one of which counts the number of balls actually circulating the system and the other count the number of balls to be withdrawn out of the system or replaced with new balls because of worn out or breakage. The number of balls circulating is always maintained at a certain level necessary for effective cleaning by a controller which actuates various valves to maintain the number of balls in response to the signal generated by the ball counters.