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:
Apr. 26, 1988
Filed:
Jan. 20, 1987
Applicant:
Inventor:
Yutaka Watanabe, Yokohama, JP;
Assignee:
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Primary Examiner:
Int. Cl.
CPC ...
F25B / ;
U.S. Cl.
CPC ...
6251 / ; 165169 ;
Abstract
A compact and easy-to-construct cylindrical counter-flow heat exchanger is provided for cryogenic refrigeration systems. It has an annular body, a helical pipe wound around and in contact with the annular body, and a sleeve which envelopes the helical pipe. A helical flow passage is formed around the annular body in contact with the helical pipe. A high-pressure fluid is introduced into a helical pipe, while a low-pressure fluid flows through the helical flow passage. Heat is exchanged between the two fluids through the helical pipe wall which is made of high heat-conductivity material such as copper.