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:
Sep. 16, 1986
Filed:
Jan. 14, 1985
Applicant:
Inventor:
Kazuo Ohashi, Tokyo, JP;
Assignee:
Kabushiki Kaisha Patine Shokai, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F25C / ;
U.S. Cl.
CPC ...
62235 ; 165133 ; 165163 ;
Abstract
An apparatus for forming an ice layer over a wide area such as a skating rink is disclosed. A freezing medium including a liquefied gas such as freon or ammonia or an anti-freeze liquid such as brine or ethylene glycol is circulated through a freezing pipe laid in the wider area such as skating rink. According to the invention, the freezing pipe is of a nature that can be wound or extended under pressure application and is formed as an elongated soft steel pipe having a coating of synthetic material on the outer surface or on both the inner and outer surfaces of the pipe.