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. 28, 1993
Filed:
Mar. 19, 1992
Nobuyuki Matsui, Tokyo, JP;
Kazunobu Abe, Tokyo, JP;
Makoto Kayo, Tokyo, JP;
Osamu Sakaguchi, deceased, late of Osaka, JP;
Itsuko Sakaguchi, legal representative, Toyoshina, JP;
Yasuharu Kiso, Osaka, JP;
Masaya Hiraoka, Osaka, JP;
Kajima Corporation, Tokyo, JP;
Abstract
A method and apparatus for the maintenance of snow quality on an indoor artificial ski slope. The snow quality of the slope, comprising a thin compacted surface layer and a deep unfused base layer, is maintained by promptly managing against the variations of snow quality due to various heat sources. The old surface layer snow is replaced with fresh snow on a daily basis, while deterioration of the snow base layer is prevented by air conditioning and refrigeration means. The old snow is melted, filtered, and used to make new snow, to air condition the slope, and to expedite melting of yet additional old snow.