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:
Nov. 19, 2013
Filed:
Mar. 06, 2009
Norihisa Watanabe, Fuji, JP;
Norihisa Watanabe, Fuji, JP;
Toshiba Carrier Corporation, Tokyo, JP;
Abstract
A refrigerant compressor includes a first layer () composed of a single layer of chromium, a second layer () composed of an alloy layer of chromium and tungsten carbide, a third layer () composed of an amorphous carbon layer containing at least one of tungsten and tungsten carbide, and a fourth layer () composed of an amorphous carbon layer containing carbon and hydrogen without metals, which are sequentially formed on a surface of a sliding member () of a compression mechanism formed of tool steel. The second layer () is formed to have a chromium content higher on a side of the first layer () than a side of the third layer (), and have a tungsten carbide content higher on the side of the third layer () than the side of the first layer (). In addition, the third layer () is formed to have a tungsten content or a tungsten carbide content higher on a side of the second layer () than a side of the fourth layer ().