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:
May. 25, 2010
Filed:
Aug. 29, 2007
Kenjiro Sato, Nagoya, JP;
Kenjiro Sato, Nagoya, JP;
Abstract
The vacuum carburizing apparatus introduces a carburizing gas into a carburizing chamber to subject the treatment material to vacuum carburizing. The vacuum carburizing apparatus comprises a carburizing chamber that houses a treatment material therein, a vacuum pump that exhausts gas from the carburizing chamber inside to obtain vacuum, a carburizing gas supply unit that supplies carburizing gas into the carburizing chamber in pulse mode, a reflux pipe which connects an intake side of the vacuum pump and an exhaust side of the vacuum pump, an opening and closing valve which is provided on the way of the reflux pipe, and a control unit which opens the opening and closing valve when a supply of the carburizing gas into the carburizing chamber is started, wherein the control unit closes the opening and closing valve when the supply ends.