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Patent Searching and Data


Title:
CLOSED TYPE CONTROLLED ATMOSPHERE HEAT TREATMENT FURNACE
Document Type and Number:
Japanese Patent JP2009243738
Kind Code:
A
Abstract:

To provide a closed type controlled atmosphere heat treatment furnace not requiring extra purge gas nor purge time, for achieving energy saving and a reduction in cost for heat treatment, and paying attention to safety of a worker handling a furnace.

The closed type controlled atmosphere heat treatment furnace includes an oxygen concentration sensor for detecting the oxygen concentration in the furnace, and a furnace throat door locking means (furnace throat door shutter 4) for preventing access into the furnace in a high temperature, oxygen deficient state by a signal from the oxygen concentration sensor when the oxygen concentration in the furnace is lowered to a prescribed value or less, so that the worker mistakenly opening the furnace throat door before completion of heat treatment is prevented.


Inventors:
Okamoto, Masato
Arii, Hironobu
Furuwari, Hajime
Application Number:
JP2008000089691
Publication Date:
October 22, 2009
Filing Date:
March 31, 2008
Export Citation:
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Assignee:
KOYO THERMO SYSTEM KK
International Classes:
F27B5/18; F27B5/04; F27D1/18; F27D7/06; F27D19/00
Domestic Patent References:
JP2007032918A
JP2003272847A
JP2006013210A
JP2003279261A
JP2009194358A
JP2002540320A
Attorney, Agent or Firm:
河▲崎▼ 眞樹