Metallurgical apparatus – Means treating solid metal – By contact with gas
Reexamination Certificate
2007-10-10
2010-11-30
Kastler, Scott (Department: 1793)
Metallurgical apparatus
Means treating solid metal
By contact with gas
C266S251000
Reexamination Certificate
active
07842230
ABSTRACT:
A continuous carburizing furnace includes a furnace having a carburizing zone for performing a carburizing process on a workpiece while the workpiece is conveyed; and a plurality of regions disposed successively in a direction of conveyance upstream from the carburizing zone, the carburizing zone being provided with an intermediate door being opened and closed between the carburizing zone and the upstream side therefrom. Also included is at least a single lift mechanism for lowering the workpiece in a region other than a region of the most upstream side among the plurality of regions; and a plurality of pushers for pushing the workpiece at each of the plurality of regions to regions downstream therefrom or to the carburizing zone, the plurality of pushers being disposed so as to push the workpiece at successively lowered levels of height one after another in the direction of conveyance.
REFERENCES:
patent: 7507087 (2009-03-01), Tenzek
patent: 2004-010945 (2004-01-01), None
patent: 2006137964 (2006-06-01), None
Minamiguchi Masanori
Tanaka Yasunori
Kastler Scott
Koyo Thermo Systems Co., Ltd.
Renner , Otto, Boisselle & Sklar, LLP
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