Metallurgical apparatus – With control means responsive to sensed condition – With means supplying a treating agent
Reexamination Certificate
2007-04-17
2007-04-17
Kastler, Scott (Department: 1742)
Metallurgical apparatus
With control means responsive to sensed condition
With means supplying a treating agent
C266S252000
Reexamination Certificate
active
11263551
ABSTRACT:
Vacuum carburizing of ferrous workpieces is performed at low pressure in a vacuum furnace using a carburizing hydrocarbon as the carburizing medium. The furnace is constructed to be generally transparent to the carburizing hydrocarbon so that cracking tends to occur at the workpiece which functions as a catalyst to minimize carbon deposits. The carburizing hydrocarbon is supplied in liquid form to an injector which injects the liquid carburizing hydrocarbon as a vapor to produce a uniform dispersion of the carburizing hydrocarbon about the workpiece, resulting in uniform carburizing of the workpieces.
REFERENCES:
patent: 2348557 (1944-05-01), Mattox
patent: 2915571 (1959-12-01), Haensel
patent: 3529152 (1970-09-01), Strange et al.
patent: 3917238 (1975-11-01), Gohring
patent: 3968957 (1976-07-01), Asai et al.
patent: 4008394 (1977-02-01), Risgin et al.
patent: 4030712 (1977-06-01), Rogers
patent: 4166610 (1979-09-01), Yamazaki et al.
patent: 4191598 (1980-03-01), Conybear et al.
patent: 4232852 (1980-11-01), Limque et al.
patent: 4249965 (1981-02-01), Schultz
patent: 4386973 (1983-06-01), Kawka et al.
patent: 4783575 (1988-11-01), Schmidt et al.
patent: 5093571 (1992-03-01), Inomata et al.
patent: 5127967 (1992-07-01), Verhoff et al.
patent: 5205873 (1993-04-01), Faure et al.
patent: 5224857 (1993-07-01), Schultz et al.
patent: 5228850 (1993-07-01), Hoetzl et al.
patent: 5528032 (1996-06-01), Uchiyama
patent: 5593571 (1997-01-01), Heyse et al.
patent: 5702540 (1997-12-01), Kubota
patent: 6187111 (2001-02-01), Waka et al.
patent: 6237575 (2001-05-01), Lampert et al.
patent: 6258179 (2001-07-01), Takayama et al.
patent: 6283749 (2001-09-01), Bernard, Jr. et al.
patent: 6366355 (2002-04-01), deGroot et al.
patent: 2003/0020214 (2003-01-01), Poor et al.
A.J. Derosset and C.V. Berger, “Thermal and catalytic Decomposition of Hydrocarbons,” Universal Oil Products Co. Des Planes, IL, an I/EC Unit Process Review, Industrial and Engineering chemistry, vol. 53, No. 8, Aug. 1961, pp. 680-682.
Michael Lohrmann and Winfried Grafen, Ipsen International GmbH, Kleve, Germany, “New Wrinkles in Low-Pressure Carburizing”, Heat Treating Progress, Feb./Mar. 2001, pp. 47-51.
Piotr Kula, Institute of Material Science & Engineering, Josef Olejnik, Seco/Warwick (Poland) Ltd. Janusz Kowalski, Seco/Warwick Corp.“New Vacuum Carburizing Technology,” Heat Treating Progress, Feb./Mar. 2001 pp. 57-60.
Barbee Gary W.
Brug James E.
Poor Ralph P.
Verhoff Stephen H.
Kastler Scott
MacMillan Sobanski & Todd LLC
Surface Combustion, Inc.
LandOfFree
Vacuum furnace for carburizing with hydrocarbons does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Vacuum furnace for carburizing with hydrocarbons, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Vacuum furnace for carburizing with hydrocarbons will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3750565