Metallurgical apparatus – Means treating solid metal – By contact with gas
Reexamination Certificate
2007-08-07
2007-08-07
Kastler, Scott (Department: 1742)
Metallurgical apparatus
Means treating solid metal
By contact with gas
C266S262000, C266S263000
Reexamination Certificate
active
10806773
ABSTRACT:
The invention describes a hood-type annealing furnace, especially for steel strip or wire bunches, with an annealing base (1) for receiving the material (7) to be annealed, a protective hood (8) which is placed on the furnace in a gas-tight manner, a radial blower (2) which is held in the annealing base (1) and comprises a blade wheel (3) and a guide apparatus (5) enclosing the blade wheel (3) for circulating a protective gas in the protective hood (8), a heat exchanger (11) for cooling the protective gas, which heat exchanger (11) is connected on the input side via a flow conduit (13) with the pressure side of the radial blower (2) and opens on the output side in an annular gap (12) between the guide apparatus (5) and the protective hood (8), and a deflection device which is axially displaceable into the pressure-side flow path of the radial blower (2) for the optional connection to the radial blower (2) of the flow conduit (13) which leads to the heat exchanger (11). In order to provide simple construction conditions it is proposed that the protective hood (8) is held in a gas-tight manner via an annular flange (9), that the heat exchanger (11) is disposed below the annular flange (9), that the flow conduit (13) consists of an annular conduit (14) starting from the outer circumference of the guide apparatus (5) and being concentric to the annular gap (12), and that the deflection device is arranged as an annular deflection slide (18) which encloses the guide apparatus (5) on the outside.
REFERENCES:
patent: 3071500 (1963-01-01), Corbett et al.
patent: 5730930 (1998-03-01), Velten et al.
patent: 2228215 (1973-07-01), None
patent: 409235619 (1997-09-01), None
English Language Translation of JP409235619A, Sep. 1997.
Ebner Peter
Lochner Heribert
Collard & Roe P.C.
Ebner Industrieofenbau Gesellschaft m.b.H.
Kastler Scott
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