Patent US3584852A successfully refreshed from Google Patents.
US3584852A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat-treat furnace
Assignee: SUPER STEEL TREATING CO
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Filing: 1969-08-22
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Granted: 1971-06-15
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Expires: 1989-08-22
Abstract
Abstract A heat-treat furnace having at least one radiator channel along a wall having heat radiators therein with a blower exhausting air into the channel horizontally at one end of the channel and with the channel exhausting air horizontally into the furnace interior at the other end of the channel; the blower suction side drawing air horizontally from the furnace interior so that heated air is recirculated in the furnace interior horizontally to effect homogenous heating of metal items in the furnace from top-tobottom; side-to-side, and end-to-end by air recirculation in horizontal travel to oppose and reduce gravitational and density influences toward stratification.
Inventors
- 👤 Claude H Leland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:22
CPC Classifications
C; C21; C21D; C21D9/00; C21D9/0043
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
335 words
A furnace for heat treating such as annealing, normalizing, and stress-relieving metal items; said furnace having a structure and operation comprising, a floor for supporting metal items to be treated; first and second sidewalls, first and second end walls rising from said floor, a ceiling wall on said sidewalls and end walls, and a door in one said wall for placing and removing metal items in said furnace, a baffle wall lying parallel to and relatively closely spaced from said first sidewall; said baffle wall leading from said first end wall and terminating short of said second end wall; said baffle wall and said first sidewall creating a radiator channel having an open end spaced from said second end wall, heat radiators between said first sidewall and said baffle wall in said radiator channel, a blower having a suction side and an exhaust side at said first end wall, an air return port in said first end wall leading from the furnace interior to said blower suction side, an air delivery port in said first end wall leading from said blower exhaust side to said radiator channel between said baffle wall and said first sidewall; said blower thereby drawing air horizontally from the interior of said furnace walls and delivering the air horizontally to said radiator channel to pass the air horizontally over said radiators to heat the air; said radiator channel emitting the heated air horizontally to the interior of said furnace adjacent said second end wall at a point remote from said return port in said first end wall; the air in moving from said radiator channel to said return port under influence of said blower passing horizontally over the metal items to impart heat to the metal items; said blower recirculating the air horizontally in the furnace to effect homogeneous heating of the metal items from top-tobottom, from side-to-side, and from end-to-end by horizontally recirculating heated air relative to the metal items to oppose and reduce gravitational and density influences toward stratification.
Claim 2
Dependent Claim
335 words
A furnace for heat treating such as annealing, normalizing, and stress-relieving metal items; said furnace having a structure and operation comprising, a floor for supporting metal items to be treated; first and second sidewalls, first and second end walls rising from said floor, a ceiling wall on said sidewalls and end walls, and a door in one said wall for placing and removing metal items in said furnace, a baffle wall lying parallel to and relatively closely spaced from said first sidewall; said baffle wall leading from said first end wall and terminating short of said second end wall; said baffle wall and said first sidewall creating a radiator channel having an open end spaced from said second end wall, heat radiators between said first sidewall and said baffle wall in said radiator channel, a blower having a suction side and an exhaust side at said first end wall, an air return port in said first end wall leading from the furnace interior to said blower suction side, an air delivery port in said first end wall leading from said blower exhaust side to said radiator channel between said baffle wall and said first sidewall; said blower thereby drawing air horizontally from the interior of said furnace walls and delivering the air horizontally to said radiator channel to pass the air horizontally over said radiators to heat the air; said radiator channel emitting the heated air horizontally to the interior of said furnace adjacent said second end wall at a point remote from said return port in said first end wall; the air in moving from said radiator channel to said return port under influence of said blower passing horizontally over the metal items to impart heat to the metal items; said blower recirculating the air horizontally in the furnace to effect homogeneous heating of the metal items from top-tobottom, from side-to-side, and from end-to-end by horizontally recirculating heated air relative to the metal items to oppose and reduce gravitational and density influences toward stratification.
Claim 3
Dependent Claim
59 words
In a furnace as set forth in claim 1, a second baffle wall lying parallel to and relatively closely spaced from said second sidewall creating a second radiator channel therebetween; heat radiators in said second radiator channel; and a second air delivery port in said first end wall leading from said blower exhaust side to said second radiator channel.
Claim 4
Dependent Claim
93 words
In a furnace as set forth in claim 1, a second baffle wall lying parallel to and relatively closely spaced from said second sidewall creating a second radiator channel therebetween; heat radiators in said second radiator channel, a second air delivery port in said first end wall leading to said second radiator channel, a second air return port in said first end wall leading from said furnace interior, and a second blower having a suction side communicating with said second air return port and a exhaust side communicating with said second delivery port.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-14 | 1974-12-14 | 1975-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-14 | 1978-12-14 | 1979-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-14 | 1982-12-14 | 1983-06-15 | $7700.00 | Window Closed / Lapsed |