US3716222A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heating furnace
Assignee: RUST FURNACE CO
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Filing: 1971-02-23
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Granted: 1973-02-13
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Expires: 1991-02-23
Abstract
Abstract A heating furnace comprising a hearth which includes charge supporting members each comprised of an upper tubular member and a lower tubular member connected together by an intermediate tubular member to form a rigid, water cooled truss. The furnace may be divided into a series of heating zones by top and bottom partitions from which the furnace is end fired. In one embodiment a first series of trusses is movable longitudinally while a second series of trusses is alternately movable vertically to convey a charge through the furnace. Alternatively, certain of the trusses may be fixedly mounted, while others are mounted for movement both longitudinally and vertically in the furnace. The trusses are supported at each bottom partition with the movable trusses being mounted on a carriage which is movable in and forms a traversing seal over a slot in the bottom partition. A reverse fired bottom soaking zone and a downtake flue adjacent the discharge end of the furnace insure heating of the charge by hot gases until discharge. Another embodiment includes charge supporting members movable both longitudinally and vertically in the furnace and constructed of two sections connected together to permit independent relative vertical movement with respect to each other to cause closely packed charges on the first section to become spaced as they move to the second section. A downtake flue positioned in a preheat zone underneath the first section draws hot gases over the top of the charges on the first section towards the charge end of the furnace and back underneath the charges to heat the bottom.
Inventors
- 👤 R Anderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:15
CPC Classifications
F; F27; F27D; F27D3/00; F27D3/02; F27D3/022; F27B; F27B9/00; F27B9/14; F27B9/20; F27B9/201; F27B9/202; F27B9/207
Claims Analysis
Total Claims: 33
Claim 1
Independent Claim
98 words
A heating furnace comprising, means defining a heating zone, a charge supporting hearth, said hearth including charge supporting members positioned substantially completely within said heating zone, each said charge supporting member comprising an upper tubular member, a lower tubular member and at least one intermediate tubular member extending between and alternately connected to said upper and lower tubular members in serpentine arrangement to form a rigid charge supporting truss having a rigid open framework throughout substantially its entire length, means for supporting each of said charge supporting members, and means for cooling each of said charge supporting members.
Claim 2
Dependent Claim
98 words
A heating furnace comprising, means defining a heating zone, a charge supporting hearth, said hearth including charge supporting members positioned substantially completely within said heating zone, each said charge supporting member comprising an upper tubular member, a lower tubular member and at least one intermediate tubular member extending between and alternately connected to said upper and lower tubular members in serpentine arrangement to form a rigid charge supporting truss having a rigid open framework throughout substantially its entire length, means for supporting each of said charge supporting members, and means for cooling each of said charge supporting members.
Claim 3
Dependent Claim
98 words
A heating furnace comprising, means defining a heating zone, a charge supporting hearth, said hearth including charge supporting members positioned substantially completely within said heating zone, each said charge supporting member comprising an upper tubular member, a lower tubular member and at least one intermediate tubular member extending between and alternately connected to said upper and lower tubular members in serpentine arrangement to form a rigid charge supporting truss having a rigid open framework throughout substantially its entire length, means for supporting each of said charge supporting members, and means for cooling each of said charge supporting members.
Claim 4
Dependent Claim
98 words
A heating furnace comprising, means defining a heating zone, a charge supporting hearth, said hearth including charge supporting members positioned substantially completely within said heating zone, each said charge supporting member comprising an upper tubular member, a lower tubular member and at least one intermediate tubular member extending between and alternately connected to said upper and lower tubular members in serpentine arrangement to form a rigid charge supporting truss having a rigid open framework throughout substantially its entire length, means for supporting each of said charge supporting members, and means for cooling each of said charge supporting members.
Claim 5
Dependent Claim
55 words
A heating furnace as defined in claim 1, wherein said means for supporting each of said charge supporting members includes a plurality of spaced bottom partitions extending upwardly from the bottom of the furnace to define a series of bottom zones, said furnace further including heating means in at least one of said bottom zones.
Claim 6
Dependent Claim
35 words
A heating furnace as defined in claim 1, wherein at least certain of said charge supporting members are movable both longitudinally endwise of the furnace and vertically in the furnace to convey a charge therethrough.
Claim 7
Dependent Claim
42 words
A heating furnace as defined in claim 3, wherein said means for supporting said charge supporting members includes a plurality of bottom partitions extending upwardly from the bottom of said furnace and carriages on said partitions movable longitudinally endwise of the furnace.
Claim 8
Dependent Claim
35 words
A heating furnace as defined in claim 4, wherein each carriage is movable in a slot in one of said partitions, said carriage overlapping the edges of said blot to form a traversing seal therewith.
Claim 9
Dependent Claim
32 words
A heating furnace as defined in claim 4, which includes heating means mounted in at least some of said partitions underneath said charge supporting members for directing heat endwise of the furnace.
Claim 10
Dependent Claim
75 words
A heating furnace as defined in claim 1, wherein a first series of said charge supporting members is mounted for longitudinal movement endwise of the furnace, a second series of said charge supporting members is mounted for vertical movement in the furnace, and means are provided for effecting longitudinal movement of said first series of said members and alternating vertical movement of said second series of said members to convey a charge through said zone.
Claim 11
Dependent Claim
42 words
A heating furnace as defined in claim 7, wherein said means for supporting said charge supporting members includes a plurality of bottom partitions extending upwardly from the bottom of said furnace and carriages on said partitions movable longitudinally endwise of the furnace.
Claim 12
Dependent Claim
35 words
A heating furnace as defined in claim 8, wherein each carriage is movable in a slot in one of said partitions, said carriage overlapping the edges of said slot to form a traversing seal therewith.
Claim 13
Dependent Claim
32 words
A heating furnace as defined in claim 8, which includes heating means mounted in at least some of said partitions underneath said charge supporting members for directing heat endwise of the furnace.
Claim 14
Dependent Claim
185 words
A heating furnace comprising a plurality of spaced bottom partitions extending upwardly from the bottom of the furnace to define a series of bottom heating zones, a plurality of charge supporting members constituting a hearth spanning said partitions and mounted thereon, each of said charge supporting members comprising an upper tubular member, a lower tubular member, and an intermediate tubular member extending between and connected to said upper and lower tubular members to form i1 rigid charge supporting truss, a first series of said charge supporting members being mounted for longitudinal movement endwise of the furnace, a second series of said charge supporting members being mounted for vertical movement in the furnace, carriage means mounting said first series of charge supporting members on saId partitions, means for cooling each of said charge supporting members, heating means mounted in said partitions underneath said charge supporting members for directing heat endwise of the furnace, and means for effecting longitudinal movement of said first series of charge supporting members and alternating vertical movement of said second series of charge supporting members to convey a charge through the furnace.
Claim 15
Dependent Claim
185 words
A heating furnace comprising a plurality of spaced bottom partitions extending upwardly from the bottom of the furnace to define a series of bottom heating zones, a plurality of charge supporting members constituting a hearth spanning said partitions and mounted thereon, each of said charge supporting members comprising an upper tubular member, a lower tubular member, and an intermediate tubular member extending between and connected to said upper and lower tubular members to form i1 rigid charge supporting truss, a first series of said charge supporting members being mounted for longitudinal movement endwise of the furnace, a second series of said charge supporting members being mounted for vertical movement in the furnace, carriage means mounting said first series of charge supporting members on saId partitions, means for cooling each of said charge supporting members, heating means mounted in said partitions underneath said charge supporting members for directing heat endwise of the furnace, and means for effecting longitudinal movement of said first series of charge supporting members and alternating vertical movement of said second series of charge supporting members to convey a charge through the furnace.
Claim 16
Dependent Claim
34 words
A heating furnace as defined in claim 11, wherein said carriage means is movable in a slot in each said partition and overlaps the edges of said slot to form a traversing seal therewith.
Claim 17
Dependent Claim
20 words
A heating furnace as defined in claim 11, which includes rollers mounted in said partitions for supporting said carriage means.
Claim 18
Dependent Claim
15 words
A heating furnace as defined in claim 11 which includes means for cooling said carriage.
Claim 19
Dependent Claim
66 words
A heating furnace as defined in claim 11, which includes a discharge end, a bottom heating zone defined by said partitions adjacent said discharge end, heating means mounted in one of said partitions positioned to direct heat in the direction of travel of the charge in said bottom heating zone, and flue means adjacent said discharge end for collecting flue gas from said bottom heating zone.
Claim 20
Dependent Claim
167 words
A heating furnace comprising a plurality of spaced bottom partitions extending upwardly from the bottom of the furnace to define a series of bottom heating zones, a plurality of charge supporting members constituting a hearth spanning said partitions and mounted thereon, each of said charge supporting members comprising an upper tubular member, a lower tubular member, ad an intermediate tubular member extending between and connected to said upper and lower tubular members to form a rigid charge supporting truss, at least certain of said charge supporting members being mounted for movement both longitudinally endwise of the furnace and vertically in the furnace, carriage means mounting at least certain of said charge supporting members on said partitions, means for cooling each of said charge supporting members, heating means mounted in said partitions underneath said charge supporting members for directing heat endwise of the furnace, and means effecting both longitudinal and vertical movement of at least certain of said charge supporting members to convey a charge through the furnace.
Claim 21
Dependent Claim
167 words
A heating furnace comprising a plurality of spaced bottom partitions extending upwardly from the bottom of the furnace to define a series of bottom heating zones, a plurality of charge supporting members constituting a hearth spanning said partitions and mounted thereon, each of said charge supporting members comprising an upper tubular member, a lower tubular member, ad an intermediate tubular member extending between and connected to said upper and lower tubular members to form a rigid charge supporting truss, at least certain of said charge supporting members being mounted for movement both longitudinally endwise of the furnace and vertically in the furnace, carriage means mounting at least certain of said charge supporting members on said partitions, means for cooling each of said charge supporting members, heating means mounted in said partitions underneath said charge supporting members for directing heat endwise of the furnace, and means effecting both longitudinal and vertical movement of at least certain of said charge supporting members to convey a charge through the furnace.
Claim 22
Dependent Claim
34 words
A heating furnace as defined in claim 16, wherein said carriage means is movable in a slot in each said partition and overlaps the edges of said slot to form a traversing seal therewith.
Claim 23
Dependent Claim
20 words
A heating furnace as defined in claim 16, which includes rollers mounted in said partitions for supporting said carriage means.
Claim 24
Dependent Claim
15 words
A heating furnace as defined in claim 16, which includes means for cooling said carriage.
Claim 25
Dependent Claim
45 words
A heating furnace as defined in claim 16 wherein said charge supporting members mounted for movement both longitudinally and vertically in the furnace constitute a first series of charge supporting members and said furnace includes a second series of charge supporting members fixedly mounted therein.
Claim 26
Dependent Claim
66 words
A heating furnace as defined in claim 16, which includes a discharge end, a bottom heating zone defined by said partitions adjacent said discharge end, heating means mounted in one of said partitions positioned to direct heat in the direction of travel of the charge in said bottom heating zone, and flue means adjacent said discharge end for collecting flue gas from said bottom heating zone.
Claim 27
Dependent Claim
115 words
A heating furnace having a charge end and a discharge end, comprising a plurality of spaced bottom partitions extending upwardly from the bottom of the furnace to define a series of bottom heating zones, a plurality of charge supporting members constituting a hearth spanning said partitions and mounted thereon, a final bottom heating zone defined by said partitions adjacent the discharge end of the furnace, heating means mounted In one of said partitions underneath said charge supporting members in said final bottom heating zone and positioned to direct heat therethrough in the direction of travel of the charge, and flue means adjacent the discharge end for collecting waste gas from said final bottom heating zone.
Claim 28
Dependent Claim
115 words
A heating furnace having a charge end and a discharge end, comprising a plurality of spaced bottom partitions extending upwardly from the bottom of the furnace to define a series of bottom heating zones, a plurality of charge supporting members constituting a hearth spanning said partitions and mounted thereon, a final bottom heating zone defined by said partitions adjacent the discharge end of the furnace, heating means mounted In one of said partitions underneath said charge supporting members in said final bottom heating zone and positioned to direct heat therethrough in the direction of travel of the charge, and flue means adjacent the discharge end for collecting waste gas from said final bottom heating zone.
Claim 29
Dependent Claim
20 words
A heating furnace as defined in claim 22, which includes means for operating said flue means at a negative pressure.
Claim 30
Dependent Claim
37 words
A heating furnace as defined in claim 23, wherein said flue means is positioned between the discharge end of the furnace and said final bottom heating zone at a level below that of the charge supporting members.
Claim 31
Dependent Claim
169 words
A heating furnace comprising a charge supporting hearth, said hearth including a plurality of movable charge supporting members, each of said movable charge supporting members being comprised of a first section and a second section connected together at their inner ends and extending lengthwise of the furnace, said first and second sections being mounted for movement both longitudinally endwise of the furnace and vertically in the furnace, said first and second sections being connected together to permit independent relative vertical movement with respect to each other, said first section being comprised of an upper tubular member, a lower tubular member, and at least one intermediate tubular member extending between and connected to said upper and lower tubular members to form a rigid charge supporting truss, means for cooling said first section, and means for effecting both longitudinal movement of said first and second sections and independent relative vertical movement of said first and second sections with respect to each other to cause a charge to move through the furnace.
Claim 32
Dependent Claim
169 words
A heating furnace comprising a charge supporting hearth, said hearth including a plurality of movable charge supporting members, each of said movable charge supporting members being comprised of a first section and a second section connected together at their inner ends and extending lengthwise of the furnace, said first and second sections being mounted for movement both longitudinally endwise of the furnace and vertically in the furnace, said first and second sections being connected together to permit independent relative vertical movement with respect to each other, said first section being comprised of an upper tubular member, a lower tubular member, and at least one intermediate tubular member extending between and connected to said upper and lower tubular members to form a rigid charge supporting truss, means for cooling said first section, and means for effecting both longitudinal movement of said first and second sections and independent relative vertical movement of said first and second sections with respect to each other to cause a charge to move through the furnace.
Claim 33
Dependent Claim
59 words
A heating furnace as defined in claim 25, wherein an end portion of said first section is received in and is separately movable vertically in a slot in said second section to cause a plurality of charges packed together on said first section to become spaced as the charges are conveyed from said first section to said second section.
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) | 1976-02-13 | 1976-08-14 | 1977-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-13 | 1980-08-14 | 1981-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-13 | 1984-08-14 | 1985-02-13 | $7700.00 | Window Closed / Lapsed |