US3763796A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Furnace wall construction
Assignee: Phillips Petroleum Co
•
Filing: 1972-02-28
•
Granted: 1973-10-09
•
Expires: 1992-02-28
Abstract
Abstract The upper surfaces of at least selected fire bricks in the inner lining wall of a furnace are grooved to receive the horizontal elements of a hook member, the grooves being of sufficiently greater depth than the thickness of the hook element to permit thermal expansion of the fire brick in the vertical direction without causing significant bending forces on the hook element.
Inventors
- 👤 C Venable
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:30
CPC Classifications
F; F27; F27D; F27D1/00; F27D1/14
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
335 words
A furnace wall construction comprising an outer wall, a series of individual insulating fire bricks laid upon one another in a plurality of courses adjacent to said outer wall to form an inner lining wall, a plurality of hook members rigidly secured relative to said outer wall, each hook member having at least one horizontal leg extending inwardly from said outer wall into a horizontal joint between a respective first one of said insulating fire bricks and another one of said insulating fire bricks superimposed on said respective first one of said insulating fire bricks, a hook leg extending downwardly from the inner end of said horizontal leg into a hole in said respective first one of said insulating fire bricks to at least substantially prevent lateral motion of said respective first one of said insulating fire bricks toward or away from said outer wall, said respective one of the insulating fire bricks being provided with a groove in the upper surface thereof parallel to and immediately under said horizontal leg, said groove being wider than said horizontal leg and of sufficient depth to provide an air space below said horizontal leg, said air space being of sufficient height to permit vertical expansion of said lining wall relative to said outer wall without effecting any significant bending force upon the horizontal legs of said plurality of hook members, the lower end of each of the hook legs being sufficiently pointed to permit the hook leg to be forced into the respective first one of said insulating fire bricks during fabrication of said furnace wall construction to form said hole without cracking the respective first one of said insulating fire bricks and to permit the hook leg to penetrate deeper into the respective first one of said insulating fire bricks without cracking the respective first one of said insulating fire bricks as said respective first one of said insulating fire bricks is raised by vertical expansion as the furnace is heated up to its operating temperature.
Claim 2
Dependent Claim
335 words
A furnace wall construction comprising an outer wall, a series of individual insulating fire bricks laid upon one another in a plurality of courses adjacent to said outer wall to form an inner lining wall, a plurality of hook members rigidly secured relative to said outer wall, each hook member having at least one horizontal leg extending inwardly from said outer wall into a horizontal joint between a respective first one of said insulating fire bricks and another one of said insulating fire bricks superimposed on said respective first one of said insulating fire bricks, a hook leg extending downwardly from the inner end of said horizontal leg into a hole in said respective first one of said insulating fire bricks to at least substantially prevent lateral motion of said respective first one of said insulating fire bricks toward or away from said outer wall, said respective one of the insulating fire bricks being provided with a groove in the upper surface thereof parallel to and immediately under said horizontal leg, said groove being wider than said horizontal leg and of sufficient depth to provide an air space below said horizontal leg, said air space being of sufficient height to permit vertical expansion of said lining wall relative to said outer wall without effecting any significant bending force upon the horizontal legs of said plurality of hook members, the lower end of each of the hook legs being sufficiently pointed to permit the hook leg to be forced into the respective first one of said insulating fire bricks during fabrication of said furnace wall construction to form said hole without cracking the respective first one of said insulating fire bricks and to permit the hook leg to penetrate deeper into the respective first one of said insulating fire bricks without cracking the respective first one of said insulating fire bricks as said respective first one of said insulating fire bricks is raised by vertical expansion as the furnace is heated up to its operating temperature.
Claim 3
Dependent Claim
22 words
A furnace wall construction in accordance with claim 1 wherein said insulating fire brick contains less than 2 weight percent calcium oxide.
Claim 4
Dependent Claim
76 words
A furnace wall construction in accordance with claim 1 wherein said insulating fire bricks are joined to one another by a layer of refractory mortar, and wherein said air space is filled with a combustible filler which holds the horizontal leg in the desired position and prevents the entry of mortar into said air space during construction of said liner, said filler being disintegratable at a temperature achieved by the lining during operation of the furnace.
Claim 5
Dependent Claim
61 words
A furnace wall construction in accordance with claim 1 wherein said outer wall comprises a steel shell and a cast layer of a refractory material between said steel shell and said lining wall, said cast layer having a significantly higher degree of impermeability to combustion gas than said inner lining wall to thereby minimize chemical deterioration of the furnace wall construction.
Claim 6
Dependent Claim
28 words
A furnace wall construction in accordance with claim 4 wherein said refractory material is selected from the group consisting of hydraulic-setting castable refractories, plastic refractories, and gunning mixes.
Claim 7
Dependent Claim
91 words
A furnace wall construction in accordance with claim 5 wherein each of said hook members has two horizontal leg members connected at their outer ends in a generally V-shape, wherein the hook members are positioned in a plurality of sets, each set comprising at least two vertically aligned hook members, a corresponding plurality of vertical support rods, Each vertical support rod being positioned between the horizontal legs of the hook members in a respective set and spaced from said lining, and means for securing the support rods to said steel shell.
Claim 8
Dependent Claim
292 words
A furnace wall construction comprising an outer wall, a series of individual insulating fire bricks laid upon one another in a plurality of courses adjacent to said outer wall to form an inner lining wall, a plurality of L-shaped rods located between said outer wall and said inner lining wall, each of said rods having a horizontal leg and a vertical leg, the end of the horizontal leg opposite the vertical leg being attached to said outer wall, a plurality of hook members, each hook member having at least two horizontal legs which are joined at the outer ends thereof in a generally V-shape configuration and which extend from a point adjacent said outer wall inwardly on either side of the vertical leg of a respective one of said rods into a horizontal joint between a respective first one of said insulating fire bricks and another one of said insulating fire bricks superimposed on said respective first one of said insulating fire bricks, at least one horizontal leg of each said hook member having a hook leg extending downwardly from the inner end thereof into a hole in said respective first one of said insulating fire bricks, the space between said outer wall and said inner lining wall being at least substantially filled with an insulating refractory material except about the vertical leg of each of said rods and that portion of each hook member which extends outwardly from said inner lining wall toward said outer wall so that relative vertical movement of each hook member along the vertical leg of the respective rod is not hindered, whereby lateral motion of said respective first one of said insulating fire bricks toward or away from said outer wall is at least substantially prevented.
Claim 9
Dependent Claim
292 words
A furnace wall construction comprising an outer wall, a series of individual insulating fire bricks laid upon one another in a plurality of courses adjacent to said outer wall to form an inner lining wall, a plurality of L-shaped rods located between said outer wall and said inner lining wall, each of said rods having a horizontal leg and a vertical leg, the end of the horizontal leg opposite the vertical leg being attached to said outer wall, a plurality of hook members, each hook member having at least two horizontal legs which are joined at the outer ends thereof in a generally V-shape configuration and which extend from a point adjacent said outer wall inwardly on either side of the vertical leg of a respective one of said rods into a horizontal joint between a respective first one of said insulating fire bricks and another one of said insulating fire bricks superimposed on said respective first one of said insulating fire bricks, at least one horizontal leg of each said hook member having a hook leg extending downwardly from the inner end thereof into a hole in said respective first one of said insulating fire bricks, the space between said outer wall and said inner lining wall being at least substantially filled with an insulating refractory material except about the vertical leg of each of said rods and that portion of each hook member which extends outwardly from said inner lining wall toward said outer wall so that relative vertical movement of each hook member along the vertical leg of the respective rod is not hindered, whereby lateral motion of said respective first one of said insulating fire bricks toward or away from said outer wall is at least substantially prevented.
Claim 10
Independent Claim
373 words
A method of fabricating a furnace wall construction comprising an outer wall, a series of individual insulating fire bricks laid upon one another in a plurality of courses adjacent to said outer wall to form an inner lining wall, a plurality of L-shaped rods located between said outer wall and said inner lining wall, each of said rods having a horizontal leg and a vertical leg, the end of the horizontal leg opposite the vertical leg being attached to said outer wall, a plurality of hook members, each hook member having at least two horizontal legs which are joined at the outer ends thereof in a generally V-shape configuration and which extend from a point adjacent said outer wall inwardly on either side of the vertical leg of a respective one of said rods into a horizontal joint between a respective first one of said insulating fire bricks and another one of said insulating fire bricks superimposed on said respective first one of said insulating fire bricks, at least one horizontal leg of each said hook member having a hook leg extending downwardly from the inner end thereof into a hole in said respective first one of said insulating fire bricks, the space between said outer wall and said inner lining wall being at least substantially filled with an insulating refractory material except about the vertical leg of each of said rods and that portion of each hook member which extends outwardly from said inner lining wall toward said outer wall so that relative vertical movement of each hook member along the vertical leg of the respective rod is not hindered, whereby lateral motion of said respective first one of said insulating fire bricks toward or away from said outer wall is at least substantially prevented; which comprises, in sequence, attaching said L-shaped rods to said outer wall, covering the vertical leg of each of said rods with a respective one of a corresponding plurality of removable sleeves having an annular thickness at least slightly greater than the horizontal thickness of said hook members at the outer end thereof, applying said insulating refractory material to said ouTer wall, removing the sleeves from the vertical legs, and installing said bricks and said hook members.
Claim 11
Independent Claim
373 words
A method of fabricating a furnace wall construction comprising an outer wall, a series of individual insulating fire bricks laid upon one another in a plurality of courses adjacent to said outer wall to form an inner lining wall, a plurality of L-shaped rods located between said outer wall and said inner lining wall, each of said rods having a horizontal leg and a vertical leg, the end of the horizontal leg opposite the vertical leg being attached to said outer wall, a plurality of hook members, each hook member having at least two horizontal legs which are joined at the outer ends thereof in a generally V-shape configuration and which extend from a point adjacent said outer wall inwardly on either side of the vertical leg of a respective one of said rods into a horizontal joint between a respective first one of said insulating fire bricks and another one of said insulating fire bricks superimposed on said respective first one of said insulating fire bricks, at least one horizontal leg of each said hook member having a hook leg extending downwardly from the inner end thereof into a hole in said respective first one of said insulating fire bricks, the space between said outer wall and said inner lining wall being at least substantially filled with an insulating refractory material except about the vertical leg of each of said rods and that portion of each hook member which extends outwardly from said inner lining wall toward said outer wall so that relative vertical movement of each hook member along the vertical leg of the respective rod is not hindered, whereby lateral motion of said respective first one of said insulating fire bricks toward or away from said outer wall is at least substantially prevented; which comprises, in sequence, attaching said L-shaped rods to said outer wall, covering the vertical leg of each of said rods with a respective one of a corresponding plurality of removable sleeves having an annular thickness at least slightly greater than the horizontal thickness of said hook members at the outer end thereof, applying said insulating refractory material to said ouTer wall, removing the sleeves from the vertical legs, and installing said bricks and said hook members.
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) | 1976-10-08 | 1977-04-09 | 1977-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-08 | 1981-04-09 | 1981-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-08 | 1985-04-09 | 1985-10-09 | $7700.00 | Window Closed / Lapsed |