US4220445A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid bed furnace and cover assembly for use thereon
Assignee: Fennell Corp
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Filing: 1978-11-06
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Granted: 1980-09-02
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Expires: 1998-11-06
Abstract
Abstract The disclosure relates to an improved fluid bed furnace which includes a new and improved cover assembly and which is of the type including a fluid bed including a material which fluidizes upon being subjected to a flow of a gas mixture therethrough and a burner for distributing a gas mixture at an elevated temperature through the fluid bed material for fluidizing and agitating the fluid bed material. The cover assembly provides both exhaustion of the heated gas mixture from the furnace fluid bed and confinement of the agitated fluid bed material within the fluid bed. The cover assembly includes a hollow cap member having a bottom, a top, and an inner wall surface, a first aperture in the bottom communicating with the furnace fluid bed, and a second aperture in the top, and baffle means disposed within the hollow cap member between the first and second apertures and having an outer periphery spaced from the cap member inner wall surface but which is greater in dimension than the second aperture forming a space between the baffle means periphery and the cap member inner wall surface for exhausting the heated gas mixture from the fluid bed and forming a barrier for trapping the agitated fluid bed material within the fluid bed.
Inventors
- 👤 William L. James
- 👤 Hans J. Staudenmaier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:15
CPC Classifications
C; C21; C21D; C21D1/00; C21D1/34; C21D1/53; F; F27; F27B; F27B15/00
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
192 words
A cover assembly for use in a fluid bed furnace of the type including a fluid bed having a material which fluidizes upon being subjected to a sufficient flow of gas and means for distributing a gas mixture at an elevated temperature through the fluid bed material for fluidizing and agitating the fluid bed material, said cover assembly providing both exhaustion of the heated gas mixture from the furnace and confinement of the agitated fluid bed material within the fluid bed comprising: hollow cap means having a bottom, a top, and an inner wall surface, a first aperture in said bottom communicating with the furnace fluid bed, and a second aperture in said top; and baffle means disposed within said hollow cap means between said first and second apertures and having an outer periphery spaced from said cap means inner wall surface and greater in dimension than said second aperture forming a space between said baffle means periphery and said cap means inner wall surface through which the heated gas mixture is exhausted from the fluid bed and forming a barrier for trapping the agitated fluid bed material within the fluid bed.
Claim 2
Dependent Claim
192 words
A cover assembly for use in a fluid bed furnace of the type including a fluid bed having a material which fluidizes upon being subjected to a sufficient flow of gas and means for distributing a gas mixture at an elevated temperature through the fluid bed material for fluidizing and agitating the fluid bed material, said cover assembly providing both exhaustion of the heated gas mixture from the furnace and confinement of the agitated fluid bed material within the fluid bed comprising: hollow cap means having a bottom, a top, and an inner wall surface, a first aperture in said bottom communicating with the furnace fluid bed, and a second aperture in said top; and baffle means disposed within said hollow cap means between said first and second apertures and having an outer periphery spaced from said cap means inner wall surface and greater in dimension than said second aperture forming a space between said baffle means periphery and said cap means inner wall surface through which the heated gas mixture is exhausted from the fluid bed and forming a barrier for trapping the agitated fluid bed material within the fluid bed.
Claim 3
Dependent Claim
53 words
A cover assembly as defined in claim 1 wherein said cap means further includes pivot means hingedly connecting said cap means to said furnace to allow said cap means to be radially displaced about said pivot means to afford the place ment of components to be heat treated into the furnace fluid bed.
Claim 4
Dependent Claim
31 words
A cover assembly as defined in claim 2 wherein said cap means bottom is slightly spaced from the furnace to provide clearance for the pivoting of said cap means relative thereto.
Claim 5
Dependent Claim
43 words
A cover assembly as defined in claim 1 wherein said cap inner wall surface includes an inclined inner surface portion and wherein said baffle means outer periphery includes an outer surface portion inclined in correspondence to said cap means inclined inner surface portion.
Claim 6
Dependent Claim
69 words
A cover assembly as defined in claim 4 wherein the fluid bed is generally cylindrical in shape, wherein said cap means is correspondingly cylindrical in shape, wherein said cap means inner surface and said baffle means outer surface form annular surfaces and wherein said space between said cap means inner surface and said baffle means outer periphery comprises an annular passage for the exhaustion of the heated gas mixture.
Claim 7
Dependent Claim
180 words
A cover assembly for use in a fluid bed furnace of the type which includes a fluid bed containing particulate material which fluidizes upon being subject to flowing gases and means for distributing a heated gas mixture through the fluid bed for fluidizing and agitating the fluid bed material, said cover assembly providing both exhaustion of the heated gas mixture from the furnace and entrapment of the agitated fluid bed particles within the fluid bed comprising: a hollow cylindrical cap member having a bottom, a top, and an inner annular surface, a first circular aperture in said bottom communicating with the furnace fluid bed, and a second circular aperture in said top; and a cylindrical baffle member co-axially disposed within said cap member between said first and second apertures and having a smaller diameter dimension than said cap inner annular surface but greater in diameter dimension than said second aperture forming an annular space through which the heated gas mixture is exhausted from the fluid bed and forming a barrier for trapping the agitated fluidized particles within the fluid bed.
Claim 8
Dependent Claim
180 words
A cover assembly for use in a fluid bed furnace of the type which includes a fluid bed containing particulate material which fluidizes upon being subject to flowing gases and means for distributing a heated gas mixture through the fluid bed for fluidizing and agitating the fluid bed material, said cover assembly providing both exhaustion of the heated gas mixture from the furnace and entrapment of the agitated fluid bed particles within the fluid bed comprising: a hollow cylindrical cap member having a bottom, a top, and an inner annular surface, a first circular aperture in said bottom communicating with the furnace fluid bed, and a second circular aperture in said top; and a cylindrical baffle member co-axially disposed within said cap member between said first and second apertures and having a smaller diameter dimension than said cap inner annular surface but greater in diameter dimension than said second aperture forming an annular space through which the heated gas mixture is exhausted from the fluid bed and forming a barrier for trapping the agitated fluidized particles within the fluid bed.
Claim 9
Dependent Claim
49 words
A cover assembly as defined in claim 6 wherein said cap inner annular surface includes a diverging surface portion diverging from said bottom to said top, and wherein said baffle member includes an outer annular surface diverging in substantially parallel correspondence with said cap member diverging inner surface portion.
Claim 10
Dependent Claim
160 words
A fluid bed furnace comprising a fluid bed including a material which fluidizes upon being subjected to a sufficient flow of gas; means for distributing a gas mixture at an elevated temperature through the fluid bed material for fluidizing and agitating the fluid bed material; and a cover assembly including a hollow cap means having a bottom, a top, and an inner wall surface, a first aperture in said bottom communicating with the furnace fluid bed, and a second aperture in said top, and baffle means disposed within said hollow cap means between said first and second apertures and having an outer periphery spaced from said cap means inner wall surface and greater in dimension than said second aperture forming a space between said baffle means periphery and said cap means inner wall surface through which the gas mixture is exhausted from the fluid bed and forming a barrier for trapping the agitated fluid bed material within said fluid bed.
Claim 11
Dependent Claim
160 words
A fluid bed furnace comprising a fluid bed including a material which fluidizes upon being subjected to a sufficient flow of gas; means for distributing a gas mixture at an elevated temperature through the fluid bed material for fluidizing and agitating the fluid bed material; and a cover assembly including a hollow cap means having a bottom, a top, and an inner wall surface, a first aperture in said bottom communicating with the furnace fluid bed, and a second aperture in said top, and baffle means disposed within said hollow cap means between said first and second apertures and having an outer periphery spaced from said cap means inner wall surface and greater in dimension than said second aperture forming a space between said baffle means periphery and said cap means inner wall surface through which the gas mixture is exhausted from the fluid bed and forming a barrier for trapping the agitated fluid bed material within said fluid bed.
Claim 12
Dependent Claim
44 words
A fluid bed furnace as defined in claim 8 wherein said cap means and said fluid bed are hingedly connected for pivoting said cap means relative to said fluid bed to afford the placement of components to be heat treated into said fluid bed.
Claim 13
Dependent Claim
32 words
A fluid bed furnace as defined in claim 9 wherein said cap means bottom is slightly spaced from the fluid bed to provide clearance for pivoting of said cap means relative thereto.
Claim 14
Dependent Claim
44 words
A fluid bed furnace as defined in claim 8 wherein said cap inner wall surface includes an inclined inner surface portion and wherein said baffle means outer periphery includes an outer surface portion inclined in correspondence to said cap means inclined inner surface portion.
Claim 15
Dependent Claim
69 words
A fluid bed furnace as defined in claim 11 wherein said fluid bed is generally cylindrical in shape, wherein said cap means is correspondingly cylindrical in shape, wherein said cap means inner surface and said baffle means outer surface form annular surfaces and wherein said space between said cap means inner surface and said baffle means outer periphery comprise an annular passage for the exhaustion of heated gas mixture.
Claim 16
Dependent Claim
145 words
A fluid bed furnace comprising a fluid bed containing particulate material which fluidizes upon being subjected to fluidizing gases; means for distributing a heated gas mixture through said fluid bed for fluidizing and agitating the fluid bed particulate material; and a cover assembly including a hollow cylindrical cap member having a bottom, a top, and an inner annular surface, a first circular aperture in said bottom communicating with said fluid bed, and a second circular aperture in said top, and a cylindrical baffle member co-axially disposed within said cap member between said first and second apertures and having a smaller diameter dimension than said cap inner annular surface but greater in diameter dimension than said second aperture forming an annular space for exhausting the heated gas mixture from said fluid bed and forming a barrier for trapping the agitated fluidized particles within said fluid bed.
Claim 17
Dependent Claim
145 words
A fluid bed furnace comprising a fluid bed containing particulate material which fluidizes upon being subjected to fluidizing gases; means for distributing a heated gas mixture through said fluid bed for fluidizing and agitating the fluid bed particulate material; and a cover assembly including a hollow cylindrical cap member having a bottom, a top, and an inner annular surface, a first circular aperture in said bottom communicating with said fluid bed, and a second circular aperture in said top, and a cylindrical baffle member co-axially disposed within said cap member between said first and second apertures and having a smaller diameter dimension than said cap inner annular surface but greater in diameter dimension than said second aperture forming an annular space for exhausting the heated gas mixture from said fluid bed and forming a barrier for trapping the agitated fluidized particles within said fluid bed.
Claim 18
Dependent Claim
50 words
A fluid bed furnace as defined in claim 13 wherein said cap inner annular surface includes a diverging surface portion diverging from said bottom to said top, and wherein said baffle member includes an outer annular surface diverging in substantially parallel correspondence with said cap member diverging inner surface portion.
Claim 19
Dependent Claim
46 words
A fluid bed furnace as defined in claim 14 further comprising pivot means hingedly connecting said cap member to said fluid bed for pivoting said cap member relative to said fluid bed to afford the placement of components to be heat treated within said fluid bed.
Claim 20
Dependent Claim
51 words
A fluid bed furnace as defined in claim 15 wherein said pivot means comprises a cylindrical column carried by said fluid bed, a hollow cylindrical member carried by said cap member having a greater diameter than said cylindrical column, and wherein said cylindrical column is received by said hollow cylindrical member.
Claim 21
Dependent Claim
56 words
A fluid bed furnace as defined in claim 16 wherein said cap member bottom is slightly spaced from said fluid bed for providing clearance for the relative pivotal movement of said cap member, and wherein said hollow cylindrical member includes means for adjusting the spacing between said bottom of said cap member and said fluid bed.
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) | 1983-09-02 | 1984-03-03 | 1984-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-09-02 | 1988-03-03 | 1988-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-09-02 | 1992-03-03 | 1992-09-02 | $7700.00 | Window Closed / Lapsed |