US3558111A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for controlling the flow of a fluidized material from a low pressure chamber to a high pressure chamber
Assignee: Barber Greene Co
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Filing: 1968-12-17
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Granted: 1971-01-26
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Expires: 1988-12-17
Abstract
Abstract A method and apparatus for treating material in a fluidized condition including a method and device for transferring material from a fluidized bed in a low-pressure chamber to a high-pressure chamber without disrupting the pressure differential therebetween. The transfer of the material is accomplished by a valve having a large end disposed in the low-pressure chamber and a restricted orifice extending into the high-pressure chamber so that a gaseous medium of the high-pressure chamber entering the orifice will be expanded to decrease its velocity and pressure to allow the passage of material from the low-pressure chamber into the high-pressure chamber.
Inventors
- 👤 Hazelton H Avery
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:21
CPC Classifications
B; B01; B01J; B01J8/00; B01J8/18; B01J8/24; B01J8/26; B01J8/28; B01J8/30
Claims Analysis
Total Claims: 29
Claim 1
Independent Claim
134 words
A material fluidizing apparatus comprising: a high-pressure chamber of gaseous medium; a low-pressure chamber of gaseous medium disposed above said high-pressure chamber; a grid means disposed between said chambers maintaining a pressure differential therebetween, and passing gaseous medium from said high-pressure chamber into the low-pressure chamber to create a fluidized bed of material contained therein adjacent an upper surface of said grid means; and a material transfer valve having a large open end and a small open end, said valve being mounted on said grid means with said large end projecting into said low-pressure chamber and said small end extending into said high-pressure chamber and positioned above any bed of material therein so that said valve transfers material from said low-pressure chamber to said highpressure chamber without any substantial disruption of the pressure differential.
Claim 2
Dependent Claim
134 words
A material fluidizing apparatus comprising: a high-pressure chamber of gaseous medium; a low-pressure chamber of gaseous medium disposed above said high-pressure chamber; a grid means disposed between said chambers maintaining a pressure differential therebetween, and passing gaseous medium from said high-pressure chamber into the low-pressure chamber to create a fluidized bed of material contained therein adjacent an upper surface of said grid means; and a material transfer valve having a large open end and a small open end, said valve being mounted on said grid means with said large end projecting into said low-pressure chamber and said small end extending into said high-pressure chamber and positioned above any bed of material therein so that said valve transfers material from said low-pressure chamber to said highpressure chamber without any substantial disruption of the pressure differential.
Claim 3
Dependent Claim
164 words
A material fluidizing apparatus comprising: a high-pressure chamber of gaseous medium; a low-pressure chamber of gaseous medium disposed above said high-pressure chamber; a grid means disposed between said chambers maintaining a pressure differential therebetween, and passing gaseous medium from said high-pressure chamber to said low-pressure chamber to create a fluidized bed of material contained in said low-pressure chamber adjacent an upper surface of said grid means; and a material transfer valve having a large open end and a small open end, said valve being mounted on said grid means with said large end disposed above said upper surface of said grid means to define a maximum height of the fluidized bed, and with said small open end extending into said high-pressure chamber and terminating above any bed of material therein whereby material of said fluidized bed entering said large open end is transferred to said high-pressure chamber in a fluidized condition creating a seal to prevent a substantial disruption in the pressure differential therebetween.
Claim 4
Dependent Claim
164 words
A material fluidizing apparatus comprising: a high-pressure chamber of gaseous medium; a low-pressure chamber of gaseous medium disposed above said high-pressure chamber; a grid means disposed between said chambers maintaining a pressure differential therebetween, and passing gaseous medium from said high-pressure chamber to said low-pressure chamber to create a fluidized bed of material contained in said low-pressure chamber adjacent an upper surface of said grid means; and a material transfer valve having a large open end and a small open end, said valve being mounted on said grid means with said large end disposed above said upper surface of said grid means to define a maximum height of the fluidized bed, and with said small open end extending into said high-pressure chamber and terminating above any bed of material therein whereby material of said fluidized bed entering said large open end is transferred to said high-pressure chamber in a fluidized condition creating a seal to prevent a substantial disruption in the pressure differential therebetween.
Claim 5
Dependent Claim
177 words
A material fluidizing apparatus comprising: a high-pressure chamber of gaseous medium; a low-pressure chamber of gaseous medium disposed above said high-pressure chamber; a grid means disposed between said chambers maintaining a pressure differential therebetween, and passing gaseous fluid from said high-pressure chamber to create a fluidized bed of material contained in said low-pressure chamber adjacent an upper surface of said grid means; a transfer valve having an upper end portion diverging to a large open end, and lower end portion converging to a restricted orifice, said valve being mounted on said grid means with said upper end portion disposed above said upper surface of said grid means, and said restricted orifice being disposed in said high-pressure chamber above any bed Of material contained therein; and whereby a gaseous medium under pressure entering said restricted orifice expands in said valve with a corresponding decrease in pressure and velocity so that material entering said large open end is transferred as a moving barrier through said orifice into said high-pressure chamber without causing a substantial disruption of said pressure differential.
Claim 6
Dependent Claim
177 words
A material fluidizing apparatus comprising: a high-pressure chamber of gaseous medium; a low-pressure chamber of gaseous medium disposed above said high-pressure chamber; a grid means disposed between said chambers maintaining a pressure differential therebetween, and passing gaseous fluid from said high-pressure chamber to create a fluidized bed of material contained in said low-pressure chamber adjacent an upper surface of said grid means; a transfer valve having an upper end portion diverging to a large open end, and lower end portion converging to a restricted orifice, said valve being mounted on said grid means with said upper end portion disposed above said upper surface of said grid means, and said restricted orifice being disposed in said high-pressure chamber above any bed Of material contained therein; and whereby a gaseous medium under pressure entering said restricted orifice expands in said valve with a corresponding decrease in pressure and velocity so that material entering said large open end is transferred as a moving barrier through said orifice into said high-pressure chamber without causing a substantial disruption of said pressure differential.
Claim 7
Dependent Claim
47 words
A material fluidizing apparatus according to claim 3, wherein said lower end portion of said conduit includes means allowing gaseous medium from the high-pressure chamber to enter said valve adjacent said orifice for insuring fluidization of the material adjacent the orifice while being transferred through said valve.
Claim 8
Dependent Claim
34 words
A material fluidizing apparatus according to claim 4, wherein said means allowing gaseous medium from the high-pressure chamber to enter said conduit comprise openings formed in said lower end portion adjacent said restricted orifice.
Claim 9
Independent Claim
95 words
A method of transferring fluidized flow of material from a low-pressure chamber to a high-pressure chamber comprising the steps of introducing a high-pressure medium into a low-pressure chamber through a grid means to cause the material in the low-pressure chamber to be fluidized adjacent the grid means, causing the fluidized material to flow through a funnel like structure having an open end disposed above said grid member and to be discharged through a restricted orifice into the high-pressure chamber without causing any substantial disturbance in a pressure differential between the respective low- and high-pressure chambers.
Claim 10
Independent Claim
95 words
A method of transferring fluidized flow of material from a low-pressure chamber to a high-pressure chamber comprising the steps of introducing a high-pressure medium into a low-pressure chamber through a grid means to cause the material in the low-pressure chamber to be fluidized adjacent the grid means, causing the fluidized material to flow through a funnel like structure having an open end disposed above said grid member and to be discharged through a restricted orifice into the high-pressure chamber without causing any substantial disturbance in a pressure differential between the respective low- and high-pressure chambers.
Claim 11
Dependent Claim
92 words
A process for treating and reclaiming sand for use in a foundry, comprising the steps of: fluidizing and preheating the sand in a first fluidized bed; transferring said sand while in a fluidized condition from said first bed to a second fluidized bed; roasting the sand in said second fluidized bed to remove all of the impurities and contaminants therein; transferring said sand in a fluidized condition from said second bed to a third fluidized bed; cooling said sand in the third bed; and removing the sand from said third fluidized bed.
Claim 12
Dependent Claim
28 words
A process according to claim 1, wherein the step of preheating includes spraying the first fluidized bed with a liquid to control the temperature of the first bed.
Claim 13
Dependent Claim
79 words
A process for treating sand comprising the steps of creating a preheating fluidized bed, a roasting fluidized bed and a cooling fluidized bed, and causing sand introduced to said preheating bed to flow therethrough and to be transferred while in the fluidized condition to said roasting bed and then to be transferred from said roasting bed to said cooling bed whereby the sand is preheated, roasted, and cooled while in a fluidized condition to remove impurities and contaminants therefrom.
Claim 14
Dependent Claim
79 words
A process for treating sand comprising the steps of creating a preheating fluidized bed, a roasting fluidized bed and a cooling fluidized bed, and causing sand introduced to said preheating bed to flow therethrough and to be transferred while in the fluidized condition to said roasting bed and then to be transferred from said roasting bed to said cooling bed whereby the sand is preheated, roasted, and cooled while in a fluidized condition to remove impurities and contaminants therefrom.
Claim 15
Dependent Claim
149 words
A material fluidizing and treating apparatus comprising: a high-pressure chamber of gaseous medium; a low-pressure chamber of gaseous medium disposed above said high-pressure chamber; a grid means disposed between said chambers maintaining a pressure differential therebetween, and passing gaseous fluid from said high-pressure chamber into said low-pressure chamber to create a fluidized bed of material contained in said low-pressure chamber adjacent an upper surface of said grid means; treatment means disposed in said apparatus for treating the material in said fluidized bed; and a material transfer valve having a large open end and a small open end, said valve being mounted on said grid means with said large end projecting above said upper surface into said low-pressure chamber and said small end extending into said high-pressure chamber so that the valve transfers material from said low-pressure chamber to said high-pressure chamber without causing substantial disruption of the pressure differential.
Claim 16
Dependent Claim
149 words
A material fluidizing and treating apparatus comprising: a high-pressure chamber of gaseous medium; a low-pressure chamber of gaseous medium disposed above said high-pressure chamber; a grid means disposed between said chambers maintaining a pressure differential therebetween, and passing gaseous fluid from said high-pressure chamber into said low-pressure chamber to create a fluidized bed of material contained in said low-pressure chamber adjacent an upper surface of said grid means; treatment means disposed in said apparatus for treating the material in said fluidized bed; and a material transfer valve having a large open end and a small open end, said valve being mounted on said grid means with said large end projecting above said upper surface into said low-pressure chamber and said small end extending into said high-pressure chamber so that the valve transfers material from said low-pressure chamber to said high-pressure chamber without causing substantial disruption of the pressure differential.
Claim 17
Independent Claim
271 words
An apparatus for fluidizing and treating a material, comprising: a vessel; material supply means to introduce material adjacent the tOp of said vessel; material discharge means disposed adjacent the bottom of the vessel to remove material from said vessel; gas medium supply means introducing a gaseous medium adjacent the bottom of said vessel; a gaseous medium exhaust means for removing the gaseous medium adjacent the top of the vessel to create an upward flow of the gaseous medium through said vessel; a plurality of grid means extending across the vessel and said upward flow to divide said vessel into a plurality of superimposed pressure chambers, said grid means creating a pressure differential between each adjacent chamber so that pressure is decreased in each chamber as the distance from the bottom of the vessel increases, each of said grid means being able to pass gaseous medium from the lower to the upper surface to create a fluidized bed adjacent an upper surface thereof; transfer valves disposed in each of said grid means to transfer material from each fluidized bed to the chamber disposed therebelow, said valves having an upper open end projecting above the upper surface of said grid means and a lower restricted orifice extending into the chamber beneath said grid means, said restricted orifices being smaller than the upper end so that material is transferred from an upper pressure chamber across said grid means to a lower pressure chamber without substantially affecting the pressure differential; and treating means for introducing a treating medium into one of said fluidized beds so that material supplied to said vessel is fluidized and treated.
Claim 18
Independent Claim
271 words
An apparatus for fluidizing and treating a material, comprising: a vessel; material supply means to introduce material adjacent the tOp of said vessel; material discharge means disposed adjacent the bottom of the vessel to remove material from said vessel; gas medium supply means introducing a gaseous medium adjacent the bottom of said vessel; a gaseous medium exhaust means for removing the gaseous medium adjacent the top of the vessel to create an upward flow of the gaseous medium through said vessel; a plurality of grid means extending across the vessel and said upward flow to divide said vessel into a plurality of superimposed pressure chambers, said grid means creating a pressure differential between each adjacent chamber so that pressure is decreased in each chamber as the distance from the bottom of the vessel increases, each of said grid means being able to pass gaseous medium from the lower to the upper surface to create a fluidized bed adjacent an upper surface thereof; transfer valves disposed in each of said grid means to transfer material from each fluidized bed to the chamber disposed therebelow, said valves having an upper open end projecting above the upper surface of said grid means and a lower restricted orifice extending into the chamber beneath said grid means, said restricted orifices being smaller than the upper end so that material is transferred from an upper pressure chamber across said grid means to a lower pressure chamber without substantially affecting the pressure differential; and treating means for introducing a treating medium into one of said fluidized beds so that material supplied to said vessel is fluidized and treated.
Claim 19
Dependent Claim
93 words
A transfer valve for transferring material from a fluidized bed in a low-pressure chamber to a high-pressure chamber without disrupting the pressure differential therebetween, comprising: an upper portion diverging to the large open end and a lower portion connected to said upper portion and converging to a restricted orifice having an opening area less than the opening area of the large open end whereby a medium of the high-pressure chamber entering said orifice is expanded to reduce the pressure and velocity to permit material to flow through the conduit into the high-pressure chamber.
Claim 20
Dependent Claim
93 words
A transfer valve for transferring material from a fluidized bed in a low-pressure chamber to a high-pressure chamber without disrupting the pressure differential therebetween, comprising: an upper portion diverging to the large open end and a lower portion connected to said upper portion and converging to a restricted orifice having an opening area less than the opening area of the large open end whereby a medium of the high-pressure chamber entering said orifice is expanded to reduce the pressure and velocity to permit material to flow through the conduit into the high-pressure chamber.
Claim 21
Dependent Claim
30 words
A transfer valve according to claim 12 which includes means adjacent said orifice to enable additional medium to enter said valve to insure fluidization of material in the lower portion.
Claim 22
Dependent Claim
69 words
A transfer valve for transferring material from a fluidized bed in a low-pressure chamber into a high-pressure chamber without disrupting the pressure differential existing therebetween, comprising: a body portion; an upper portion secured to said body portion and diverging to a large weir surface projecting into said low-pressure chamber; and a lower portion secured to said body portion and converging to a restricted orifice disposed in the high-pressure chamber.
Claim 23
Dependent Claim
69 words
A transfer valve for transferring material from a fluidized bed in a low-pressure chamber into a high-pressure chamber without disrupting the pressure differential existing therebetween, comprising: a body portion; an upper portion secured to said body portion and diverging to a large weir surface projecting into said low-pressure chamber; and a lower portion secured to said body portion and converging to a restricted orifice disposed in the high-pressure chamber.
Claim 24
Dependent Claim
95 words
A transfer valve for transferring material from a fluidized bed in a low-pressure chamber into a high-pressure chamber without substantially disrupting a pressure differential existing therebetween, comprising: an upper portion having a weir opening and converging to a smaller end, said upper portion being disposable in the fluidized bed with the weir opening adjacent an upper level of the bed; and a lower portion having an upper end secured to said smaller end of said upper portion, said lower portion converging from said upper end into a restricted orifice being disposed in said high-pressure chamber.
Claim 25
Dependent Claim
95 words
A transfer valve for transferring material from a fluidized bed in a low-pressure chamber into a high-pressure chamber without substantially disrupting a pressure differential existing therebetween, comprising: an upper portion having a weir opening and converging to a smaller end, said upper portion being disposable in the fluidized bed with the weir opening adjacent an upper level of the bed; and a lower portion having an upper end secured to said smaller end of said upper portion, said lower portion converging from said upper end into a restricted orifice being disposed in said high-pressure chamber.
Claim 26
Dependent Claim
115 words
A transfer valve for transferring material from a fluidized bed in a low-pressure chamber to a high-pressure chamber without disrupting the pressure differential therebetween, comprising: a tubular body converging at one end into a restricted orifice and diverging at the other end into an enlarged open end having an opening area greater than the opening area of said orifice, the areas being in a ratio of a range between 20:1 to 40:1, said valve being disposed with the enlarged open end in the low-pressure chamber and the orIfice in the high-pressure chamber whereby said valve transfers material from a fluidized bed through a pressure differential of a range of 3 to 30 inches of water.
Claim 27
Dependent Claim
115 words
A transfer valve for transferring material from a fluidized bed in a low-pressure chamber to a high-pressure chamber without disrupting the pressure differential therebetween, comprising: a tubular body converging at one end into a restricted orifice and diverging at the other end into an enlarged open end having an opening area greater than the opening area of said orifice, the areas being in a ratio of a range between 20:1 to 40:1, said valve being disposed with the enlarged open end in the low-pressure chamber and the orIfice in the high-pressure chamber whereby said valve transfers material from a fluidized bed through a pressure differential of a range of 3 to 30 inches of water.
Claim 28
Dependent Claim
167 words
A material fluidizing apparatus comprising: a high-pressure chamber of gaseous medium; a low-pressure chamber of gaseous medium disposed above said high-pressure chamber; a grid means disposed between said chambers maintaining a pressure differential therebetween, and passing gaseous medium from said high-pressure chamber into the low-pressure chamber to create a fluidized bed of material contained therein adjacent an upper surface of said grid means; and a material transfer valve having a large open end and a small open end, said valve being mounted on said grid means with said large end projecting into said low-pressure chamber and said small end extending into said high-pressure chamber, said large open end having an area greater than the area said small open end, said areas being in a ratio having a range of 20:1 to 40:1 whereby said valve transfers material from said low-pressure chamber to said high-pressure chamber across a pressure differential of a range of 3 to 30 inches of water without any substantial disruption of the pressure differential.
Claim 29
Dependent Claim
167 words
A material fluidizing apparatus comprising: a high-pressure chamber of gaseous medium; a low-pressure chamber of gaseous medium disposed above said high-pressure chamber; a grid means disposed between said chambers maintaining a pressure differential therebetween, and passing gaseous medium from said high-pressure chamber into the low-pressure chamber to create a fluidized bed of material contained therein adjacent an upper surface of said grid means; and a material transfer valve having a large open end and a small open end, said valve being mounted on said grid means with said large end projecting into said low-pressure chamber and said small end extending into said high-pressure chamber, said large open end having an area greater than the area said small open end, said areas being in a ratio having a range of 20:1 to 40:1 whereby said valve transfers material from said low-pressure chamber to said high-pressure chamber across a pressure differential of a range of 3 to 30 inches of water without any substantial disruption of the pressure differential.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-25 | 1974-07-27 | 1975-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-25 | 1978-07-27 | 1979-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-25 | 1982-07-27 | 1983-01-26 | $7700.00 | Window Closed / Lapsed |