US3599832A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flow control of fluidized material
Assignee: INDUSTRIAL PNEUMATIC SYSTEMS Inc
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Filing: 1969-12-23
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Granted: 1971-08-17
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Expires: 1989-12-23
Abstract
Abstract This apparatus controls the flow of fluidized granular material by utilizing the pressure in the conduit to actuate one valve to increase the supply of gas to the conduit and another valve to restrict the flow of material in the conduit. Any increase in the amount of material will increase the pressure and add more gas and reduce the flow of material into the conduit to maintain continuous flow of fluidized material. When used in a rockdusting system, the fluidized material is discharged from a nozzle at the end of the conduit under control of a manually actuated valve. Closing the valve causes pressure in the conduit closure of the valve restricting flow of the material. The air supply to the conduit will be increased and the supply of material reduced with decrease in the discharge of material at the nozzle.
Inventors
- 👤 Carlowen Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:36
CPC Classifications
B; B65; B65G; B65G53/00; B65G53/34; B65G53/66
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
129 words
In a fluidized material conveying system, a material flow conduit for conveying said fluidized material, an adjustable discharge valve for said conduit to control discharge of material from said conduit, and means to supply gas to said fluidized material to prevent clogging when said discharge valve restricts passage of said material, comprising a gas conduit for supplying gas to said to said fluidized material connected to said material flow conduit, a pressure actuated gas flow control valve in said gas conduit, and means to adjust said pressure actuated valve to increase the flow of gas in said gas conduit in response to increase of pressure in said material flow conduit, which results from an increase in material in said material flow conduit or from closure of said discharge valve.
Claim 2
Dependent Claim
129 words
In a fluidized material conveying system, a material flow conduit for conveying said fluidized material, an adjustable discharge valve for said conduit to control discharge of material from said conduit, and means to supply gas to said fluidized material to prevent clogging when said discharge valve restricts passage of said material, comprising a gas conduit for supplying gas to said to said fluidized material connected to said material flow conduit, a pressure actuated gas flow control valve in said gas conduit, and means to adjust said pressure actuated valve to increase the flow of gas in said gas conduit in response to increase of pressure in said material flow conduit, which results from an increase in material in said material flow conduit or from closure of said discharge valve.
Claim 3
Dependent Claim
96 words
In a fluidized material conveying system, a material flow conduit for conveying said fluidized material, adjustable material flow control means to control flow of fluidized material in said material flow conduit, a gas supply conduit connected to said material flow conduit downstream from said material flow control means to supply gas to said fluidized material, adjustable flow control means to restrict flow of gas in said gas supply conduit, and means to adjust said two flow control means in response to variations in pressure in said material flow conduit downstream from said material flow control means.
Claim 4
Dependent Claim
96 words
In a fluidized material conveying system, a material flow conduit for conveying said fluidized material, adjustable material flow control means to control flow of fluidized material in said material flow conduit, a gas supply conduit connected to said material flow conduit downstream from said material flow control means to supply gas to said fluidized material, adjustable flow control means to restrict flow of gas in said gas supply conduit, and means to adjust said two flow control means in response to variations in pressure in said material flow conduit downstream from said material flow control means.
Claim 5
Dependent Claim
168 words
In a fluidized material conveying system, a material flow conduit for conveying said fluidized material, a discharge valve for said conduit to control discharge of material from said conduit, a pressure actuated adjustable material flow control valve in said conduit upstream from said discharge valve, means to supply gas to said fluidized material to prevent clogging when said discharge valve restricts passage of said material, comprising a gas conduit for supplying gas to said fluidized material connected to said material flow conduit between said valves, and a pressure actuated gas flow control valve in said gas conduit, and means to adjust said pressure actuated valves to control the flow of material in said material flow conduit and the flow of gas in in said gas conduit under control of the pressure in said material flow conduit between said two valves in said material flow conduit so that said material does not clog said conduit and that sufficient gas to material ratio is supplied to maintain flow of material.
Claim 6
Dependent Claim
168 words
In a fluidized material conveying system, a material flow conduit for conveying said fluidized material, a discharge valve for said conduit to control discharge of material from said conduit, a pressure actuated adjustable material flow control valve in said conduit upstream from said discharge valve, means to supply gas to said fluidized material to prevent clogging when said discharge valve restricts passage of said material, comprising a gas conduit for supplying gas to said fluidized material connected to said material flow conduit between said valves, and a pressure actuated gas flow control valve in said gas conduit, and means to adjust said pressure actuated valves to control the flow of material in said material flow conduit and the flow of gas in in said gas conduit under control of the pressure in said material flow conduit between said two valves in said material flow conduit so that said material does not clog said conduit and that sufficient gas to material ratio is supplied to maintain flow of material.
Claim 7
Dependent Claim
127 words
In a fluidized material conveying system, a material flow conduit for conveying said fluidized material, adjustable material flow control means to restrict flow of fluidized material in said material flow conduit, a gas supply conduit connected to said material flow conduit downstream from said material flow control means to supply gas to said fluidized material, adjustable gas flow control means to control flow of gas in said gas supply conduit, and means operated by pressure in said material flow conduit downstream from said material flow control means to actuate said adjustable gas flow control means to control the flow of gas to said material flow control conduit, so that increase of pressure in said conduit increases the ratio of gaS to material in said material flow conduit.
Claim 8
Dependent Claim
127 words
In a fluidized material conveying system, a material flow conduit for conveying said fluidized material, adjustable material flow control means to restrict flow of fluidized material in said material flow conduit, a gas supply conduit connected to said material flow conduit downstream from said material flow control means to supply gas to said fluidized material, adjustable gas flow control means to control flow of gas in said gas supply conduit, and means operated by pressure in said material flow conduit downstream from said material flow control means to actuate said adjustable gas flow control means to control the flow of gas to said material flow control conduit, so that increase of pressure in said conduit increases the ratio of gaS to material in said material flow conduit.
Claim 9
Dependent Claim
225 words
In a rockdusting system, a reservoir including means to admit gas to fluidize rockdust material in said reservoir, a source of gas under pressure connected to said reservoir to fluidize the material therein, a material flow conduit leading from said reservoir to convey fluidized material, an adjustable valve on the end of said conduit to control the discharge of material from said conduit, a gas conduit for gas from said source and connected to said material flow conduit for supplying gas to said fluidized material in said material flow conduit, a pressure actuated material flow control valve in said material flow conduit between said reservoir and the connection of said gas conduit for controlling flow of fluidized material, a pressure actuated gas flow control valve in said gas conduit for controlling the gas supply to said material flow conduit, means connecting a source of gas under pressure and said material flow conduit beyond said gas conduit to said pressure actuated valves, so that an increase in pressure in said material flow conduit causes the material pressure actuated control valve to restrict flow of material and decrease the pressure in the material flow conduit beyond said first valve and also causes the second valve to open so that more gas is admitted to the material flow conduit to reduce the pressure in said material flow conduit.
Claim 10
Dependent Claim
225 words
In a rockdusting system, a reservoir including means to admit gas to fluidize rockdust material in said reservoir, a source of gas under pressure connected to said reservoir to fluidize the material therein, a material flow conduit leading from said reservoir to convey fluidized material, an adjustable valve on the end of said conduit to control the discharge of material from said conduit, a gas conduit for gas from said source and connected to said material flow conduit for supplying gas to said fluidized material in said material flow conduit, a pressure actuated material flow control valve in said material flow conduit between said reservoir and the connection of said gas conduit for controlling flow of fluidized material, a pressure actuated gas flow control valve in said gas conduit for controlling the gas supply to said material flow conduit, means connecting a source of gas under pressure and said material flow conduit beyond said gas conduit to said pressure actuated valves, so that an increase in pressure in said material flow conduit causes the material pressure actuated control valve to restrict flow of material and decrease the pressure in the material flow conduit beyond said first valve and also causes the second valve to open so that more gas is admitted to the material flow conduit to reduce the pressure in said material flow conduit.
Claim 11
Independent Claim
76 words
The method of controlling the flow of fluidized material under fluid pressure through a material flow conduit comprising supplying fluid to said fluidized material at a point in said conduit, applying the difference in pressure between a constant fluid pressure source and the pressure in said conduit downstream from said point to control the fluid supplied to said conduit so that the ratio of fluid to material is increased with increase in pressure in said conduit.
Claim 12
Independent Claim
76 words
The method of controlling the flow of fluidized material under fluid pressure through a material flow conduit comprising supplying fluid to said fluidized material at a point in said conduit, applying the difference in pressure between a constant fluid pressure source and the pressure in said conduit downstream from said point to control the fluid supplied to said conduit so that the ratio of fluid to material is increased with increase in pressure in said conduit.
Claim 13
Independent Claim
104 words
The method of conveying fluidized material through a material flow conduit under pressure, comprising applying gas under pressure to material to be conveyed to fluidize said material and to convey said material in said conduit, applying the difference in pressure between a constant pressure source and the pressure in said conduit to restrict passage of said fluidized material in said conduit, supplying gas to said conduit downstream from the restriction in said passage and applying said difference in pressure to control the gas supplied to said conduit so that the ratio of gas to material is increased with increase in pressure in said conduit.
Claim 14
Independent Claim
104 words
The method of conveying fluidized material through a material flow conduit under pressure, comprising applying gas under pressure to material to be conveyed to fluidize said material and to convey said material in said conduit, applying the difference in pressure between a constant pressure source and the pressure in said conduit to restrict passage of said fluidized material in said conduit, supplying gas to said conduit downstream from the restriction in said passage and applying said difference in pressure to control the gas supplied to said conduit so that the ratio of gas to material is increased with increase in pressure in said conduit.
Claim 15
Independent Claim
75 words
The method of conveying fluidized material through a material flow conduit under pressure, comprising variably restricting the flow of material at a point in said conduit, supplying gas to said conduit downstream from said point, variably restricting the flow of gas to said conduit, and increasing the restriction of flow of said material and decreasing the restriction of the flow of gas in response to increase in pressure in said conduit downstream from said point.
Claim 16
Independent Claim
75 words
The method of conveying fluidized material through a material flow conduit under pressure, comprising variably restricting the flow of material at a point in said conduit, supplying gas to said conduit downstream from said point, variably restricting the flow of gas to said conduit, and increasing the restriction of flow of said material and decreasing the restriction of the flow of gas in response to increase in pressure in said conduit downstream from said point.
Claim 17
Independent Claim
130 words
The method of rockdusting which comprises passing gas into a mass of rockdusting material to fluidize said material under pressure, conveying said fluidized material through a conduit to a nozzle for discharging said material for rockdusting, restricting the discharge of said material through said nozzle according to requirements of the operation, restricting passage of said fluidized material through said conduit in response to the difference in pressure between a constant pressure source and the pressure in said conduit between said nozzle and the restriction of the passage in said conduit, and supplying gas to said conduit between said nozzle and said restriction of the passage in response to said difference in pressure, so that increase in pressure in said conduit increases the ratio of gas to material in said conduit.
Claim 18
Independent Claim
130 words
The method of rockdusting which comprises passing gas into a mass of rockdusting material to fluidize said material under pressure, conveying said fluidized material through a conduit to a nozzle for discharging said material for rockdusting, restricting the discharge of said material through said nozzle according to requirements of the operation, restricting passage of said fluidized material through said conduit in response to the difference in pressure between a constant pressure source and the pressure in said conduit between said nozzle and the restriction of the passage in said conduit, and supplying gas to said conduit between said nozzle and said restriction of the passage in response to said difference in pressure, so that increase in pressure in said conduit increases the ratio of gas to material in said conduit.
References Cited (Backward Citations)
US3163329A
Cited
US3372958A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-08-16 | 1975-02-15 | 1975-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-16 | 1979-02-15 | 1979-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-16 | 1983-02-15 | 1983-08-17 | $7700.00 | Window Closed / Lapsed |