US4376608A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Kinetic extruder - a dry pulverized solid material pump
Assignee: Lockheed Martin Corp
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Filing: 1980-09-17
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Granted: 1983-03-15
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Expires: 2000-09-17
Abstract
Abstract Method and apparatus are shown for the continuous feeding of pulverized material to a high pressure container. A rotor is located within the high pressure container. The pulverized material is fed from a feed hopper through a stationary feed pipe to a vented spin-up chamber to a plurality of two-stage sprues mounted in the rotor. Control nozzles downstream from the sprues meter the flow of coal through the sprues.
Inventors
- 👤 John W. Meyer
- 👤 John H. Bonin
- 👤 Arnold D. Daniel, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 03:51
CPC Classifications
B; B05; B05B; B05B3/00; B05B3/02; B05B3/10; B05B3/1007; B05B3/1021; B01; B01J; B01J3/00; B01J3/02; B05B3/1057; C; C10; C10J; C10J3/00; C10J3/46; C10J3/48; C10J3/50; C10J2200/00; C10J2200/39
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
292 words
Apparatus for feeding a pulverized material from a supply source to a container against a pressure differential, said apparatus including a stationary feed pipe, said stationary feed pipe having an input end and an output end, said feed pipe adapted to feed pulverized material from the input end to the output end, said output end including at least one radially extending opening and defining an inner hub; a rotor, said rotor includes a plurality of radial sprues, each sprue including a proximal end and a distal end defining a passage for passage of said pulverized material, nozzle means cooperatively mounted at the distal end of each of said sprues for maintaining a stable plug of the pulverized material in said sprues and for controlling the flow of said material independent of the pressure in said container, said rotor rotatably mounted concentrically with respect to said inner hub of said stationary feed pipe and said rotor located so that the proximal ends of the sprues are juxtaposed to said inner hub, the space between proximal ends of the sprues and said inner hub forming a spin-up zone where said pulverized material emitting from said output end of said stationary feed pipe is accelerated before entering into said sprues of said rotating rotor, said nozzle means further defined as a fixed geometry nozzle having a relatively large opening cooperating with the distal end of said sprue and a smaller metering opening at the terminal end to control the flow of said material independent of the gas pressure in the said container at the terminal end immediately external to said rotor, said nozzle means including at least one port permitting gas pressure to equalize between the pulverized material within said nozzle structure and said container.
Claim 2
Dependent Claim
292 words
Apparatus for feeding a pulverized material from a supply source to a container against a pressure differential, said apparatus including a stationary feed pipe, said stationary feed pipe having an input end and an output end, said feed pipe adapted to feed pulverized material from the input end to the output end, said output end including at least one radially extending opening and defining an inner hub; a rotor, said rotor includes a plurality of radial sprues, each sprue including a proximal end and a distal end defining a passage for passage of said pulverized material, nozzle means cooperatively mounted at the distal end of each of said sprues for maintaining a stable plug of the pulverized material in said sprues and for controlling the flow of said material independent of the pressure in said container, said rotor rotatably mounted concentrically with respect to said inner hub of said stationary feed pipe and said rotor located so that the proximal ends of the sprues are juxtaposed to said inner hub, the space between proximal ends of the sprues and said inner hub forming a spin-up zone where said pulverized material emitting from said output end of said stationary feed pipe is accelerated before entering into said sprues of said rotating rotor, said nozzle means further defined as a fixed geometry nozzle having a relatively large opening cooperating with the distal end of said sprue and a smaller metering opening at the terminal end to control the flow of said material independent of the gas pressure in the said container at the terminal end immediately external to said rotor, said nozzle means including at least one port permitting gas pressure to equalize between the pulverized material within said nozzle structure and said container.
Claim 3
Dependent Claim
54 words
The apparatus for feeding a pulverized material as defined in claim 1, wherein each sprue includes a first and second section, said first and second section defining a passage having rectangular cross section shape at the proximal end of said first section to thereby substantially eliminate ledges on the proximal end of said rotor.
Claim 4
Dependent Claim
57 words
The apparatus for feeding a pulverized material, as defined in claim 2, wherein said first section of said plurality of sprues defines a passage having a relatively large cross sectional area reduction in the radial direction, and where said passage has a cross sectional area having a transition from a rectangular to a circular cross sectional shape.
Claim 5
Dependent Claim
23 words
The apparatus for feeding a pulverized material as defined in claim 1, including venting means to remove excess gas from the hub region.
Claim 6
Dependent Claim
32 words
The apparatus for feeding a pulverized material as defined in claim 4, wherein said venting means is adapted to maintain a pressure difference between said feed pipe and said spin up zone.
Claim 7
Dependent Claim
30 words
The apparatus for feeding a pulverized material as defined in claim 5, further defined as including means for spinning said rotor relative to said feed pipe and said inner hub.
Claim 8
Dependent Claim
26 words
The apparatus for feeding a pulverized material as defined in claim 1, further defined as including means for spinning said rotor relative to said feed pipe.
Claim 9
Dependent Claim
45 words
The apparatus for feeding a pulverized material as defined in claim 1, wherein said stationary feed pipe is further defined as including a secondary channel and a venting means, said venting means connected to said secondary channel for removing gas from the spin up region.
Claim 10
Dependent Claim
38 words
The apparatus for feeding a pulverized material as defined in claim 8, wherein said venting means is adapted to maintain the pressure at said spin up zone at a lower pressure than the pressure at said supply source.
Claim 11
Dependent Claim
37 words
The apparatus for feeding a pulverized material as defined in claim 8, wherein said secondary channel communicates with said spin-up zone by way of narrow gap disposed between the end of said inner hub and said rotor.
Claim 12
Dependent Claim
32 words
The apparatus for feeding a pulverized material as defined in claim 8, wherein said stationary feed pipe is further defined as including a third channel for injecting gas into said spin-up region.
Claim 13
Dependent Claim
172 words
Apparatus for feeding a pulverized material from a supply source to a housing maintained at elevated pressure, said apparatus including a rotor disposed in said housing and a feed means, said rotor operably connected to the feed means for receiving the pulverized material and discharging it within the housing, said rotor including a first means for forming a plug of the material, said first means having a material inlet and outlet, and said rotor including a second means for controlling the flow of material through said rotor, said second means spaced from the outlet of the first means and substantially in alignment therewith, said second means including an isobaric control nozzle having a fixed geometry, said control nozzle sized to control the flow of said material through said rotor and through said apparatus, said control nozzle further defined as including at least one fixed port communicating with the interior of said housing for maintaining the junction between said first and second means at the same pressure as the pressure in said housing.
Claim 14
Dependent Claim
172 words
Apparatus for feeding a pulverized material from a supply source to a housing maintained at elevated pressure, said apparatus including a rotor disposed in said housing and a feed means, said rotor operably connected to the feed means for receiving the pulverized material and discharging it within the housing, said rotor including a first means for forming a plug of the material, said first means having a material inlet and outlet, and said rotor including a second means for controlling the flow of material through said rotor, said second means spaced from the outlet of the first means and substantially in alignment therewith, said second means including an isobaric control nozzle having a fixed geometry, said control nozzle sized to control the flow of said material through said rotor and through said apparatus, said control nozzle further defined as including at least one fixed port communicating with the interior of said housing for maintaining the junction between said first and second means at the same pressure as the pressure in said housing.
Claim 15
Dependent Claim
30 words
The apparatus for feeding a pulverized material as described in claim 12, wherein the outlet of said control nozzle is substantially smaller than the output of said plug forming means.
Claim 16
Dependent Claim
37 words
The apparatus for feeding a pulverized material as described in claim 13, wherein the cross-sectional area of the outlet of said plug-forming means is substantially three times the cross-sectional area of the output of said control nozzle.
References Cited (Backward Citations)
US2990011A
Cited
US3103311A
Cited
US3438517A
Cited
US3535629A
Cited
US3583413A
Cited
US4265580A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-03-14 | 1986-09-13 | 1987-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-03-14 | 1990-09-13 | 1991-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-03-14 | 1994-09-13 | 1995-03-15 | $7700.00 | Window Closed / Lapsed |