US4362441A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Means and apparatus for throttling a dry pulverized solid material pump
Assignee: Lockheed Martin Corp
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Filing: 1980-10-23
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Granted: 1982-12-07
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Expires: 2000-10-23
Abstract
Abstract Method and apparatus are shown for control of 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 zone chamber to a plurality of sprues mounted in the rotor. Control of the pressure within control nozzles downstream from the sprues adjusts the flow rate of coal through the sprues.
Inventors
- 👤 John W. Meyer
- 👤 Arnold D. Daniel, Jr.
- 👤 John H. Bonin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:50
CPC Classifications
B; B05; B05B; B05B7/00; B05B7/14; B05B7/1404; B05B7/144; B01; B01J; B01J3/00; B01J3/02; B65; B65G; B65G53/00; B65G53/34; B65G53/40; B65G53/42; C; C10; C10J; C10J3/00; C10J3/46; C10J3/48; C10J3/50; C10J3/72; C10J3/723; C10J3/78; C10J2200/00; C10J2200/15; C10J2200/152; C10J2300/00; C10J2300/09; C10J2300/0913; C10J2300/093
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
128 words
Apparatus for the control continuous feeding of relatively fine particulate material into a high pressure container, comprising: a rotor having a central hub and a plurality of sprues providing a passageway through which the particulate material is passed, each of said sprues extending radially outward from an inner periphery of said rotor to terminate adjacent to a control nozzle at the periphery of the rotor, the sprue at the section adjacent the termination having a low angle of convergence and the nozzle having a substantially greater angle of convergence, and variable pressure means connected to said control nozzles at a location radially outward from and adjacent to said sprue for varying the gas pressure within said control nozzles to thereby adjust the flow rate of the particulate material.
Claim 2
Dependent Claim
128 words
Apparatus for the control continuous feeding of relatively fine particulate material into a high pressure container, comprising: a rotor having a central hub and a plurality of sprues providing a passageway through which the particulate material is passed, each of said sprues extending radially outward from an inner periphery of said rotor to terminate adjacent to a control nozzle at the periphery of the rotor, the sprue at the section adjacent the termination having a low angle of convergence and the nozzle having a substantially greater angle of convergence, and variable pressure means connected to said control nozzles at a location radially outward from and adjacent to said sprue for varying the gas pressure within said control nozzles to thereby adjust the flow rate of the particulate material.
Claim 3
Dependent Claim
45 words
The apparatus for the control of the continuous feeding of relatively fine particulate material into a high pressure container as set forth in claim 1, wherein: said variable pressure means includes a gas receiving space adjacent to said sprue and connected to the control nozzle.
Claim 4
Dependent Claim
55 words
The apparatus for the control of the continuous feeding of relatively fine particulate material into a high pressure container as set forth in claim 2, wherein: said variable pressure means includes a central, gas plenum defined by the hub of said rotor and conduit means connecting said central gas plenum to said gas receiving space.
Claim 5
Dependent Claim
37 words
The apparatus for the control of the continuous feeding of relatively fine particulate material into a high pressure container as set forth in claim 3, wherein: said variable pressure means includes a pressure regulator and control system.
Claim 6
Dependent Claim
43 words
The apparatus for the control of the continuous feeding of relatively fine particulate material into a high pressure container as set forth in claim 1, wherein the diameter of the distal opening of said control nozzle is between 2 millimeters and 12 millimeters.
Claim 7
Dependent Claim
42 words
The apparatus as set forth in claim 1, wherein said control nozzle includes a passageway through which the particulate material is passed and wherein said nozzle passageway is substantially cone shaped, having a half angle less than the critical angle of slide.
Claim 8
Dependent Claim
41 words
The apparatus as set forth in claim 1, wherein said control nozzle includes a passageway through which the particulate material is passed and wherein said nozzle passageway has a greater wall angle at its distal end than at its proximal end.
Claim 9
Dependent Claim
20 words
The apparatus as set forth in claim 1, 4, 5, or 7, wherein said nozzle passageway has an ogive shape.
Claim 10
Dependent Claim
30 words
The apparatus as set forth in claim 7 wherein the wall angle at the distal end is approximately 16° and the wall angle at the proximal end is approximately 30°.
Claim 11
Dependent Claim
30 words
The apparatus as set forth in claim 8 wherein the wall angle at the distal end is approximately 16° and the wall angle at the proximal end is approximately 30°.
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) | 1985-12-06 | 1986-06-07 | 1986-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-12-06 | 1990-06-07 | 1990-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-12-06 | 1994-06-07 | 1994-12-07 | $7700.00 | Window Closed / Lapsed |