Patent US4733619A successfully refreshed from Google Patents.
US4733619A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Powder feeder
Assignee: JFE Steel Corp
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Filing: 1986-12-01
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Granted: 1988-03-29
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Expires: 2006-12-01
Abstract
Abstract A powder feeder, includes a cylinder body connected to a gas blow pipe for fluidizing a powder at its bottom portion; a porous plate crossing the lower portion of the cylinder body above a gas blow hole; a partition plate which divides the interior of the cylinder body into a powder supply side and a delivery side and has a slit for communicating the supply and delivery sides with each other at its upper portion; a powder supply pipe connected to the lower portion of the cylinder body at the supply side to be inclined downward toward a connecting portion; and a powder delivery pipe connected to the lower portion of the cylinder body at the delivery side to be inclined downward in a delivery direction.
Inventors
- 👤 Sadahiko Maeda
- 👤 Yasumasa Idei
- 👤 Toshihiro Inatani
- 👤 Mitsuo Sumito
- 👤 Takao Hamada
- 👤 Shunji Hamada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:29
CPC Classifications
C; C21; C21B; C21B13/00; C21B13/0033; B; B01; B01J; B01J8/00; B01J8/0015; C21B13/0006; C21B13/0026; C21B5/00; C21B5/02; C21B5/023; C21B5/026; F; F23; F23G; F23G5/00; F23G5/02; F23G5/027; F23G5/30; F27; F27B; F27B15/00; F27B15/02; F27B15/08; F27D; F27D3/00; F27D3/18; F23G2201/00; F23G2201/50; F23G2203/00; F23G2203/50; F23G2203/503; F23J; F23J2215/00; F23J2215/20; F23J2219/00; F23J2219/60
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
123 words
A powder feeder, comprising: a cylinder body connected to a gas blow pipe for fluidizing a powder at its bottom portion; a porous plate crossing the lower portion of said cylinder body above a gas blow hole; partitioning means for vertically dividing the interior of said cylinder body into a powder supply side and a delivery side and for communicating the supply and delivery sides with each other at its upper portion; a powder supply pipe connected to the lower portion of said cylinder body at the supply side to be inclined downward toward a connecting portion; and a powder delivery pipe connected to the lower portion of said cylinder body at the delivery side to be inclined downward in a delivery direction.
Claim 2
Dependent Claim
123 words
A powder feeder, comprising: a cylinder body connected to a gas blow pipe for fluidizing a powder at its bottom portion; a porous plate crossing the lower portion of said cylinder body above a gas blow hole; partitioning means for vertically dividing the interior of said cylinder body into a powder supply side and a delivery side and for communicating the supply and delivery sides with each other at its upper portion; a powder supply pipe connected to the lower portion of said cylinder body at the supply side to be inclined downward toward a connecting portion; and a powder delivery pipe connected to the lower portion of said cylinder body at the delivery side to be inclined downward in a delivery direction.
Claim 3
Dependent Claim
48 words
A feeder according to claim 1, wherein said vertical partitioning means comprises an inner cylinder which is concentrically formed in said cylinder body and has a slit for communicating the supply and delivery sides of the interior of said cylinder body with each other, and two partition plates.
Claim 4
Dependent Claim
34 words
A feeder according to claim 1, wherein said partitioning means comprises a partition plate having a slit for communicating the supply and delivery sides of the interior of said cylinder body with each other.
Claim 5
Dependent Claim
35 words
A feeder according to claim 2, further comprising a guide plate for coupling a lower end of the lower portion of said cylinder body at the delivery side and a lower edge of said slit.
Claim 6
Dependent Claim
18 words
A feeder according to claim 4, wherein a gas blow hole is formed in said powder delivery pipe.
Claim 7
Dependent Claim
35 words
A feeder according to claim 3, further comprising a guide plate for coupling a lower end of the lower portion of said cylinder body at the delivery side and a lower edge of said slit.
Claim 8
Dependent Claim
18 words
A feeder according to claim 6, wherein a gas blow hole is formed in said powder delivery pipe.
Claim 9
Dependent Claim
155 words
A waste combustion system comprising a converter for combusting a waste to generate a converter gas; a fluidized bed combustor for combusting the converter gas to recover heat; and a powder feeder, said powder feeder comprising: a cylinder body connected to a gas blow pipe for fluidizing a powder at its bottom portion; a porous plate crossing the lower portion of said cylinder body above a gas blow hole; partitioning means for vertically dividing the interior of said cylinder body into a powder supply side and a delivery side and for communicating the supply and delivery sides with each other at its upper portion; a powder supply pipe connected to the lower portion of said cylinder body at the supply side to be inclined downward toward a connecting portion; and a powder delivery pipe connected to the lower portion of said cylinder body at the delivery side to be inclined downward in a delivery direction.
Claim 10
Dependent Claim
155 words
A waste combustion system comprising a converter for combusting a waste to generate a converter gas; a fluidized bed combustor for combusting the converter gas to recover heat; and a powder feeder, said powder feeder comprising: a cylinder body connected to a gas blow pipe for fluidizing a powder at its bottom portion; a porous plate crossing the lower portion of said cylinder body above a gas blow hole; partitioning means for vertically dividing the interior of said cylinder body into a powder supply side and a delivery side and for communicating the supply and delivery sides with each other at its upper portion; a powder supply pipe connected to the lower portion of said cylinder body at the supply side to be inclined downward toward a connecting portion; and a powder delivery pipe connected to the lower portion of said cylinder body at the delivery side to be inclined downward in a delivery direction.
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) | 1991-03-29 | 1991-09-28 | 1992-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-03-29 | 1995-09-28 | 1996-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-03-29 | 1999-09-28 | 2000-03-29 | $7700.00 | Window Closed / Lapsed |