US3733056A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluidized bed and method of treating granular material
Assignee: Individual
•
Filing: 1971-01-11
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Granted: 1973-05-15
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Expires: 1991-01-11
Abstract
Abstract The bed includes a deck having a plurality of openings and side walls defining a trough with the deck. A plenum below the deck supplies air through the openings for fluidizing material in the trough, the openings being arranged to direct air in a manner to establish a predetermined flow pattern for circulating and mixing the material. In one form hereof, the flow direction is transversely of the bed to provide a circular mixing action. In another form, the openings are configured to provide both transverse and horizontal components of flow whereby the material is circulated as it moves downstream through the trough.
Inventors
- 👤 L Fong
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:53
CPC Classifications
B; B01; B01J; B01J8/00; B01J8/18; B01J8/24; B01J8/44; B01F; B01F33/00; B01F33/40; B01F33/409; B01J8/36
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
164 words
A fluidized bed for agitating and fluidizing particulate material within the fluid bed comprising an elongated deck for receiving the material, a front wall, a rear wall and opposed side walls for said deck to confine the material received on said deck, a plurality of openings in said deck defining gas jets for directing fluid into said fluid bed, plenum means for supplying a gas through said openings and into the area defined by said deck and side walls for fluidizing the material, said openings in said deck comprising a plurality of smaller holes covering substantially the entire surface of the deck and at least one row of larger holes extending longitudinally of said deck, said larger holes and smaller holes being open to the same plenum to provide air of lower velocity through the larger holes than through smaller holes thereby to direct the fluidizing gas in a manner to establish a uniform controlled spouting pattern and thereby circulate and mix the material.
Claim 2
Dependent Claim
164 words
A fluidized bed for agitating and fluidizing particulate material within the fluid bed comprising an elongated deck for receiving the material, a front wall, a rear wall and opposed side walls for said deck to confine the material received on said deck, a plurality of openings in said deck defining gas jets for directing fluid into said fluid bed, plenum means for supplying a gas through said openings and into the area defined by said deck and side walls for fluidizing the material, said openings in said deck comprising a plurality of smaller holes covering substantially the entire surface of the deck and at least one row of larger holes extending longitudinally of said deck, said larger holes and smaller holes being open to the same plenum to provide air of lower velocity through the larger holes than through smaller holes thereby to direct the fluidizing gas in a manner to establish a uniform controlled spouting pattern and thereby circulate and mix the material.
Claim 3
Dependent Claim
25 words
A fluidized bed according to claim 1 wherein a row of larger holes extends longitudinally of the deck adjacent each side wall of the bed.
Claim 4
Dependent Claim
21 words
A fluidized bed according to claim 1 wherein a row of larger holes extends along the longitudinal centerline of the bed.
Claim 5
Dependent Claim
25 words
A fluidized bed according to claim 1 wherein the holes are circular and the larger holes have a diameter twice that of the smaller holes.
Claim 6
Dependent Claim
36 words
A fluid bed according to claim 1, wherein the transverse dimension (w) of the fluid bed and the height of material in the fluid bed (h) form a height/width ratio h/w of between 0.2 and 1.5.
Claim 7
Dependent Claim
43 words
A fluid bed according to claim 1 wherein the width (w) of the fluid bed and the height of material in the bed form a ratio h/w of between 0.2 and 1.5 and wherein the width is not greater than approximately one foot.
Claim 8
Dependent Claim
60 words
A fluid bed according to claim 1 wherein the width of the fluid bed is in excess of approximately one foot and further wherein the fluid bed includes at least one separator plate extending longitudinally of the fluid bed to divide the bed into at least two sections with each section having a height/width ration of between 0.2 and 1.5.
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) | 1976-05-14 | 1976-11-13 | 1977-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-14 | 1980-11-13 | 1981-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-14 | 1984-11-13 | 1985-05-15 | $7700.00 | Window Closed / Lapsed |