US3807355A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluidizing bed tank
Assignee: Westinghouse Electric Corp
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Filing: 1972-03-28
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Granted: 1974-04-30
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Expires: 1992-03-28
Abstract
Abstract A fluidizing bed tank is disclosed which has vertical walls enclosing a space, a horizontal porous gas diffuser plate between the walls, means for providing gas beneath the diffuser plate, and at least one horizontal protective screen between the walls and above the diffuser plate. The uppermost screen is at least about two-thirds of the distance down from the top of the tank to the diffuser plate. A second screen is preferably used when the heavy articles are to be coated.
Inventors
- 👤 N Goldberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:11
CPC Classifications
B; B05; B05C; B05C19/00; B05C19/02; Y; Y10; Y10S; Y10S118/00; Y10S118/05
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
83 words
A fluidizing bed tank comprising: a. vertical walls enclosing a space; b. a horizontal porous gas diffuser plate between said walls; c. means for providing gas beneath said diffuser plate; d. a lowermost horizontal protective screen between said walls above said diffuser plate but not in contact therewith, and having a porosity greater than said diffuser plate, and e. an uppermost horizontal protective screen between said walls above said lowermost horizontal protective screen, having a porosity greater than said lowermost horizontal protective screen.
Claim 2
Dependent Claim
83 words
A fluidizing bed tank comprising: a. vertical walls enclosing a space; b. a horizontal porous gas diffuser plate between said walls; c. means for providing gas beneath said diffuser plate; d. a lowermost horizontal protective screen between said walls above said diffuser plate but not in contact therewith, and having a porosity greater than said diffuser plate, and e. an uppermost horizontal protective screen between said walls above said lowermost horizontal protective screen, having a porosity greater than said lowermost horizontal protective screen.
Claim 3
Dependent Claim
36 words
A fluidizing bed tank according to claim 1 wherein the openings in said lowermost screen are about one-sixteenth to about 1/2 inch and the openings in said uppermost screen are about 1/2 to about 6 inches.
Claim 4
Dependent Claim
20 words
A fluidizing bed tank according to claim 1 wherein each screen is detachably mounted on support members fixed to walls.
Claim 5
Dependent Claim
23 words
A fluidizing bed tank according to claim 1 wherein said walls extend about 2 inches to about 15 feet above said diffuser plate.
Claim 6
Dependent Claim
30 words
A fluidizing bed tank according to claim 1 wherein each screen has sufficient strength to catch without breaking a one pound steel ball dropped from a height of 1 foot.
Claim 7
Dependent Claim
34 words
A fluidizing bed tank according to claim 1 wherein the screen which is lowermost is about 1/2 to about 1 1/2 inches above said diffuser plate per foot of shortest distance between said walls.
Claim 8
Dependent Claim
14 words
A fluidizing bed tank according to claim 1 wherein each screen is welded wire.
Claim 9
Dependent Claim
13 words
A fluidizing bed tank according to claim 1 wherein each screen is steel.
Claim 10
Dependent Claim
20 words
A fluidizing bed tank according to claim 1 wherein the distance between said screens is up to about 6 inches.
Claim 11
Dependent Claim
21 words
A fluidizing bed tank according to claim 1 wherein said lowermost screen is fixed to the bottom of said uppermost screen.
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) | 1977-04-29 | 1977-10-29 | 1978-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-29 | 1981-10-29 | 1982-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-29 | 1985-10-29 | 1986-04-30 | $7700.00 | Window Closed / Lapsed |