Patent US4960473A successfully refreshed from Google Patents.
Patent US3648753A successfully refreshed from Google Patents.
US3648753A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spray dryer air flow control
Assignee: Henningsen Foods Inc
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Filing: 1969-08-13
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Granted: 1972-03-14
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Expires: 1989-08-13
Abstract
Abstract An apparatus and method for providing a uniform cross-sectional air flow for the drying chambers of tunnel-type tray and spray dryers and the freezing chambers of blast freezers by placing guide members having air directing orifices positioned over their surfaces adjacent to the air inlets and outlets of said chambers. Means are provided to introduce the material to be treated and a stream of heated air into the chambers.
Inventors
- 👤 Dwight H Bergquist
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 03:48
CPC Classifications
B; B01; B01D; B01D1/00; B01D1/16; B01D1/18
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
134 words
In an improved spray drying chamber having an elongated horizontal drying chamber extending between an air inlet and an air outlet and having a plurality of spray nozzles beyond said air inlet and a drag means on the chamber floor for removing dried powder in advance of said air outlet the improvement comprising a first air flow controlling plate positioned in the air path intermediate said air inlet and said nozzles, a second air flow controlling plate positioned in the air path between said drag means and said air outlet, and said first and second plates having uniformly spaced orifices throughout for causing a uniform air flow throughout the cross sections of said chamber and providing a low air pressure drop along said chamber as compared with the air pressure drop across said plates.
Claim 2
Dependent Claim
134 words
In an improved spray drying chamber having an elongated horizontal drying chamber extending between an air inlet and an air outlet and having a plurality of spray nozzles beyond said air inlet and a drag means on the chamber floor for removing dried powder in advance of said air outlet the improvement comprising a first air flow controlling plate positioned in the air path intermediate said air inlet and said nozzles, a second air flow controlling plate positioned in the air path between said drag means and said air outlet, and said first and second plates having uniformly spaced orifices throughout for causing a uniform air flow throughout the cross sections of said chamber and providing a low air pressure drop along said chamber as compared with the air pressure drop across said plates.
Claim 3
Dependent Claim
126 words
In an improved spray drying chamber having a generally vertical drying chamber extending between an upper air inlet and a lower air outlet and having a downwardly directed spray nozzle axially positioned below said air inlet for concurrent flow of air and sprayed liquid, the improvement comprising a first air flow controlling plate positioned traversely across the air path intermediate said air inlet and said nozzle, a second air flow controlling plate positioned traversely across the air path above said air outlet, and said first and second plates having uniformly spaced orifices throughout for causing a uniform air flow throughout the cross sections of said chamber and providing a low air pressure drop along said chamber as compared with the air pressure drop across said plates.
Claim 4
Dependent Claim
126 words
In an improved spray drying chamber having a generally vertical drying chamber extending between an upper air inlet and a lower air outlet and having a downwardly directed spray nozzle axially positioned below said air inlet for concurrent flow of air and sprayed liquid, the improvement comprising a first air flow controlling plate positioned traversely across the air path intermediate said air inlet and said nozzle, a second air flow controlling plate positioned traversely across the air path above said air outlet, and said first and second plates having uniformly spaced orifices throughout for causing a uniform air flow throughout the cross sections of said chamber and providing a low air pressure drop along said chamber as compared with the air pressure drop across said plates.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-03-14 | 1975-09-13 | 1976-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-03-14 | 1979-09-13 | 1980-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-03-14 | 1983-09-13 | 1984-03-14 | $7700.00 | Window Closed / Lapsed |