US3565168A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cone dryer
Assignee: Pennwalt Corp
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Filing: 1969-04-01
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Granted: 1971-02-23
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Expires: 1989-04-01
Abstract
Abstract A come dryer having an extended surface heat transfer platen in the form of an annular cylindrical jacket suspended in concentrically spaced disposition from the inner walls of the dryer. The increased heat transfer area supplements the original dryer contact surface while the cylindrical annulus impedes the fall of product material so as to provide superior blending action and quicker drying times.
Inventors
- 👤 Harold R Powell
- 👤 Daniel P Sweeney
- 👤 Warner C Haas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:41
CPC Classifications
F; F26; F26B; F26B11/00; F26B11/02; F26B11/04; F26B11/049; F26B11/0445; Y; Y10; Y10S; Y10S165/00; Y10S165/135; Y10S165/139; Y10S165/14; Y10S165/141; Y10S165/142
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
150 words
A cone dryer comprising an external shell having a medial cylindrical portion and outwardly diverging conical portions including a jacket defined by coaxially disposed inner and outer walls, a hollow substantially cylindrical annulus supported within said external shell and concentrically spaced from the inner wall of the medial cylindrical portion, a plurality of circumferentially spaced, longitudinally extending heatconductive ribs radially disposed between the outer surface of said cylindrical annulus and the inner wall of the medial cylindrical portion, means for rotating said external shell, said heat-conductive ribs extending along at least a substantial portion of the length of said annulus, and means for circulating a heating medium through said annulus and said jacket whereby said annulus and said ribs extend the heat transfer contact surface for material being dried and at the same time impede the fall of product material therebetween to provide superior blending action and quicker drying time.
Claim 2
Dependent Claim
150 words
A cone dryer comprising an external shell having a medial cylindrical portion and outwardly diverging conical portions including a jacket defined by coaxially disposed inner and outer walls, a hollow substantially cylindrical annulus supported within said external shell and concentrically spaced from the inner wall of the medial cylindrical portion, a plurality of circumferentially spaced, longitudinally extending heatconductive ribs radially disposed between the outer surface of said cylindrical annulus and the inner wall of the medial cylindrical portion, means for rotating said external shell, said heat-conductive ribs extending along at least a substantial portion of the length of said annulus, and means for circulating a heating medium through said annulus and said jacket whereby said annulus and said ribs extend the heat transfer contact surface for material being dried and at the same time impede the fall of product material therebetween to provide superior blending action and quicker drying time.
Claim 3
Dependent Claim
36 words
The cone dryer of claim 1 wherein the hollow interior of the annulus is baffled to define a tortuous passageway therein, the passageway being divided into channels which diverge toward the ends of the cylindrical annulus.
Claim 4
Dependent Claim
28 words
The cone dryer of claim 2 wherein said jacket includes a series of circumferential conduits which cOnverge from the apices of the conical portions toward the cylindrical portion.
Claim 5
Dependent Claim
17 words
The cone dryer of claim 1 wherein said ribs are of gull winged configuration in cross section.
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) | 1974-02-22 | 1974-08-24 | 1975-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-22 | 1978-08-24 | 1979-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-22 | 1982-08-24 | 1983-02-23 | $7700.00 | Window Closed / Lapsed |