US3793745A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aggregate dryer
Assignee: Individual
•
Filing: 1973-03-19
•
Granted: 1974-02-26
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Expires: 1993-03-19
Abstract
Abstract A plurality of elongated conveyors are arranged in two vertical stacks disposed side-by-side the conveyors of the first stack being spaced apart vertically and inclined upward in one direction and the conveyors of the second stack being spaced apart vertically and inclined upward in the opposite direction. The upper, outfeed end of each conveyor is positioned vertically above, but to the side of, the lower, infeed end of the next adjacent conveyor, in the downstream direction of movement of aggregate through the conveyors, and a side chute communicates the upper, outfeed end of each conveyor with the lower, infeed end of the next adjacent downstream conveyor. A source of heat is associated with the conveyors, and the assembly is confined in a housing provided with an aggregate inlet communicating with the lower, infeed end of the lowermost conveyor, an aggregate outlet communicating with the upper, outfeed end of the uppermost conveyor, and a vapor outlet at the upper end of the housing. Aggregate material thus is conveyed upward alternately through the conveyor stacks while being heated sufficiently to vaporize its moisture content.
Inventors
- 👤 D Myers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 09:46
CPC Classifications
F; F26; F26B; F26B17/00; F26B17/02; F26B17/08
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
220 words
Apparatus for drying aggregate material, comprising a. a plurality of elongated first conveyors spaced apart vertically and forming a first stack of conveyors, said first conveyors being inclined in one direction for moving aggregate material upwardly from the lower, infeed end to the upper, outfeed end, b. a plurality of elongated second conveyors spaced apart vertically and forming a second stack of conveyors, said secOnd conveyors being inclined in the direction opposite the inclination of the first conveyors for moving aggregate material upwardly from the lower, infeed end to the upper, outfeed end, c. the first and second stacks of conveyors being disposed sideby-side with the upper, outfeed end of each conveyor located above the lower, infeed end of the next adjacent downstream conveyor, d. side conveyor means communicating the upper, outfeed end of each conveyor with the lower, infeed end of the next adjacent downstream conveyor, e. a housing enclosing the assembly of conveyors, f. aggregate inlet means communicating through the housing with the lower, infeed end of the lowermost conveyor, g. aggregate outlet means communicating through the housing with the upper, outfeed end of the uppermost conveyor, h. a vapor discharge outlet at the upper end of the housing, and i. heater means in the housing for heating aggregate as it is moved toward the aggregate outlet means.
Claim 2
Dependent Claim
220 words
Apparatus for drying aggregate material, comprising a. a plurality of elongated first conveyors spaced apart vertically and forming a first stack of conveyors, said first conveyors being inclined in one direction for moving aggregate material upwardly from the lower, infeed end to the upper, outfeed end, b. a plurality of elongated second conveyors spaced apart vertically and forming a second stack of conveyors, said secOnd conveyors being inclined in the direction opposite the inclination of the first conveyors for moving aggregate material upwardly from the lower, infeed end to the upper, outfeed end, c. the first and second stacks of conveyors being disposed sideby-side with the upper, outfeed end of each conveyor located above the lower, infeed end of the next adjacent downstream conveyor, d. side conveyor means communicating the upper, outfeed end of each conveyor with the lower, infeed end of the next adjacent downstream conveyor, e. a housing enclosing the assembly of conveyors, f. aggregate inlet means communicating through the housing with the lower, infeed end of the lowermost conveyor, g. aggregate outlet means communicating through the housing with the upper, outfeed end of the uppermost conveyor, h. a vapor discharge outlet at the upper end of the housing, and i. heater means in the housing for heating aggregate as it is moved toward the aggregate outlet means.
Claim 3
Dependent Claim
51 words
The apparatus of claim 1 wherein each conveyor comprises an elongated trough, and driven endless belt means supported at its opposite ends and mounting a plurality of spaced conveyor flights projecting outward therefrom, the lower stretch of said belt means being arranged adjacent the trough for movement of the flights therethrough.
Claim 4
Dependent Claim
42 words
The apparatus of claim 2 wherein each belt means comprises a pair of laterally spaced chains formed of a plurality of pivotally interconnected links, the conveyor flights extending between the pair of chains and being connected to a link of each chain.
Claim 5
Dependent Claim
33 words
The apparatus of claim 2 wherein the heater means comprises an elongated heater mounted above and substantially parallel to each conveyor trough between the upper and lower stretches of the associated belt means.
Claim 6
Dependent Claim
35 words
The apparatus of claim 4 wherein the heater means includes an elongated heater guard of inverted V-shape overlying the heater for directing aggregate falling from the upper stretch of the belt means into the trough.
Claim 7
Dependent Claim
13 words
The apparatus of claim 1 wherein each side conveyor means comprises a chute.
Claim 8
Dependent Claim
29 words
The apparatus of claim 1 including means associated with at least the side conveyor means in the upper portion of the housing for maintaining choke feeding of aggregate material.
Claim 9
Dependent Claim
41 words
The apparatus of claim 1 including level sensing means in at least the side conveyor means in the upper portion of the housing operable to control the speed of the next adjacent downstream conveyor for maintaining choke feeding of aggregate material.
Claim 10
Dependent Claim
47 words
The apparatus of claim 2 including temperature sensing means in at least the side conveyor means in the upper portion of the housing operable to control the speed of all of said elongated conveyors simultaneously for maintaining the outfeed of aggregate material at predetermined dryness and temperature.
Claim 11
Dependent Claim
143 words
The apparatus of claim 1 wherein a. each conveyor comprises an elongated trough, and driven endless belt means supported at its opposite ends and mounting a plurality of spaced conveyor flights projecting outward therefrom, the lower stretch of said belt means being arranged adjacent the trough from movement of the flights therethrough, b. each side conveyor means comprises a chute, c. the heater means comprises electric heater means mounted above each conveyor trough between the upper and lower stretches of the associated belt means, and an elongated heater guard of inverted V-shape overlying the heater means and extending sutstantially parallel to the trough for directing aggregate falling from the upper stretch of the belt means into the trough, and d. means is associated with at least the side chutes in the upper portion of the housing for maintaining choke feeding of aggregate material.
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) | 1977-02-25 | 1977-08-27 | 1978-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-25 | 1981-08-27 | 1982-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-25 | 1985-08-27 | 1986-02-26 | $7700.00 | Window Closed / Lapsed |