US3618540A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Integrated waste-conversion equipment
Assignee: WALS Inc
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Filing: 1970-03-16
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Granted: 1971-11-09
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Expires: 1990-03-16
Abstract
Abstract A machine for converting waste material. The machine includes a drier with provision for burning the gaseous discharge produced by the drying process. Dried and partially dried material is recirculated in a rotative drum subject to heat to maintain a workable consistency in the material. Some of the dried material is utilized as fuel, or is otherwise reduced to ashes.
Inventors
- 👤 Harvey M Wenger
- 👤 Norman E Archer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:34
CPC Classifications
F; F23; F23G; F23G7/00; F23G7/001; F23G5/00; F23G5/20; F23G5/22
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
157 words
A waste-processing machine having a housing, a drum rotatably mounted in said housing in an attitude such that a plane tangent to the bottom of said drum is inclined to the horizontal, a hopper adjacent the lower end of said drum, a screen on said drum disposed to limit the size of particles proceeding from said drum to said hopper, charging means adapted to project particles of waste material into said drum, a heating chamber surrounding at least a portion of said drum, recirculating conveyor means adapted to transfer material from said hopper to said charging means, and discharge conveyor means adapted to remove material from said hopper, wherein the improvement comprises: a second hopper disposed to receive raw material and material moving over the lower end of said screen, said second hopper communicating with inlet means and with the intake of said charging means; and a receiving bin disposed to receive material from said discharge conveyor.
Claim 2
Dependent Claim
157 words
A waste-processing machine having a housing, a drum rotatably mounted in said housing in an attitude such that a plane tangent to the bottom of said drum is inclined to the horizontal, a hopper adjacent the lower end of said drum, a screen on said drum disposed to limit the size of particles proceeding from said drum to said hopper, charging means adapted to project particles of waste material into said drum, a heating chamber surrounding at least a portion of said drum, recirculating conveyor means adapted to transfer material from said hopper to said charging means, and discharge conveyor means adapted to remove material from said hopper, wherein the improvement comprises: a second hopper disposed to receive raw material and material moving over the lower end of said screen, said second hopper communicating with inlet means and with the intake of said charging means; and a receiving bin disposed to receive material from said discharge conveyor.
Claim 3
Dependent Claim
20 words
A machine as defined in claim 1, wherein said drum is tapered, the larger end thereof being adjacent said hopper.
Claim 4
Dependent Claim
16 words
A machine as defined in claim 2, wherein the top of said drum is substantially horizontal.
Claim 5
Dependent Claim
25 words
A machine as defined in claim 3, additionally including a firepot disposed below the smaller end of said drum and communicating with said heating chamber.
Claim 6
Dependent Claim
31 words
A machine as defined in claim 1, wherein said screen includes at least one annular screen means secured to said drum in a configuration forming a continuation of the surface thereof.
Claim 7
Dependent Claim
29 words
A machine as defined in claim 1, additionally including stoker means adapted to transfer material from said bin to said combustion chamber and burn the material so transferred therein.
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) | 1974-11-08 | 1975-05-10 | 1975-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-08 | 1979-05-10 | 1979-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-08 | 1983-05-10 | 1983-11-09 | $7700.00 | Window Closed / Lapsed |