US4240587A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for recycling tires and similarly compounded materials to recover usable constituents
Assignee: Individual
•
Filing: 1978-05-31
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Granted: 1980-12-23
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Expires: 1998-05-31
Abstract
Abstract A processing plant and method for processing scrap tires and similar materials containing a mixture of technical rubber, scrap metal and tire cord in which the plant is essentially vehicular and thus eliminates the necessity of hauling accumulated tires long distances with the accompanying costs; and the plant includes means for directing mixed tire sizes to a cyrogenic section where the technical rubber is reduced to a sufficient temperature making it brittle so that initial separation of reusable technical rubber is accomplished; the plant being operated essentially on the reusable by-products of pyrolytic reduction of the tires so that hydrocarbons and heated gas are utilized and additional commercial by-products such as commercial soots, metal and tire beads are obtained.
Inventors
- 👤 Walter Letsch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 05:27
CPC Classifications
B; B29; B29B; B29B17/00; B29B17/02; B29B17/0206; C; C09; C09C; C09C1/00; C09C1/44; C09C1/48; C09C1/482; B29B17/04; B29B17/0404; B29B17/0408; B29B2017/0094; B29B2017/0416; B29B2017/0424; B29B2017/0488; B29B2017/0496; B29K; B29K2021/00; B29K2105/00; B29K2105/06; B29K2705/00; B29L; B29L2030/00; Y; Y02; Y02W; Y02W30/00; Y02W30/50; Y02W30/62; Y10; Y10S; Y10S241/00; Y10S241/31; Y10S241/37
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
173 words
The method of recovering reusable portions of used tires and similar rubber-compounded scrap materials containing technical rubber, metal and cord, comprising the steps of: A. supplying scrap material primarily comprising used tires and portions thereof to a cyrogenic treatment section of a vehicular plant; B. substantially, uniformly cooling the scrap material, by using cyrogenic gases to a relatively minimum temperature at which the scrap can be crushed and recoverable-granulates can be formed; C. crushing the scrap material and separating rubber granulates and forming a residue comprising the remaining scrap including a mixture of rubber adhering to metal, metal beads and belts, cords comprising both synthetic and natural fibers; D. pyrolytically-reducing the residue and producing incompletely burned, high-energy gases, including hydrocarbons, soots and scrap metal; E. separating the scrap metal and soots; and F. condensing said high energy gases and recovering a pyrolytic oil and operating a power plant with a portion of the gases and converting the gas energy to mechanical energy and operating conveying, cooling, crushing and separating components of said plant.
Claim 2
Independent Claim
173 words
The method of recovering reusable portions of used tires and similar rubber-compounded scrap materials containing technical rubber, metal and cord, comprising the steps of: A. supplying scrap material primarily comprising used tires and portions thereof to a cyrogenic treatment section of a vehicular plant; B. substantially, uniformly cooling the scrap material, by using cyrogenic gases to a relatively minimum temperature at which the scrap can be crushed and recoverable-granulates can be formed; C. crushing the scrap material and separating rubber granulates and forming a residue comprising the remaining scrap including a mixture of rubber adhering to metal, metal beads and belts, cords comprising both synthetic and natural fibers; D. pyrolytically-reducing the residue and producing incompletely burned, high-energy gases, including hydrocarbons, soots and scrap metal; E. separating the scrap metal and soots; and F. condensing said high energy gases and recovering a pyrolytic oil and operating a power plant with a portion of the gases and converting the gas energy to mechanical energy and operating conveying, cooling, crushing and separating components of said plant.
Claim 3
Dependent Claim
33 words
The method of claim 1 including the step of salvaging the exhaust gases from the power plant heat to pyrolytically assist to reduce the residue, for salvaging heat generated by the power plant.
References Cited (Backward Citations)
US4025990A
Cited
US4081143A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-12-23 | 1984-06-23 | 1984-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-12-23 | 1988-06-23 | 1988-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-12-23 | 1992-06-23 | 1992-12-23 | $7700.00 | Window Closed / Lapsed |