US3834862A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for producing pellets of expanded clay
Assignee: Individual
•
Filing: 1973-05-14
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Granted: 1974-09-10
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Expires: 1993-05-14
Abstract
Abstract An apparatus for producing pellets of expanded burnt clay comprises two rotary kilns, a drying kiln and a burning kiln which are arranged in such a way that they do not merge into each other centrally; the longitudinal axes thereof are offset vertically in an intermediate transition housing. The transition housing is provided with means for discharging material therefrom and supplying material thereto.
Inventors
- 👤 K Eliasson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:16
CPC Classifications
F; F27; F27B; F27B7/00; F27B7/02; C; C04; C04B; C04B20/00; C04B20/02; C04B20/04; C04B20/06; C04B20/061; C04B14/00; C04B14/02; C04B14/04; C04B14/10
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
300 words
An apparatus for producing pellets of expanded burnt clay from a composition comprising wet raw clay material which expands and forms porous bodies when heated above 1,000*C. comprising a. a first rotary kiln sloping downwardly from a material inlet end thereof to a material outlet end thereof, arranged as a drying kiln for drying and disintegrating said composition comprising a wet raw clay material, b. a second rotary kiln sloping downwardly from a material inlet end thereof to a material outlet end thereof which is arranged as a burning kiln for expanding and burning a composition comprising an expandable clay material at temperatures above 1,000*C., said kilns having means for providing a heat flow continuously opposed to the flow of material through the kilns, c. a transition housing arranged between the outlet end of the first kiln and the inlet end of the second kiln comprising material transport means between said ends, the axes of the two kilns being offset vertically in relation to each other in the transition housing, said transition housing containing transfer means, discharge means, and supply means, said transfer means having means controllably operable to transfer material, by gravity, in whole or in part from the outlet end to the first kiln to the inlet end of the second kiln or to said discharge means, said discharge means operable to discharge material from said transition housing to the outside of the apparatus, said supply means being separate from and independently operable from said discharge means and operable to supply other material from outside the apparatus through said transition housing to the inlet end of the second kiln, said discharge means and said supply means having material locks for continued transfer of heat energy dispelled from the second kiln to the first kiln through the transition housing.
Claim 2
Independent Claim
300 words
An apparatus for producing pellets of expanded burnt clay from a composition comprising wet raw clay material which expands and forms porous bodies when heated above 1,000*C. comprising a. a first rotary kiln sloping downwardly from a material inlet end thereof to a material outlet end thereof, arranged as a drying kiln for drying and disintegrating said composition comprising a wet raw clay material, b. a second rotary kiln sloping downwardly from a material inlet end thereof to a material outlet end thereof which is arranged as a burning kiln for expanding and burning a composition comprising an expandable clay material at temperatures above 1,000*C., said kilns having means for providing a heat flow continuously opposed to the flow of material through the kilns, c. a transition housing arranged between the outlet end of the first kiln and the inlet end of the second kiln comprising material transport means between said ends, the axes of the two kilns being offset vertically in relation to each other in the transition housing, said transition housing containing transfer means, discharge means, and supply means, said transfer means having means controllably operable to transfer material, by gravity, in whole or in part from the outlet end to the first kiln to the inlet end of the second kiln or to said discharge means, said discharge means operable to discharge material from said transition housing to the outside of the apparatus, said supply means being separate from and independently operable from said discharge means and operable to supply other material from outside the apparatus through said transition housing to the inlet end of the second kiln, said discharge means and said supply means having material locks for continued transfer of heat energy dispelled from the second kiln to the first kiln through the transition housing.
Claim 3
Dependent Claim
23 words
An apparatus, as in claim 1, wherein there is arranged in the transition housing a burner operating towards and into the drying kiln.
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) | 1977-09-09 | 1978-03-11 | 1978-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-09 | 1982-03-11 | 1982-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-09 | 1986-03-11 | 1986-09-10 | $7700.00 | Window Closed / Lapsed |