Patent US3758652A successfully refreshed from Google Patents.
US3758652A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cilitate cooling forming cooling channels in hot thermally bloated ceramic block to fa
Assignee: Sentralinstitutt for Industriell Forskning
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Filing: 1971-05-13
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Granted: 1973-09-11
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Expires: 1991-05-13
Abstract
Abstract To facilitate more rapid cooling while avoiding cracking in thermally bloated ceramic block, such as foamed clay, glass, slag, etc. channels are drilled through the block after the surface has solidified and cooling air is then blown through these channels in a controlled manner.
Inventors
- 👤 A Jebens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 06:34
CPC Classifications
C; C03; C03B; C03B19/00; C03B19/08; C04; C04B; C04B38/00; C04B38/06; C04B38/063; C04B38/0635; C04B38/064
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
119 words
A method for producing elements of inorganic foam material from a material selected from the group consisting of argillaceous material, glass powder, aggregatEs thereof and slag, comprising heating said material to fusion and expansion to form a block, and then cooling the block, the improvement therein comprising forming internal cooling channels in said block after the block has achieved dimensional stability, then passing a cooling gas along the side surfaces of the block and through said channels until the channel walls have reached substantially the same temperature as said surfaces, and continuing the cooling at a cooling rate which is kept substantially proportional to the heat conductivity of the foam material, until temperature equalization at ambient temperature takes place.
Claim 2
Independent Claim
119 words
A method for producing elements of inorganic foam material from a material selected from the group consisting of argillaceous material, glass powder, aggregatEs thereof and slag, comprising heating said material to fusion and expansion to form a block, and then cooling the block, the improvement therein comprising forming internal cooling channels in said block after the block has achieved dimensional stability, then passing a cooling gas along the side surfaces of the block and through said channels until the channel walls have reached substantially the same temperature as said surfaces, and continuing the cooling at a cooling rate which is kept substantially proportional to the heat conductivity of the foam material, until temperature equalization at ambient temperature takes place.
Claim 3
Dependent Claim
23 words
A method as claimed in claim 1 wherein said block is equipped with channels before it is completely solidified in its interior part.
Claim 4
Dependent Claim
37 words
A method as claimed in claim 2 wherein said block is equipped with channels simultaneously as it is discharged from a productional kiln, and then transferring said block immediately thereafter to the cooling kiln for controlled cooling.
Claim 5
Dependent Claim
30 words
A method as claimed in claim 2 wherein said channels are flushed with air at the same temperature as the air by which the surfaces of said block are cooled.
Claim 6
Dependent Claim
28 words
A method as claimed in claim 1 wherein said block is equipped with channels after the solidification thereof but before temperature equalization at handling temperature has taken place.
Claim 7
Dependent Claim
55 words
A method as claimed in claim 1 wherein said block is eqiupped with channels after solidification of its outer parts by means of tools which are kept at such a temperature that the inner part of the block solidifies locally around said tools without resulting in complete solidification of the inner part of said block.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-09-10 | 1977-03-12 | 1977-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-10 | 1981-03-12 | 1981-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-10 | 1985-03-12 | 1985-09-11 | $7700.00 | Window Closed / Lapsed |