US3894692A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and apparatus for the preparation of asbestos cement suspension
Assignee: Individual
•
Filing: 1974-05-23
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Granted: 1975-07-15
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Expires: 1994-05-23
Abstract
Abstract A process for the preparation of an asbestos cement suspension and an apparatus for carrying out the process. In the process, cement clinker and gypsum are comminuted together in an aqueous medium. The apparatus includes a cylindrical housing rotatable on journals with the housing accommodating chambers, two of which are provided with apertured interchambers and outlet partition walls, respectively, thereby forming a drum ball mill. The mill adjoins one of the end walls of the housing connected to a feeder for supplying the starting materials. A third chamber is provided which is separated by the ball mill by a partition wall having a central opening and is located adjacent to the opposite end of the housing connected to a feeder supplying asbestos. The third chamber wet fluffs the asbestos.
Inventors
- 👤 Leonid Yakovlevich Sanko
- 👤 Eduard Alexeevich Valjukov
- 👤 Jury Semenovich Grizak
- 👤 Alexandr Grigorievich Naumov
- 👤 Vasily Denisovich Lysenko
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 05:34
CPC Classifications
B; B28; B28C; B28C5/00; B28C5/40; B28C5/404; B28C5/406; B02; B02C; B02C17/00; B02C17/04; B02C17/06
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
33 words
A PROCESS FOR THE PREPARATION OF ASBESTOS CEMENT SUSPENSIONS COMPRISING THE STEPS OF: COMMINUTING CEMENT CLINKERS AND GYPSUM TOGETHER IN AN AQUEOUS MEDIUM, SIMULTANEOUSLY WET FLUFFING ASBESTOS, AND SUBSEQUENTLY MIXING THE PREPARED COMPONENTS.
Claim 2
Dependent Claim
33 words
A PROCESS FOR THE PREPARATION OF ASBESTOS CEMENT SUSPENSIONS COMPRISING THE STEPS OF: COMMINUTING CEMENT CLINKERS AND GYPSUM TOGETHER IN AN AQUEOUS MEDIUM, SIMULTANEOUSLY WET FLUFFING ASBESTOS, AND SUBSEQUENTLY MIXING THE PREPARED COMPONENTS.
Claim 3
Dependent Claim
28 words
A process according to claim 1, comprising: adding wastes from the manufacture of asbestos cement into the mixture during the combined comminution of the cement clinkers and gypsum.
Claim 4
Independent Claim
247 words
An apparatus for the preparation of asbestos cement suspension comprising: a cylindrical housing; journals for rotatably mounting said housing; two chambers accommodated in said housing forming a drum ball mill for the combined comminution of cement clinker and gypsum said chambers adjoining one end wall of said housing; a feeder for supplying starting materials connected to said end wall of said housing; a third chamber located adjacent to the opposite end of said housing, said chamber constituting means for the wet fluffing of asbestos; a feeder for supplying asbestos connected to said opposite end of the housing; still another chamber located between said above-mentioned chambers serving for the mixing of the prepared components, said chamber having at least two openings in the walls thereof for discharging the prepared suspension; mixing blades covering said openings in the walls of said last-mentioned mixing chambers, the number of said blades corresponding to the number of said openings; a stationary mounted casing accommodating said mixing chamber and a discharge socket pipe in said casing; an interchamber apertured partition wall and an outlet apertured partition wall being provided between the chambers of the drum mill and at the outlet thereof, respectively, and a partition wall having a central outlet opening being provided between the chamber for the wet fluffing of asbestos and the mixing chambers; all said partition walls ensuring the passage of the material from one chamber into another during the preparation of asbestos cement suspension towards said discharge socket pipe.
Claim 5
Independent Claim
247 words
An apparatus for the preparation of asbestos cement suspension comprising: a cylindrical housing; journals for rotatably mounting said housing; two chambers accommodated in said housing forming a drum ball mill for the combined comminution of cement clinker and gypsum said chambers adjoining one end wall of said housing; a feeder for supplying starting materials connected to said end wall of said housing; a third chamber located adjacent to the opposite end of said housing, said chamber constituting means for the wet fluffing of asbestos; a feeder for supplying asbestos connected to said opposite end of the housing; still another chamber located between said above-mentioned chambers serving for the mixing of the prepared components, said chamber having at least two openings in the walls thereof for discharging the prepared suspension; mixing blades covering said openings in the walls of said last-mentioned mixing chambers, the number of said blades corresponding to the number of said openings; a stationary mounted casing accommodating said mixing chamber and a discharge socket pipe in said casing; an interchamber apertured partition wall and an outlet apertured partition wall being provided between the chambers of the drum mill and at the outlet thereof, respectively, and a partition wall having a central outlet opening being provided between the chamber for the wet fluffing of asbestos and the mixing chambers; all said partition walls ensuring the passage of the material from one chamber into another during the preparation of asbestos cement suspension towards said discharge socket pipe.
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) | 1978-07-14 | 1979-01-13 | 1979-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-14 | 1983-01-13 | 1983-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-14 | 1987-01-13 | 1987-07-15 | $7700.00 | Window Closed / Lapsed |