US3696934A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for centrifugally separating impurities from fluid suspensions
Assignee: Individual
•
Filing: 1968-01-24
•
Granted: 1972-10-10
•
Expires: 1988-01-24
Abstract
Abstract An apparatus for removing objectionable impurities from a fluid suspension of pulp or paper-making material in the manufacture of paper. The apparatus comprises a cylindrical separating chamber through which flows a fluid suspension vortex containing high and low density impurities whereby the impurities are centrifugally separated as a function of their density. The most dense impurities are flung radially outwardly from the fluid suspension vortex whereby they are entrained and carried away by a water vortex which encircles the fluid suspension vortex and advances through the separating chamber in a direction opposite to that of the fluid suspension vortex.
Inventors
- 👤 Saburo Oisi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:54
CPC Classifications
B; B01; B01D; B01D21/00; B01D21/26; B01D21/267; D; D21; D21D; D21D5/00; D21D5/18
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
213 words
An apparatus for separating both high and low density impurities from a fluid suspension comprising: means defining an elongated separating chamber; fluid suspension flow means for longitudinally flowing a fluid suspension vortex containing high and low density impurities therein through substantially the entire length of said separating chamber in a given direction to effect radial separation of the impurities as a function of their density; water flow means for longitudinally flowing a water vortex through substantially the entire length of said separating chamber in a direction opposite to said given direction encircling said fluid suspension vortex to effect removal of the high density impurities; removal means disposed at one end of said separating chamber for removing tHerefrom the water and high density impurities; means disposed at the other end of said separating chamber for separately removing the fluid suspension and the low density impurities said last-mentioned means including means defining a central aperture in said other end, a first tubular section in communication with said aperture to receive therein the fluid suspension, and a second tubular section coaxial with said first tubular section and extending into said separating chamber dimensioned to receive therein the low density impurities which are too light to be radially separated during the flow of said fluid suspension vortex.
Claim 2
Independent Claim
213 words
An apparatus for separating both high and low density impurities from a fluid suspension comprising: means defining an elongated separating chamber; fluid suspension flow means for longitudinally flowing a fluid suspension vortex containing high and low density impurities therein through substantially the entire length of said separating chamber in a given direction to effect radial separation of the impurities as a function of their density; water flow means for longitudinally flowing a water vortex through substantially the entire length of said separating chamber in a direction opposite to said given direction encircling said fluid suspension vortex to effect removal of the high density impurities; removal means disposed at one end of said separating chamber for removing tHerefrom the water and high density impurities; means disposed at the other end of said separating chamber for separately removing the fluid suspension and the low density impurities said last-mentioned means including means defining a central aperture in said other end, a first tubular section in communication with said aperture to receive therein the fluid suspension, and a second tubular section coaxial with said first tubular section and extending into said separating chamber dimensioned to receive therein the low density impurities which are too light to be radially separated during the flow of said fluid suspension vortex.
Claim 3
Independent Claim
292 words
An apparatus for separating both high and low density impurities from a fluid suspension comprising: means defining an elongated separating chamber; fluid suspension flow means for longitudinally flowing a fluid suspension vortex containing high and low density impurities therein through substantially the entire length of said separating chamber in a given direction to effect radial separation of the impurities as a function of their density; water flow means for longitudinally flowing a water vortex through substantially the entire length of said separating chamber in a direction opposite to said given direction encircling said fluid suspension vortex to effect removal of the high density impurities; removal means disposed at one end of said separating chamber for removing therefrom the water and high density impurities; means disposed at the other end of said separating chamber for separately removing the fluid suspension and the low density impurities, said fluid suspension flow means comprising a head portion having a convergingly tapered portion connected to said separating chamber at said one end, and means for tangentially supplying the fluid suspension into said head portion; said water flow means comprising another head portion connected to said separating chamber at said other end, and means for tangentially supplying the water into said another head portion, said means for separately removing the fluid suspension and the low density impurities comprising means defining an aperture in said another head portion, a first tubular section in communication with said aperture to receive therein the fluid suspension, and a second tubular section coaxial with said first tubular section and extending through said another head portion into said separating chamber dimensioned to receive therein the low density impurities which are too light to be radially separated during the flow of said fluid suspension vortex.
Claim 4
Independent Claim
292 words
An apparatus for separating both high and low density impurities from a fluid suspension comprising: means defining an elongated separating chamber; fluid suspension flow means for longitudinally flowing a fluid suspension vortex containing high and low density impurities therein through substantially the entire length of said separating chamber in a given direction to effect radial separation of the impurities as a function of their density; water flow means for longitudinally flowing a water vortex through substantially the entire length of said separating chamber in a direction opposite to said given direction encircling said fluid suspension vortex to effect removal of the high density impurities; removal means disposed at one end of said separating chamber for removing therefrom the water and high density impurities; means disposed at the other end of said separating chamber for separately removing the fluid suspension and the low density impurities, said fluid suspension flow means comprising a head portion having a convergingly tapered portion connected to said separating chamber at said one end, and means for tangentially supplying the fluid suspension into said head portion; said water flow means comprising another head portion connected to said separating chamber at said other end, and means for tangentially supplying the water into said another head portion, said means for separately removing the fluid suspension and the low density impurities comprising means defining an aperture in said another head portion, a first tubular section in communication with said aperture to receive therein the fluid suspension, and a second tubular section coaxial with said first tubular section and extending through said another head portion into said separating chamber dimensioned to receive therein the low density impurities which are too light to be radially separated during the flow of said fluid suspension vortex.
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) | 1975-10-10 | 1976-04-10 | 1976-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-10 | 1980-04-10 | 1980-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-10 | 1984-04-10 | 1984-10-10 | $7700.00 | Window Closed / Lapsed |