Patent US3554380A successfully refreshed from Google Patents.
US3554380A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for preparing thick pulp
Assignee: Individual
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Filing: 1968-03-06
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Granted: 1971-01-12
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Expires: 1988-03-06
Abstract
Abstract A device is provided for preparing thick pulp including a tank supplied from above with suspension and containing a submerged filter element therein. The filter element communicates with a pulsation chamber which receives filtered liquid, and a vertical discharge pipe is connected to the pulsation chamber and has an expanded discharge chamber at its end remote from the pulsation chamber at a level thereabove. A pulsation is connected to the pulsation chamber for producing periodic pressure pulses to discharge filtered liquid from the discharge chamber and to force filtered liquid in the pulsation chamber back through the filter element.
Inventors
- 👤 Susanna Mikhailovna Karpacheva
- 👤 Jury Georgievich Karkhachev
- 👤 Valerian Matveevich Muratov
- 👤 Leonid Solomonovich Raginsky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:35
CPC Classifications
B; B01; B01D; B01D29/00; B01D29/11; B01D29/114; B01D29/62; B01D29/66; B01D29/666; B01D2201/00; B01D2201/28; B01D2201/287
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
118 words
A device for preparing thick pulp, comprising: a tank for suspension supplied thereinto; a filtering element submerged for filtering the suspension therein in said tank; a pulsation chamber communicating with said filtering element for receiving liquid filtered through said filtering element; a pipe connected to said pulsation chamber for draining from said pulsation chamber filtered liquid; an expanded drain chamber arranged at the end of said pipe remote from the pulsation chamber, said drain chamber being disposed above the portion of the pulsation chamber to be filled with filtered liquid; and means for applying periodic pressure pulses in the pulsation chamber to expel liquid from the drain chamber and to force filtered liquid back through the filtering element.
Claim 2
Independent Claim
118 words
A device for preparing thick pulp, comprising: a tank for suspension supplied thereinto; a filtering element submerged for filtering the suspension therein in said tank; a pulsation chamber communicating with said filtering element for receiving liquid filtered through said filtering element; a pipe connected to said pulsation chamber for draining from said pulsation chamber filtered liquid; an expanded drain chamber arranged at the end of said pipe remote from the pulsation chamber, said drain chamber being disposed above the portion of the pulsation chamber to be filled with filtered liquid; and means for applying periodic pressure pulses in the pulsation chamber to expel liquid from the drain chamber and to force filtered liquid back through the filtering element.
Claim 3
Dependent Claim
29 words
A device according to claim 1, wherein the pipe for draining filtered liquid is disposed vertically and has a lower bend portion connecting the pipe to the pulsation chamber.
Claim 4
Dependent Claim
24 words
A device according to claim 1, wherein said tank is vertical and has a lower portion beneath said filtering element with an outlet therein.
Claim 5
Dependent Claim
14 words
A device according to claim 3, wherein said lower portion includes a conical portion.
References Cited (Backward Citations)
US3389797A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-11 | 1974-07-13 | 1975-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-11 | 1978-07-13 | 1979-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-11 | 1982-07-13 | 1983-01-12 | $7700.00 | Window Closed / Lapsed |