Patent US3894899A successfully refreshed from Google Patents.
US3894899A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for making a drum-type honeycombless vacuum filter
Assignee: Individual
•
Filing: 1973-07-26
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Granted: 1975-07-15
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Expires: 1993-07-26
Abstract
Abstract The drum-type honeycombless vacuum filter comprises a rotatable drum partly submerged in a pan holding the suspension to be filtered and having a distributor head disposed along its axis, one space of said distributor head being in communication with a vacuum chamber and another with a vacuum collector of filtrate. The drum is formed as a rigid inner plastic shell, with open-end vessels arranged in side-by-side relationship secured thereto. The channels defined in the vessels form a space for collection of filtrate. An outer shell is formed over said vessels by a binder-impregnated glass fabric wrapped over them. A drainage means in fluid flow communication with the channels of the vessels is secured to the outer shell. The channels of the vessels are communicated by a common annular channels opening through pipes into the distributor head.
Inventors
- 👤 Vladimir Grigorievic Konopatov
- 👤 Izrail Mikhailovich Sorotskin
- 👤 Ivan Ivanovich Rumyantsev
- 👤 Vadim Petrovich Abramov
- 👤 Alexandr Sergeevich Kupriyanov
- 👤 Orest Mikhailovich Mudrenov
- 👤 Ivan Andreevich Soloviev
- 👤 Vladimir Alexandrovich Shakhov
- 👤 Anatoly Konstantinovic Mironov
- 👤 Galina Mikhailovna Zhukovskaya
- 👤 Arkady Markovich Gleikh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:38
CPC Classifications
B; B01; B01D; B01D33/00; B01D33/06; B01D33/073; B01D33/09
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
206 words
A METHOD FOR MAKING A REINFORCED PLASTIC HONEYCOMBLESS VACUUM DRUM FILTER COMPRISING THE STEPS OF: MAKING A RIGID OPEN ENDED PLASTIC SHELL ROTATABLY MOUNTED ON AN AXIS AS AN INTERNAL SHELL TO SAID DRUM FILTER, CONSTRUCTING AND ARRANGING RIGID PLASTIC VESSELS COMMUNICATING WITH EACH OTHER AND SECURED ON SAID INTERNAL SHELL PARALLEL TO ITS GENERATING LINES IN A SIDE-BY-SIDE RELATIONSHIP, SAID VESSELS DEFINING A PLURALITY OF CHANNELS FORMING A SPACER FOR COLLECTING FILTRATE FROM THE SURFACE OF SAID DRUM FILTER, SAID VESSELS HAVING CYLINDRICAL EXTERNAL SURFACES, WRAPPING SAID CYLINDRICAL EXTERNAL SURFACES OF SAID PLASTIC SHELLS WITH BINDER-IMPREGNATED GLASS FABRIC FORMING THE OUTER CYLINDRICAL SHELL OF SAID DRUM FILTER FORMING OPENINGS IN SAID OUTER SHELL, MOUNTING A DRAINAGE MEANS ON SAID OUTER SHELL OF SAID DRUM FILTER COMMUNICATING THROUGH SAID OPENING WITH SAID SPACE FOR COLLECTING FILTRATE FROM SAID DRUM FILTER, CONNECTING THE FACES OF SAID INNER AND SAID OUTER SHELLS WITH A COMMON END FACE PLATE, ALLOWING CLEARANCE BETWEEN SAID END FACE PLATE AND THE END FACES OF SAID VESSELS FOR DEFINING AN ANNULAR CHANNEL ON AT LEAST ONE SIDE OF SAID DRUM, AND ARRANGING SAID ANNULAR CHANNEL TO COMMUNICATE WITH FLUID DISTRIBUTOR MEANS ARRANGED AROUND THE AXIS OF THE DRUM BY MEANS OF RADIAL PIPES.
Claim 2
Independent Claim
206 words
A METHOD FOR MAKING A REINFORCED PLASTIC HONEYCOMBLESS VACUUM DRUM FILTER COMPRISING THE STEPS OF: MAKING A RIGID OPEN ENDED PLASTIC SHELL ROTATABLY MOUNTED ON AN AXIS AS AN INTERNAL SHELL TO SAID DRUM FILTER, CONSTRUCTING AND ARRANGING RIGID PLASTIC VESSELS COMMUNICATING WITH EACH OTHER AND SECURED ON SAID INTERNAL SHELL PARALLEL TO ITS GENERATING LINES IN A SIDE-BY-SIDE RELATIONSHIP, SAID VESSELS DEFINING A PLURALITY OF CHANNELS FORMING A SPACER FOR COLLECTING FILTRATE FROM THE SURFACE OF SAID DRUM FILTER, SAID VESSELS HAVING CYLINDRICAL EXTERNAL SURFACES, WRAPPING SAID CYLINDRICAL EXTERNAL SURFACES OF SAID PLASTIC SHELLS WITH BINDER-IMPREGNATED GLASS FABRIC FORMING THE OUTER CYLINDRICAL SHELL OF SAID DRUM FILTER FORMING OPENINGS IN SAID OUTER SHELL, MOUNTING A DRAINAGE MEANS ON SAID OUTER SHELL OF SAID DRUM FILTER COMMUNICATING THROUGH SAID OPENING WITH SAID SPACE FOR COLLECTING FILTRATE FROM SAID DRUM FILTER, CONNECTING THE FACES OF SAID INNER AND SAID OUTER SHELLS WITH A COMMON END FACE PLATE, ALLOWING CLEARANCE BETWEEN SAID END FACE PLATE AND THE END FACES OF SAID VESSELS FOR DEFINING AN ANNULAR CHANNEL ON AT LEAST ONE SIDE OF SAID DRUM, AND ARRANGING SAID ANNULAR CHANNEL TO COMMUNICATE WITH FLUID DISTRIBUTOR MEANS ARRANGED AROUND THE AXIS OF THE DRUM BY MEANS OF RADIAL PIPES.
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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 |