Patent US3823830A successfully refreshed from Google Patents.
US3823830A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Main valve for rotary filters
Assignee: Tsukishima Kikai Co Ltd
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Filing: 1973-01-24
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Granted: 1974-07-16
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Expires: 1993-01-24
Abstract
Abstract A main valve having an exhaust port for filtrate and another exhaust port for gases, each being provided with an exchangeable baffle plate covered with wear resisting material. Mounted between the main valve and the wear plate is a main plate having an annular groove, in which the first and the second bridge blocks are fitted.
Inventors
- 👤 Y Hayafune
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:19
CPC Classifications
B; B01; B01D; B01D33/00; B01D33/06; B01D33/073; B01D33/09; B01D33/80; B01D33/82; B01D2201/00; B01D2201/28; B01D2201/282
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
162 words
A rotary filtering apparatus comprising a number of filter sections provided inside a slurry tank through which the slurry is filtered, a group of filtrate discharge pipes each within a filter section, a stationary main valve being in contact with the ends of each of said discharge pipes, a filtrate exhaust port and a gas exhaust port separately mounted on said main valve, a main plate mounted on the drum side surface of said main valve, and having an annular groove apertured toward said filter drum, said annular groove defining openings at the bottom of said groove corresponding to said two exhaust ports, bridge blocks demountably provided inside said groove of said main plate and baffle plates mounted inside said two exhaust ports, said filtrate exhaust port being located where filtrate flows out after being filtered by the advancement of a filter section into said slurry tank, and said gas exhaust port being located where the first air and gas is withdrawn.
Claim 2
Dependent Claim
162 words
A rotary filtering apparatus comprising a number of filter sections provided inside a slurry tank through which the slurry is filtered, a group of filtrate discharge pipes each within a filter section, a stationary main valve being in contact with the ends of each of said discharge pipes, a filtrate exhaust port and a gas exhaust port separately mounted on said main valve, a main plate mounted on the drum side surface of said main valve, and having an annular groove apertured toward said filter drum, said annular groove defining openings at the bottom of said groove corresponding to said two exhaust ports, bridge blocks demountably provided inside said groove of said main plate and baffle plates mounted inside said two exhaust ports, said filtrate exhaust port being located where filtrate flows out after being filtered by the advancement of a filter section into said slurry tank, and said gas exhaust port being located where the first air and gas is withdrawn.
References Cited (Backward Citations)
US3433265A
Cited
US3630380A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-07-15 | 1978-01-14 | 1978-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-15 | 1982-01-14 | 1982-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-15 | 1986-01-14 | 1986-07-16 | $7700.00 | Window Closed / Lapsed |