Patent US3698557A successfully refreshed from Google Patents.
US3698557A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Clarifying filter press
Assignee: Ishigaki Mechanical Industry Co Ltd
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Filing: 1971-06-14
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Granted: 1972-10-17
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Expires: 1991-06-14
Abstract
Abstract A clarifying filter press wherein a plurality of filter frames and filter plates are arranged alternately, said filter frames and filter plates are connected with connecting means in such a manner that the filter frames and filter plates can be separated to give definite intervals therebetween, there are provided to each filter plate a set of endless filter mediums comprising two or more mediums which are trained over rollers so that said mediums cover both supporting beds of each filter plate with integrating to one another and are separated from one another under each filter plate, the filter mediums having been used for filtration are travelled after the filter frames and filter plates are separated, and the filter mediums are washed by washing devices provided on the way of separately travelling of the mediums. This clarifying filter press facilitates a largescaled filtering treatment of liquid having extremely low content of slurry to a high clarification degree owing to filtration with two or more filter mediums which are integrated to one another.
Inventors
- 👤 Eiichi Ishigaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:50
CPC Classifications
B; B01; B01D; B01D25/00; B01D25/12; B01D25/21; B01D25/215; B01D25/127; B01D25/28; B01D25/281; B01D25/32; B01D25/322
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
207 words
A clarifying filter press wherein a plurality of filter frames and filter plates are arranged alternately between front and rear machine frames, said filter frames and filter plates are connected with connecting means in such a manner that the filter frames and filter plates can be separated to give definite intervals therebetween, required numbers of filter medium supporting rollers are rotatably provided above and below each filter plate, sprocket wheels are fixedly mounted on all or selected shafts of said rollers at both sides thereof, there are provided to each filter plate a set of endless filter mediums comprising at least two mediums which are trained over said rollers and to which are connected at both lengthwise edges pairs of endless guiding means which are engaged with said sprocket wheels, each set of said filter mediums which are integrated together between each adjacent filter frame and filter plate are trained under each filter plate over another supporting rollers so as to separate each of the mediums from one another under the plate, washing devices for cleaning each of thus separated filter medium are provided respectively, and driving means for travelling each set of said filter mediums are provided to the shafts of one of said supporting rollers.
Claim 2
Dependent Claim
207 words
A clarifying filter press wherein a plurality of filter frames and filter plates are arranged alternately between front and rear machine frames, said filter frames and filter plates are connected with connecting means in such a manner that the filter frames and filter plates can be separated to give definite intervals therebetween, required numbers of filter medium supporting rollers are rotatably provided above and below each filter plate, sprocket wheels are fixedly mounted on all or selected shafts of said rollers at both sides thereof, there are provided to each filter plate a set of endless filter mediums comprising at least two mediums which are trained over said rollers and to which are connected at both lengthwise edges pairs of endless guiding means which are engaged with said sprocket wheels, each set of said filter mediums which are integrated together between each adjacent filter frame and filter plate are trained under each filter plate over another supporting rollers so as to separate each of the mediums from one another under the plate, washing devices for cleaning each of thus separated filter medium are provided respectively, and driving means for travelling each set of said filter mediums are provided to the shafts of one of said supporting rollers.
Claim 3
Dependent Claim
23 words
The clarifying filter press as claimed in claim 1 wherein all of the filter mediums in each set are made equal in length.
Claim 4
Dependent Claim
53 words
The clarifying filter press as claimed in claim 1 wherein said filter mediums in each set thereof are different from one another in density and the filter mediums being finer in mesh are positioned at positions nearer to the supporting bed of each filter plate than the filter mediums being coarser in mesh.
Claim 5
Dependent Claim
45 words
The clarifying filter press as claimed in claim 1 wherein each of said endless guiding means is composed of an endless band of metal, synthetic resin, duck or the like having numerous perforations along lengthwise direction thereof which perforations are engaged with said sprocket wheels.
Claim 6
Dependent Claim
29 words
The clarifying filter press as claimed in claim 1 wherein each of said endless guiding means is composed of an endless chain which are engaged with said sprocket wheels.
Claim 7
Dependent Claim
75 words
The clarifying filter press as claimed in claim 1 wherein said driving means for travelling the filter mediums comprise a driving shaft which is bridged between the front and rear machine frames and is driven by a driving source, bevel gears which are slidably but not rotatably mounted on said driving shaft, and another bevel gears which are fixedly mounted on the shafts of said upper rollers and are engaged with former bevel gears respectively.
Claim 8
Dependent Claim
137 words
The clarifying filter press as claimed in claim 1 wherein said filter frames and filter plates are arranged alternately between a fixed head and a movable head, the filter frames, the filter plates and said movable head are slidably mounted on a pair of guiding rails in such a manner that said frames, plates and head can be slid along said rails, said connecting means comprise upper and lower links which have elongated apertures with equal intervals therebetween and are pivotally connected to said fixed head at one ends respectively, the filter frames are pivotally connected to said links with equal intervals therebetween, and the filter plates and the movable head are connected to said links with pins which are fixedly provided to said frames and movable head and are inserted into said apertures of the links.
Claim 9
Dependent Claim
116 words
The clarifying filter press as claimed in claim 1 wherein packings are added to the surface of each filter frame at the place where each set of said filter mediums are in contact with the frame and at the places near passages for liquid to be filtered and for filtrate so that each filter frame is somewhat increased in thickness at said places than at the other places of the frame and said endless guiding means and means for connecting said guiding means to the filter mEdiums are travelled through the clearances formed between the surface of each filter plate and the places of each filter frame where the thickness of the frame is not increased.
Claim 10
Dependent Claim
52 words
The clarifying filter press as claimed in claim 1 wherein at least one of the shafts of said supporting rollers is supported in such a manner that said shaft can be displaced whereby the tension given to at least one of the filter mediums by said roller may be regulated or controlled.
References Cited (Backward Citations)
US3647082A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-17 | 1976-04-17 | 1976-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-17 | 1980-04-17 | 1980-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-17 | 1984-04-17 | 1984-10-17 | $7700.00 | Window Closed / Lapsed |