US3633747A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filter press method and apparatus
Assignee: T Shriver and Co Inc
•
Filing: 1970-04-23
•
Granted: 1972-01-11
•
Expires: 1990-04-23
Abstract
Abstract A filter press with a plurality of filter plates mounted in side-by-side relationship and method and apparatus for cleaning the cake from the plates. The cake is formed upon the opposed side faces of the plates, and each of the side faces is covered by fabric. The fabric is flexed away from the plate by pressurized air which is introduced between the plate and the fabric to remove the cakes. Each plate has an operating unit formed by an air valve for controlling airflow into the plate, a rotatably mounted valve-actuator arm and a pair of abutment members adjacent the opposed top edges of the plate. When removing the cakes the plates are moved sequentially, away from the stack and laterally in the press. During the initial movement of each plate one of the abutment members on an adjacent plate engages and swings the actuator arm of the moving plate so as to open its valve, and the cakes are removed. The cleaned plate is then moved on, and an abutment member on the opposed adjacent plate engages the actuator arm for closing the valve.
Inventors
- 👤 William L Fismer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:54
CPC Classifications
B; B01; B01D; B01D25/00; B01D25/12; B01D25/172; B01D25/32; B01D25/34
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
185 words
A sequentially operated valve control system for use in carrying on a filter plate cleaning process wherein each plate has a pair of flexible fabric covers positioned respectively upon its sidewalls and is moved from a first position adjacent other plates in the filter plate stack to a second position in which it is separated from the other plates and the plate is cleaned and thence to a third position, comprising a plurality of filter plates, an air valve mounted upon each of said plates adapted to control the flow of pressurized air to its plate between each of the fabric covers and the adjacent sidewalls, rotatable actuator means on each of said plates for sequentially operating said valves, said apparatus including means for rotating said actuator means to open the valve for each plate when that plate is moved from said first position to said second position, said appAratus also including means to rotate said actuator means to close the valve of each plate while in said second position prior to movement of the next adjacent plate in the stock from said first position.
Claim 2
Independent Claim
183 words
An apparatus for controlling airflow to the interior of filter plates having flexible fabric sidewalls defining first and second sides, during the lateral movement of the plates in a filter cleaning process, comprising, valve means mounted on each plate for controlling the introduction of air into its associated plate, valve control apparatus on each of said plates including, a rotatably mounted actuator arm, means operatively connected to said valve and said arm for opening and closing the valve in response to arm rotation, abutment means for effecting rotation of the actuator arm on the filter plate adjacent a plate''s first side and stop means for effecting counter rotation of the actuator arm on the filter plate adjacent a plate''s second side whereby as a plate is moved laterally in the cleaning process its actuator arm is initially rotated by the abutment means on the filter plate adjacent its second side to open the valve and at the end of its movement its actuator arm is counter rotated by the stop means on the filter plate adjacent its first side to close the valve.
Claim 3
Dependent Claim
92 words
The apparatus as defined in claim 3 wherein said actuator arm forms a substantially S-shaped member rotatably mounted at its center on its associated filter plate and said abutment means comprises a spring loaded pawl extending beyond the first side of the plate on which it is mounted whereby, as each of said plates comes to rest at the end of said lateral movement said pawl is contacted by the first leg of the actuator mounted on the plate adjacent its first side and depressed to permit the leg to pass thereover.
Claim 4
Dependent Claim
71 words
The control system of claim 4 wherein said valve means comprises a ball valve having rotatable control arm and said actuator arm includes a connecting rod pivotably connected at one end to said arm eccentrically of its center of rotation and pivotably connected at its other end to said valve control arm whereby rotation of the actuator arm effects rotation of the valve control arm to open and close the valve.
Claim 5
Dependent Claim
192 words
An automatic valve control system for use on filter plates, having flexible fabric filters on opposed sides thereof, during a cleaning process wherein a plurality of such plates are positioned adjacent each other in a starting position and individual plates are moved laterally from the starting position to a final position while air is introduced between the fabric filters to flex the filters and remove filtrate cakes therefrom, comprising, an air valve on each of said filter plates, an actuator means rotatably mounted on each of said filter plates for opening the valve on initiation of lateral movement, means on one side of each of said filter plates for engaging the actuator means of the filter plate adjacent said one side whereby as said adjacent plate is moved laterally said actuator means is rotated to open said valve and admit air between the fabric filters, and stop means on the other side of each of said filter plates for contacting the actuator means of the filter plate adjacent said other side at the end of its lateral movement whereby said actuator means is rotated in an opposite direction to close the valve.
Claim 6
Dependent Claim
233 words
An automatic valve control system for use on a plurality of adjacent filter plates having flexible fabric filters, in a cleaning process wherein each plate is moved laterally and charged with air through a control valve thereon during movement to flex the fabric filters and remove filtrate cakes therefrom, comprising, a generally S-shaped actuator member rotatably mounted at its center on each of said plates and defining an upper and lower arm, a pivoted pawl member mounted on each plate in a location wherein it is adapted to be engaged by the upper arm of the actuator on the filter plate immediately to its right, a stop means mounted on each oF said plates in a position wherein it is adapted to be engaged by the lower arm of the actuator on the filter plate immediately to its left and means operatively connected between said actuator and said valve for operating said valve in response to pivotal movement of the actuator arm, wherein the initial lateral movement of a plate during the cleaning process causes the upper arm of its associated actuator means to contact the pawl on the immediately adjacent plate to its left, to pivot the actuator and open the valve and continued movement of the plate causes the lower arm of its actuator to contact the stop means on the immediately adjacent plate to its right, to close the valve.
Claim 7
Independent Claim
72 words
A method of cleaning filter plates having flexible fabric filters on opposed sides thereof, comprising, the steps of moving said plates sequentially from a first to a second position in a filter press, introducing a flow of compressed air into a plate to be cleaned between its fabric sides, on the initiation of movement thereof, and shutting off said flow of compressed air when said plate being cleaned reaches said second position.
Claim 8
Dependent Claim
27 words
The method as described in claim 8 including the step of maintaining said flow of air during movement of said plates from said first to second positions.
Claim 9
Independent Claim
115 words
A method of cleaning filter plates having flexible fabric filters on opposed sides thereof, comprising, the steps of, moving said plates sequentially from a first to a second position in a filter press, automatically and sequentially operating a valve member on each of said plates for introducing a flow of compressed air from a source thereof, into said plates between said fabric filters upon initiation of movement of an individual plate away from said first position, maintaining said valve in an open position during movement of said individual plate towards said second position, and automatically operating said valve to shut off said flow of compressed air as said individual plate moves into said second position.
References Cited (Backward Citations)
US3390772A
Cited
US3347383A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-01-10 | 1975-07-12 | 1976-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-10 | 1979-07-12 | 1980-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-10 | 1983-07-12 | 1984-01-11 | $7700.00 | Window Closed / Lapsed |