US3757954A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Two-way filter
Assignee: Individual
•
Filing: 1971-12-15
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Granted: 1973-09-11
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Expires: 1991-12-15
Abstract
Abstract Apparatus in the form of a vertical vessel, having two spaced and supported filter beds located at either sides of a centrally located influent member, so that water to be treated is admitted to the apparatus through said influent member and a portion of the flow is filtered by passage through the lower filter bed and the second portion is filtered by its rise through the upper filter bed, the filtered fluid, for example water, being discharged to points of collection by separate effluent conduits, controlled by control and measuring devices. Valves adapted to close and open the influent member and the effluent conduits are provided, and a valved back-wash conduit is provided at the lower area of the vessel, together with an air-pressure inlet member. The top of each filter bed is provided with a valved outlet member leading to a conduit primarily for receiving dirty fluid by back wash and for discharging it from the vessel, the influent and the first named filtered fluid effluent valves being closed and the last named outlet member valves being opened.
Inventors
- 👤 A Toth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:00
CPC Classifications
B; B01; B01D; B01D24/00; B01D24/002; B01D24/004; B01D24/02; B01D24/10; B01D24/18; B01D24/183; B01D24/46; B01D24/4605; B01D24/4621; B01D24/4631
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
217 words
In a two-way filter for fluids, a vertical vessel, upper and lower apertured and mutually spaced supports therein and providing upper and lower areas for spaced filter beds, influent flow means adapted to discharge fluid to be clarified and intermediate said apertured supports, whereby a portion of the fluid to be treated and leaving said influent flow means, may be passed through the lower filter bed area and a second portion caused to rise through the upper filter Bed area, and means for discharging clarified fluid, as an effluent, from said filter bed areas said two-way filter further comprising an apertured influent distributor within the vessel and between the filter beds, an apertured effluent receiving member within the vessel and above the upper filter bed, an effluent discharge conduit below the lower filter bed, a back-wash conduit joining the apertured influent distributor and the apertured effluent discharge member, valve means adapted to open and shut the backwash conduit and when open to permit direct flow of spent backwash fluid from the apertured influent distributor and the apertured effluent receiving member into the backwash conduit, a flow conduit from the effluent receiving member and a valve controlling said conduit, valve means controlling the influent distributor, and valve means controlling the effluent discharge member below the lower filter bed.
Claim 2
Dependent Claim
217 words
In a two-way filter for fluids, a vertical vessel, upper and lower apertured and mutually spaced supports therein and providing upper and lower areas for spaced filter beds, influent flow means adapted to discharge fluid to be clarified and intermediate said apertured supports, whereby a portion of the fluid to be treated and leaving said influent flow means, may be passed through the lower filter bed area and a second portion caused to rise through the upper filter Bed area, and means for discharging clarified fluid, as an effluent, from said filter bed areas said two-way filter further comprising an apertured influent distributor within the vessel and between the filter beds, an apertured effluent receiving member within the vessel and above the upper filter bed, an effluent discharge conduit below the lower filter bed, a back-wash conduit joining the apertured influent distributor and the apertured effluent discharge member, valve means adapted to open and shut the backwash conduit and when open to permit direct flow of spent backwash fluid from the apertured influent distributor and the apertured effluent receiving member into the backwash conduit, a flow conduit from the effluent receiving member and a valve controlling said conduit, valve means controlling the influent distributor, and valve means controlling the effluent discharge member below the lower filter bed.
Claim 3
Dependent Claim
112 words
A two-way filter for fluids, constructed in accordance with claim 1, in which a perforated branched tubular member horizontally disposed intermediate the two filter bed areas constitutes the influent flow means, a second tubular member which is branched and perforated constitutes constitutes the discharge means for clarified effluent, means for admitting backwash fluid within the base of the vessel under the lower filter bed area, and backwash elements comprising a conduit extending vertically of the vessel, the branched and apertured tubular influent distributor and the branched and apertured tubular effluent discharge member extending horizontally of the vessel and directly flow-joined to said backwash conduit for simultaneous discharge of spent backwash fluid thereto.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-09-10 | 1977-03-12 | 1977-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-10 | 1981-03-12 | 1981-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-10 | 1985-03-12 | 1985-09-11 | $7700.00 | Window Closed / Lapsed |