US3682307A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water filter
Assignee: Individual
•
Filing: 1970-08-21
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Granted: 1972-08-08
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Expires: 1990-08-21
Abstract
Abstract A water filter system particularly for iron removal having an aerator, a sedimentation chamber fed by the aerator, a filtration chamber connected with the sedimentation chamber, a gravity drain in the lower portion of the filtration chamber, and a storage chamber connected with the gravity drain. Connections are provided for back washing the filtration chamber without removal of its filtering material. Water for treatment is fed to the aerator wherein it is oxidized and drains to the sedimentation chamber from which it overflows into the filtration chamber, the water passing through the filtering material and exiting through a drain manifold into the storage chamber.
Inventors
- 👤 William J Cook
- 👤 Robert L Mccain
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:44
CPC Classifications
B; B01; B01D; B01D21/00; B01D21/30; B01D21/34; B01D21/0006; B01D21/0012; B01D21/02; B01D21/08; B01D21/307; C; C02; C02F; C02F9/00; C02F1/00; C02F1/001; C02F1/004; C02F1/52; C02F1/5236; C02F1/5245; C02F1/72; C02F1/74
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
281 words
A water filter including a tank having a chamber for coagulation and sedimentation of solids; a second chamber for filtering the water and a third chamber for storing the filtered water, an aerator above the first chamber and having louver and baffle means for oxidizing water flowing by gravity through the aerator into said first chamber, conduit means communicating with said aerator for supplying water thereto, a float valve disposed in said first chamber for controlling the flow of water through the conduit means to said aerator responsive to the water level in said first chamber, baffle means in said first chamber subdividing said chamber into intercommunicating compartments to increase the residence time of the water, means establishing communication between the upper portions of said first and second chambers, a water distribution trough extending across said second chamber for receiving filtered water from said first chamber, a filter bed in said second chamber below the distribution trough, a drain manifold comprising perforated means disposed in the filter bed near the bottom of said second chamber for gravity drainage of filtered water from said chamber, valve and coupling means connected with said gravity drain manifold and communicating with said third chamber to control drainage of water from said filter bed through said gravity drain manifold into said third chamber. valve and conduit means connected with said drain manifold for backflowing water through said filter bed to backwash the same, a drain coupling communicating with said second chamber for use after backflowing water through said filter bed to permit drainage of the backwash water from said second chamber, and drain couplings communicating with said first and third chambers for draining both said chambers.
Claim 2
Dependent Claim
281 words
A water filter including a tank having a chamber for coagulation and sedimentation of solids; a second chamber for filtering the water and a third chamber for storing the filtered water, an aerator above the first chamber and having louver and baffle means for oxidizing water flowing by gravity through the aerator into said first chamber, conduit means communicating with said aerator for supplying water thereto, a float valve disposed in said first chamber for controlling the flow of water through the conduit means to said aerator responsive to the water level in said first chamber, baffle means in said first chamber subdividing said chamber into intercommunicating compartments to increase the residence time of the water, means establishing communication between the upper portions of said first and second chambers, a water distribution trough extending across said second chamber for receiving filtered water from said first chamber, a filter bed in said second chamber below the distribution trough, a drain manifold comprising perforated means disposed in the filter bed near the bottom of said second chamber for gravity drainage of filtered water from said chamber, valve and coupling means connected with said gravity drain manifold and communicating with said third chamber to control drainage of water from said filter bed through said gravity drain manifold into said third chamber. valve and conduit means connected with said drain manifold for backflowing water through said filter bed to backwash the same, a drain coupling communicating with said second chamber for use after backflowing water through said filter bed to permit drainage of the backwash water from said second chamber, and drain couplings communicating with said first and third chambers for draining both said chambers.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-08 | 1976-02-07 | 1976-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-08 | 1980-02-07 | 1980-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-08 | 1984-02-07 | 1984-08-08 | $7700.00 | Window Closed / Lapsed |