US4053408A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of upflow liquid treatment
Assignee: Whittier Filtration Inc
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Filing: 1974-05-02
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Granted: 1977-10-11
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Expires: 1994-05-02
Abstract
Abstract An upflow liquid treatment method is provided with a vibrator which is used to facilitate the settling of granular solids down through a grate used to hold the solids in a static condition during the treatment cycle when liquid to be treated is passed upwardly through the bed.
Inventors
- 👤 Theodore H. O'Cheskey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:39
CPC Classifications
B; B01; B01D; B01D24/00; B01D24/007; B01D24/008; B01D24/02; B01D24/10; B01D24/16; B01D24/165; B01D24/46; B01D24/4668; B01D24/4673; B01D24/4684
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
160 words
The method of removing material from a liquid comprising the steps of flowing liquid up through a bed of granular solids which remove the material from the liquid, holding the bed of granular solids static with a grate in contact with the solids until the solids are loaded with material removed from the liquid, flowing liquid up through the bed at rate sufficient to cause the bed to fluidize and expand above the grate, whereby at least a portion of the material loaded in the bed while it was static is removed, decreasing the flow of liquid up through the expanded bed to a rate which permits granular solids to settle, vibrating the grate and the solids as they settle to facilitate passage of solids down through the grate and increase the packing density of the solids in the bed below the grate, and thereafter flowing additional liquid up through the static bed to remove material from the additional liquid.
Claim 2
Independent Claim
160 words
The method of removing material from a liquid comprising the steps of flowing liquid up through a bed of granular solids which remove the material from the liquid, holding the bed of granular solids static with a grate in contact with the solids until the solids are loaded with material removed from the liquid, flowing liquid up through the bed at rate sufficient to cause the bed to fluidize and expand above the grate, whereby at least a portion of the material loaded in the bed while it was static is removed, decreasing the flow of liquid up through the expanded bed to a rate which permits granular solids to settle, vibrating the grate and the solids as they settle to facilitate passage of solids down through the grate and increase the packing density of the solids in the bed below the grate, and thereafter flowing additional liquid up through the static bed to remove material from the additional liquid.
Claim 3
Dependent Claim
39 words
The method according to claim 1 which includes the step of vibrating the grate and bed of solids with a mechanical vibrator while flowing liquid up through the bed at a rate sufficient to cause the bed to fluidize.
Claim 4
Dependent Claim
54 words
The method according to claim 2 which includes using an air-driven vibrator to impart motion to grate and the solids when flowing liquid up through the bed at a rate sufficient to cause the bed to fluidize, and discharging air from the vibrator into the bed to assist in the fluidization of the bed.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-10-10 | 1981-04-11 | 1981-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-10-10 | 1985-04-11 | 1985-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-10-10 | 1989-04-11 | 1989-10-11 | $7700.00 | Window Closed / Lapsed |