Patent US2660340A successfully refreshed from Google Patents.
Patent US3864266A successfully refreshed from Google Patents.
US3864266A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filter system
Assignee: Individual
•
Filing: 1973-05-11
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Granted: 1975-02-04
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Expires: 1993-05-11
Abstract
Abstract A filter system including a filter strip and hollow upper and lower shells which form an enclosure surrounding a section of the filter strip. A liquid storage tank is connected to the upper shell to supply liquid. An outlet conduit connects the lower shell to an enclosed prime tank. An upright weir divides the prime tank into two sections. The outlet conduit discharges into one of the sections. A prime tank discharge line connects the other section to a pump which draws liquid from the prime tank. A jet ejector is connected to an upper portion of the prime tank. Liquid is discharged by the pump through the jet ejector to remove any entrained air that may accumulate in the upper portion of the prime tank.
Inventors
- 👤 Gerald P Dietrick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:34
CPC Classifications
B; B01; B01D; B01D29/00; B01D29/09
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
179 words
In combination with a pair of filters each including a filter strip and hollow upper and lower shells for forminG an enclosure surrounding a section of the filter strip, a liquid storage tank, inlet conduit means connecting the tank alternately to the upper shells to supply liquid to the upper shells, an outlet conduit connected to each lower shell, a pair of enclosed prime tanks, there being an upright weir in each prime tank dividing the prime tank into two sections, each outlet conduit discharging into one of the sections of one of the prime tanks, a prime tank discharge line, means for alternately connecting the prime tank discharge line to the other section of each prime tank below an upper edge of the weir, a pump connected to the prime tank discharge line to draw liquid from the prime tanks, a jet ejector connected to an upper portion of each prime tank, and means for directing liquid from the pump through the ejectors to power the ejectors to draw fluid from the upper portions of the prime tanks.
Claim 2
Dependent Claim
179 words
In combination with a pair of filters each including a filter strip and hollow upper and lower shells for forminG an enclosure surrounding a section of the filter strip, a liquid storage tank, inlet conduit means connecting the tank alternately to the upper shells to supply liquid to the upper shells, an outlet conduit connected to each lower shell, a pair of enclosed prime tanks, there being an upright weir in each prime tank dividing the prime tank into two sections, each outlet conduit discharging into one of the sections of one of the prime tanks, a prime tank discharge line, means for alternately connecting the prime tank discharge line to the other section of each prime tank below an upper edge of the weir, a pump connected to the prime tank discharge line to draw liquid from the prime tanks, a jet ejector connected to an upper portion of each prime tank, and means for directing liquid from the pump through the ejectors to power the ejectors to draw fluid from the upper portions of the prime tanks.
Claim 3
Dependent Claim
23 words
A combination as in claim 1 wherein each outlet conduit discharges into the associated prime tank below the upper edge of the weir.
Claim 4
Dependent Claim
16 words
A combination as in claim 1 wherein the jet ejector discharges into the liquid storage tank.
Claim 5
Dependent Claim
31 words
A combination as in claim 1 wherein there is means for directing air under pressure into the upper shell of each filter to cause discharge of liquid from the upper shell.
Claim 6
Dependent Claim
33 words
A combination as in claim 4 wherein there is means for directing liquid from the upper shell of each filter to the liquid storage tank when air is directed into the upper shell.
References Cited (Backward Citations)
US3172846A
Cited
US3335862A
Cited
US3489679A
Cited
US3478879A
Cited
US3618772A
Cited
US3672507A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-02-03 | 1978-08-05 | 1979-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-03 | 1982-08-05 | 1983-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-03 | 1986-08-05 | 1987-02-04 | $7700.00 | Window Closed / Lapsed |