Patent US3868322A successfully refreshed from Google Patents.
US3868322A
Expired / Lapsed
US
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Apparatus for providing a supply of a filtered fluid
Assignee: Individual
•
Filing: 1973-07-23
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Granted: 1975-02-25
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Expires: 1993-07-23
Abstract
Abstract An apparatus for providing a supply of filtered fluid comprises a bistable fluidic oscillator which provides a fluid flow alternately in a pair of passages. Filter chambers in the respective passages have auxiliary outlets which are interconnected via a restrictor network, whereby fluid flows in alternate directions through filter elements in the chambers, and filtered fluid from the restrictor network passes to the outlet.
Inventors
- 👤 George Orloff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 07:50
CPC Classifications
B; B01; B01D; B01D35/00; B01D35/12; F; F02; F02C; F02C7/00; F02C7/22; Y; Y10; Y10T; Y10T137/00; Y10T137/206; Y10T137/2229; Y10T137/2234
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
231 words
An apparatus for providing a supply of filtered liquid, comprising a fluidic oscillator which includes a bistable wall attachment effect device having a pair of outlet passages and a pair of control ports, said control ports being interconnected so as to cause the bistable device to switch periodically between its two stable states at a rate determined by the fluid throughput, a pair of chambers in said outlet passages respectively, a common outlet to which said chambers are connected, each of said chambers having an auxiliary outlet, a pair of filter elements separating said auxiliary outlets from said chambers but permitting unimpeded flow of fluid from the outlet passages to the common outlet, a flow restrictor network interconnecting said auxiliary outlets, and a filtered fluid outlet communicating with said restrictor network, whereby, when the bistable device is in one stable state, a proportion of the fluid flowing into one chamber is tapped off from said auxiliary outlet and flows partially to the other chamber and partially to said filtered fluid outlet, and when the bistable device is in its other stable state a proportion of the fluid flowing through the other chamber is tapped off and flows partially to said one chamber and partially to said filtered fluid outlet, so that both filter elements are cleaned periodically and a continuous supply of filtered fluid is available at the filtered fluid outlet.
Claim 2
Independent Claim
231 words
An apparatus for providing a supply of filtered liquid, comprising a fluidic oscillator which includes a bistable wall attachment effect device having a pair of outlet passages and a pair of control ports, said control ports being interconnected so as to cause the bistable device to switch periodically between its two stable states at a rate determined by the fluid throughput, a pair of chambers in said outlet passages respectively, a common outlet to which said chambers are connected, each of said chambers having an auxiliary outlet, a pair of filter elements separating said auxiliary outlets from said chambers but permitting unimpeded flow of fluid from the outlet passages to the common outlet, a flow restrictor network interconnecting said auxiliary outlets, and a filtered fluid outlet communicating with said restrictor network, whereby, when the bistable device is in one stable state, a proportion of the fluid flowing into one chamber is tapped off from said auxiliary outlet and flows partially to the other chamber and partially to said filtered fluid outlet, and when the bistable device is in its other stable state a proportion of the fluid flowing through the other chamber is tapped off and flows partially to said one chamber and partially to said filtered fluid outlet, so that both filter elements are cleaned periodically and a continuous supply of filtered fluid is available at the filtered fluid outlet.
Claim 3
Dependent Claim
37 words
An apparatus as claimed in claim 1 in which said restrictor network comprises a pair of restrictors in series between said auxiliary outlets, and a third flow restrictor communicating with the junction of said pair of restrictors.
Claim 4
Dependent Claim
23 words
An apparatus as claimed in claim 2 which includes a plenum chamber in series between said restrictor network and said filtered fluid chamber.
Claim 5
Dependent Claim
23 words
An apparatus as claimed in claim 1 which includes a plenum chamber in series between said restrictor network and said filtered fluid chamber.
References Cited (Backward Citations)
US3016066A
Cited
US3630362A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-02-24 | 1978-08-26 | 1979-02-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-24 | 1982-08-26 | 1983-02-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-24 | 1986-08-26 | 1987-02-25 | $7700.00 | Window Closed / Lapsed |