Patent US4900012A successfully refreshed from Google Patents.
Patent US3724658A successfully refreshed from Google Patents.
US3724658A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Particle separation in a gaseous fluid
Assignee: United Kingdom Atomic Energy Authority
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Filing: 1970-03-20
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Granted: 1973-04-03
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Expires: 1990-03-20
Abstract
Abstract Apparatus for separating particulate matter from a gas, particularly dust from air, selectively according to particle size comprising an inlet passage, a duct in-line with the inlet passage and a re-entrant branch duct into which a predetermined fraction of the gas is diverted, the change of direction of flow of said fraction being such that only smaller particles remain entrained therein and larger particles due to inertial and centrifugal forces are not diverted and are entrained in the undiverted fraction of the gas stream together with the particles entrained in said undiverted fraction. The apparatus may be adapted to provide a lung model simulator.
Inventors
- 👤 J Stephenson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:41
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/10; B01D50/00
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
176 words
Apparatus for size selective separation of particulate matter in a gas suspension comprising a casing, a separating chamber open at each end disposed within the casing so as to define an annular duct therewith, said casing having a gas inlet and a gas outlet, said gas inlet, said gas outlet and said annular duct all being in line with each other, a re-entrant branch duct means for diverting a fraction of the gas suspension including smaller particles entering the annular duct into one open end of the separating chamber by causing said diverted fraction to turn through more than a right angle, the undiverted fraction of said suspension including larger particles passing through said annular duct, said annular duct having an outlet substantially co-planar with the other open end of said separating chamber, and filter means disposed adjacent at least one of said duct outlet or other open end and intermediate said casing inlet and outlet for collecting particulate matter contained in gas flowing through at least one of said annular duct and said separating chamber.
Claim 2
Dependent Claim
176 words
Apparatus for size selective separation of particulate matter in a gas suspension comprising a casing, a separating chamber open at each end disposed within the casing so as to define an annular duct therewith, said casing having a gas inlet and a gas outlet, said gas inlet, said gas outlet and said annular duct all being in line with each other, a re-entrant branch duct means for diverting a fraction of the gas suspension including smaller particles entering the annular duct into one open end of the separating chamber by causing said diverted fraction to turn through more than a right angle, the undiverted fraction of said suspension including larger particles passing through said annular duct, said annular duct having an outlet substantially co-planar with the other open end of said separating chamber, and filter means disposed adjacent at least one of said duct outlet or other open end and intermediate said casing inlet and outlet for collecting particulate matter contained in gas flowing through at least one of said annular duct and said separating chamber.
Claim 3
Dependent Claim
25 words
Apparatus as claimed in claim 1 wherein said filter means collects particulate matter contained in gas flowing through said annular duct and said separating chamber.
Claim 4
Dependent Claim
22 words
Apparatus as claimed in claim 1 wherein said branch duct comprises an annular slot interconnecting said annular duct and said separating chamber.
Claim 5
Dependent Claim
27 words
Apparatus as claimed in claim 1 wherein said filter means comprises a single sheet of filter material extending across said annular duct and said separating chamber outlet.
References Cited (Backward Citations)
CA447061A
Cited
US2540695A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-04-02 | 1976-10-02 | 1977-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-02 | 1980-10-02 | 1981-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-02 | 1984-10-02 | 1985-04-03 | $7700.00 | Window Closed / Lapsed |