Patent EP0068813A2 successfully refreshed from Google Patents.
Patent US3770190A successfully refreshed from Google Patents.
US3770190A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Centrifugal countercurrent separator having bands covered with fluorocarbon sheets
Assignee: Individual
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Filing: 1971-02-25
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Granted: 1973-11-06
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Expires: 1991-02-25
Abstract
Abstract A device which may be a centrifugal countercurrent exchange extractor and/or a centrifugal separator, has a cylindrical rotor within which are mounted concentric, radially spaced, cylindrical, apertured bands. The inwardly facing surface of each band is covered with an apertured fluorocarbon sheet such that the apertures in the sheets are respectively aligned with the apertures in the bands. Rivets pass through the aligned apertures and are deformed to hold the sheets securely against the bands. Orifices are provided either in rivets or through the bands and sheets for the countercurrent flow of liquids.
Inventors
- 👤 C Doyle
- 👤 W Doyle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:28
CPC Classifications
B; B04; B04B; B04B1/00; B01; B01D; B01D11/00; B01D11/04; B01D11/0476; B01D11/048
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
111 words
A centrifugal device comprising a shaft, a rotor carried by said shaft and having a cylindrical shell, a plurality of radially spaced cylindrical apertured bands mounted in said rotor, a plurality of cylindrical fluorocarbon sheets respectively against the inwardly facing surfaces of as least some of said bands, each of said sheets having apertures therethrough which are respectively aligned with the apertures on the adjacent one of said bands, and a plurality of rivets respectively passing through at least some aligned apertures on said bands and said sheets and deformed to secure firmly said sheets to said bands, and rivets each having an orifice for the countercurrent flow of liquids therethrough.
Claim 2
Dependent Claim
111 words
A centrifugal device comprising a shaft, a rotor carried by said shaft and having a cylindrical shell, a plurality of radially spaced cylindrical apertured bands mounted in said rotor, a plurality of cylindrical fluorocarbon sheets respectively against the inwardly facing surfaces of as least some of said bands, each of said sheets having apertures therethrough which are respectively aligned with the apertures on the adjacent one of said bands, and a plurality of rivets respectively passing through at least some aligned apertures on said bands and said sheets and deformed to secure firmly said sheets to said bands, and rivets each having an orifice for the countercurrent flow of liquids therethrough.
Claim 3
Dependent Claim
16 words
The centrifugal device of claim 1, wherein said rivets pass through all of said aligned apertures.
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) | 1976-11-05 | 1977-05-07 | 1977-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-05 | 1981-05-07 | 1981-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-05 | 1985-05-07 | 1985-11-06 | $7700.00 | Window Closed / Lapsed |