US4194684A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Centifugal apparatus using polyester elastomer tubing
Assignee: Baxter International Inc
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Filing: 1977-06-13
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Granted: 1980-03-25
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Expires: 1997-06-13
Abstract
Abstract Centrifugal processing apparatus in which a processing chamber is rotatably mounted with respect to a stationary base. An umbilical cable segment comprising polyester elastomer tubing is fixed at one end substantially along the axis of the processing chamber at one side thereof, with the other end of the cable segment being attached substantially on the axis in rotationally locked engagement to the processing chamber. In a preferred embodiment, the polyester elastomer is HYTREL® polyester elastomer.
Inventors
- 👤 Daniel R. Boggs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:07
CPC Classifications
B; B04; B04B; B04B5/00; B04B5/04; B04B5/0442; B04B2005/0492
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
161 words
Centrifugal processing apparatus, which comprises: a stationary base; a processing chamber rotatably mounted with respect to said base for rotation about a predetermined axis; a flexible umbilical cable segment comprising a polyester elastomer for estabilishing fluid communication with said processing chamber, one end of said cable segment being fixed with respect to said base substantially along said axis at one side of said processing chamber, the other end of said cable segment being attached substantially on said axis in rotationally locked engagement to said processing chamber; means for rotating said fluid processing chamber and said cable segment in the same direction with a speed ratio of 2:1, respectively; an outer enclosure positioned about said processing chamber and being symmetrically dimensioned about said axis; means rotatably coupling said outer enclosure to said processing chamber, permitting said outer enclosure to rotate at one-half the speed of said processing chamber; and said outer enclosure being positioned intermediate said processing chamber and said cable segment.
Claim 2
Dependent Claim
161 words
Centrifugal processing apparatus, which comprises: a stationary base; a processing chamber rotatably mounted with respect to said base for rotation about a predetermined axis; a flexible umbilical cable segment comprising a polyester elastomer for estabilishing fluid communication with said processing chamber, one end of said cable segment being fixed with respect to said base substantially along said axis at one side of said processing chamber, the other end of said cable segment being attached substantially on said axis in rotationally locked engagement to said processing chamber; means for rotating said fluid processing chamber and said cable segment in the same direction with a speed ratio of 2:1, respectively; an outer enclosure positioned about said processing chamber and being symmetrically dimensioned about said axis; means rotatably coupling said outer enclosure to said processing chamber, permitting said outer enclosure to rotate at one-half the speed of said processing chamber; and said outer enclosure being positioned intermediate said processing chamber and said cable segment.
Claim 3
Dependent Claim
28 words
Centrifugal processing apparatus as described in claim 2, said polyester elastomer comprising a polyester copolymer based on a poly(oxyalkylene), a dicarboxylic acid and a low molecular weight diol.
Claim 4
Dependent Claim
14 words
Centrifugal processing apparatus as described in claim 2, wherein said dicarboxylic acid is aromatic.
Claim 5
Dependent Claim
16 words
Centrifugal processing apparatus as described in claim 3, wherein said low molecular weight diol is 1,4-butanediol.
Claim 6
Dependent Claim
13 words
Centrifugal processing apparatus as described in claim 4, wherein said poly(oxyalkylene) is poly(oxytetramethylene).
Claim 7
Dependent Claim
18 words
Centrifugal processing apparatus as described in claim 1, wherein said umbilical cable segment comprises a polyester thermoplastic elastomer.
Claim 8
Dependent Claim
15 words
Centrifugal processing apparatus as described in claim 6, said polyester elastomer comprising HYTREL® polyester elastomer.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-03-25 | 1983-09-24 | 1984-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-03-25 | 1987-09-24 | 1988-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-03-25 | 1991-09-24 | 1992-03-25 | $7700.00 | Window Closed / Lapsed |