Patent US3817449A successfully refreshed from Google Patents.
US3817449A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Centrifuge
Assignee: Linde Sverige AB
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Filing: 1972-02-15
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Granted: 1974-06-18
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Expires: 1992-02-15
Abstract
Abstract A centrifuge for treating a fluid, particularly a fluid containing heavier corpuscles in suspension, such as blood, includes a rotor rotatable about a spin axis and a motor for operable to rotate the rotor. A flexible tube extends through the rotor and has end portions extending from the ends of the rotor coaxially with the spin axis, the flexible tube, between the end portions thereof and within the rotor, being bent radially outwardly of the spin axis to form a bend with the radially outermost bend portion forming the treatment chamber. The tube is supported for rotation about its own axis independently of rotation of the rotor, and injection means are provided to supply fluid to be treated to the treatment chamber, with discharge means being connected to the tube to discharge treated fluid from the treated chamber into receptacles in a dish. Selectively operable brakes are engageable with the tube to cause the tube, during spinning of the rotor, to be decelerated to rotate about its own axis relative to the rotor.
Inventors
- 👤 J Westberg
- 👤 H Unger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:12
CPC Classifications
B; B04; B04B; B04B5/00; B04B5/04
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
199 words
In a centrifuge for treating a fluid, particularly a fluid containing heavier corpuscles in suspension, such as blood, including rotor means with a chamber for performing the treatment of a fluid therein and means for admitting fluid to be treated into the chamber during spinning of the rotor means, the improvement comprising, in combination, a rotor; means mounting said rotor for rotation about a spin axis; driving means operable to rotate said rotor; a flexible tube extending through said rotor and having end portions extending from the axially opposite ends of said rotor coaxially with said spin axis, and said flexible tube, between said end portions thereof and within said rotor, being bent radially outwardly of said spin axis to form a bend with a radially outermost bend portion forming the treatment chamber; means supporting said tube for rotation about its own axis independently of rotation of said rotor; means connected to said flexible tube for supplying fluid to be treated to said treatment chamber and for discharging treated fluid from said treatment chamber; and means selectively engageable with said tube to cause said tube, in the spinning rotor, to rotate about its own axis relative to said rotor.
Claim 2
Dependent Claim
199 words
In a centrifuge for treating a fluid, particularly a fluid containing heavier corpuscles in suspension, such as blood, including rotor means with a chamber for performing the treatment of a fluid therein and means for admitting fluid to be treated into the chamber during spinning of the rotor means, the improvement comprising, in combination, a rotor; means mounting said rotor for rotation about a spin axis; driving means operable to rotate said rotor; a flexible tube extending through said rotor and having end portions extending from the axially opposite ends of said rotor coaxially with said spin axis, and said flexible tube, between said end portions thereof and within said rotor, being bent radially outwardly of said spin axis to form a bend with a radially outermost bend portion forming the treatment chamber; means supporting said tube for rotation about its own axis independently of rotation of said rotor; means connected to said flexible tube for supplying fluid to be treated to said treatment chamber and for discharging treated fluid from said treatment chamber; and means selectively engageable with said tube to cause said tube, in the spinning rotor, to rotate about its own axis relative to said rotor.
Claim 3
Dependent Claim
16 words
A centrifuge according to claim 1 in which the tube is made of a plastics material.
Claim 4
Dependent Claim
33 words
A centrifuge, according to claim 1, in which said means selectively engageable with said tube comprises brakes engageable with both said end portions of said tube extending from the ends of said rotor.
Claim 5
Dependent Claim
14 words
A centrifuge, according to claim 1, in which the tube is made of polypropylene.
Claim 6
Dependent Claim
28 words
A centrifuge, according to claim 1, including a tubular guide fixed in said rotor and consisting of a plastics; said flexible tube extending concentrically through said tubular guide.
Claim 7
Dependent Claim
14 words
A centrifuge, according to claim 5, in which said tubular guide consists of polytetrafluoroethylene.
Claim 8
Dependent Claim
83 words
A centrifuge, according to claim 1, in which said spin axis of said rotor is substantially vertical; a terminal tube connected to the bottom end of said flexible tube; a receptacle for fluid adjacent said terminal tube, said terminal tube being adapted to be dipped into said receptacle; and pump means connected to the upper end of said flexible tube for drawing up fluid from said receptacle through said terminal tube intO said treating chamber and for expelling fluid from said treating chamber.
Claim 9
Dependent Claim
43 words
A centrifuge, according to claim 7, including plural said receptacles for fluid; said plural said receptacles as a unit and said terminal tube being movable relative to each other for dipping of said terminal tube into a selected one of said plural receptacles.
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) | 1977-06-17 | 1977-12-17 | 1978-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-17 | 1981-12-17 | 1982-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-17 | 1985-12-17 | 1986-06-18 | $7700.00 | Window Closed / Lapsed |