US5078671A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Centrifugal fluid processing system and method
Assignee: Fenwal Inc
•
Filing: 1990-10-12
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Granted: 1992-01-07
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Expires: 2010-10-12
Abstract
Abstract A centrifugal processing system and method introduces fluid to be processed into a centrifugation chamber, while directing the fluid away from the region of the chamber where the largest centrifugal (or "G") forces exist. The fluid is also conveyed into the force field as a generally uniform stream having reduced turbulence or being essentially free of turbulence. The system and method thereby establish, upon the entry of a high velocity fluid stream into the centrifugal field, non-turbulent and uniform flow conditions conducive to effective separation. The system and method also direct the fluid in a way the maximizes the effective surface area of the centrifugation chamber for separation. Effective separation can thereby be achieved at high inlet flow rates.
Inventors
- 👤 T. Michael Dennehey
- 👤 Joseph C. West, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:31
CPC Classifications
B; B04; B04B; B04B5/00; B04B5/04; B04B5/0442; B04B2005/045
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
209 words
A centrifugal chamber for positioning within a rotating field and for centrifugally processing a fluid suspension into component parts, the chamber comprising: oppositely spaced first and second exterior walls defining a chamber having an interior processing region with an inlet, the first exterior wall, when positioned within the rotating field, being disposed closer to the rotational axis than the second exterior wall to define within the interior processing region a low-g area adjacent the first exterior wall and a high-g area adjacent the second exterior wall, inlet conduit means of a given cross sectional area for conducting the fluid suspension to be processed to the chamber, and wall means forming a fluid receiving area within the inlet of the interior processing region in communication with the inlet conduit means, the fluid receiving area including an interior wall that isolates the fluid receiving area from the interior processing region except for an exit passage that has a cross sectional area greater than the cross sectional area of the inlet conduit means and that extends transversely across the exterior wall for dispensing the fluid suspension conducted by the inlet conduit means only into the log-g area of the processing region in a generally uniform flow free or essentially free of turbulence.
Claim 2
Dependent Claim
209 words
A centrifugal chamber for positioning within a rotating field and for centrifugally processing a fluid suspension into component parts, the chamber comprising: oppositely spaced first and second exterior walls defining a chamber having an interior processing region with an inlet, the first exterior wall, when positioned within the rotating field, being disposed closer to the rotational axis than the second exterior wall to define within the interior processing region a low-g area adjacent the first exterior wall and a high-g area adjacent the second exterior wall, inlet conduit means of a given cross sectional area for conducting the fluid suspension to be processed to the chamber, and wall means forming a fluid receiving area within the inlet of the interior processing region in communication with the inlet conduit means, the fluid receiving area including an interior wall that isolates the fluid receiving area from the interior processing region except for an exit passage that has a cross sectional area greater than the cross sectional area of the inlet conduit means and that extends transversely across the exterior wall for dispensing the fluid suspension conducted by the inlet conduit means only into the log-g area of the processing region in a generally uniform flow free or essentially free of turbulence.
Claim 3
Dependent Claim
23 words
A centrifugal chamber according to claim 1 wherein the first and second exterior walls are interconnected together to form a tubular processing chamber.
Claim 4
Dependent Claim
232 words
A centrifugal processing system comprising a rotor rotatable about an axis, and a processing chamber carried by the rotor in an arcuate path about the rotational axis, the processing chamber having oppositely spaced first and second exterior walls that enclose an interior processing region with an inlet at one arcuate location and an outlet at another arcuately spaced location on the rotor, the first exterior wall, when positioned within the rotating field, being disposed closer to the rotational axis than the second exterior wall to define within the interior processing region a low-g area adjacent the first exterior wall and a high-g area adjacent the second exterior wall, inlet conduit means of a given cross sectional area for conducting the fluid suspension to be processed to the processing chamber, and wall means forming a fluid receiving area within the inlet of the processing region in communication with the inlet conduit means, the fluid receiving area including an interior wall that isolates the fluid receiving area from the interior processing region except for an exit passage that has a cross sectional area greater than the cross sectional area of the inlet conduit means and that extends transversely across the first exterior wall for dispensing the fluid suspension conducted by the inlet conduit means only into the low-g area of the processing chamber in a generally uniform flow free or essentially free of turbulence.
Claim 5
Dependent Claim
232 words
A centrifugal processing system comprising a rotor rotatable about an axis, and a processing chamber carried by the rotor in an arcuate path about the rotational axis, the processing chamber having oppositely spaced first and second exterior walls that enclose an interior processing region with an inlet at one arcuate location and an outlet at another arcuately spaced location on the rotor, the first exterior wall, when positioned within the rotating field, being disposed closer to the rotational axis than the second exterior wall to define within the interior processing region a low-g area adjacent the first exterior wall and a high-g area adjacent the second exterior wall, inlet conduit means of a given cross sectional area for conducting the fluid suspension to be processed to the processing chamber, and wall means forming a fluid receiving area within the inlet of the processing region in communication with the inlet conduit means, the fluid receiving area including an interior wall that isolates the fluid receiving area from the interior processing region except for an exit passage that has a cross sectional area greater than the cross sectional area of the inlet conduit means and that extends transversely across the first exterior wall for dispensing the fluid suspension conducted by the inlet conduit means only into the low-g area of the processing chamber in a generally uniform flow free or essentially free of turbulence.
Claim 6
Dependent Claim
162 words
A centrifugal processing method for separating the higher density components of a fluid from the lower density components of the fluid comprising the steps of: providing a chamber having an interior processing region and an inlet, developing a centrifugal force field within the interior processing region to therein create a low-g area and a high-g area, conveying the fluid to be processed through an inlet path of a given cross sectional area into a receiving area within the inlet to the processing region, the receiving area having an interior wall that isolates the interior processing region from the flow conditions created by conveying the fluid into the receiving area, further conveying the fluid from the receiving area through an exit passage that has a cross sectional area greater than the cross sectional area of the inlet path and that dispenses the fluid in a generally uniform flow free or essentially free of turbulence only into the low-g area of the processing chamber.
Claim 7
Dependent Claim
162 words
A centrifugal processing method for separating the higher density components of a fluid from the lower density components of the fluid comprising the steps of: providing a chamber having an interior processing region and an inlet, developing a centrifugal force field within the interior processing region to therein create a low-g area and a high-g area, conveying the fluid to be processed through an inlet path of a given cross sectional area into a receiving area within the inlet to the processing region, the receiving area having an interior wall that isolates the interior processing region from the flow conditions created by conveying the fluid into the receiving area, further conveying the fluid from the receiving area through an exit passage that has a cross sectional area greater than the cross sectional area of the inlet path and that dispenses the fluid in a generally uniform flow free or essentially free of turbulence only into the low-g area of the processing chamber.
Claim 8
Dependent Claim
44 words
A centrifugal processing method according to claim 4, and further including the step of creating within the chamber a region confining the higher density components separated within the centrifugal field while allowing the remaining components of the fluid to flow out of the chamber.
References Cited (Backward Citations)
DE43693C
Cited
US1931508A
Cited
US1954676A
Cited
US2261394A
Cited
US2269716A
Cited
US2321144A
Cited
US2662687A
Cited
US2719668A
Cited
GB873494A
Cited
US3096282A
Cited
US3285507A
Cited
US3698626A
Cited
GB2002266A
Cited
US4113173A
Cited
US3957197A
Cited
US4007871A
Cited
US4010894A
Cited
US4425112A
Cited
US4069968A
Cited
US4091989A
Cited
US4430072A
Cited
US4120448A
Cited
US4094461A
Cited
US4419089A
Cited
US4230263A
Cited
US4387848A
Cited
US4146172A
Cited
US4185629A
Cited
US4386730A
Cited
US4278202A
Cited
US4187979A
Cited
US4261507A
Cited
US4303193A
Cited
US4344560A
Cited
US4322298A
Cited
US4421503A
Cited
US4772388A
Cited
US4531932A
Cited
US4445883A
Cited
US4493691A
Cited
US4447221A
Cited
US4617009A
Cited
US4439178A
Cited
US4710161A
Cited
US4647279A
Cited
US4708712A
Cited
US4668214A
Cited
US4743227A
Cited
US4778444A
Cited
US4790807A
Cited
WO1988005691A1
Cited
US4806252A
Cited
US4834890A
Cited
US4795314A
Cited
US4798579A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-01-06 | 1995-07-08 | 1996-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-01-06 | 1999-07-08 | 2000-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-01-06 | 2003-07-08 | 2004-01-07 | $7700.00 | Window Closed / Lapsed |