Patent US4911833A successfully refreshed from Google Patents.
US4911833A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Closed hemapheresis system and method
Assignee: Individual
•
Filing: 1988-06-06
•
Granted: 1990-03-27
•
Expires: 2008-06-06
Abstract
Abstract A centrifugal separator system is provided for extracting lighter matter from a liquid suspension. The separator includes a housing having an axis, an inlet port, a lighter matter outlet port and a heavier matter outlet port spaced from the inlet port. A rotatable interior double shell rotor is disposed within the housing. The rotor includes outer and inner shells and defines a centrifugation gap therebetween. The rotor is spaced from the housing by a flow gap. The outer shell includes means providing communication between the centrifugation gap, the inlet port and the heavier outlet port. Means are provided in the double shell rotor for conducting lighter matter from the centrifugation gap to the lighter matter outlet port.
Inventors
- 👤 Donald W. Schoendorfer
- 👤 William F. McLaughlin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:55
CPC Classifications
B; B04; B04B; B04B5/00; B04B5/04; B04B5/0442; A; A61; A61M; A61M1/00; A61M1/14; A61M1/16; A61M1/26; A61M1/262; A61M1/34; A61M1/3496; A61M1/36; A61M1/3693; A61M1/3696; B01; B01D; B01D61/00; B01D61/02; B01D61/08; B01D63/00; B01D63/06; B01D63/062; B01D63/16; B01D69/00; B01D69/04; B01D69/043; B01D2315/00; B01D2315/02; B04B2005/0464; B04B2005/0471
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
179 words
A centrifugal separator system for extracting lighter matter from a liquid suspension comprising: a housing having and including an inlet port to receive the liquid suspension, a heavier matter outlet port axially spaced from the inlet port and a lighter outlet port; a rotatable interior double shell rotor disposed within said housing for rotation about the axis, said rotor including an outer shell and an inner shell and a centrifugation gap between said inner and outer shells, said rotor being spaced from said housing by a flow gap and including means in said outer shell for providing communication between the centrifugation gap and said inlet port and said heavier matter outlet port; means within said double shell rotor communicating with said centrifugation gap and said lighter matter outlet port for conducting the lighter matter from the centrifugation gap to said lighter matter outlet port; means within said housing, coupled to said rotor, for rotating said rotor within said housing; and wherein the flow of liquid suspension is relatively unrestricted in the centrifugation gap in comparison to the flow gap.
Claim 2
Dependent Claim
179 words
A centrifugal separator system for extracting lighter matter from a liquid suspension comprising: a housing having and including an inlet port to receive the liquid suspension, a heavier matter outlet port axially spaced from the inlet port and a lighter outlet port; a rotatable interior double shell rotor disposed within said housing for rotation about the axis, said rotor including an outer shell and an inner shell and a centrifugation gap between said inner and outer shells, said rotor being spaced from said housing by a flow gap and including means in said outer shell for providing communication between the centrifugation gap and said inlet port and said heavier matter outlet port; means within said double shell rotor communicating with said centrifugation gap and said lighter matter outlet port for conducting the lighter matter from the centrifugation gap to said lighter matter outlet port; means within said housing, coupled to said rotor, for rotating said rotor within said housing; and wherein the flow of liquid suspension is relatively unrestricted in the centrifugation gap in comparison to the flow gap.
Claim 3
Dependent Claim
30 words
A system in accordance with claim 1, wherein said rotating means coupled to said rotor means is adapted for rotating said rotor without mechanical connection thereto, from outside said housing.
Claim 4
Dependent Claim
15 words
A system in accordance with claim 1, wherein said housing is a biologically closed cell.
Claim 5
Dependent Claim
44 words
A system in accordance with claim 1, wherein the lighter matter can be expressed out of said lighter matter outlet port and the remainder of the liquid suspension can be expressed out of said heavier matter outlet port during rotation of said rotor means.
Claim 6
Dependent Claim
77 words
A system in accordance with claim 1, wherein said centrifugal separator is a continuous flow separator in which liquid suspension can be introduced into said housing through said inlet port, in which the lighter matter can be expressed out of said housing through said lighter matter outlet port, and in which the remainder of the liquid suspension can be expressed out of said housing through said heavier matter outlet port, all during rotation of said rotor means.
Claim 7
Dependent Claim
15 words
A system in accordance with claim 5, wherein said housing is a biologically closed cell.
Claim 8
Dependent Claim
27 words
A system according to claim 1 wherein said housing axis is a central axis, and wherein said double shell rotor is rotatable concentrically about said central axis.
Claim 9
Dependent Claim
180 words
A continuous flow centrifugal separator comprising: a fixed housing disposed about an axis and having an inlet port, an outlet port for heavier matter that is axially spaced from the inlet port and an outlet port for lighter matter; and a rotor disposed within the housing for rotation about the axis, the rotor having an outer shell and an inner wall spaced radially inward from the outer shell to define therebetween a gap which extends axially between the housing inlet port and the housing heavier matter outlet port, the outer shall having at least one shell inlet port therein to provide communication of fluid from the housing inlet port into the gap, at least one shell heavier material outlet axially spaced from the shell inlet port in a direction toward the housing heavier material outlet port to provide communication from the gap to the housing heavier material outlet port, the rotor including a communication path for lighter material that extends from the gap and radially inwardly from the shell heavier material outlet port to the shell lighter material output port.
Claim 10
Dependent Claim
180 words
A continuous flow centrifugal separator comprising: a fixed housing disposed about an axis and having an inlet port, an outlet port for heavier matter that is axially spaced from the inlet port and an outlet port for lighter matter; and a rotor disposed within the housing for rotation about the axis, the rotor having an outer shell and an inner wall spaced radially inward from the outer shell to define therebetween a gap which extends axially between the housing inlet port and the housing heavier matter outlet port, the outer shall having at least one shell inlet port therein to provide communication of fluid from the housing inlet port into the gap, at least one shell heavier material outlet axially spaced from the shell inlet port in a direction toward the housing heavier material outlet port to provide communication from the gap to the housing heavier material outlet port, the rotor including a communication path for lighter material that extends from the gap and radially inwardly from the shell heavier material outlet port to the shell lighter material output port.
Claim 11
Dependent Claim
26 words
The centrifugal separator according to claim 8 wherein said housing axis is a central axis, and wherein said rotor is rotatable concentrically about said central axis.
Claim 12
Dependent Claim
20 words
A centrifugal separator according to claim 9, wherein the housing lighter material outlet port is concentric with the central axis.
Claim 13
Dependent Claim
15 words
A centrifugal separator according to claim 8, wherein the housing provides a biologically closed container.
Claim 14
Dependent Claim
38 words
A centrifugal separator according to claim 8, wherein a gap is defined between the rotor and the housing and at least a portion of the gap between the rotor and housing is no greater than the centrifugation gap.
Claim 15
Dependent Claim
27 words
A centrifugal separator according to claim 8, wherein at least a portion of the gap between the rotor and the housing is smaller than the centrifugation gap.
Claim 16
Dependent Claim
47 words
A centrifugal separator according to claim 8, wherein the centrifugation gap provides a flow path between the at least one shell inlet port and the at least one shell outlet port which is preferential to flow therebetween through a gap defined between the housing and the rotor.
References Cited (Backward Citations)
US3022937A
Cited
US3655123A
Cited
US3519201A
Cited
US3955755A
Cited
US4636193A
Cited
US4734089A
Cited
US4262840A
Cited
US4350156A
Cited
US4341343A
Cited
US4530691A
Cited
US4776964A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-03-26 | 1993-09-25 | 1994-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-03-26 | 1997-09-25 | 1998-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-03-26 | 2001-09-25 | 2002-03-27 | $7700.00 | Window Closed / Lapsed |