US5316440A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Blood pump apparatus
Assignee: Terumo Corp
•
Filing: 1993-02-01
•
Granted: 1994-05-31
•
Expires: 2013-02-01
Abstract
Abstract Disclosed is a blood pump apparatus for blood components, comprising a housing forming a substantially cylindrical liquid chamber, an inlet port formed at an upper central portion of the housing and communicating with a source of blood component and the chamber, an outlet port formed in a peripheral portion of the housing and communicating with the chamber, a rotator arranged in the chamber and having an upper cover and a lower shroud, a lower surface of the upper cover being inclined such that an angle θ formed by the lower surface of the cover and a central axis of the inlet port is an obtuse angle, and a plurality of grooves being formed radially in the upper surface of the shroud, a projection formed at an upper central portion of the shroud and located immediately below the inlet port, bearing rotatably supporting the rotator with respect to the housing, motor for applying a rotational force to the rotator, and a plurality of liquid paths radially formed between the upper cover and the shroud to substantially uniformly distribute blood from a central portion of the rotator to a peripheral portion thereof. Each of the paths has a cross sectional area substantially constant over the entire length region or gradually diminishing in one direction.
Inventors
- 👤 Toshihiko Kijima
- 👤 Kunio Horiuchi
- 👤 Hiroyuki Oshiyama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:44
CPC Classifications
F; F04; F04D; F04D13/00; F04D13/02; F04D13/021; F04D13/024; A; A61; A61M; A61M60/00; A61M60/10; A61M60/104; A61M60/109; A61M60/113; A61M60/20; A61M60/205; A61M60/216; A61M60/226; A61M60/232; A61M60/30; A61M60/36; A61M60/38; A61M60/40; A61M60/403; A61M60/419; A61M60/422; A61M60/50; A61M60/508; A61M60/538; A61M60/546; A61M60/80; A61M60/802; A61M60/818; A61M60/825; A61M60/827; A61M2205/00; A61M2205/12; A61M2205/33; A61M2205/3331; A61M2205/3334; Y; Y10; Y10S; Y10S415/00; Y10S415/90
Claims Analysis
Total Claims: 32
Claim 1
Independent Claim
280 words
A centrifugal type blood pump apparatus for blood components, comprising: a housing forming a substantially cylindrical liquid chamber; an inlet port formed at an upper central portion of said housing and communicating with both a supply source of blood component and said chamber; an outlet port formed in a peripheral portion of said housing and communicating with said chamber, said outlet port comprising an opening in said housing; a rotator rotatably arranged in said chamber and having an upper cover and a lower shroud, a lower surface of the upper cover being inclined such that an angle θ formed by the lower surface and a central axis of the inlet port is an obtuse angle, and a plurality of grooves formed radially in an upper portion of said shroud; projection means formed at an upper central portion of the shroud and located immediately below said inlet port for directing input blood component toward said plurality of grooves; bearing means for rotatably supporting the rotator with respect to the housing; motor means for applying a rotational force to the rotator to rotate the rotator; and a plurality of distributing paths defined between said upper cover and said plurality of grooves of the shroud, and communicating with both the inlet port and the outlet port, said distributing paths each having at least a surface which is downwardly inclined from said inlet port toward said outlet port and said distributing paths being separated from each other and out of communication with each other at portions thereof between input and output ends thereof and, each of said distributing paths having a cross sectional area which gradually diminishes in one direction along the length thereof.
Claim 2
Dependent Claim
280 words
A centrifugal type blood pump apparatus for blood components, comprising: a housing forming a substantially cylindrical liquid chamber; an inlet port formed at an upper central portion of said housing and communicating with both a supply source of blood component and said chamber; an outlet port formed in a peripheral portion of said housing and communicating with said chamber, said outlet port comprising an opening in said housing; a rotator rotatably arranged in said chamber and having an upper cover and a lower shroud, a lower surface of the upper cover being inclined such that an angle θ formed by the lower surface and a central axis of the inlet port is an obtuse angle, and a plurality of grooves formed radially in an upper portion of said shroud; projection means formed at an upper central portion of the shroud and located immediately below said inlet port for directing input blood component toward said plurality of grooves; bearing means for rotatably supporting the rotator with respect to the housing; motor means for applying a rotational force to the rotator to rotate the rotator; and a plurality of distributing paths defined between said upper cover and said plurality of grooves of the shroud, and communicating with both the inlet port and the outlet port, said distributing paths each having at least a surface which is downwardly inclined from said inlet port toward said outlet port and said distributing paths being separated from each other and out of communication with each other at portions thereof between input and output ends thereof and, each of said distributing paths having a cross sectional area which gradually diminishes in one direction along the length thereof.
Claim 3
Dependent Claim
16 words
The blood pump apparatus according to claim 1, wherein each of said distributing paths is bent.
Claim 4
Dependent Claim
16 words
The blood pump apparatus according to claim 1, wherein each of said distributing paths is straight.
Claim 5
Dependent Claim
19 words
The blood pump apparatus according to claim 1, wherein said angle θ is over 90° and less than 105°.
Claim 6
Dependent Claim
66 words
The blood pump apparatus according to claim 1, wherein said upper portion of said shroud is inclined from a center thereof toward the periphery thereof so as to make an obtuse angle with said inlet port, such that each of said distributing paths is downwardly inclined, and an outlet of each of said distributing paths is positioned lower than an inlet of the respective distributing path.
Claim 7
Dependent Claim
46 words
The blood pump apparatus according to claim 1, wherein said opening of the outlet port satisfies the condition of L≧0.4 R, where L denotes a length of a chord of contact with said opening communicating with the chamber, and R represents the radius of the chamber.
Claim 8
Dependent Claim
22 words
The blood pump apparatus according to claim 1, wherein said downwardly inclined surfaces of said distributing paths comprises an upper surface thereof.
Claim 9
Dependent Claim
19 words
The blood pump apparatus according to claim 2, wherein said angle θ is over 90° and less than 105°.
Claim 10
Dependent Claim
19 words
The blood pump apparatus according to claim 3, wherein said angle θ is over 90° and less than 105°.
Claim 11
Dependent Claim
201 words
A centrifugal type blood pump apparatus for blood components, comprising: a housing forming a substantially cylindrical liquid chamber; an inlet port formed at an upper central portion of said housing and communicating with both a supply source of blood component and said chamber; an outlet port formed in a peripheral portion of said housing and communicating with said chamber, said outlet port defining an opening in said housing; a rotator arranged in said chamber and having an upper cover and a lower shroud; a projection formed at an upper central portion of the shroud and located immediately below said inlet port; bearing means for rotatably supporting the rotator with respect to the housing; motor means for applying a rotational force to the rotator; a plurality of grooves being formed radially in the upper surface of said shroud; and a plurality of distributing paths defined between said plurality of grooves and said cover and communicating with both the inlet port and the outlet port, wherein said opening of said outlet port satisfies the condition of L≧0.4 R, where L denotes a length of a chord of contact with said opening communicating with the chamber, and R represents the radius of the chamber.
Claim 12
Dependent Claim
201 words
A centrifugal type blood pump apparatus for blood components, comprising: a housing forming a substantially cylindrical liquid chamber; an inlet port formed at an upper central portion of said housing and communicating with both a supply source of blood component and said chamber; an outlet port formed in a peripheral portion of said housing and communicating with said chamber, said outlet port defining an opening in said housing; a rotator arranged in said chamber and having an upper cover and a lower shroud; a projection formed at an upper central portion of the shroud and located immediately below said inlet port; bearing means for rotatably supporting the rotator with respect to the housing; motor means for applying a rotational force to the rotator; a plurality of grooves being formed radially in the upper surface of said shroud; and a plurality of distributing paths defined between said plurality of grooves and said cover and communicating with both the inlet port and the outlet port, wherein said opening of said outlet port satisfies the condition of L≧0.4 R, where L denotes a length of a chord of contact with said opening communicating with the chamber, and R represents the radius of the chamber.
Claim 13
Dependent Claim
29 words
The blood pump apparatus according to claim 10, wherein each of said distributing paths has a cross sectional area which is substantially constant over the entire length region thereof.
Claim 14
Dependent Claim
29 words
The blood pump apparatus according to claim 10, wherein each of said distributing paths has a cross sectional area which gradually diminishes in one direction along the length thereof.
Claim 15
Dependent Claim
17 words
The blood pump apparatus according to claim 10, wherein each of said distributing paths is downwardly inclined.
Claim 16
Dependent Claim
35 words
The blood pump apparatus according to claim 10, wherein said distributing paths are separated from each other and are out of contact with each other along the lengths thereof between input and output ends thereof.
Claim 17
Dependent Claim
236 words
A centrifugal blood pump apparatus for blood components, comprising: a housing forming a substantially cylindrical liquid chamber; an inlet port formed at an upper central portion of said housing and communicating with both a supply source of blood component and said chamber; an outlet port formed in a peripheral portion of said housing and communicating with said chamber, said outlet port defining an opening in said housing; a rotator arranged in said chamber and having an upper cover and a lower shroud, a lower surface of the upper cover being inclined such that an angle θ formed by the lower surface and a central axis of the inlet port is an obtuse angle, and a plurality of grooves being formed radially in an upper portion of said shroud; a projection formed at an upper central portion of the shroud and located immediately below said inlet port; bearing means for rotatably supporting the rotator with respect to the housing; motor means for applying a rotational force to the rotator; and a plurality of distributing paths defined between said upper cover and said plurality of grooves of the shroud, and communicating with both the inlet port and the outlet port; wherein said opening of said outlet port satisfies the condition of L≧0.4 R, where L denotes a length of a chord of contact with said opening communicating with the chamber, and R represents the radius of the chamber.
Claim 18
Dependent Claim
236 words
A centrifugal blood pump apparatus for blood components, comprising: a housing forming a substantially cylindrical liquid chamber; an inlet port formed at an upper central portion of said housing and communicating with both a supply source of blood component and said chamber; an outlet port formed in a peripheral portion of said housing and communicating with said chamber, said outlet port defining an opening in said housing; a rotator arranged in said chamber and having an upper cover and a lower shroud, a lower surface of the upper cover being inclined such that an angle θ formed by the lower surface and a central axis of the inlet port is an obtuse angle, and a plurality of grooves being formed radially in an upper portion of said shroud; a projection formed at an upper central portion of the shroud and located immediately below said inlet port; bearing means for rotatably supporting the rotator with respect to the housing; motor means for applying a rotational force to the rotator; and a plurality of distributing paths defined between said upper cover and said plurality of grooves of the shroud, and communicating with both the inlet port and the outlet port; wherein said opening of said outlet port satisfies the condition of L≧0.4 R, where L denotes a length of a chord of contact with said opening communicating with the chamber, and R represents the radius of the chamber.
Claim 19
Dependent Claim
29 words
The blood pump apparatus according to claim 15, wherein each of said distributing paths has a cross sectional area which is substantially constant over the entire length region thereof.
Claim 20
Dependent Claim
29 words
The blood pump apparatus according to claim 15, wherein each of said distributing paths has a cross sectional area which gradually diminishes in one direction along the length thereof.
Claim 21
Dependent Claim
17 words
The blood pump apparatus according to claim 15, wherein each of said distributing paths is downwardly inclined.
Claim 22
Dependent Claim
35 words
The blood pump apparatus according to claim 15, wherein said distributing paths are separated from each other and are out of contact with each other along the lengths thereof between input and output ends thereof.
Claim 23
Dependent Claim
280 words
A centrifugal type blood pump apparatus for blood components, comprising: a housing forming a substantially cylindrical liquid chamber; an inlet port formed at an upper central portion of said housing and communicating with both a supply source of blood component and said chamber; an outlet port formed in a peripheral portion of said housing and communicating with said chamber, said outlet port comprising an opening in said housing; a rotator rotatably arranged in said chamber and having an upper cover and a lower shroud, a lower surface of the upper cover being inclined such that an angle θ formed by the lower surface and a central axis of the inlet port is an obtuse angle, and a plurality of grooves being formed radially in an upper portion of said shroud; projection means formed at an upper central portion of the shroud and located immediately below said inlet port for directing input blood component toward said plurality of grooves; bearing means for rotatably supporting the rotator with respect to the housing; motor means for applying a rotational force to the rotator to rotate the rotator; and a plurality of distributing paths defined between said upper cover and said plurality of grooves of the shroud, and communicating with both the inlet port and the outlet port, said distributing paths each having at least a surface which is downwardly inclined from said inlet port toward said outlet port and said distributing paths being separated from each other and out of communication with each other at portions thereof between input and output ends thereof, and each of said distributing paths having a cross sectional area which is substantially constant over the entire length thereof.
Claim 24
Dependent Claim
280 words
A centrifugal type blood pump apparatus for blood components, comprising: a housing forming a substantially cylindrical liquid chamber; an inlet port formed at an upper central portion of said housing and communicating with both a supply source of blood component and said chamber; an outlet port formed in a peripheral portion of said housing and communicating with said chamber, said outlet port comprising an opening in said housing; a rotator rotatably arranged in said chamber and having an upper cover and a lower shroud, a lower surface of the upper cover being inclined such that an angle θ formed by the lower surface and a central axis of the inlet port is an obtuse angle, and a plurality of grooves being formed radially in an upper portion of said shroud; projection means formed at an upper central portion of the shroud and located immediately below said inlet port for directing input blood component toward said plurality of grooves; bearing means for rotatably supporting the rotator with respect to the housing; motor means for applying a rotational force to the rotator to rotate the rotator; and a plurality of distributing paths defined between said upper cover and said plurality of grooves of the shroud, and communicating with both the inlet port and the outlet port, said distributing paths each having at least a surface which is downwardly inclined from said inlet port toward said outlet port and said distributing paths being separated from each other and out of communication with each other at portions thereof between input and output ends thereof, and each of said distributing paths having a cross sectional area which is substantially constant over the entire length thereof.
Claim 25
Dependent Claim
16 words
The blood pump apparatus according to claim 20, wherein each of said distributing paths is bent.
Claim 26
Dependent Claim
16 words
The blood pump apparatus according to claim 20, wherein each of said distributing paths is straight.
Claim 27
Dependent Claim
19 words
The blood pump apparatus according to claim 20, wherein said angle θ is over 90° and less than 105°.
Claim 28
Dependent Claim
66 words
The blood pump apparatus according to claim 20, wherein said upper portion of said shroud is inclined from a center thereof toward the periphery thereof so as to make an obtuse angle with said inlet port, such that each of said distributing paths is downwardly inclined, and an outlet of each of said distributing paths is positioned lower than an inlet of the respective distributing path.
Claim 29
Dependent Claim
46 words
The blood pump apparatus according to claim 20, wherein said opening of the outlet port satisfies the condition of L≧0.4 R, where L denotes a length of a chord of contact with said opening communicating with the chamber, and R represents the radius of the chamber.
Claim 30
Dependent Claim
22 words
The blood pump apparatus according to claim 20, wherein said downwardly inclined surfaces of said distributing paths comprises an upper surface thereof.
Claim 31
Dependent Claim
19 words
The blood pump apparatus according to claim 21, wherein said angle θ is over 90° and less than 105°.
Claim 32
Dependent Claim
18 words
The blood pump apparatus according to claim 22, wherein said θ is over 90° and less than 105°.
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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) | 1997-05-30 | 1997-11-29 | 1998-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-05-30 | 2001-11-29 | 2002-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-05-30 | 2005-11-29 | 2006-05-31 | $7700.00 | Window Closed / Lapsed |