Patent US5218607A successfully refreshed from Google Patents.
Patent US4387848A successfully refreshed from Google Patents.
US4387848A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Centrifuge assembly
Assignee: Terumo BCT Inc
•
Filing: 1977-10-03
•
Granted: 1983-06-14
•
Expires: 1997-10-03
Abstract
Abstract An improved centrifuge assembly comprising a channeled rotor assembly and a fluid container disposed in the channel, whereby the centrifugal separation effects in the fluid container are determined by the geometry of the channel in the rotor. This arrangement is particularly useful for two-stage blood platelet separation. The fluid container is preferably formed from semirigid plastic material and is considered a disposable item to be discarded after a single use. The rotary assembly preferably includes a removable filler piece or center piece formed from a single piece of material, such as rigid plastic, as by machining or molding, and having therein an open-topped channel having dimensions appropriate to receive the semirigid container, which is suitably curved and placed in the channel. Fluid connections are provided from each end of the container and an intermediate point to an axially located multichannel rotating seal. The connections lie in a plurality of radial slots in the filler piece. The channel is divided into two distinct portions, the first portion of the channel being circular with a constant radius, and the second portion being spiral and having a plurality of radiuses, each measured from a different center, the spiral increasing radially outward from its juncture with the first stage. The intermediate fluid connection is established near the junction of the first stage and the second stage. The spiral portion of the channel and container may have an outward slope from bottom to top.
Inventors
- 👤 Robert M. Kellogg
- 👤 Alfred P. Mulzet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:43
CPC Classifications
B; B04; B04B; B04B5/00; B04B5/04; B04B5/0407; B04B5/0428; B04B5/0442; B04B2005/045
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
86 words
A centrifuge assembly comprising a rotor, means providing a two portion channel in said rotor, a first portion of said channel being circular-like and having a constant radius extending from the true center of said rotor, and a second portion of said channel being spiral-like and having a plurality of segments having different radiuses extending from centers displaced from said true center, a disposable elongated container of semirigid material contained in and conforming to said channel, and fluid connections to each end of said elongated container.
Claim 2
Dependent Claim
86 words
A centrifuge assembly comprising a rotor, means providing a two portion channel in said rotor, a first portion of said channel being circular-like and having a constant radius extending from the true center of said rotor, and a second portion of said channel being spiral-like and having a plurality of segments having different radiuses extending from centers displaced from said true center, a disposable elongated container of semirigid material contained in and conforming to said channel, and fluid connections to each end of said elongated container.
Claim 3
Dependent Claim
62 words
A centrifuge assembly for use in a centrifuge having a rotor bowl, comprising, in combination, a filler piece received in said bowl, a channel in said filler piece comprising a circular-like portion and a spiral portion connected seriatim, a disposable elongated container of semirigid material contained in and conforming to said channel, and fluid connections to each end of said elongated container.
Claim 4
Dependent Claim
62 words
A centrifuge assembly for use in a centrifuge having a rotor bowl, comprising, in combination, a filler piece received in said bowl, a channel in said filler piece comprising a circular-like portion and a spiral portion connected seriatim, a disposable elongated container of semirigid material contained in and conforming to said channel, and fluid connections to each end of said elongated container.
Claim 5
Dependent Claim
36 words
A centrifuge assembly as claimed in claim 2, in which said fluid connections comprise an inlet connection to one end of said container, and at least two output connections to the other end of said container.
Claim 6
Dependent Claim
25 words
A centrifuge assembly as claimed in claim 3, further characterized by an output connection to said container at the outlet end of said circular-like portion.
Claim 7
Dependent Claim
19 words
A centrifuge assembly as claimed in claim 2 in which said container is formed from medical grade polyvinyl chloride.
Claim 8
Dependent Claim
26 words
A centrifuge assembly as claimed in claim 2 in which said filler piece is provided with a plurality of radial slots to receive said fluid connections.
Claim 9
Dependent Claim
29 words
A fluid container for a centrifuge assembly as claimed in claim 2, characterized by said fluid container comprising a length of semirigid tubing having a substantially rectangular cross section.
Claim 10
Dependent Claim
30 words
A fluid container for a centrifuge assembly as claimed in claim 7, in which the height and width of the container correspond to the height and width of the channel.
Claim 11
Dependent Claim
36 words
A fluid container for a centrifuge assembly as claimed in claim 2, in which the width of the container in said spiral portion is substantially one-fourth of the width of the container in said circular-like portion.
Claim 12
Dependent Claim
29 words
A centrifuge assembly as claimed in claim 2 in which the top of the spiral portion of the channel has an outward slope for substantially all of its length.
Claim 13
Dependent Claim
40 words
A centrifuge assembly as claimed in claim 2 in which said container is provided with a collecting well at the outlet end thereof, and outlet fluid connections at the outlet end of the container are terminated in said collecting well.
Claim 14
Dependent Claim
69 words
A centrifuge assembly comprising a rotor, means providing a two portion channel in said rotor, a first portion of said channel being circular-like and having a constant radius extending from the true center of said rotor, and a second portion of said channel being spiral-like a disposable elongated container of semi-rigid material contained in and conforming to said channel, and fluid connections to each end of said elongated container.
Claim 15
Dependent Claim
69 words
A centrifuge assembly comprising a rotor, means providing a two portion channel in said rotor, a first portion of said channel being circular-like and having a constant radius extending from the true center of said rotor, and a second portion of said channel being spiral-like a disposable elongated container of semi-rigid material contained in and conforming to said channel, and fluid connections to each end of said elongated container.
Claim 16
Dependent Claim
63 words
A centrifuge assembly comprising a rotor, means providing a two portion channel in said rotor, a first portion of said channel being circular-like and having a constant radius extending from the true center of said rotor, and a second portion of said channel being spiral-like a disposable elongated container contained in said channel, and fluid connections to each end of said elongated container.
Claim 17
Dependent Claim
63 words
A centrifuge assembly comprising a rotor, means providing a two portion channel in said rotor, a first portion of said channel being circular-like and having a constant radius extending from the true center of said rotor, and a second portion of said channel being spiral-like a disposable elongated container contained in said channel, and fluid connections to each end of said elongated container.
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) | 1986-06-13 | 1986-12-13 | 1987-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-06-13 | 1990-12-13 | 1991-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-06-13 | 1994-12-13 | 1995-06-14 | $7700.00 | Window Closed / Lapsed |