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US4142670A Expired / Lapsed US ⏱️ 0.0 years remaining

Chylomicron rotor

Assignee: Beckman Coulter Inc
•
Filing: 1978-01-27
•
Granted: 1979-03-06
•
Expires: 1998-01-27
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Abstract

Abstract A centrifuge rotor assembly having a resilient liner with at least two separate chambers. Fluid communication between the separate chambers is automatically controlled in response to centrifugation operation of the rotor. When the rotor is stationary, the liner assumes a first position within the rotor where an annular chamber is sealed from a central chamber. When a fluid sample is placed within the liner of the rotor and the rotor is subjected to centrifugation, the centrifugally induced forces of the fluid mixture shift the liner to a second position, opening the sealed condition between the central and annular chambers to permit fluid communication between the respective chambers. When the centrifugation operation has been completed and the rotor returns to its stationary position, the inherent resilient structural characteristics of the liner automatically re-establish the seal between the respective chambers.

Inventors

  • 👤 Kenzo Ishimaru
  • 👤 Lee Gropper

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-26 07:37
CPC Classifications
B; B04; B04B; B04B5/00; B04B5/04; B04B5/0407; B04B5/0428

Claims Analysis

Total Claims: 6
Claim 1
Independent Claim 164 words
A rotor assembly for use with a centrifuge, said rotor comprising: a bottom rotor section having at least two cavities; a top rotor section removably attached to said lower rotor section; and a rotor liner having a lower portion and an upper portion, said lower portion having a central chamber and an annular chamber for receipt of a fluid sample, said liner being positioned within said bottom rotor section, said central and annular chambers forming a annular sealing junction within said liner against which the upper portion of said liner is compressed when said top rotor section is secured to said bottom rotor section, said lower portion of said liner being spaced from the bottom of said cavities when said rotor is stationary, said lower portion of said liner being flexed toward said bottom of said cavities when said rotor is spinning so that said annular sealing junction moves away from said upper portion of said liner to establish fluid communication between said chambers.
Claim 2
Dependent Claim 164 words
A rotor assembly for use with a centrifuge, said rotor comprising: a bottom rotor section having at least two cavities; a top rotor section removably attached to said lower rotor section; and a rotor liner having a lower portion and an upper portion, said lower portion having a central chamber and an annular chamber for receipt of a fluid sample, said liner being positioned within said bottom rotor section, said central and annular chambers forming a annular sealing junction within said liner against which the upper portion of said liner is compressed when said top rotor section is secured to said bottom rotor section, said lower portion of said liner being spaced from the bottom of said cavities when said rotor is stationary, said lower portion of said liner being flexed toward said bottom of said cavities when said rotor is spinning so that said annular sealing junction moves away from said upper portion of said liner to establish fluid communication between said chambers.
Claim 3
Dependent Claim 56 words
A rotor assembly as defined in claim 1, wherein said liner is sufficiently flexible and resilient to cause said annular sealing junction of said liner to return to its orientation in contact with said upper portion of said liner to seal said annular chamber from said central chamber as said rotor decelerates to its stationary position.
Claim 4
Dependent Claim 17 words
A rotor assembly as defined in claim 1, wherein said liner comprises an integral one piece member.
Claim 5
Dependent Claim 27 words
A rotor assembly as defined in claim 1 and additionally comprising means for moving said lower portion of said liner toward said upper portion of said liner.
Claim 6
Dependent Claim 35 words
A rotor assembly as defined in claim 4, wherein said moving means comprises a spring member located between the bottom of one of said cavities and the bottom of said central chamber of said liner.

References Cited (Backward Citations)

US3096283A Cited
US3244363A Cited
US3239136A Cited
US4056225A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1982-03-05 1982-09-04 1983-03-06 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1986-03-05 1986-09-04 1987-03-06 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1990-03-05 1990-09-04 1991-03-06 $7700.00 Window Closed / Lapsed

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