US4098455A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary seal distributor member for a centrifuge
Assignee: Baxter International Inc
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Filing: 1977-03-29
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Granted: 1978-07-04
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Expires: 1997-03-29
Abstract
Abstract A rotary distributor seal for a rotary centrifuge which comprises a tubular housing having sealed ends, a relatively rotatable fluid conveying apertured spindle coaxially mounted in the housing, and several resilient, spaced ring seals positioned about the spindle to seal the annular space between the spindle and the housing, and to subdivide it into several annular chambers. Ports communicate with the chambers to provide fluid flow from the ports through the separate chambers and through the spindle. In accordance with this invention, support members are positioned in alternate, spaced chambers between pairs of ring seals to prevent collapse of the ring seal pairs together.
Inventors
- 👤 David W. Ammann
- 👤 David A. Bates
- 👤 Daniel B. Granzow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 02:22
CPC Classifications
B; B04; B04B; B04B5/00; B04B5/04; B04B5/0442
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
164 words
In a rotary distributor seal for a centrifuge which comprises a tubular housing having sealed ends, a relatively rotatable, fluid-containing apertured spindle coaxially mounted in said housing and projecting from an end thereof, and a plurality of resilient, spaced ring seals positioned about said spindle to seal the annular space between said spindle and the inner surface of said housing, and to subdivide said annular space into a plurality of axially spaced, annular chambers; and ports communicating with said chambers through said housing, to provide fluid flow paths from said ports to said separate chambers and through said spindle, the improvement comprising, support members positioned in alternate, spaced chambers between pairs of ring seals to prevent collapse of said ring seal pairs together, each support member comprising a rigid ring positioned about said spindle and spaced therefrom, a first opposed pair of sections of said ring occupying a first plane, and a second opposed pair of sections of said ring occupying a second plane.
Claim 2
Dependent Claim
164 words
In a rotary distributor seal for a centrifuge which comprises a tubular housing having sealed ends, a relatively rotatable, fluid-containing apertured spindle coaxially mounted in said housing and projecting from an end thereof, and a plurality of resilient, spaced ring seals positioned about said spindle to seal the annular space between said spindle and the inner surface of said housing, and to subdivide said annular space into a plurality of axially spaced, annular chambers; and ports communicating with said chambers through said housing, to provide fluid flow paths from said ports to said separate chambers and through said spindle, the improvement comprising, support members positioned in alternate, spaced chambers between pairs of ring seals to prevent collapse of said ring seal pairs together, each support member comprising a rigid ring positioned about said spindle and spaced therefrom, a first opposed pair of sections of said ring occupying a first plane, and a second opposed pair of sections of said ring occupying a second plane.
Claim 3
Dependent Claim
30 words
The rotary distributor seal of claim 1 in which said spindle carries a transversely positioned cross bar to engage a stationary member during operation to prevent rotation of said spindle.
Claim 4
Dependent Claim
21 words
The rotary distributor seal of claim 2 which includes four resilient spaced ring seals to define four axially spaced, annular chambers.
Claim 5
Dependent Claim
24 words
The rotary distributor seal of claim 1 in which ball bearing means are provided to facilitate the relative rotation between said spindle and housing.
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) | 1981-07-03 | 1982-01-02 | 1982-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-07-03 | 1986-01-02 | 1986-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-07-03 | 1990-01-02 | 1990-07-04 | $7700.00 | Window Closed / Lapsed |