US4451248A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Centrifuge bowl having rotor windage limited disposed thereon
Assignee: Sorvall Products LP
•
Filing: 1981-07-20
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Granted: 1984-05-29
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Expires: 2001-07-20
Abstract
Abstract The container for a centrifuge is characterized by at least one turbulence promoter mounted on the interior surface thereof at a predetermined operative height. The turbulance promoters serve to generate turbulent air flow about a rotor usable interchangeably within the container so as to windage limit the rotational speed of the rotor.
Inventors
- 👤 John F. Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:22
CPC Classifications
B; B04; B04B; B04B9/00; B04B9/10
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
141 words
A container for a centrifuge comprising a sidewall and a floor, the sidewall having a first and a second inwardly directed turbulence promoter mounted thereto, each turbulence promoter having a predetermined height dimension H, a radial inward dimension R and a circumferential dimension C, the lower end of each of the promoters being disposed at a predetermined operative height above the floor so that a substantial portion of each turbulence promoter is radially adjacent to a centrifuge rotating element receivable within the container, the dimensions H, R and C and the operative height of each turbulence promoter being selected such that each turbulence promoter is sized so as to disrupt air flow generated within the container by the rotation of the rotating element to cause fluid friction effects whereby the speed at which the rotating element may rotate is windage limited.
Claim 2
Dependent Claim
141 words
A container for a centrifuge comprising a sidewall and a floor, the sidewall having a first and a second inwardly directed turbulence promoter mounted thereto, each turbulence promoter having a predetermined height dimension H, a radial inward dimension R and a circumferential dimension C, the lower end of each of the promoters being disposed at a predetermined operative height above the floor so that a substantial portion of each turbulence promoter is radially adjacent to a centrifuge rotating element receivable within the container, the dimensions H, R and C and the operative height of each turbulence promoter being selected such that each turbulence promoter is sized so as to disrupt air flow generated within the container by the rotation of the rotating element to cause fluid friction effects whereby the speed at which the rotating element may rotate is windage limited.
Claim 3
Dependent Claim
17 words
The container of claim 1 wherein the first and the second turbulence promoters are substantially diametrically opposed.
Claim 4
Dependent Claim
19 words
The container of claims 1 or 2 wherein each of the turbulence promoters is integrally formed with the sidewall.
Claim 5
Dependent Claim
15 words
The container of claim 4 wherein the axis of each turbulence promoter is substantially vertical.
Claim 6
Dependent Claim
200 words
A centrifuge comprising a casing, a container mounted within the casing, the container having a sidewall and a floor, a rotatable shaft extending centrally and axially upwardly into the region defined by the container, the shaft being adapted to receive one of a predetermined number of rotating elements thereon, the container having a first and a second turbulence promoter disposed on the sidewall thereof and extending radially inwardly of the container, each turbulence promoter having a predetermined height dimension H, a radial inward dimension R and a circumferential dimension C, the lower end of each of the promoters being disposed at a predetermined operative height above the floor so that a substantial portion of each turbulence promoter is radially adjacent to the rotating element received on the shaft as that element is rotated, the dimensions H, R and C and the operative height of each turbulence promoter being selected such that each turbulence promoter being selected such that each turbulence promoter is sized so as to disrupt air flow generated within the container by the rotation of one of the rotating elements to cause fluid friction effects whereby the speed at which the rotating element may rotate is windage limited.
Claim 7
Dependent Claim
200 words
A centrifuge comprising a casing, a container mounted within the casing, the container having a sidewall and a floor, a rotatable shaft extending centrally and axially upwardly into the region defined by the container, the shaft being adapted to receive one of a predetermined number of rotating elements thereon, the container having a first and a second turbulence promoter disposed on the sidewall thereof and extending radially inwardly of the container, each turbulence promoter having a predetermined height dimension H, a radial inward dimension R and a circumferential dimension C, the lower end of each of the promoters being disposed at a predetermined operative height above the floor so that a substantial portion of each turbulence promoter is radially adjacent to the rotating element received on the shaft as that element is rotated, the dimensions H, R and C and the operative height of each turbulence promoter being selected such that each turbulence promoter being selected such that each turbulence promoter is sized so as to disrupt air flow generated within the container by the rotation of one of the rotating elements to cause fluid friction effects whereby the speed at which the rotating element may rotate is windage limited.
Claim 8
Dependent Claim
17 words
The centrifuge of claim 5 wherein the turbulence promoters are disposed substantially diametrically opposed from each other.
Claim 9
Dependent Claim
17 words
The centrifuge of claim 5 wherein each of the turbulence promoters are integrally formed with the sidewall.
Claim 10
Dependent Claim
17 words
The centrifuge of claims 6 or 7 wherein the axis of each turbulence promoter is substantially vertical.
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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) | 1987-05-29 | 1987-11-28 | 1988-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-05-29 | 1991-11-28 | 1992-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-05-29 | 1995-11-28 | 1996-05-29 | $7700.00 | Window Closed / Lapsed |