US4468269A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ultracentrifuge rotor
Assignee: Beckman Coulter Inc
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Filing: 1973-03-28
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Granted: 1984-08-28
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Expires: 1993-03-28
Abstract
Abstract An ultracentrifuge rotor comprising a body portion formed as a bowl with a central open chamber defined by a thin, cylindrical wall extending from a supporting base and a plurality of nested rings of filament windings surrounding the cylindrical wall for strengthening and stiffening same. The nested rings result in a uniform filament density throughout the ring assembly.
Inventors
- 👤 Robert S. Carey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:37
CPC Classifications
B; B04; B04B; B04B7/00; B04B7/08; B04B7/085
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
25 words
An ultracentrifuge rotor comprising: a body portion; and a plurality of nested rings of filament windings surrounding said body portion for strengthening and stiffening same.
Claim 2
Dependent Claim
25 words
An ultracentrifuge rotor comprising: a body portion; and a plurality of nested rings of filament windings surrounding said body portion for strengthening and stiffening same.
Claim 3
Dependent Claim
17 words
An ultracentrifuge rotor according to claim 1 wherein said windings are of high strength, high modulus fibers.
Claim 4
Dependent Claim
14 words
An ultracentrifuge rotor according to claim 2 wherein said fibers are made from boron.
Claim 5
Dependent Claim
14 words
An ultracentrifuge rotor according to claim 2 wherein said fibers are made from carbon.
Claim 6
Dependent Claim
19 words
An ultracentrifuge rotor according to claim 2 wherein each of said rings has less than fifteen layers of fibers.
Claim 7
Dependent Claim
21 words
An ultracentrifuge rotor according to claim 2 wherein said fibers are coated with a polymer and encased in an epoxy matrix.
Claim 8
Dependent Claim
37 words
An ultracentrifuge rotor according to claim 1 wherein said body is formed as a bowl with a central open chamber defined by a thin, cylindrical wall extending from a supporting base, said rings surrounding said cylindrical wall.
Claim 9
Dependent Claim
16 words
An ultracentrifuge rotor according to claim 7 wherein said body is solid and made from metal.
Claim 10
Dependent Claim
15 words
An ultracentrifuge rotor according to claim 8 wherein said body metal is a titanium alloy.
Claim 11
Independent Claim
30 words
A method for fabricating an ultracentrifuge rotor comprising the steps of: providing a body portion; and surrounding said body portion with a plurality of thin, nested rings of wound fibers.
Claim 12
Independent Claim
30 words
A method for fabricating an ultracentrifuge rotor comprising the steps of: providing a body portion; and surrounding said body portion with a plurality of thin, nested rings of wound fibers.
Claim 13
Dependent Claim
20 words
A method according to claim 10 further comprising the step of: individually winding said rings on mandrels having different diameters.
Claim 14
Dependent Claim
44 words
A method according to claim 11 wherein the diameters of said mandrels are chosen so that each ring of fibers will have less than fifteen layers of windings and so that said rings may be nested together into one ring of high filament density.
Claim 15
Dependent Claim
43 words
A method according to claim 10 wherein the step of surrounding said body portion comprises the steps of: coating each of said rings with a thin coat of epoxy; and lightly pressing said rings onto each other using very small axial loading pressures.
Claim 16
Dependent Claim
21 words
A method according to claim 13 further comprising the step of curing said nested rings to permit said epoxy to harden.
Claim 17
Dependent Claim
52 words
A reinforced ultracentrifuge rotor comprising: a titanium bowl element; and a plurality of turns of a filamentary material having a lower density, higher modulus of elasticity and higher tensile strength than titanium, secured around the periphery of said rotor element, whereby the maximum rate of rotation of said rotor is substantially increased.
Claim 18
Dependent Claim
52 words
A reinforced ultracentrifuge rotor comprising: a titanium bowl element; and a plurality of turns of a filamentary material having a lower density, higher modulus of elasticity and higher tensile strength than titanium, secured around the periphery of said rotor element, whereby the maximum rate of rotation of said rotor is substantially increased.
Claim 19
Dependent Claim
16 words
A reinforced centrifuge rotor as in claim 15, wherein said filamentary material comprises a boron filament.
Claim 20
Dependent Claim
30 words
A reinforced centrifuge rotor as in claim 15, wherein said filamentary material is preformed in the shape of a sleeve and telescoped over the periphery of said annular rotor element.
Claim 21
Dependent Claim
48 words
A reinforced centrifuge rotor as in claim 15, wherein said filamentary material is formed from a plurality of preformed sleeves of multi-layers of filamentary material, each being formed from a single run of material and telescoped over one another and over the outer periphery of said rotor element.
Claim 22
Dependent Claim
41 words
A reinforced centrifuge rotor as in claim 15, wherein said annular rotor element has an annular groove formed in the outer periphery thereof and, wherein said filamentary material is positioned around the periphery of said rotor element in said annular groove.
References Cited (Backward Citations)
NL87740C
Cited
US3363479A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-08-28 | 1988-02-27 | 1988-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-08-28 | 1992-02-27 | 1992-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-08-28 | 1996-02-27 | 1996-08-28 | $7700.00 | Window Closed / Lapsed |