Patent US3913828A successfully refreshed from Google Patents.
US3913828A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reinforcing ultra-centrifuge rotors
Assignee: Avco Corp
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Filing: 1971-09-02
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Granted: 1975-10-21
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Expires: 1991-09-02
Abstract
Abstract The disclosure illustrates a method and apparatus for reinforcing ultra-centrifuge rotors to enable operation at significantly increased rates. The rotor is selectively reinforced around its periphery by a sleeve comprising a plurality of turns of a boron filament impregnated with a curable epoxy resin. The boron filament may be wound on a spindle to preform a sleeve which then is telescoped over the periphery of the rotor, or it may be wound directly on the rotor itself. An additional variation shows the boron filament wound on various spindles to preform a series of coaxial interfitting sleeves telescoped over the periphery of the rotor.
Inventors
- 👤 Paul A Roy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:11
CPC Classifications
B; B29; B29C; B29C53/00; B29C53/80; B29C53/84; B29C53/845; B04; B04B; B04B7/00; B04B7/08; B04B7/085; B29C63/00; B29C63/0017; B29C63/0021; B29C63/38; B29C63/42; B29K; B29K2063/00; B29K2707/00; B29K2707/02; B29K2707/04; B29L; B29L2031/00; B29L2031/748; B29L2031/7498
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
52 words
A REINFORCED ULTRA-CENTRIFUGE ROTOR COMPRISING: A. A TITANIUM BOWL ELEMENT, AND B. A PLURALITY OF TURNS OF A FILAMENTARY MATERIAL HAVING A LOWER DENSITY,HIGHER MODULUS OF ELASTICITY AND HIGHER TENSILE THAN TITANIUM, SECURED AROUND THE PERIPHERY OF SAID ROTOR ELEMENT WHEREBY THE MAXIMUM RATE OF ROTATION OF SAID ROTOR IS SUBSTANTIALLY INCREASED.
Claim 2
Dependent Claim
52 words
A REINFORCED ULTRA-CENTRIFUGE ROTOR COMPRISING: A. A TITANIUM BOWL ELEMENT, AND B. A PLURALITY OF TURNS OF A FILAMENTARY MATERIAL HAVING A LOWER DENSITY,HIGHER MODULUS OF ELASTICITY AND HIGHER TENSILE THAN TITANIUM, SECURED AROUND THE PERIPHERY OF SAID ROTOR ELEMENT WHEREBY THE MAXIMUM RATE OF ROTATION OF SAID ROTOR IS SUBSTANTIALLY INCREASED.
Claim 3
Dependent Claim
16 words
A reinforced centrifuge rotor as in claim 1 wherein said filamentary material comprises a boron filament.
Claim 4
Dependent Claim
18 words
A reinforced centrifuge rotor as in claim 1 wherein said filamentary material comprises graphite in an epoxy matrix.
Claim 5
Dependent Claim
30 words
A reinforced centrifuge rotor as in claim 1 wherein said filamentary material is preformed in the shape of a sleeve and telescoped over the periphery of said annular rotor element.
Claim 6
Dependent Claim
48 words
A reinforced centrifuge rotor as in claim 1 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 7
Dependent Claim
39 words
A reinforced centrifuge rotor as in claim 1 wherein: said annular rotor element has an annular groove formed in the outer periphery thereof; said filamentary material is positioned around the periphery of said rotor element in said annular groove.
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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) | 1978-10-20 | 1979-04-21 | 1979-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-20 | 1983-04-21 | 1983-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-20 | 1987-04-21 | 1987-10-21 | $7700.00 | Window Closed / Lapsed |