US5578146A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aluminum-beryllium alloys having high stiffness and low thermal expansion for memory devices
Assignee: Materion Brush Inc
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Filing: 1996-01-16
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Granted: 1996-11-26
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Expires: 2016-01-16
Abstract
Abstract Articles of manufacture are made of aluminum-beryllium alloys having substantially randomly distributed aluminum-rich and beryllium rich phases to provide substantially isotropic mechanical properties, such as high stiffness and low coefficients of thermal expansion, whereby the articles of manufacture provide more rapid and accurate responses.
Inventors
- 👤 Larry A. Grant
- 👤 James M. Marder
- 👤 Wayne L. Wright
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:57
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/48; G11B5/4806; G11B5/484; B; B22; B22C; B22C9/00; B22C9/02; B22C9/04; C; C22; C22C; C22C1/00; C22C1/04; C22C1/0408; C22C21/00; C22C25/00; G11B21/00; G11B21/02; G11B21/08; G11B21/081; G11B21/083
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
49 words
An article of manufacture having isotropic mechanical properties of high stiffness and low coefficient of thermal expansion made of an alloy consisting essentially of about 40% to about 95% beryllium and the balance essentially aluminum, the alloy having a microstructure of randomly distributed crystals of aluminum-rich and beryllium-rich phases.
Claim 2
Dependent Claim
49 words
An article of manufacture having isotropic mechanical properties of high stiffness and low coefficient of thermal expansion made of an alloy consisting essentially of about 40% to about 95% beryllium and the balance essentially aluminum, the alloy having a microstructure of randomly distributed crystals of aluminum-rich and beryllium-rich phases.
Claim 3
Dependent Claim
19 words
The article of manufacture described in claim 1 wherein the alloy contains between about 55% and about 65% beryllium.
Claim 4
Dependent Claim
40 words
The article of manufacture described in claim 1 wherein the article of manufacture is produced by melting the alloy, casting the molten alloy into an ingot, extruding the ingot to produce a blank and machining the blank into final form.
Claim 5
Dependent Claim
27 words
The article of manufacture described in claim 1 wherein the article of manufacture is produced by melting the alloy and casting the alloy into the desired form.
Claim 6
Dependent Claim
31 words
The article of manufacture described in claim 1 wherein the article of manufacture is produced by consolidating aluminum and beryllium powders into the desired form and then sintering the consolidated form.
Claim 7
Dependent Claim
52 words
An actuator arm for a disk drive having isotropic mechanical properties of high stiffness and low coefficient of thermal expansion made of an alloy consisting essentially of about 40% to about 95% beryllium and the balance essentially aluminum, the alloy having a microstructure of randomly distributed crystals of aluminum-rich and beryllium-rich phases.
Claim 8
Dependent Claim
52 words
An actuator arm for a disk drive having isotropic mechanical properties of high stiffness and low coefficient of thermal expansion made of an alloy consisting essentially of about 40% to about 95% beryllium and the balance essentially aluminum, the alloy having a microstructure of randomly distributed crystals of aluminum-rich and beryllium-rich phases.
Claim 9
Dependent Claim
18 words
The actuator arm described in claim 6 wherein the alloy contains between about 50% and about 75% beryllium.
Claim 10
Dependent Claim
39 words
The actuator arm described in claim 6 wherein the article of manufacture is produced by melting the alloy, casting the molten alloy into an ingot, extruding the ingot to produce a blank and machining the blank into final form.
Claim 11
Dependent Claim
26 words
The actuator arm described in claim 6 wherein the article of manufacture is produced by melting the alloy and casting the alloy into the desired form.
Claim 12
Dependent Claim
29 words
The actuator arm described in claim 6 wherein the actuator arm is produced by consolidating aluminum and beryllium powders into the desired form and then sintering the consolidated form.
Claim 13
Dependent Claim
49 words
An article of manufacture having isotropic mechanical properties of high stiffness and low coefficient of thermal expansion made of an alloy consisting essentially of about 40% to about 49% beryllium and the balance essentially aluminum, the alloy having a microstructure of randomly distributed crystals of aluminum-rich and beryllium-rich phases.
Claim 14
Dependent Claim
49 words
An article of manufacture having isotropic mechanical properties of high stiffness and low coefficient of thermal expansion made of an alloy consisting essentially of about 40% to about 49% beryllium and the balance essentially aluminum, the alloy having a microstructure of randomly distributed crystals of aluminum-rich and beryllium-rich phases.
Claim 15
Dependent Claim
40 words
The article of manufacture described in claim 11 wherein the article of manufacture is produced by melting the alloy, casting the molten alloy into an ingot, extruding the ingot to produce a blank and machining the blank into final form.
Claim 16
Dependent Claim
27 words
The article of manufacture described in claim 11 wherein the article of manufacture is produced by melting the alloy and casting the alloy into the desired form.
Claim 17
Dependent Claim
30 words
The article of manufacture described in claim 11 wherein the article of manufacture is produced by consolidating aluminum and beryllium powders into the desired form and sintering the consolidated form.
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) | 1999-11-26 | 2000-05-27 | 2000-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-11-26 | 2004-05-27 | 2004-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-11-26 | 2008-05-27 | 2008-11-26 | $7700.00 | Window Closed / Lapsed |