US5213713A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of shaping an electrorheological solid
Assignee: United States Department of the Navy
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Filing: 1991-03-21
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Granted: 1993-05-25
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Expires: 2011-03-21
Abstract
Abstract Electrorheological solids are compositions which undergo phase change fromolid phase to fluid or gel phase when activated by electric field. Objects comprising electrorheological solid compositions can be electrically repaired by electrically inducing solid to fluid phase change. Furthermore, while in fluid phase, the object shape can be altered to render a new object.
Inventors
- 👤 Ronald P. Reitz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:44
CPC Classifications
B; B29; B29C; B29C67/00; B29C67/24; B29C35/00; B29C35/02; B29C35/12; B29C70/00; B29C70/88; B29C70/882; B29K; B29K2995/00; B29K2995/0003; B29K2995/0005
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
99 words
A process for shaping electrorheological solid articles, said process comprising: positioning an electrorheological solid comprising a mixture of thermoplastic phase changing vehicle and electrically polarizable aggregate between at least two electrically conductive surfaces, said electrorheological solid having solid to fluid phase changing means responsive to the passing of an electric current through said electrorheological solid; passing an electric current through said electrorheological solid such that said electrorheological solid becomes a fluid or gel; removing said electric current; forming said fluid or gel into the desired shape; and, allowing said fluid or gel to resolidify to form a solid article.
Claim 2
Dependent Claim
99 words
A process for shaping electrorheological solid articles, said process comprising: positioning an electrorheological solid comprising a mixture of thermoplastic phase changing vehicle and electrically polarizable aggregate between at least two electrically conductive surfaces, said electrorheological solid having solid to fluid phase changing means responsive to the passing of an electric current through said electrorheological solid; passing an electric current through said electrorheological solid such that said electrorheological solid becomes a fluid or gel; removing said electric current; forming said fluid or gel into the desired shape; and, allowing said fluid or gel to resolidify to form a solid article.
Claim 3
Dependent Claim
27 words
A process as claimed in claim 1 wherein said passing of electric current causes said electrorheological solid to undergo phase change from solid phase to fluid phase.
Claim 4
Dependent Claim
94 words
A process for shaping electrorheological solid articles, said process comprising: positioning an electrorheological solid comprising a mixture of thermoplastic phase changing vehicle and electrically polarizable aggregate between at least two electrically conductive surfaces, said electrorheological solid having solid to fluid phase changing means responsive to direct current voltage; electrically charging said conductive surfaces with a direct current voltage such that said electrorheological solid becomes a fluid or gel forming said fluid or gel into the desired shape; removing said electric current; and, allowing said fluid or gel to resolidify to form a solid article.
Claim 5
Dependent Claim
94 words
A process for shaping electrorheological solid articles, said process comprising: positioning an electrorheological solid comprising a mixture of thermoplastic phase changing vehicle and electrically polarizable aggregate between at least two electrically conductive surfaces, said electrorheological solid having solid to fluid phase changing means responsive to direct current voltage; electrically charging said conductive surfaces with a direct current voltage such that said electrorheological solid becomes a fluid or gel forming said fluid or gel into the desired shape; removing said electric current; and, allowing said fluid or gel to resolidify to form a solid article.
Claim 6
Dependent Claim
27 words
A process as claimed in claim 3 wherein said charging with direct current voltage causes said electrorheological solid undergoing phase change from solid phase to fluid phase.
Claim 7
Dependent Claim
85 words
A process comprising: providing means for positioning an electrorheological solid comprising a mixture of thermoplastic phase changing vehicle and electrically polarizable aggregate between at least two electrodes, providing means for causing said solid to become fluid said means for causing including means for applying a direct current to said solid; applying a direct current to said solid such that said solid becomes fluid; removing said electric current; forming said fluid into the desired shape; and, allowing said fluid to resolidify to form a solid article.
Claim 8
Dependent Claim
85 words
A process comprising: providing means for positioning an electrorheological solid comprising a mixture of thermoplastic phase changing vehicle and electrically polarizable aggregate between at least two electrodes, providing means for causing said solid to become fluid said means for causing including means for applying a direct current to said solid; applying a direct current to said solid such that said solid becomes fluid; removing said electric current; forming said fluid into the desired shape; and, allowing said fluid to resolidify to form a solid article.
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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) | 1996-05-24 | 1996-11-23 | 1997-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-05-24 | 2000-11-23 | 2001-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-05-24 | 2004-11-23 | 2005-05-25 | $7700.00 | Window Closed / Lapsed |