US4876776A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making piezoelectric composites
Assignee: BAE Systems Electronics Ltd
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Filing: 1988-02-11
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Granted: 1989-10-31
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Expires: 2008-02-11
Abstract
Abstract A method of fabricating a piezoelectric composite comprising an array of piezoelectric elements and a reinforcement structure embedded in a material. The method includes the step of forming the reinforcement structure prior to assembly with the piezoelectric elements, the reinforcement structure defining an array of holes for receiving the piezoelectric elements.
Inventors
- 👤 Roger W. Whatmore
- 👤 Andrew G. Munns
- 👤 David W. Lane
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 13:00
CPC Classifications
H; H10; H10N; H10N30/00; H10N30/01; H10N30/09; H10N30/092; H10N30/80; H10N30/85; H10N30/852; Y; Y10; Y10T; Y10T29/00; Y10T29/42
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
106 words
A method of fabricating a piezoelectric composite comprising an array of piezoelectric elements and a reinforcement structure embedded in a matrix material, wherein the improvement lies in that the method comprises forming the reinforcement structure, prior to assembly with the piezoelectric elements, as a reinforcement cage by weaving a strand of reinforcing fibrous material into a multi-layered cage-like structure defining an array of holes therethrough for receiving and supporting the piezoelectric elements during the fabrication of the piezoelectric composite, inserting the piezoelectric elements into the array of holes through the reinforcement cage and casting the matrix material around the resulting structure to form the piezoelectric composite.
Claim 2
Independent Claim
106 words
A method of fabricating a piezoelectric composite comprising an array of piezoelectric elements and a reinforcement structure embedded in a matrix material, wherein the improvement lies in that the method comprises forming the reinforcement structure, prior to assembly with the piezoelectric elements, as a reinforcement cage by weaving a strand of reinforcing fibrous material into a multi-layered cage-like structure defining an array of holes therethrough for receiving and supporting the piezoelectric elements during the fabrication of the piezoelectric composite, inserting the piezoelectric elements into the array of holes through the reinforcement cage and casting the matrix material around the resulting structure to form the piezoelectric composite.
Claim 3
Dependent Claim
20 words
A method of fabricating a piezoelectric composite as claimed in claim 1 wherein the reinforcement cage has a mesh-like configuration.
Claim 4
Dependent Claim
24 words
A method of fabricating a piezoelectric composite as claimed in claim 1 wherein the reinforcement cage is in the form of a woven mesh.
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) | 1992-10-30 | 1993-05-01 | 1993-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-10-30 | 1997-05-01 | 1997-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-10-30 | 2001-05-01 | 2001-10-31 | $7700.00 | Window Closed / Lapsed |