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1. (WO2019008431) PIEZOELECTRIC ENERGY HARVESTING BENDING STRUCTURE AND THE METHOD OF MANUFACTURING THEREOF
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CLAIMS

What is claimed is:

1. A piezoelectric bimorph cantilever beam system comprising:

a shim including a first main surface, a second main surface opposite the first main surface, a proximal end connected to an anchor, and a distal end opposite the proximal end; a first piezoelectric layer laminated on the first main surface of the shim;

a second piezoelectric layer laminated on the second main surface of the shim;

a first beam stiffener provided over the first main surface of the shim adjacent to the anchor, the first beam stiffener at least partially covering the first piezoelectric layer; and a second beam stiffener provided over the second main surface of the shim adjacent to the anchor, the second beam stiffener at least partially covering the second piezoelectric layer.

2. The system according to claim 1, wherein the first beam stiffener, the second beam stiffener, or both the first beam stiffener and the second beam stiffener have a variable thickness decreasing from the anchor towards the distal end of the shim.

3. The system according to claim 2, wherein the first beam stiffener, the second beam stiffener, or both the first beam stiffener and the second beam stiffener have a substantially flat exterior surface.

4. The system according to claim 2, wherein the first beam stiffener, the second beam stiffener, or both the first beam stiffener and the second beam stiffener have a curved exterior surface.

5. The system according to claim 1, wherein the first beam stiffener, the second beam stiffener, or both the first beam stiffener and the second beam stiffener comprise multiple layers stacked on the piezoelectric layer with each of the multiple layers decreasing in length extending away from the shim.

6. The system according to claim 5, wherein one or more of the multiple layers is comprised of a material having a composition different than a material of another of the multiple layers.

7. The system according to claim 1, wherein the first beam stiffener, the second beam stiffener, or both the first beam stiffener and the second beam stiffener define a plurality of holes varying in size based on its location along the shim.

8. The system according to claim 7, wherein the plurality of holes increase in size from the anchor towards the distal end of the shim.

9. The system according to claim 7, wherein the plurality of holes are filled with a material different than the material of the remaining beam stiffener.

10. The system according to claim 6, wherein the plurality of holes are symmetrical about a center line running a length of the shim.

11. The system according to claim 5, one or more of the multiple layers define a plurality of holes varying in size based on its location along the shim.

12. A piezoelectric bimorph cantilever beam system comprising:

a shim including a first main surface, a second main surface opposite the first main surface, a proximal end connected to an anchor, and a distal end opposite the proximal end; a first piezoelectric layer laminated on the first main surface of the shim;

a second piezoelectric layer laminated on the second main surface of the shim; and a first beam stiffener provided over the first main surface of the shim adjacent to the anchor, the first beam stiffener at least partially covering the first piezoelectric layer.

13. The system according to claim 12, wherein the first beam stiffener has a variable thickness decreasing from the anchor towards the distal end of the shim.

14. The system according to claim 12, wherein the first beam stiffener comprises multiple layers stacked on the shim with each of the multiple layers decreasing in length extending away from the shim.

15. The system according to claim 12, wherein the first beam stiffener defines a plurality of holes varying in size based on its location along the shim.

16. The system according to claim 12, wherein the plurality of holes increase in diameter from the anchor towards the distal end of the shim.

17. A piezoelectric bimorph cantilever beam system comprising:

an anchoring module having a side surface;

a shim including a proximal end connected to the anchoring module, a distal end opposite the proximal end, a first main surface, and a second main surface opposite the first main surface;

a first piezoelectric layer laminated on the first main surface of the shim;

a second piezoelectric layer laminated on the second main surface of the shim;

a first beam stiffener incorporated into the anchoring module and extending over the first main surface of the shim to at least partially cover the first piezoelectric layer; and

a second beam stiffener incorporated into the anchoring module and extending over the second main surface of the shim to at least partially cover the second piezoelectric layer.

18. The system according to claim 17, wherein the first beam stiffener, the second beam stiffener, or both the first beam stiffener and the second beam stiffener have a substantially flat exterior surface.

19. The system according to claim 17, wherein the first beam stiffener, the second beam stiffener, or both the first beam stiffener and the second beam stiffener have a curved exterior surface.