CROSS BLADE FLEXURE PIVOT AND METHODS OF USE THEREOF

• US 20130308997A1
• Filed: 03/13/2013
• Published: 11/21/2013
• Est. Priority Date: 05/16/2012
• Status: Active Grant

• Current Assignee: RSSJ HOLDINGS, LLC
• Original Assignee: C-Flex Bearing Co., Inc.
• Inventors: SMITH, Wayne A.
• Granted Patent: US 9,212,691 B2
• Time in Patent Office: Days
• US Class Current: 403/119
• CPC Class Codes: B33Y 80/00 Products made by additive manufacturing
• CPC Class Codes: F16C 11/12 incorporating flexible connections, e.g. leaf springs
• CPC Class Codes: F16C 2220/04 by injection-moulding
• CPC Class Codes: F16C 2220/20 by sintering pulverised material, e.g. powder metallurgy
• CPC Class Codes: F16C 2300/02 General use or purpose, i.e. no use, purpose, special adaptation or modification indicated or a wide variety of uses mentioned
• CPC Class Codes: F16C 2370/20 Optical, e.g. movable lenses or mirrors; Spectacles
• CPC Class Codes: G02B 26/10 Scanning systems
• CPC Class Codes: Y10T 403/32606 Pivoted

Abstract

The present invention relates to a device that can be used as, inter alia, a cross blade flexure pivot, with the cross blade flexure pivot comprising a monolithic structure. The present invention also relates to a method for preparing a monolithic cross blade flexure pivot using injection molding. Also provided is a mold for use in this injection molding method. The present invention also relates to a method for preparing a monolithic cross blade flexure pivot using selective laser sintering, as well as to the three-dimensional digital descriptions used in this method. The present invention also relates to a method of providing non-frictional rotational support to a mechanical component. The present invention also relates to systems that include the cross blade flexure pivot device.

Claims

1. A cross blade flexure pivot comprising a monolithic structure, said monolithic structure comprising:

a top platform and a bottom platform, each of which has an inner surface, wherein the inner surface of the top platform and the inner surface of the bottom platform face one another and are substantially parallel to one another; and

at least one pair of crossing flat flexure elements that function as springs and that intersect independent of one another to provide an axis of rotation for the top and bottom platforms along a projected line that extends through the intersection of the pair of crossing flat flexure elements,

wherein a first flexure element of the pair of flexure elements extends from a first end of the inner surface of the top platform to an opposite second end of the inner surface of the bottom platform, and

wherein a second flexure element of the pair of flexure elements extends from a second end of the inner surface of the top platform to an opposite first end of the inner surface of the bottom platform.

2. The cross blade flexure pivot according to claim 1, wherein an angle formed between a central plane of either the top or bottom platform and a central plane of either the first or second flexure element is an angle of greater than 0 degrees and less than 90 degrees.

3. The cross blade flexure pivot according to claim 1 further comprising:

a mounting support comprising a projection that extends downward from a side of the top platform so that the inner surface of the mounting support faces the axis of rotation formed by the intersection of the pair of crossing flat flexure elements, and so that the projection extends at least beyond the axis of rotation.

4. The cross blade flexure pivot according to claim 3, wherein the inner surface of the mounting support is disposed a distance from the nearest flat flexure element so as to form a gap therebetween.

5. The cross blade flexure pivot according to claim 4, wherein the gap is formed by providing a top platform having a side that extends beyond the opposing side of the bottom platform, so that extending the mounting support downward from the extended side of the top platform resulting in said gap.

6. The cross blade flexure pivot according to claim 3, wherein the mounting support further comprises a post that extends outward from the outward surface of the mounting support.

7. The cross blade flexure pivot according to claim 6, wherein the post is aligned with the axis of rotation formed by the intersection of the pair of crossing flat flexure elements.

8. The cross blade flexure pivot according to claim 3, wherein the mounting support further comprises a hole for inserting a separate post therethrough for mounting purposes, said hole being disposed in a position aligned with the axis of rotation formed by the intersection of the pair of crossing flat flexure elements.

9. The cross blade flexure pivot according to claim 1, wherein said monolithic structure comprises one pair of crossing flat flexure elements.

10. The cross blade flexure pivot according to claim 1, wherein said monolithic structure comprises more than one pair of crossing flat flexure elements.

11. The cross blade flexure pivot according to claim 1 further comprising:

a third flexure element that is substantially the same as the first flexure element in structure and orientation, said second flexure element being disposed between the first and third flexure elements.

12. The cross blade flexure pivot according to claim 1, wherein said monolithic structure comprises a plastic composition.

13. The cross blade flexure pivot according to claim 12, wherein said plastic composition is selected from the group consisting of DuPont Zytel, Delrin, Schulatec, Ryton, Vespel, polypropylene, nylon, Torlon, and the like.

14. The cross blade flexure pivot according to claim 1, wherein said monolithic structure comprises a metallic composition.

15. The cross blade flexure pivot according to claim 14, wherein said metallic composition is selected from the group consisting of stainless steel, titanium, aluminum, carbon steel, nickel alloys, beryllium copper, and the like.

16. A method for preparing a monolithic cross blade flexure pivot, said method comprising:

providing a mold configured to form, by injection molding, the cross blade flexure pivot according to claim 1; and

injecting molding material into the mold under conditions effective to yield the monolithic cross blade flexure pivot.

21. A mold for preparing, by injection molding techniques, a cross blade flexure pivot according claim 1.

22. A method for preparing a monolithic cross blade flexure pivot, said method comprising:

providing a three-dimensional digital description of the monolithic cross blade flexure pivot according to claim 1; and

performing selective laser sintering (SLS) to produce the monolithic cross blade flexure pivot according to said three-dimensional digital description.

27. A three-dimensional digital description that is effective for use in producing, by selective laser sintering (SLS), a monolithic cross blade flexure pivot according to claim 1.

28. A method of providing non-frictional rotational support to a mechanical component, said method comprising:

providing a monolithic cross blade flexure pivot according to claim 1; and

functionally mounting the monolithic cross blade flexure pivot to a mechanical component so that the mechanical component pivots from a starting position to an ending position in response to an applied force, and then returns to the starting position due to reverse torsional spring force generated by the monolithic cross blade flexure pivot.

30. A system comprising a monolithic cross blade flexure pivot according to claim 1 coupled to at least one mechanical component functionally coupled to the pivot.

17-20. -20. (canceled)

23-26. -26. (canceled)

29. (canceled)

31. (canceled)