Patent US6146044A successfully refreshed from Google Patents.
US6146044A
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US
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Rotary flexure
Assignee: California Institute of Technology
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Filing: 1998-08-31
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Granted: 2000-11-14
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Expires: 2018-08-31
Abstract
Abstract A rotary flexure is designed to exhibit very high radial and axial stiffness and to exhibit virtually no movement in its center of rotation. The flexure, which is formed from a single billet of material, includes an outer ring from which three thin flexure blades extend. The flexure blades extend toward the centerpoint of the rotary flexure, where they join to form a centerpiece. Three lobes also join at the centerpiece, one between each pair of flexure blades. The lobes extend toward the outer ring, and are free to rotate about the pivot axis with respect to the outer ring and the flexure blades. During rotation, the pivot axis exhibits virtually no movement.
Inventors
- 👤 Robert John Calvet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 11:50
CPC Classifications
F; F16; F16C; F16C11/00; F16C11/04; F16C11/12; B; B33; B33Y; B33Y80/00; Y; Y10; Y10T; Y10T403/00; Y10T403/32; Y10T403/32254; Y10T403/32426; Y10T403/32442; Y10T403/32451; Y10T403/32459; Y10T403/32549; Y10T403/32557; Y10T403/32591; Y10T403/32606; Y10T403/54
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
106 words
A rotary flexure comprising: an outer wall centered on a pivot axis, a central element also centered on the pivot axis, at least three substantially flexible blade elements each depending from the central element at a proximal end and from the outer wall at a distal end, and at least three lobe elements each depending from the central element at a proximal end and extending between the central element and the outer wall, and each being free to rotate about the pivot axis with respect to the outer wall, wherein at least three blade elements and at least three lobe elements are constructed as one piece.
Claim 2
Dependent Claim
106 words
A rotary flexure comprising: an outer wall centered on a pivot axis, a central element also centered on the pivot axis, at least three substantially flexible blade elements each depending from the central element at a proximal end and from the outer wall at a distal end, and at least three lobe elements each depending from the central element at a proximal end and extending between the central element and the outer wall, and each being free to rotate about the pivot axis with respect to the outer wall, wherein at least three blade elements and at least three lobe elements are constructed as one piece.
Claim 3
Dependent Claim
120 words
A rotary flexure comprising: an outer wall centered on a pivot axis; a central element also centered on the pivot axis; at least three blade elements each depending from the central element at a proximal end and from the outer wall at a distal end; at least three lobe elements each depending from the central element at a proximal end and extending between the central element and the outer wall, and each being free to rotate about the pivot axis with respect to the outer wall; at least three notches, each formed in the distal end of one of the lobe elements; and a plurality of detents formed on the outer wall, each detent protruding into one of the notches.
Claim 4
Dependent Claim
120 words
A rotary flexure comprising: an outer wall centered on a pivot axis; a central element also centered on the pivot axis; at least three blade elements each depending from the central element at a proximal end and from the outer wall at a distal end; at least three lobe elements each depending from the central element at a proximal end and extending between the central element and the outer wall, and each being free to rotate about the pivot axis with respect to the outer wall; at least three notches, each formed in the distal end of one of the lobe elements; and a plurality of detents formed on the outer wall, each detent protruding into one of the notches.
Claim 5
Dependent Claim
12 words
The apparatus of claim 1, wherein the blade elements have equal width.
Claim 6
Dependent Claim
16 words
The apparatus of claim 1, wherein the blade elements are evenly spaced about the pivot axis.
Claim 7
Dependent Claim
18 words
The apparatus of claim 1, wherein one of the lobe elements lies between each pair of blade elements.
Claim 8
Dependent Claim
28 words
The apparatus of claim 1, wherein the outer wall, the central element, the blade elements, and the lobe elements all are formed from a single piece of material.
Claim 9
Dependent Claim
25 words
The apparatus of claim 1, wherein the blade elements each have an exposed surface that is recessed below an exposed surface of each lobe element.
References Cited (Backward Citations)
US2735731A
Cited
US3124873A
Cited
US875251A
Cited
US2931092A
Cited
US2907563A
Cited
US3073584A
Cited
US3181918A
Cited
US3277555A
Cited
US3252696A
Cited
US3319951A
Cited
US3360255A
Cited
US3386780A
Cited
US3807029A
Cited
US3811665A
Cited
US3813089A
Cited
US3825992A
Cited
US3909077A
Cited
US4405184A
Cited
US4655629A
Cited
US4637596A
Cited
US4802784A
Cited
US4812072A
Cited
US5209461A
Cited
US5150827A
Cited
US5529277A
Cited
US5620169A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2003-11-14 | 2004-05-15 | 2004-11-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2007-11-14 | 2008-05-15 | 2008-11-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2011-11-14 | 2012-05-15 | 2012-11-14 | $7700.00 | Window Closed / Lapsed |