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US4497465A Expired / Lapsed US ⏱️ 0.0 years remaining

Pivotal mechanism upon which tracking mirrors and the like used in optical systems may be mounted

Assignee: STUFF TECHNOLOGY PARTNERS II Ltd
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Filing: 1983-03-31
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Granted: 1985-02-05
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Expires: 2003-03-31
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Abstract

Abstract Disclosed is a low cost flexural mechanism upon which tracking mirrors and the like used in optical systems may be mounted. The flexural mechanism is made from a single sheet of metal by placing a desired shape or pattern in the metal. The resulting shape is then formed into a base, mounting surface, and flex arms. The mechanism is stiff in directions other than rotation, has low noise, has low thermal sensitivity, and can be made in any practical size. The flexural mechanism can be designed to place the pivot axis at the center of gravity of the mass being rotated, even when the center of gravity is outside the flexural mechanism.

Inventors

  • 👤 Lester M. Yeakley
  • 👤 Karen M. Fitzgerald

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-04 21:36
CPC Classifications
G; G02; G02B; G02B7/00; G02B7/18; G02B7/182; G02B7/1821; F; F16; F16C; F16C11/00; F16C11/04; F16C11/12

Claims Analysis

Total Claims: 7
Claim 1
Independent Claim 227 words
An improved flexural mechanism for pivoting a first object a few degrees plus or minus about an axis of rotation comprising: a plurality of spaced-apart base sections lying in a first plane; a mounting surface lying in a second plane; and a plurality of flex arm pairs coupling said base sections to said mounting surface, each of said pairs comprising a first flex arm extending from a first of said base sections to said mounting surface, and a second flex arm extending from a second of said base sections to said mounting surface, said axis of rotation passing through a point where said first and second flex arms, or the extensions thereof, appear to cross when said mechanism is viewed from an end thereof; said base sections, mounting surface, and flex arm pairs being characterized as initially forming part of an integral sheet of flexible material, which material has a pattern placed therein that defines the size, shape, and location of said base sections, mounting surface, and flex arm pairs; said base sections being affixed to a suitable base material, and said first object being affixed to said mounting surface; whereby if one of said base material or first object is held stationary, the other of said base material or first object may be selectively pivoted a few degrees plus or minus about said axis of rotation.
Claim 2
Dependent Claim 227 words
An improved flexural mechanism for pivoting a first object a few degrees plus or minus about an axis of rotation comprising: a plurality of spaced-apart base sections lying in a first plane; a mounting surface lying in a second plane; and a plurality of flex arm pairs coupling said base sections to said mounting surface, each of said pairs comprising a first flex arm extending from a first of said base sections to said mounting surface, and a second flex arm extending from a second of said base sections to said mounting surface, said axis of rotation passing through a point where said first and second flex arms, or the extensions thereof, appear to cross when said mechanism is viewed from an end thereof; said base sections, mounting surface, and flex arm pairs being characterized as initially forming part of an integral sheet of flexible material, which material has a pattern placed therein that defines the size, shape, and location of said base sections, mounting surface, and flex arm pairs; said base sections being affixed to a suitable base material, and said first object being affixed to said mounting surface; whereby if one of said base material or first object is held stationary, the other of said base material or first object may be selectively pivoted a few degrees plus or minus about said axis of rotation.
Claim 3
Dependent Claim 50 words
The flexural mechanism as defined in claim 1 wherein said flex arms smoothly bend away from said base sections and mounting surface without any sharp creases or folds existing in said flex arms at the junction where said flex arms joint the edges of said base sections and mounting surface.
Claim 4
Dependent Claim 25 words
The flexural mechanism as defined in claim 2 wherein said axis of rotation is located on a line lying between said first and second planes.
Claim 5
Dependent Claim 23 words
The flexural mechanism as defined in claim 2 wherein said axis of rotation is located on a line lying above said second plane.
Claim 6
Dependent Claim 20 words
The flexural mechanism as defined in claim 2 wherein said first object is a mirror used in an optical system.
Claim 7
Dependent Claim 21 words
The flexural mechanism as defined in claim 5 further including means for selectively pivoting said mirror about said axis of rotation.

References Cited (Backward Citations)

US3124873A Cited
US2793028A Cited
US3142888A Cited
US3181851A Cited
US3102721A Cited
US3807029A Cited
US3825992A Cited
US3957316A Cited
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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) 1988-02-05 1988-08-06 1989-02-05 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1992-02-05 1992-08-06 1993-02-05 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1996-02-05 1996-08-06 1997-02-05 $7700.00 Window Closed / Lapsed

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