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US4723825A Expired / Lapsed US ⏱️ 0.0 years remaining

Optical wave guide for irradiation in dentistry

Assignee: Thera Patent GmbH and Co KG Gesellschaft fuer Industrielle Schutzrechte
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Filing: 1986-02-13
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Granted: 1988-02-09
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Expires: 2006-02-13
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Abstract

Abstract An optical wave guide used for irradiation purposes in the dental field comprises a portion (10) tapering from a mean diameter at a radiation-entrance end (13) to a relatively small diameter, an intermediate portion (11) of said small diameter and curved about 90°, and a portion (12) succeeding the curved portion (11) and flaring out from said small diameter to a relatively large diameter at a radiation exit end (14) of the wave guide. Due to the fact that the curved portion (11) has a relatively small diameter it is possible also to minimize the radius of curvature of this portion without causing radiation loss. At the same time a relatively large area is obtained at the radiation-exit end (14) from which the radiation exits uniformly. The optical wave guide configured in this way is especially suitable for sealing occlusal tooth faces onto which the exit end (14) of the wave guide is flatly placed.

Inventors

  • 👤 Wolf-Dietrich Herold

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-03 12:43
CPC Classifications
A; A61; A61C; A61C19/00; A61C19/003; A61C19/004; G; G02; G02B; G02B6/00; G02B6/0001; G02B6/24; G02B6/241; Y; Y10; Y10S; Y10S385/00; Y10S385/902

Claims Analysis

Total Claims: 8
Claim 1
Independent Claim 118 words
An optical wave guide used for irradiation purposes, particularly in the dental field, comprising: (a) an entrance end connectable to a source of radiation, said entrance end having a diameter of about 8 to about 12 mm, (b) an exit end which can be positioned at the locus of irradition, said exit end being larger in diameter than the diameter of said entrance end, and (c) an intermediate curved portion between said entrance and exit ends, the cross-section diameter of the wave guide tapering from said entrance end towards said intermediate portion, being the most reduced in such intermediate portion, and then flaring out toward said exit end at which the diameter of said guide is the greatest.
Claim 2
Dependent Claim 118 words
An optical wave guide used for irradiation purposes, particularly in the dental field, comprising: (a) an entrance end connectable to a source of radiation, said entrance end having a diameter of about 8 to about 12 mm, (b) an exit end which can be positioned at the locus of irradition, said exit end being larger in diameter than the diameter of said entrance end, and (c) an intermediate curved portion between said entrance and exit ends, the cross-section diameter of the wave guide tapering from said entrance end towards said intermediate portion, being the most reduced in such intermediate portion, and then flaring out toward said exit end at which the diameter of said guide is the greatest.
Claim 3
Dependent Claim 28 words
An optical wave guide as claimed in claim 1, wherein said intermediate curved portion has a diameter of about 4 to about 6 mm, perferably about 5 mm.
Claim 4
Dependent Claim 21 words
An optical wave guide as claimed in claim 1, wherein said intermediate curved portion extends through an angle of about 90°.
Claim 5
Dependent Claim 36 words
An optical wave guide as claimed in claim 1, wherein the radius of curvature of said intermediate curved portion, as measured from its center line, is about 7 to about 10 mm, preferably about 8.5 mm.
Claim 6
Dependent Claim 27 words
An optical wave guide as claimed in claim 1, wherein said exit end has a diameter of about 10 to about 20 mm, preferably about 14 mm.
Claim 7
Dependent Claim 30 words
An optical wave guide as claimed in claim 1, further including a filter mounted at said exit end, said filter being supported in a protective sleeve surrounding said wave guide.
Claim 8
Dependent Claim 16 words
An optical wave guide as claimed in claim 1 wherein said guide comprises a solid rod.

References Cited (Backward Citations)

US3825319A Cited
DE7821507U1 Cited
US4317615A Cited
DE2846471A1 Cited
US4445858A Cited
EP0125558A2 Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1991-02-08 1991-08-10 1992-02-09 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1995-02-08 1995-08-10 1996-02-09 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1999-02-08 1999-08-10 2000-02-09 $7700.00 Window Closed / Lapsed

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