US4907133A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Illumination device with a light guide of a liquid-filled plastic flexible tube
Assignee: Individual
•
Filing: 1988-10-26
•
Granted: 1990-03-06
•
Expires: 2008-10-26
Abstract
Abstract In an illumination device comprising a light source and a light guide consisting of a flexible tube of fluoroplastic filled with liquid the filling liquid is a phenylmethyl silicone oil.
Inventors
- 👤 Gunther Nath
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:15
CPC Classifications
G; G02; G02B; G02B6/00; G02B6/02; G02B6/032; G02B6/0001; G02B6/0096; G02B6/24; G02B6/42; G02B6/4298
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
73 words
An illumination device comprising a light guide including a flexible tube which consists at least at the inner side of a carbon fluoropolymer of copolymer and which is sealed at the ends by transparent terminal windows and is filled with a transparent liquid, wherein the filling liquid contains a phenylmethyl silicone oil wherein the silicone oil has valences which are saturated by molecular radicals, more than 20% of said radicals being phenyl groups.
Claim 2
Dependent Claim
73 words
An illumination device comprising a light guide including a flexible tube which consists at least at the inner side of a carbon fluoropolymer of copolymer and which is sealed at the ends by transparent terminal windows and is filled with a transparent liquid, wherein the filling liquid contains a phenylmethyl silicone oil wherein the silicone oil has valences which are saturated by molecular radicals, more than 20% of said radicals being phenyl groups.
Claim 3
Dependent Claim
19 words
An illumination device according to claim 1, wherein the silicone oil contains chains having more than two silicon atoms.
Claim 4
Dependent Claim
23 words
An illumination device according to claim 1, wherein the silicone oil consists of trisiloxanes having four or five phenyl groups or mixtures thereof.
Claim 5
Dependent Claim
15 words
An illumination device according to claim 1, wherein the filling liquid contains a fluorescent dye.
Claim 6
Dependent Claim
20 words
An illumination device according to claim 4, wherein at one end of the plastic flexible tube a reflector is disposed.
Claim 7
Dependent Claim
26 words
An illumination device according to claim 4, wherein at at least one end of the plastic flexible tube a photocell is arranged adjoining the filling liquid.
Claim 8
Dependent Claim
36 words
An illumination device according to claim 1, wherein the flexible tube contains a material selected from the group consisting of a copolymer containing vinylidene fluoride units, a copolymer of tetrafluoroethylene and hexafluoropropylene and a perfluoralkoxy resin.
Claim 9
Dependent Claim
57 words
An illumination device according to claim 1 comprising a light source which is optically coupled to a light entry end of the light guide, wherein at least the terminal window of the light guide facing the light source consists of a glass which absorbs beneath about 320nm and has a similar refractive index to the filling index.
Claim 10
Dependent Claim
15 words
An illumination device according to claim 8, wherein said terminal window consists of flint glass.
Claim 11
Dependent Claim
17 words
An illumination device according to claim 8, wherein the light source contains a tungsten halogen incandescent lamp.
Claim 12
Dependent Claim
26 words
An illumination device according to claim 1 comprising a light source which is optically coupled to the light guide and which contains a tungsten halogen lamp.
Claim 13
Dependent Claim
16 words
An illumination device wherein the filling liquid contains a phenylmethyl silicone oil and a perylene dye.
Claim 14
Dependent Claim
16 words
An illumination device wherein the filling liquid contains a phenylmethyl silicone oil and a perylene dye.
Claim 15
Dependent Claim
20 words
An illumination device according to claim 12, wherein the silicone oil contains a chains having more than two silicon atoms.
Claim 16
Dependent Claim
23 words
An illumination device according to claim 12, wherein the silicone oil consists of trisiloxanes having four or five phenyl groups or mixtures thereof.
Claim 17
Dependent Claim
20 words
An illumination device according to claim 12, wherein at one end or the plastic flexible tube a reflector is disposed.
Claim 18
Dependent Claim
25 words
An illumination device according to claim 12, wherein at least one end of the plastic flexible tube a photocell is arranged adjoining the filling liquid.
Claim 19
Dependent Claim
36 words
An illumination device according to claim 12, wherein the flexible tube contains material selected from the group consisting of a copolymer containing vinylidene fluoride units (TFB), a copolymer of tetrahydroflouroethylene and hexaflouropropylene and perfluoralkoxy resin (PFA).
Claim 20
Dependent Claim
57 words
An illumination device according to claim 12 comprising a light source which is optically coupled to a light entry end of the light guide, wherein at least the terminal window of the light guide facing the light source consists of a glass which absorbs beneath about 320nm and has a similar refractive index to the filling index.
Claim 21
Dependent Claim
15 words
An illumination device according to claim 18, wherein said terminal window consists of flint glass.
Claim 22
Dependent Claim
17 words
An illumination device according to claim 18, wherein the light source contains a tungsten halogen incandescent lamp.
Claim 23
Dependent Claim
26 words
An illumination device according to claim 12 comprising a light source which is optically coupled to the light guide and which contains a tungsten halogen lamp.
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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) | 1993-03-05 | 1993-09-04 | 1994-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-03-05 | 1997-09-04 | 1998-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-03-05 | 2001-09-04 | 2002-03-06 | $7700.00 | Window Closed / Lapsed |