US4733332A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Illuminating device
Assignee: Daikin Industries Ltd
•
Filing: 1985-02-22
•
Granted: 1988-03-22
•
Expires: 2005-02-22
Abstract
Abstract This invention provides an illuminating device characterized in that the device comprises a light-transmitting rod for transmitting the light incident on one end thereof toward the otehr end, a diffusion pattern formed on the outer peripheral surface of the rod by adhering a fine powder of high refractive index in the shape of a line extending continuously or discretely axially of the rod, and a transparent protective tube covering the peripheral surface of the rod with a circumferential clearance formed between the rod and the tube, the clearance between the rod and the protective tube being sealed off at opposite ends thereof.
Inventors
- 👤 Hiroshi Yamashita
- 👤 Kanenaga Fujii
- 👤 Junji Hayakawa
- 👤 Toru Komiyama
- 👤 Shun Koizumi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:58
CPC Classifications
G; G02; G02B; G02B6/00; G02B6/0001; G02B6/0005; G02B6/001; F; F25; F25D; F25D27/00
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
137 words
An illuminating device characterized in that the device comprises: a light-transmitting rod for transmitting the light incident on one end thereof toward the other end, a light-impervious diffusion pattern which is formed on the outer peripheral surface of the rod in the shape of a discrete line extending continuously or discretely axially of the rod and which is capable of diffusing and reflecting the transmitted light incident thereon back through the rod and out an opposite side of the rod in a directional projection, said diffusion pattern comprising a fine powder of high refractive index and an adhesive, and a transparent protective tube covering the peripheral surface of the rod with a circumferential clearance formed between the rod and the tube, the clearance between the rod and the protective tube being sealed off at opposite ends thereof.
Claim 2
Dependent Claim
137 words
An illuminating device characterized in that the device comprises: a light-transmitting rod for transmitting the light incident on one end thereof toward the other end, a light-impervious diffusion pattern which is formed on the outer peripheral surface of the rod in the shape of a discrete line extending continuously or discretely axially of the rod and which is capable of diffusing and reflecting the transmitted light incident thereon back through the rod and out an opposite side of the rod in a directional projection, said diffusion pattern comprising a fine powder of high refractive index and an adhesive, and a transparent protective tube covering the peripheral surface of the rod with a circumferential clearance formed between the rod and the tube, the clearance between the rod and the protective tube being sealed off at opposite ends thereof.
Claim 3
Dependent Claim
25 words
An illuminating device as defined in claim 1 and characterized in that a reflector portion is provided at the emergence end of the light-transmitting rod.
Claim 4
Dependent Claim
31 words
An illuminating device as defined in claim 1 and characterized in that the light-transmitting rod is one selected from among a quartz glass rod, silicone resin rod and optical glass rod.
Claim 5
Dependent Claim
22 words
An illuminating device as defined in claim 1 and characterized in that the light-transmitting rod is 3 to 30 mm in diameter.
Claim 6
Dependent Claim
22 words
An illuminating device as defined in claim 4 wherein the diameter of the light transmitting rod is preferably 5 to 20 mm.
Claim 7
Dependent Claim
32 words
An illuminating device as defined in claim 1 and characterized in that the diffusion pattern is made of at least one fine powder selected from among barium sulfate, magnesia and titania powders.
Claim 8
Dependent Claim
39 words
An illuminating device as defined in claim 1 and characterized in that the fine powder forming the diffusion pattern contains as admixed therewith one of ZnS (bluish green), Eu 2 O 3 (red) and TbO 3 (green) for coloring.
Claim 9
Dependent Claim
52 words
An illuminating device as defined in claim 1 and characterized in that the diffusion pattern comprises the fine powder and a light-resistant transparent adhesive in which the fine powder is admixed for adhering the fine powder directly to the rod and the diffusion pattern has a thichness of at least 0.1 mm.
Claim 10
Dependent Claim
21 words
An illuminating device as defined in claim 8 and characterized in that the light-resistant transparent adhesive is a silicone rubber adhesive.
Claim 11
Dependent Claim
20 words
An illuminating device as defined in claim 8 and characterized in that the light-resistant transparent adhesive is a fluoroelastomer adhesive.
Claim 12
Dependent Claim
27 words
An illuminating device as defined in claim 10 and characterized in that the rod surface coated with the adhesive is formed with an anchor portion for adhesion.
Claim 13
Dependent Claim
43 words
An illuminating device as defined in claim 1 and characterized in that the diffusion pattern comprises a formed silicone rubber material having the fine powder dispersed therein, and the adhesive is a light-resistant transparent adhesive for adhering the formed material to the rod.
Claim 14
Dependent Claim
25 words
An illuminating device as defined in claim 1 and characterized in that the line of the diffusion pattern is 0.5 to 3.0 mm in width.
Claim 15
Dependent Claim
24 words
An illuminating device as defined in claim 13 wherein the width of the line of the diffusion pattern is preferably 1.5 to 2.5 mm.
Claim 16
Dependent Claim
24 words
An illuminating device as defined in claim 1 and characterized in that the diffusion pattern has a uniform width over the entire length thereof.
Claim 17
Dependent Claim
28 words
An illuminating device as defined in claim 1 and characterized in that the diffusion pattern has a width progresssively increasing from the incidence end toward the other end.
References Cited (Backward Citations)
JPS50144450A
Cited
JPS5165852A
Cited
JPS51118741A
Cited
US4195907A
Cited
US4245282A
Cited
US4382272A
Cited
JPS5810702A
Cited
US4637686A
Cited
US4562832A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-03-22 | 1991-09-21 | 1992-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-03-22 | 1995-09-21 | 1996-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-03-22 | 1999-09-21 | 2000-03-22 | $7700.00 | Window Closed / Lapsed |