Patent US4252409A successfully refreshed from Google Patents.
US4252409A
Expired / Lapsed
US
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Warning reflector
Assignee: D Swarovski KG
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Filing: 1978-11-27
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Granted: 1981-02-24
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Expires: 1998-11-27
Abstract
Abstract A warning reflector construction is provided comprising a transparent plate having a rear surface opposite a light-entrance surface. The rear surface comprises toric surfaces arranged side-by-side and supporting an outermost reflective layer. The optical axes of the toric surfaces can be arranged at an angle to the perpendicular to the light-entrance surface. The warning reflector can be produced by injection moulding or stamping.
Inventors
- 👤 Kurt Schwab
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 04:47
CPC Classifications
A; A01; A01M; A01M29/00; A01M29/06; A01M29/08; A01M29/10; G; G02; G02B; G02B5/00; G02B5/12; G02B5/136; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/4998; Y10T29/49982; Y10T29/49984
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
41 words
In a warning reflector comprising a transparent plate having a light-entrance surface and a spaced-apart reflective surface from which the reflected light is dispersed, the improvement comprising said reflective surface being formed from a plurality of toric surfaces in side-by-side relation.
Claim 2
Dependent Claim
41 words
In a warning reflector comprising a transparent plate having a light-entrance surface and a spaced-apart reflective surface from which the reflected light is dispersed, the improvement comprising said reflective surface being formed from a plurality of toric surfaces in side-by-side relation.
Claim 3
Dependent Claim
25 words
The warning reflector of claim 1 wherein the optical axes of the toric surfaces are at an angle to the perpendicular to the light-entrance surface.
Claim 4
Dependent Claim
30 words
The warning reflector of claims 1 or 2 wherein the optical axes of the toric surfaces are in two planes at an angle to the perpendicular of the light-entrance surface.
Claim 5
Dependent Claim
34 words
The warning reflector of claims 1 or 2 wherein the angles between the optical axes of the toric surfaces and the perpendicular to the light entrance surface vary in resepect of different toric surfaces.
Claim 6
Dependent Claim
38 words
The warning reflector of claims 1 or 2 wherein the angle between the optical axes of the toric surfaces and the perpendicular to the light-entrance surface amounts to between approximately 5° and 30° in respect of horizontal dispersion.
Claim 7
Dependent Claim
13 words
The warning reflector of claim 5 wherein the angle amounts to approximately 12°.
Claim 8
Dependent Claim
39 words
The warning reflector of claims 1 or 2 wherein the angle between the optical axes of the toric surfaces and the perpendicular to the light entrance surface amounts to between approximately 5° and 40° in respect of vertical dispersion.
Claim 9
Dependent Claim
16 words
The warning reflector of claim 7 wherein the angle amounts to between approximately 15° and 25°.
Claim 10
Dependent Claim
29 words
The warning reflector of claims 1 or 2 wherein the radius of the toric surfaces is between approximately 5 and 25 cm for the curvature in the horizontal direction.
Claim 11
Dependent Claim
29 words
The warning reflector of claims 1 or 2 wherein the radius of the toric surfaces is between approximately 5 and 25 cm for the curvature in the vertical direction.
Claim 12
Dependent Claim
27 words
The warning reflector of claims 1 or 2 wherein the warning reflector is embodied in one piece comprising two plates arranged at an angle to each other.
Claim 13
Dependent Claim
16 words
The warning reflector of claim 11 wherein the angle between the plates amounts to approximately 60°.
Claim 14
Dependent Claim
16 words
The warning reflector of claims 1 or 2 wherein the reflective layer is made of aluminum.
References Cited (Backward Citations)
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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) | 1984-02-24 | 1984-08-25 | 1985-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-02-24 | 1988-08-25 | 1989-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-02-24 | 1992-08-25 | 1993-02-24 | $7700.00 | Window Closed / Lapsed |