EP0031211A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Motor vehicle lamp reflector
Assignee: ZF International UK Ltd
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Filing: 1980-12-08
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Granted: —
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Expires: 2000-12-08
Abstract
Abstract The rectangular reflector has lateral reflective portions (23, 24) and instead of having upper and lower planar fill-in portions which can result in undesirable reflections, has upper and lower reflective portions (25, 26) which are constituted by an infinite number of non-circular, e.g. parabolic or elliptical, curves. These curves extend forwardly of the reflector body (20) to terminate at the front opening (21) thereof. The curves have foci and focal axes which are coincident and increase progressively in focal length from the centre of the reflector to the lateral reflective portions (23, 24). Such a reflector has improved light collection and light spreading properties.
Inventors
- 👤 Geoffrey Roland Draper
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-29 05:24
CPC Classifications
F; F21; F21S; F21S41/00; F21S41/30; F21S41/32; F21S41/33; F21S41/334; F21S41/335
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
93 words
A rectangular reflector (as defined herein) comprising a dished body having a front opening and an internal reflective surface, said reflective surface having upper, lower and lateral reflective surface portions, characterized in that at least one of the upper and lower reflective surface portions.(25, 26) comprises a multiplicity of non-circular curves extending forwardly of the body (20) to terminate at said front opening (21), said curves having coincident foci, and in that said curves increase in focal length from the centre of the reflective surface. to the lateral reflective surface portions (23, 24).
Claim 2
Dependent Claim
93 words
A rectangular reflector (as defined herein) comprising a dished body having a front opening and an internal reflective surface, said reflective surface having upper, lower and lateral reflective surface portions, characterized in that at least one of the upper and lower reflective surface portions.(25, 26) comprises a multiplicity of non-circular curves extending forwardly of the body (20) to terminate at said front opening (21), said curves having coincident foci, and in that said curves increase in focal length from the centre of the reflective surface. to the lateral reflective surface portions (23, 24).
Claim 3
Dependent Claim
38 words
A reflector as claimed in claim 1, characterized in that there are an infinite number of said non-circular curves which increase progressively in focal length from the centre of the reflective surface to the lateral surface portions(23, 24).
Claim 4
Dependent Claim
27 words
A reflector as claimed in claim 1 or 2, characterized in that both the upper and lower reflective surface portions (25 and 26) comprise said non-circular curves.
Claim 5
Dependent Claim
23 words
A reflector as claimed in claim 1 or 2, characterized in that only the upper reflective surface portion (25) comprises said non-circular curves.
Claim 6
Dependent Claim
45 words
A reflector as claimed in claim 3, characterized in that the non-circular curves of the upper reflective surface portion (25) have foci and focal axes which are conincident with the foci and focal axes of the non-circular curves of the lower reflective surface portion (26).
Claim 7
Dependent Claim
15 words
A reflector as claimed in any preceding claim, characterized in that said curves are parabolic.
Claim 8
Dependent Claim
21 words
7 . A reflector as claimed in any one of claims 1 to 5, characterized in that the curves are elliptical.
Claim 9
Dependent Claim
71 words
A reflector as claimed in any preceding claim, characterized in that the upper half of the reflective surface is stepped relative to the lower half of the reflective surface so that, in effect, there are defined a pair of upper lateral reflective surface portions and a pair of lower lateral reflective surface portions with a step between the upper and lower lateral reflective surface portions at each side of the reflector.
Claim 10
Dependent Claim
54 words
A reflector as claimed in any one of claims 1 to 7, characterized in that two pairs of lateral reflective surface portions are provided, with one pair being disposed outwardly of the other pair, and said other pair of reflective portions having a focal length which is less than that of said one pair.
References Cited (Backward Citations)
No citation records indexed.
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