US4386824A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Motor vehicle lamp reflector
Assignee: Cibie Projecteurs SA
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Filing: 1980-12-17
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Granted: 1983-06-07
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Expires: 2000-12-17
Abstract
Abstract The rectangular reflector has lateral reflective portions and instead of having upper and lower planar fill-in portions which can result in undesirable reflections, has upper and lower reflective portions which are constituted by an infinite number of non-circular, e.g. parabolic or elliptical, curves. These curves extend forwardly of the reflector body to terminate at the front opening thereof. The curves have foci and focal axes which are coincident and increase progressively in focal length from the center of the reflector to the lateral reflective portions. Such a reflector has improved light collection and light spreading properties.
Inventors
- 👤 Geoffrey R. Draper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 01:27
CPC Classifications
F; F21; F21S; F21S41/00; F21S41/30; F21S41/32; F21S41/33; F21S41/334; F21S41/335
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
84 words
A rectangular reflector comprising a dished body having means defining a front opening and an internal reflective surface, said reflective surface having upper, lower and lateral reflective surface portions, wherein at least one of said upper and lower reflective surface portions comprising a muliplicity of non-circular curves extending forwardly of said body to terminate at said front opening, said curves having coincident foci, and said curves increasing in focal length from the centre of the reflective surface portion to said lateral reflective surface portions.
Claim 2
Dependent Claim
84 words
A rectangular reflector comprising a dished body having means defining a front opening and an internal reflective surface, said reflective surface having upper, lower and lateral reflective surface portions, wherein at least one of said upper and lower reflective surface portions comprising a muliplicity of non-circular curves extending forwardly of said body to terminate at said front opening, said curves having coincident foci, and said curves increasing in focal length from the centre of the reflective surface portion to said lateral reflective surface portions.
Claim 3
Dependent Claim
34 words
The reflector according to claim 1, wherein there are an infinite number of said non-circular curves which increase progressively in focal length from the centre of said reflective surface to said lateral surface portions.
Claim 4
Dependent Claim
22 words
The reflector according to claim 1 or 2, wherein both of said upper and lower reflective surface portions comprise said non-circular curves.
Claim 5
Dependent Claim
40 words
The reflector according to claim 3, wherein said non-circular curves of said upper reflective surface portion have foci and focal axes which are coincident with the foci and focal axes of said non-circular curves of said lower reflective surface portions.
Claim 6
Dependent Claim
13 words
The reflector according to claim 1 or 2, wherein said curves are parabolic.
References Cited (Backward Citations)
US1318205A
Cited
US1480364A
Cited
US1546281A
Cited
US1517362A
Cited
US1583768A
Cited
US2077740A
Cited
US2693524A
Cited
US3492474A
Cited
US4351018A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-06-06 | 1986-12-06 | 1987-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-06-06 | 1990-12-06 | 1991-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-06-06 | 1994-12-06 | 1995-06-07 | $7700.00 | Window Closed / Lapsed |