US4555748A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Truncated motor vehicle headlamp
Assignee: General Electric Co
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Filing: 1985-01-22
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Granted: 1985-11-26
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Expires: 2005-01-22
Abstract
Abstract An improved vehicle lamp for forward illumination, such as a headlamp or fog lamp is provided which is substantially devoid of upward directed glare light and which is formed with a synthetic organic polymer material. Heat shield means are disclosed for said vehicle lamp to prevent heat distortion otherwise occurring at the lamp roof by reason of its proximity to the light source used. Said heat shield means can be provided as an integral portion of the lamp roof when molded and further include heat transfer means to dissipate heat from the internal lamp envelope.
Inventors
- 👤 Irving Bradley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:51
CPC Classifications
F; F21; F21V; F21V7/00; F21V7/22; F21S; F21S41/00; F21S41/30; F21S41/32; F21S41/321; F21S41/37; F21S45/00; F21S45/10; F21S45/40; F21S45/47
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
197 words
An improved vehicle headlamp for forward illumination substantially devoid of upwardly directed glare light comprising a concave parabolic enclosed reflector truncated at opposite sides thereof to provide top and bottom flat sections substantially parallel to each other and to the optical axis of a curved portion of the reflector, both of said top and bottom sections being non-reflective and with said top section being substantially closer to said optical axis than said bottom section, a single filament light source contained within said reflector, said light source being enclosed within a bulb, said filament also being devoid of shield means blocking its light rays from being projected to the curved portion of the reflector member, and said light source being positioned substantially on said optical axis and frontwardly of the junctions of said generally flat truncated sections with the reflecting section of the reflector at least in the vicinity of the vertical plane in which the light source lies, wherein the improvement comprises having said reflector formed with a thermoplastic synthetic organic polymer and having a planar metal member forming a part of the flat section above the light source which removes heat from the enclosed reflector member.
Claim 2
Dependent Claim
197 words
An improved vehicle headlamp for forward illumination substantially devoid of upwardly directed glare light comprising a concave parabolic enclosed reflector truncated at opposite sides thereof to provide top and bottom flat sections substantially parallel to each other and to the optical axis of a curved portion of the reflector, both of said top and bottom sections being non-reflective and with said top section being substantially closer to said optical axis than said bottom section, a single filament light source contained within said reflector, said light source being enclosed within a bulb, said filament also being devoid of shield means blocking its light rays from being projected to the curved portion of the reflector member, and said light source being positioned substantially on said optical axis and frontwardly of the junctions of said generally flat truncated sections with the reflecting section of the reflector at least in the vicinity of the vertical plane in which the light source lies, wherein the improvement comprises having said reflector formed with a thermoplastic synthetic organic polymer and having a planar metal member forming a part of the flat section above the light source which removes heat from the enclosed reflector member.
Claim 3
Dependent Claim
25 words
An improved vehicle lamp as in claim 1 wherein said planar metal member further includes heat insulation means located at the polymer and metal junction.
Claim 4
Dependent Claim
215 words
An improved vehicle headlamp for forward illumination substantially devoid of upwardly directed glare light comprising a concave parabolic enclosed reflector truncated at opposite sides thereof to provide top and bottom flat sections substantially parallel to each other and to the optical axis of the curved portion of the reflector, both of said top and bottom sections being non-reflective and with said top section being substantially closer to said optical axis than said bottom section, and a single filament light source contained within said reflector, said filament also being devoid of shield means blocking its light rays from being projected to the curved portion of the reflector member, said light source being enclosed within a bulb, said light source being positioned substantially on said optical axis and frontwardly of the junctions of said generally flat truncated sections with the reflecting section of the reflector at least in the vicinity of the vertical plane in which the light source lies, and said headlamp being devoid of any light shield between said light source and said curved portion of the reflector wherein the improvement comprises having said reflector molded with a thermoplastic synthetic organic polymer and having a planar metal member molded into the top section above the light source which removes heat from the enclosed reflector member.
Claim 5
Dependent Claim
215 words
An improved vehicle headlamp for forward illumination substantially devoid of upwardly directed glare light comprising a concave parabolic enclosed reflector truncated at opposite sides thereof to provide top and bottom flat sections substantially parallel to each other and to the optical axis of the curved portion of the reflector, both of said top and bottom sections being non-reflective and with said top section being substantially closer to said optical axis than said bottom section, and a single filament light source contained within said reflector, said filament also being devoid of shield means blocking its light rays from being projected to the curved portion of the reflector member, said light source being enclosed within a bulb, said light source being positioned substantially on said optical axis and frontwardly of the junctions of said generally flat truncated sections with the reflecting section of the reflector at least in the vicinity of the vertical plane in which the light source lies, and said headlamp being devoid of any light shield between said light source and said curved portion of the reflector wherein the improvement comprises having said reflector molded with a thermoplastic synthetic organic polymer and having a planar metal member molded into the top section above the light source which removes heat from the enclosed reflector member.
Claim 6
Dependent Claim
19 words
An improved vehicle lamp as in claim 3 wherein said planar metal member further includes heat dissipation rib elements.
Claim 7
Dependent Claim
18 words
An improved vehicle lamp as in claim 4 wherein said planar metal member comprises a corrugated metal member.
Claim 8
Dependent Claim
21 words
An improved vehicle lamp as in claim 3 which further includes heat insulation means located at the polymer and metal junction.
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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) | 1988-11-25 | 1989-05-27 | 1989-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-11-25 | 1993-05-27 | 1993-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-11-25 | 1997-05-27 | 1997-11-26 | $7700.00 | Window Closed / Lapsed |