US4885669A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Headlight device for vehicle
Assignee: Koito Manufacturing Co Ltd
•
Filing: 1988-10-26
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Granted: 1989-12-05
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Expires: 2008-10-26
Abstract
Abstract A headlight device for use in a vehicle and comprising a reflective mirror which is divided into a first portion being effective to form a light distrbution pattern of the central portion, and a second portion being effective to form a light distribution pattern of the left and right side portions.
Inventors
- 👤 Naohi Nino
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 05:58
CPC Classifications
F; F21; F21S; F21S41/00; F21S41/60; F21S41/65; F21S41/663; F21S41/10; F21S41/14; F21S41/162; F21S41/164; F21S41/20; F21S41/25; F21S41/255; F21S41/285; F21S41/30; F21S41/32; F21S41/321; F21S41/323; F21S41/36; F21S41/40; F21S41/43
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
105 words
A headlight device for use in a vehicle and comprising a reflective mirror which is divided into a first portion being effective to form a light distribution pattern of the central portion, and a second portion being effective to form a light distribution pattern of the left and right side portions, said first portion having in a planar projection the shape of a rectangle elongated in a horizontal direction, said second portion being disposed adjacent a long side of said first portion, said first and second portions producing overlapping light distribution patterns in shapes determined substantially entirely by shapes of said first and second portions.
Claim 2
Dependent Claim
105 words
A headlight device for use in a vehicle and comprising a reflective mirror which is divided into a first portion being effective to form a light distribution pattern of the central portion, and a second portion being effective to form a light distribution pattern of the left and right side portions, said first portion having in a planar projection the shape of a rectangle elongated in a horizontal direction, said second portion being disposed adjacent a long side of said first portion, said first and second portions producing overlapping light distribution patterns in shapes determined substantially entirely by shapes of said first and second portions.
Claim 3
Dependent Claim
48 words
A headlight device as set forth in claim 1, wherein the first portion of the reflective mirror has the shape of paraboloid of rotation and the second portion of the reflective mirror has the shape of paraboloid in vertical section and that of straight line in horizontal section.
Claim 4
Dependent Claim
47 words
A headlight device as set forth in claim 1, wherein the first portion of the reflective mirror has the shape of paraboloid of rotation and the second portion of the reflective mirror has the shape of parabola in vertical section and that of ellipse in horizontal section.
Claim 5
Dependent Claim
41 words
A headlight device as set forth in claim 2, wherein the second portion of the reflective mirror is divided into left and right side portions which are arranged such that the light reflected by respective side portions intersect with one another.
Claim 6
Dependent Claim
41 words
A headlight device as set forth in claim 3, wherein the second portion of the reflective mirror is divided into left and right side portions which are arranged such that the light reflected by respective side portions intersect with one another.
Claim 7
Dependent Claim
49 words
A headlight device as set forth in claim 2, wherein the device further comprising an electric bulb having a main filament and a sub-filament which are arranged generally along the optical axis of the reflective mirror with the main filament being generally on the focus of the reflective mirror.
Claim 8
Dependent Claim
49 words
A headlight device as set forth in claim 4, wherein the device further comprising an electric bulb having a main filament and a sub-filament which are arranged generally along the optical axis of the reflective mirror with the main filament being near to the focus of the reflective mirror.
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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) | 1992-12-04 | 1993-06-05 | 1993-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-12-04 | 1997-06-05 | 1997-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-12-04 | 2001-06-05 | 2001-12-05 | $7700.00 | Window Closed / Lapsed |