Patent US3750714A successfully refreshed from Google Patents.
US4041303A
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US
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Vehicle headlamps
Assignee: Cibie Projecteurs SA
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Filing: 1975-08-04
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Granted: 1977-08-09
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Expires: 1995-08-04
Abstract
Abstract A pair of vehicle headlamps have front surfaces which are inclined to a central longitudinal plane and the optical axes of the headlamps. Each lens is provided with deflector elements affording a pair of rear surfaces of which one is inclined to the optical axis and one is parallel thereto.
Inventors
- 👤 Jacques Ricard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:52
CPC Classifications
F; F21; F21S; F21S41/00; F21S41/20; F21S41/28
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
108 words
A lighting system for a motor vehicle comprising a right-hand and a left-hand headlamp, the headlamps having optical axes which are substantially parallel to one another and to a central longitudinal plane extending between them, along said vehicle, the head-lamps having front lenses which are symmetrically inclined on either side of the said central plane, each lens having a region of prismatic elements for lateral spread of the beam, each element having a pair of plane surfaces inclined to one another, and intersecting one another along a linear edge; one surface being inclined to the optical axis and the other surface lying exactly parallel to the optical axis.
Claim 2
Dependent Claim
108 words
A lighting system for a motor vehicle comprising a right-hand and a left-hand headlamp, the headlamps having optical axes which are substantially parallel to one another and to a central longitudinal plane extending between them, along said vehicle, the head-lamps having front lenses which are symmetrically inclined on either side of the said central plane, each lens having a region of prismatic elements for lateral spread of the beam, each element having a pair of plane surfaces inclined to one another, and intersecting one another along a linear edge; one surface being inclined to the optical axis and the other surface lying exactly parallel to the optical axis.
Claim 3
Dependent Claim
49 words
A lighting system as claimed in claim 1, in which some of the prismatic elements of one headlamp for an offside beam, have their edges inclined to the vertical, whilst some of the prismatic elements of the other headlamp, for a nearside beam, have their edges extending substantially vertically.
Claim 4
Dependent Claim
36 words
A lighting system as claimed in claim 2, in which some of the prismatic elements of each headlamp have their edges inclined symmetrically so as to provide main beams which illuminate the sides of a road.
References Cited (Backward Citations)
US1319822A
Cited
US1341128A
Cited
US1235675A
Cited
US1788936A
Cited
US2044224A
Cited
US2846568A
Cited
US2855500A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-08-08 | 1981-02-07 | 1981-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-08-08 | 1985-02-07 | 1985-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-08-08 | 1989-02-07 | 1989-08-09 | $7700.00 | Window Closed / Lapsed |