Patent US4772987A successfully refreshed from Google Patents.
US4772987A
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Headlight for antifog lamp for automotive vehicles
Assignee: Robert Bosch GmbH
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Filing: 1986-05-08
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Granted: 1988-09-20
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Expires: 2006-05-08
Abstract
Abstract In a headlight for antidazzle lamps for motor vehicles, a reflector and a shield or screen, and an objective form a light beam illuminating a roadway in accordance with law requirements. The lower portion of the reflector forms a paraboloid-ellipsoid-shaped section which generates an additional light beam below the screen and the objective. The additional light beam is received by horizontal scattering prisms on a transparent pane.
Inventors
- 👤 Heinz Kretschmer
- 👤 Gerhard Lindae
- 👤 Ernst Merkl
- 👤 Peter Perthus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:08
CPC Classifications
F; F21; F21S; F21S41/00; F21S41/30; F21S41/32; F21S41/33; F21S41/334; F21S41/336
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
125 words
A headlight for an antidazzle or anti-fog lamp for motor vehicles, comprising a light source; a reflector reflecting light rays from the light source, said reflector having a vertical and a horizontal meridian portions formed by curves of high order; a shield positioned in a path of rays reflected by said reflector for forming a twilight limit of a light beam; an objective positioned in the path of rays passing said shield for forming the light beam transmitted to a roadway; an optical means for generating an additional light beam adjacent to the first mentioned light beam, said optical means being positioned in a lower region of said reflector and reflecting only the light rays which are inefficient for forming the first mentioned light beam.
Claim 2
Dependent Claim
125 words
A headlight for an antidazzle or anti-fog lamp for motor vehicles, comprising a light source; a reflector reflecting light rays from the light source, said reflector having a vertical and a horizontal meridian portions formed by curves of high order; a shield positioned in a path of rays reflected by said reflector for forming a twilight limit of a light beam; an objective positioned in the path of rays passing said shield for forming the light beam transmitted to a roadway; an optical means for generating an additional light beam adjacent to the first mentioned light beam, said optical means being positioned in a lower region of said reflector and reflecting only the light rays which are inefficient for forming the first mentioned light beam.
Claim 3
Dependent Claim
24 words
The headlight as defined in claim 1, wherein said optical means is at least one portion of said reflector in the lower region thereof.
Claim 4
Dependent Claim
19 words
The headlight as defined in claim 2, wherein said portion of said reflector is a portion of a paraboloid.
Claim 5
Dependent Claim
80 words
The headlight as defined in claim 2, wherein said portion of said reflector is comprised of at least one left-hand section and one right-hand section as viewed in a plan view of said portion in a direction towards said objective relative to a vertical axis which extends through said light source, an optical axis of the left-hand section being pivotable to the right and an optical axis of the right-hand section being pivotable to the left about said vertical axis.
Claim 6
Dependent Claim
34 words
The headlight as defined in claim 4, wherein said portion of said reflector is a portion of a paraboloid-ellipsoid which has a vertical meridian section of paraboloid and a horizontal meridian section of ellipsoid.
Claim 7
Dependent Claim
23 words
The headlight as defined in claim 1, further including horizontal scattering means positioned in a path of rays of said additional light beam.
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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) | 1991-09-20 | 1992-03-21 | 1992-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-09-20 | 1996-03-21 | 1996-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-09-20 | 2000-03-21 | 2000-09-20 | $7700.00 | Window Closed / Lapsed |