US3749906A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vehicle headlamp shield
Assignee: Cooper Industries LLC
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Filing: 1972-03-13
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Granted: 1973-07-31
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Expires: 1992-03-13
Abstract
Abstract This invention relates to a shield to be used in a vehicle headlamp comprising a concave base member with curved or planar side wall sections having a channel member positioned in the central portion of the base member with the base of the channel projecting inwardly from the concave surface to prevent the direct light of the low beam filament from being projected or reflected forwardly as glare or uncontrolled light. The shield also acts to reduce and disperse the light it reflects thereby preventing excessive redirected light in unwanted regions.
Inventors
- 👤 W Thiry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 20:35
CPC Classifications
F; F21; F21S; F21S41/00; F21S41/40; F21S41/43
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
60 words
A shield for use in a headlamp comprising a concave base member and a trough-shaped second member formed by a pair of opposed intersecting elongated surfaces, said trough-shaped second member being positioned in the central portion of said concave base member and at least partially protruding into the volume partially enclosed by the concave surface of said concave base member.
Claim 2
Dependent Claim
60 words
A shield for use in a headlamp comprising a concave base member and a trough-shaped second member formed by a pair of opposed intersecting elongated surfaces, said trough-shaped second member being positioned in the central portion of said concave base member and at least partially protruding into the volume partially enclosed by the concave surface of said concave base member.
Claim 3
Dependent Claim
11 words
The shield of claim 1 wherein said second member is V-shaped.
Claim 4
Dependent Claim
11 words
The shield of claim 1 wherein said second member is U-shaped.
Claim 5
Dependent Claim
24 words
The shield of claim 1 wherein said concave base member is comprised of oppositely disposed side wall sections which have curved and planar portions.
Claim 6
Dependent Claim
13 words
The shield of claim 1 wherein said concave base member is spherically shaped.
Claim 7
Dependent Claim
13 words
The shield of claim 1 wherein said concave base member is conically shaped.
Claim 8
Dependent Claim
17 words
The shield of claim 1 wherein openings are provided in said base member adjacent said second member.
Claim 9
Dependent Claim
96 words
In combination with a headlamp comprising a concave reflector, a headlamp lens, and a source of light positioned between said lens and said reflector, a shield opposite said source of light and positioned between said source of light and said lens, said shield comprising a concave base member and a trough-shaped second member formed by a pair of opposed intersecting elongated surfaces, said trough-shaped second member being positioned in the central portion of said concave base member and at least partially protruding into the volume partially enclosed by the concave surface of said concave base member.
Claim 10
Dependent Claim
96 words
In combination with a headlamp comprising a concave reflector, a headlamp lens, and a source of light positioned between said lens and said reflector, a shield opposite said source of light and positioned between said source of light and said lens, said shield comprising a concave base member and a trough-shaped second member formed by a pair of opposed intersecting elongated surfaces, said trough-shaped second member being positioned in the central portion of said concave base member and at least partially protruding into the volume partially enclosed by the concave surface of said concave base member.
Claim 11
Dependent Claim
87 words
The headlamp and shield of claim 8, wherein said source of light comprises at least one lamp filament and wherein said shield is positioned so thaT said filament is centered relative to said second member and above the intersection of said elongated surfaces forming said second member and wherein a portion of the light from said filament impinges upon said shield and is doubly reflected from said shield, first from said second member to said base member and secondly from said base member to said concave reflector.
Claim 12
Dependent Claim
55 words
The headlamp and shield of claim 9, wherein said concave reflector comprises a heel portion and wherein light from said filament impinges upon said base member and is reflected in a dispersive pattern, a major portion of the light which is so reflected being directed away from said heel portion of said concave headlamp reflector.
Claim 13
Dependent Claim
117 words
A shield for use in a headlamp comprising a concave base member having a pair of opposed, spaced apart side walls defining an opening therebetween, a second member positioned in the central portion of said opening between said side walls to provide spaced openings on opposite sides of said second member, each of said opposed side walls comprising a planar portion positioned intermediate two curved portions, said second member being in the general shape of a V-shaped trough having two intersecting, elongated legs, each of said legs being connected to each of said planar portions, and said second member at least partially protruding into the volume partially enclosed by the concave surface of said concave base member.
Claim 14
Dependent Claim
117 words
A shield for use in a headlamp comprising a concave base member having a pair of opposed, spaced apart side walls defining an opening therebetween, a second member positioned in the central portion of said opening between said side walls to provide spaced openings on opposite sides of said second member, each of said opposed side walls comprising a planar portion positioned intermediate two curved portions, said second member being in the general shape of a V-shaped trough having two intersecting, elongated legs, each of said legs being connected to each of said planar portions, and said second member at least partially protruding into the volume partially enclosed by the concave surface of said concave base member.
Claim 15
Dependent Claim
20 words
The shield of claim 11 wherein the interior angle formed by said legs of said V-shaped second member is 126*.
Claim 16
Dependent Claim
30 words
The shield of claim 11 wherein each of the interior angles formed by said legs of said V-shaped second member and said planar portions of said side walls is 118*.
Claim 17
Dependent Claim
16 words
The shield of claim 13 wherein each of said angles is from about 90* to 135*.
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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) | 1976-07-30 | 1977-01-29 | 1977-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-30 | 1981-01-29 | 1981-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-30 | 1985-01-29 | 1985-07-31 | $7700.00 | Window Closed / Lapsed |