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US4916583A
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US
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Vehicular headlamp
Assignee: Koito Manufacturing Co Ltd
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Filing: 1988-12-27
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Granted: 1990-04-10
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Expires: 2008-12-27
Abstract
Abstract Disclosed herein is a vehicular headlamp which comprises a lamp housing having a front portion opened; a lens covering the opening of the front portion; a lamp bulb installed in the lamp housing for generating light when electrically energized; a light reflector installed in the lamp housing for reflecting the light from the lamp bulb toward the lens; an angular position adjustment mechanism for adjusting an angular position of the light reflector relative to the lamp housing; a spirit level fixed to an outer surface of the light reflector to move therewith; and a window structure defined by either one of the lens or the lamp housing, through which the level is viewed from the outside of the headlamp.
Inventors
- 👤 Hidehiko Nagasawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:30
CPC Classifications
B; B60; B60Q; B60Q1/00; B60Q1/02; B60Q1/04; B60Q1/06; B60Q1/068; B60Q1/0683; B60Q1/0686
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
120 words
A vehicular headlamp comprising: a lamp housing having a front portion opened; a lens covering the opening of the front portion; a lamp bulb installed in the lamp housing for generating light when electrically energized; a light reflector installed in said lamp housing for reflecting the light from said lamp bulb toward said lens; angular position adjusting means for adjusting an angular position of said light reflector relative to said lamp housing; a spirit level fixed to an outer surface of said light reflector to move therewith; and a window structure defined by said lens, through which said spirit level is viewed from the outside of said headlamp, said window structure being positioned in the vicinity of said spirit level.
Claim 2
Dependent Claim
120 words
A vehicular headlamp comprising: a lamp housing having a front portion opened; a lens covering the opening of the front portion; a lamp bulb installed in the lamp housing for generating light when electrically energized; a light reflector installed in said lamp housing for reflecting the light from said lamp bulb toward said lens; angular position adjusting means for adjusting an angular position of said light reflector relative to said lamp housing; a spirit level fixed to an outer surface of said light reflector to move therewith; and a window structure defined by said lens, through which said spirit level is viewed from the outside of said headlamp, said window structure being positioned in the vicinity of said spirit level.
Claim 3
Dependent Claim
44 words
A vehicular headlamp as claimed in claim 1, in which said window structure is located at a given portion of said lens, said given portion assuming an upper position with respect to said headlamp when said headlamp is practically mounted to a vehicle body.
Claim 4
Dependent Claim
26 words
A vehicular headlamp as claimed in claim 2, in which said window structure comprises a smoothed part defined by a peripheral wall portion of said lens.
Claim 5
Dependent Claim
28 words
A vehicular headlamp as claimed in claim 3, in which said window structure further comprises a convex lens integrally connected to an inner surface of said smoothed part.
Claim 6
Dependent Claim
34 words
A vehicular headlamp as claimed in claim 2, in which said window structure comprises: means defining an opening formed in a part of said lamp housing; and a transparent plastic plate covering said opening.
Claim 7
Dependent Claim
121 words
A vehicular headlamp comprising: a lamp housing having a front portion opened; a lens covering the opening of the front portion; a lamp bulb installed in the lamp housing for generating light when electrically energized; a light reflector installed in said lamp housing for reflecting the light from said lamp bulb toward said lens; angular position adjusting means for adjusting an angular position of said light reflector relative to said lamp housing; a spirit level fixed to an outer surface of said light reflector to move therewith; and a window structure defined by said lamp housing, through which said spirit level is viewed from the outside of said headlamp, said window structure being positioned in the vicinity of said spirit level.
Claim 8
Dependent Claim
121 words
A vehicular headlamp comprising: a lamp housing having a front portion opened; a lens covering the opening of the front portion; a lamp bulb installed in the lamp housing for generating light when electrically energized; a light reflector installed in said lamp housing for reflecting the light from said lamp bulb toward said lens; angular position adjusting means for adjusting an angular position of said light reflector relative to said lamp housing; a spirit level fixed to an outer surface of said light reflector to move therewith; and a window structure defined by said lamp housing, through which said spirit level is viewed from the outside of said headlamp, said window structure being positioned in the vicinity of said spirit level.
Claim 9
Dependent Claim
45 words
A vehicular headlamp as claimed in claim 6, in which said window structure is located at a given portion of said lamp housing, said given portion assuming an upper position with respect to said headlamp when said headlamp is practically mounted to a vehicle body.
Claim 10
Dependent Claim
26 words
A vehicular headlamp as claimed in claim 7, in which said window structure comprises a smoothed part defined by a peripheral wall portion of said lens.
Claim 11
Dependent Claim
28 words
A vehicular headlamp as claimed in claim 8, in which said window structure further comprises a convex lens integrally connected to an inner surface of said smoothed part.
Claim 12
Dependent Claim
34 words
A vehicular headlamp as claimed in claim 7, in which said window structure comprises: means defining an opening formed in a part of said lamp housing; and a transparent plastic plate covering said opening.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-04-09 | 1993-10-09 | 1994-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-04-09 | 1997-10-09 | 1998-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-04-09 | 2001-10-09 | 2002-04-10 | $7700.00 | Window Closed / Lapsed |