Patent US3593017A successfully refreshed from Google Patents.
US3593017A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Airtight vehicle headlight having one-way valve
Assignee: Cibie Projecteurs SA
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Filing: 1968-12-09
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Granted: 1971-07-13
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Expires: 1988-12-09
Abstract
Abstract Headlight includes a reflector, having a removable bulb located at its focal point, sealed in airtight manner to a glass cover. Rear of bulb connected to a power source. A cap encloses the connection in airtight manner, the cap having a one-way valve permitting air to leave headlight but not to enter.
Inventors
- 👤 Pierre Cibie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:43
CPC Classifications
F; F21; F21S; F21S45/00; F21S45/30; F21S45/33
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
135 words
A vehicle headlamp optical unit comprising a. a reflector, b. a glass cover attached in airtight manner to the front of said reflector, c. a light source between said reflector and glass cover, said light source being capable when energized of emitting both light and heat, and d. means attached in airtight manner to the rear of said reflector making the optical unit as a whole airtight, said means including e. a one-way valve for permitting air To leave the interior of the optical unit but for preventing air from entering the unit, whereby when said light source is energized it heats the air inside the optical unit and causes the air to leave through said one-way valve, the latter preventing reentry of air when said light source is deenergized and the optical unit cools.
Claim 2
Dependent Claim
135 words
A vehicle headlamp optical unit comprising a. a reflector, b. a glass cover attached in airtight manner to the front of said reflector, c. a light source between said reflector and glass cover, said light source being capable when energized of emitting both light and heat, and d. means attached in airtight manner to the rear of said reflector making the optical unit as a whole airtight, said means including e. a one-way valve for permitting air To leave the interior of the optical unit but for preventing air from entering the unit, whereby when said light source is energized it heats the air inside the optical unit and causes the air to leave through said one-way valve, the latter preventing reentry of air when said light source is deenergized and the optical unit cools.
Claim 3
Dependent Claim
32 words
A vehicle headlamp optical unit as defined in claim 1 including an electric wire connecting said light source to a power source, said wire entering the optical unit through said one-way valve.
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) | 1974-07-12 | 1975-01-11 | 1975-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-12 | 1979-01-11 | 1979-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-12 | 1983-01-11 | 1983-07-13 | $7700.00 | Window Closed / Lapsed |