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Home :: Company Information :: Patents
Continental Design & Engineering Patents
Headlamp Ventilation System
United States Patent
Nagengast et al. |
Patent Number: 4,833,572
Date of Patent: May 23, 1989 |
| HEADLAMP VENTILATION SYSTEM |
| Inventors: |
William E. Nagengast; John M. Luallin, both of
Anderson, Ind. |
| Assignee: |
General Motors Corporation, Detroit, Mich. |
| Appl. No.: |
237803 |
| Filed: |
August 29, 1988 |
| Int. Class: |
F21V 29/00 |
| U.S. Class: |
362/61; 362/294; 362/345 |
| Field of Search: |
362/61, 80, 96, 294, 373, 345, 267 |
References Cited
U.S. PATENT DOCUMENTS |
| 4249232 |
February 1981 |
Dick |
362/61 |
| 4569007 |
February 1986 |
Dick |
362/294 |
|
| 4635173 |
January 1987 |
Dressler et al. |
362/294 |
| 4658339 |
April 1987 |
Tammerijn et al. |
362/373 |
| 4747032 |
May 1988 |
Weber |
362/294 |
FOREIGN PATENT DOCUMENTS |
| 3220704 |
Mar., 1984 |
Fed. Rep. of Germany |
|
| 575976 |
Mar., 1946 |
United Kingdom |
362/294 |
| 2089957 |
Jun., 1982 |
United Kingdom |
362/61 |
Primary Examiner- Ira S. Lazarus
Assistant Examiner- D. M. Cox
Attorney, Agent, or Firm- Edward J. Biskup |
Abstract
A ventilation system for a replaceable bulb headlamp in which the reflector member is formed with at
least two slots in line with and behind the sealant channel and each slot is adapted to slidingly receive
a vent device which establishes a labyrinth-type flow path for air to enter and exit from the interior of
the headlamp.
3 Claims, 3 Drawing Sheets |
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