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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

Headlamp Ventilation System patent image

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