Shaded beam vehicular discharge-type head lamp
US4722039A · kind A · utility
13Cited by
5References
12Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 21, 1987 |
| Grant date | Jan 26, 1988 |
| Priority date | — |
| Expiry date | Jan 21, 2007 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF21S41/17
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
To control the light distribution of light emitted from a high-pressure dharge bulb (1) asymmetrically, to meet automotive head lamp legal and design requirements, a single unitary combination bulb holder and light distribution element (11) is secured to the base sleeve (4) for example by plastic rivets (8) securing a unitary bottom plate (9) to an alignment body (5, 6) which, in turn, is positioned in the base in predetermined relation to a base positioning ring (15) formed thereon. The light distribution body is trough-shaped, with the concave surface (14) facing the bulb, and extends parallel thereto.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.