The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 24, 1990
Filed:
Jun. 14, 1989
Yutaka Nakata, Isehara, JP;
Ichikoh Industries, Ltd., Tokyo, JP;
Abstract
The projector-type head lamp for vehicles comprises a reflector having an optical axis, a lamp bulb operable as a light source, having a filament horizontally disposed in a direction perpendicular to the optical axis, and a convex lens disposed in an area defined by the light beam shaped by the rays of light reflected by the reflector and having an optical axis nearly coincident with the optical axis of the reflector. The inner reflecting surface of the reflector has a main reflecting area including a part of a spheroid having the first focus near the center of the filament as light source and the second focus near the center of the cut-off edge, at least parts of the main reflecting area located above or below the horizontal plane in which the optical axis lies and which define multiple largely slanted filament images on the screen being formed as sub reflecting areas having such reflecting characteristics as to shift the filament images horizontally. This projector-type head lamp provides a horizontally elongated light distribution pattern of which the profile line is nearly horizontal on the side nearest the vehicle and which contributes to the effective illumination.