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:
Sep. 10, 2019
Filed:
Oct. 03, 2018
Lawrence M. Rice, Hillsboro, NH (US);
Joseph C. Swadel, Hillsboro, NH (US);
Lawrence M. Rice, Hillsboro, NH (US);
Joseph C. Swadel, Hillsboro, NH (US);
OSRAM SYLVANIA Inc., Wilmington, MA (US);
Abstract
A partially coated lamp capsule () for a projection headlamp () has filament () in capsule envelope () having light-transmissive coating () extending from capsule upper region () towards filament distal end () to an axial location in a region defined between about 0.098 inch (2.5 mm) above filament distal end () and about 0.098 inch below filament distal end (), the capsule envelope () being uncoated on an undistorted portion of capsule envelope () below filament proximal end (). Lamp capsule () is useful in projection headlamp () having a reflector () whose central heel () forms the hot spot and casts light through projector lens () to generate low and/or high beam patterns. Present lamp capsules () give increased photometric intensity over conventional lamps in low beam at critical driver's lane (0.6D, 1.3R) and (0.86D, V) test points, and in high beam at the critical (H,V) test point.