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. 05, 1988
Filed:
May. 13, 1987
Josef Bals, Lippstadt, DE;
Horst Flerlage, Lippstadt, DE;
Diethard Raeder, Lippstadt, DE;
Dieter Wystrach, Lippstadt, DE;
Klaus Hegemann, Lippstadt, DE;
Hella KG Hueck & Co., Lippstadt, DE;
Abstract
A headlight for a motor vehicle in which an interior space is enclosed by a housing and a cover lens. The interior space communicates with the surrounding outside atmospheric air through a duct that has an inlet opening and an outlet opening. The duct contains reversably-acting hygroscopic desiccating substance which provides less resistance to flow of air into and out of the interior space, than any other leakage points in the headlight. The duct has a portion projecting into the interior space, and has a substantially high permeability for water molecules in a mixture of water-vapor and air. This portion of the duct resists air flow in establishing pressure equilibrium between the inlet opening and the outlet opening of the duct, so that at least a larger part of air in the duct passes through the inlet and outlet openings. One of these openings is in the interior space, whereas the other opening is located in the atmosphere. The aforementioned portion of the duct inhibits transmission of air through walls of the duct, so that maximum air flow passes through the hygroscopic desiccating substance.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile