# US 7,465,071 B2 · Electric light fixture with reflectors

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- Number: US 7,465,071 B2
- Document ID: US7465071B2
- Status: Granted
- Kind: B2
- Application number: 11/430,268
- Filed: 2006-05-08
- Published: 2006-12-28
- Granted: 2008-12-16
- Earliest claimed: 2005-05-23
- Assignees: Hoffmeister Leuchten GmbH
- Inventors: Thomas Beukert; Bodo Kleinhaus; Manfred Draxl
- Web page: https://patentgrep.com/patent/US7465071B2

## CPC

- F21V 7/0025: {Combination of two or more reflectors for a single light source (array of reflectors for a cluster of light sources F21V7/0083)}
- F21S 8/022: {intended to be recessed in a floor or like ground surface, e.g. pavement or false floor}
- F21V 13/10: the elements being reflectors and screens
- F21V 14/04: by movement of reflectors {(in vehicle head lamps F21S41/675)}
- F21W 2131/107: of the exterior of buildings
- F21Y 2103/00: Elongate light sources, e.g. fluorescent tubes
- F21V: FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21S: NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21W: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
- F21Y: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED

## Abstract

A light fixture has an elongated housing having a floor and side walls defining a transversely open and longitudinally extending outlet and a light source extending longitudinally in the housing. A U-section asymmetrical primary reflector extending longitudinally in the housing between the source and the floor is oriented to reflect light from the source out through the outlet. Two longitudinally extending generally triangular-section secondary reflectors extend longitudinally spacedly adjacent one another between the source and the outlet. The secondary reflectors have outwardly concave first sides directed toward each other, concave second sides directed away from each other, and outwardly concave third sides directed toward the source. Thus light from the source is directed back toward the source and the first reflector by the third sides, is scattered outward through the outlet by the second sides, and is directed outward through the outlet by the first sides.

## Claims

### Claim 1

A light fixture comprising:
a housing extending along an axis and having a floor and side walls defining a transversely open and axially extending outlet;
a light source extending axially in the housing and emitting light radially;
a U-section asymmetrical primary reflector extending axially in the housing between the light source and the floor and oriented to reflect light from the light source out through the outlet; and
a pair of longitudinally extending generally triangular-section secondary reflectors extending axially spacedly adjacent one another between the light source and the outlet, the secondary reflectors having longitudinally extending, generally parabolic, and outwardly concave first sides directed toward each other, longitudinally extending outwardly concave and generally parabolic second sides directed away from each other, and longitudinally extending outwardly concave third sides directed toward the source, whereby light from the light source is directed back toward the light source and the U-section asymmetrical primary reflector by the third sides, is scattered outward through the outlet by the second sides, and is directed outward through the outlet by the first sides.

### Claim 2 (depends on 1)

The light fixture defined in claim 1, further comprising
an at least semitransparent lens extending across the outlet.

### Claim 3 (depends on 1)

The light fixture defined in claim 1 wherein the light source is an axially extending fluorescent tube.

### Claim 4 (depends on 1)

The light fixture defined in claim 1 wherein at least some of the reflectors are tippable through up to about 5° about respective axes.