Back to results
US 7,066,622 B2Granted
Flashlight
AssigneeEveready Battery Company, Inc.
InventorDavid J. Alessio
Life of this patent
Estimating the term…
Abstract
A flashlight that can be adjusted to provide different size light patterns at a predefined distance from the light is disclosed. The light patterns are always in-focus thereby providing well defined and uniformly illuminated areas of light. The focusing mechanism utilizes stationary lenses and a movable lens to adjust the diameter of the light pattern without allowing the pattern to become out of focus.
Claims18
A portable light generating device, comprising:
- (a) a housing defining an opening therethrough and having at least one battery disposed therein;
- (b) a light emitting element secured within the housing and electrically coupled to said battery via an electrical circuit;
- (c) a light pipe extending from at least said light emitting element to the opening in said housing;
- (d) a first stationary lens positioned within said light pipe between said light emitting element and the opening in said housing;
- (e) a second stationary lens positioned within said light pipe, said second stationary lens located between said first stationary lens and the opening in said housing;
- (f) an aperture defining component positioned within said light pipe between said second stationary lens and the opening in said housing;
- and
- (g) a movable lens positioned between said aperture defining component and the opening in said housing, wherein the distance between the second stationary lens and the movable lens can be adjusted to sequentially project onto a surface, located at a predefined distance from said light generating device, at least a first in-focus pattern of light having a first diameter and a second in-focus pattern of light having a second diameter, wherein said first and second diameters are different.
5 more elements
Dependencies are inferred from the claim text.