LED flashlight with switch actuated by turning a lens tube

Details LED flashlight with switch actuated by turning a lens tube LED flashlight with switch actuated by turning a lens tube

2007-04-19

2009-06-09

O'Shea, Sandra L (Department: 2875)

Illumination

Self powered lamp

Cylindrical flashlight casing

C362S800000

Reexamination Certificate

active

07543953

ABSTRACT:
A flashlight includes a first or top section attached to a second or base section. The top section has one or more elements that are axially moveable relative to the base section, for focusing light. This movement may be achieved, for example, by having the top and base sections joined via screw threads, and by rotating one section relative to the other. One or more lenses are supported in the top section. An LED or other light source is supported on a base or heat sink on the base section. As the sections move relative to each other, a switch is actuated turning the LED on, and the lens moves relative to the LED, focusing light from the LED. The base section has a housing forming a battery compartment. Electronic components are encapsulated in a potting compound, such as thermally conductive epoxy, to improve heat transfer from the components, and to better resist environmental affects.

REFERENCES:
patent: 4823242 (1989-04-01), Maglica et al.
patent: 5871272 (1999-02-01), Sharrah et al.
patent: 5904414 (1999-05-01), Monteleone et al.

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