Lighting fixture with thermal isolation

Details Lighting fixture with thermal isolation Lighting fixture with thermal isolation

2006-10-30

2009-02-24

Lee, Jong-Suk (James) (Department: 2885)

Illumination

Light source and modifier

With ventilating, cooling or heat insulating means

C362S373000, C362S418000, C362S427000

Reexamination Certificate

active

07494251

ABSTRACT:
An outdoor lighting fixture is disclosed including a first housing containing the fixture ballast or power supply, a second housing enclosing a lamp. Each of the housings is sealed. A support stem joins the two housings and defines a thermal air gap between the two. The only conductive thermal path between the two housings is through the stem and the fasteners engaging the stem and the two housings. In one embodiment, a plurality of tubular spacers are located on elongated screw fasteners define the size of air gap. In another embodiment a single fastener includes washers defining the air gap size. In that embodiment, the fastener may be hollow and acts as a conduit for the electrical leads for the fixture. In another embodiment one closure for a housing includes fins for cooling the fixture.

REFERENCES:
patent: 4882667 (1989-11-01), Skegin
patent: 4999758 (1991-03-01), Wimberly
patent: 5651606 (1997-07-01), Krogman
patent: 7086759 (2006-08-01), Hartmann et al.
patent: 7156541 (2007-01-01), Yeung
patent: 7296909 (2007-11-01), Van Deursen et al.

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