Lighting units

Patent 5890794 Issued on April 6, 1999. Estimated Expiration Date:

April 3, 2016. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

Patent References

Decorative light tubing
Patent #: 4271458
Issued on: 06/02/1981
Inventor: George, Jr.

Marking light
Patent #: 5065291
Issued on: 11/12/1991
Inventor: Frost, et al.

Lantern and a lens for the same
Patent #: 5224773
Issued on: 07/06/1993
Inventor: Arimura

5237490

Marker light utilizing light emitting diodes disposed on a flexible circuit board
Patent #: 5585783
Issued on: 12/17/1996
Inventor: Hall

Warning light
Patent #: 5630660
Issued on: 05/20/1997
Inventor: Chen

LED lamp Patent #: 5688042
Issued on: 11/18/1997
Inventor: Madadi, et al.

Inventors

Application

No. 627119 filed on 04/03/1996

US Classes:

362/294, With ventilating, cooling or heat insulating means362/183, Rechargeable electrical source of with external connections362/184, Having plural lamp bulbs or lamp sockets362/249, With support362/267, With sealing means or artifical atmosphere362/373, With cooling means362/800LIGHT EMITTING DIODE

Examiners

Primary: Sember, Thomas M.

Attorney, Agent or Firm

Davidge; Ronald V.

International Classes

F21V 029/00
F21L 009/00

Abstract

lighting unit includes a circuit board having a number of LED packages extending outward from a front side. The printed circuit board is covered by a transparent cover, forming an outer cavity between the cover and the printed circuit board. The printed circuit board is supported by a housing, in which a second cavity is formed. In a first embodiment, the circuit board, being flexible, is wrapped around a cylindrical housing, with LED packages being directed radially outward. In a second embodiment, the circuit board is rigid, with LED packages being aligned in a common outward direction. In either embodiment, the outer cavity may be filled with a fluid used to promote cooling the LED packages.