Water-resistant illumination apparatus

• US 20070133203A1
• Filed: 02/21/2006
• Published: 06/14/2007
• Est. Priority Date: 12/14/2005
• Status: Active Grant

• Current Assignee: Bradnam' S Window & Doors Pty Limited
• Original Assignee: Bradnam' S Window & Doors Pty Limited
• Inventors: Chen, Chuen-Shing
• Granted Patent: US 7,465,066 B2
• Time in Patent Office: Days
• US Class Current: 362/235
• CPC Class Codes: F21V 13/02 Combinations of only two kinds of elements
• CPC Class Codes: F21V 15/01 Housings, e.g. material or assembling of housing parts F21V15/02 takes precedence housings forming signs or letters G09F13/04
• CPC Class Codes: F21V 29/773 the planes containing the fins or blades having the direction of the light emitting axis
• CPC Class Codes: F21V 29/89 Metals
• CPC Class Codes: F21V 31/00 Gas-tight or water-tight arrangements
• CPC Class Codes: F21V 31/005 Sealing arrangements therefor
• CPC Class Codes: F21V 5/04 of lens shape
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]

Abstract

An illumination apparatus includes a heat-conductive tubular housing. A lighting device includes: a heat dissipating plate positioned in the housing and disposed adjacent to an open front end of the housing; lighting units, each having a light emitting diode mounted on a circuit board in thermal contact with the heat dissipating plate, and a condensing member mounted on the circuit board and disposed around the light emitting diode; and a driving unit disposed fixedly in the housing, connected electrically to the circuit board, and coupled electrically to an external power source for activating the light emitting diodes. A seal washer is disposed among and abuts against the housing, a transparent plate in front of the lighting units, and an annular cap mounted on the front end of the housing, so as to establish a liquid-tight seal thereamong.

Claims

1. An illumination apparatus comprising:

a tubular housing made of a heat conductive material, configured with a receiving space, and having an open front end, and a closed rear end opposite to said front end in an axial direction of said housing;

a lighting device disposed in said receiving space in said housing, said lighting device including

a heat dissipating plate positioned in said housing and disposed adjacent to said front end of said housing, said heat dissipating plate having a mounting surface that faces said front end of said housing,

a circuit board in thermal contact with said mounting surface of said heat dissipating plate,

a plurality of lighting units, each of which has a light emitting diode mounted on said circuit board, and a condensing member mounted on said circuit board and disposed around said light emitting diode, and

a driving unit disposed fixedly in said housing, connected electrically to said circuit board, and adapted to be coupled electrically to an external power source for activating said light emitting diodes of said lighting units;

a transparent plate disposed in said housing and in front of said lighting units;

an annular cap mounted on said front end of said housing and extending into said receiving space; and

a seal washer disposed among and abutting against said housing, said transparent plate and said cap so as to establish a liquid-tight seal thereamong.

2. The illumination apparatus as claimed in claim 1, further comprising a cellular grating plate disposed in said housing and between said lighting units and said transparent plate.

3. The illumination apparatus as claimed in claim 1, wherein said housing has an annular outer surface formed with a grip.