Patent ID: 8858016

Claim:
An LED heat sink apparatus ( 20 ) comprising; a housing ( 22 ) with a side wall ( 24 ) disposed about an axis (A) to define a chamber ( 26 ) and extending between a closed end ( 28 ) closing said chamber ( 26 ) and an open end ( 30 ) opening said chamber ( 26 ), a lens ( 60 ) coupled with said closed end ( 28 ) of said housing ( 22 ), a downward platform ( 82 ) connected with said side wall ( 24 ) of said housing ( 22 ) in said chamber ( 26 ) to define a bottom cavity ( 84 ) of said chamber ( 26 ) between said downward platform ( 82 ) and said lens ( 60 ) and a central cavity ( 88 ) of said chamber ( 26 ) between said downward platform ( 82 ) and said closed end ( 28 ) of said housing ( 22 ), at least one LED ( 94 ) coupled with said downward platform ( 82 ) in said bottom cavity ( 84 ) for emitting light through said lens ( 60 ), said downward platform ( 82 ) defining a plurality of holes ( 106 , 108 , 116 , 118 ) for passing air between said bottom cavity ( 84 ) and said central cavity ( 88 ), a seal assembly ( 62 ) sealing said lens ( 60 ) to said open end ( 30 ) of said housing ( 22 ) to seal said chamber ( 26 ), and characterized by, said downward platform ( 82 ) further defining a solid ring ( 104 ) having a substantially impervious surface disposed radially outwardly from and about said LED to divide said holes ( 106 , 108 , 116 , 118 ) into at least one chimney hole ( 106 , 116 , 118 ) disposed radially inwardly from said solid ring ( 104 ) and said LED ( 94 ) for directing hot air heated by said LED and concentrated near said chimney hole ( 106 , 116 , 118 ) in said bottom cavity ( 84 ) of said chamber ( 26 ) into said central cavity ( 88 ) and at least one return hole ( 108 ) disposed radially outwardly from said solid ring ( 104 ) and near said side wall ( 24 ) of said housing ( 22 ) for directing cool air in said central cavity ( 88 ) of said housing ( 22 ) that has been cooled by said side wall ( 24 ) of said housing ( 22 ) through said return hole ( 108 ) and into said bottom cavity ( 84 ).