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1. EP0830811 - HEAT SINK WITH INTEGRATED BUS BAR

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Claims

1. An electrical circuit board assembly comprising a first circuit board (14) having a front surface and a rear surface, a second circuit board (16) having a front surface and a rear surface, the circuit boards being provided parallel to one another such that the rear surfaces are opposed and adjacent to one another, and a plurality of circuit modules (18) provided on at least one of the surfaces of the first and second circuit boards, the assembly further comprising:

a bus bar (20) provided intermediate the first and second circuit boards and adjacent to the rear surface of the first circuit board, the bus bar being electrically connected to at least one of the circuit modules provided on the first circuit board and at least one of the circuit modules provided on the second circuit board;

a heat sink (30) provided intermediate the first and second circuit boards and adjacent to both the bus bar and the rear surface of the second circuit board, the heat sink being adapted to thermally conduct heat from the bus bar and circuit modules away therefrom and comprising front and rear surfaces; and

a cover (60) provided on the front surface of the heat sink, the cover having at least one aperture (68) formed therein for receipt of an electrical connection extending between the buss bar and at least one of the circuit modules of the first circuit board, so that the bus bar can be electrically connected to circuit modules provided on both the first and second circuit boards.


  2. An electrical circuit board assembly according to claim 1 wherein eight apertures are formed in the cover and eight circuit modules are provided on the first circuit board and are electrically connected to the bus bar through eight electrical connection conduits extending through the eight apertures between the buss bar and the cover.
  3. An electrical circuit board assembly according to claim 1 wherein the cover, in cooperation with the heat sink, substantially encloses the bus bar.
  4. An electrical circuit board assembly according to claim 1 and further comprising insulating material provided between the cover and the bus bar such that the buss bar and heat sink are electrically insulated from one another.
  5. An electrical circuit board assembly according to claim 4 and further comprising insulating material (62,64) provided between the heat sink and the bus bar such that the buss bar and heat sink are electrically insulated from one another.
  6. An electrical circuit board assembly comprising a first circuit board (14) having a front surface and a rear surface, a second circuit board (16) having a front surface and a rear surface, the circuit boards being provided parallel to one another such that the rear surfaces are opposed and adjacent to one another, and a plurality of circuit modules (18) provided on at least one of the surfaces of the first and second circuit boards, the assembly comprising:

a bus bar (20) provided intermediate the first and second circuit boards and adjacent to the rear surface of the first circuit board, the bus bar being electrically connected that least one of the circuit modules (18) provided on the first circuit board and at least one of the circuit modules provided on the second circuit board;

a heat sink (30) provided intermediate the first and second circuit boards and adjacent to both the bus bar and the rear surface of the second circuit board, the heat sink being adapted to thermally conduct heat from the bus bar and circuit modules away therefrom; and

a cover (60) provided on the front surface of the heat sink, the cover having at least one aperture (68) formed therein for receipt of an electrical connection extending between the bus bar and at least one of the circuit modules of the first circuit board, so that the bus bar can be electrically connected to circuit modules provided on both the first, and second circuit boards;

the heat sink (30) comprising eight aperture (72) and eight circuit modules are provided on the second circuit board and are electrically connected to the bus bar through eight electrical connection conduits extending through the eight apertures between the bus bar and the heat sink.


  7. An electrical circuit board assembly according to claim 6 wherein eight circuit modules are provided on the first circuit board and electrically connected to the bus bar.
  8. An electrical circuit board assembly comprising:

a first circuit board (14) having a front surface, a rear surface and at least one circuit module (18) electrically connected to at least one of the front and rear surfaces

a buss bar (20) provided adjacent the rear surface of the first circuit board, the bus bar having a plurality of terminals (56) provided thereon which are electrically connected to circuit modules on the first circuit board; and

a heat sink (30) having front and rear surfaces provided adjacent the bus bar such that the bus bar is intermediate the heat sink and rear surface of the first circuit, board and the heat sink is thermally connected to the circuit modules (18) such that the heat sink is adapted to thermally conduct heat away from the circuit modules; and

a cover (60) on the front surface of the heat sink, the cover having at least one aperture (68) formed therein for receipt of at least one terminal extending from the bus bar to at least one of the circuit modules of the first circuit board, so that the buss bar can be electrically connected to circuit modules provided on the first circuit board.


  9. An electrical circuit board assembly according to claim 8 wherein the cover, in cooperation with the heat sink, substantially encloses the bus bar.
  10. An electrical circuit board assembly according to claim 8 and further comprising insulating material provided between the cover and the bus bar such that the bus bar and heat sink are electrically insulated from one another.
  11. An electrical circuit board assembly according to claim 10 and further comprising insulating material provided between the heat sink and busj bar such that the bus bar and heat sink are electrically insulated from one another.
  12. An electrical circuit board assembly comprising:

first and second circuit boards (14,16) each having at least one circuit module (18) provided thereon;

a bus bar (20) provided intermediate the two circuit boards, the bus bar having a plurality of terminals (56) provided thereon which are electrically connected to circuit modules on both the first and second circuit boards;

a heat sink (30) provided intermediate the two circuit boards, the heal sink being thermally connected to the circuit modules and adapted to thermally conduct heat away from the circuit modules, the heat sink having at least one aperture (72) provided therein for the receipt of at least one buss bar terminal extending from the buss bar to at least one of the circuit modules of the second circuit board and a depression (42) formed in a front surface thereof, the depression being adapted to receive at least a portion of the bus bar therein;

insulating material (64) provided between the heat sink and bus bar such that the bus bar and heat sink are electrically insulated from one another;

a cover (60) provided on the front surface of the heat sink, the cover having at least one aperture (68) formed therein for receipt of at least one terminal extending front the bus bar to at least one of the circuit modules of the first circuit board; and insulating material (62) provided between the cover and the bus bar such that the bus bar and heat sink are electrically insulated from one another.