Abstract: A conductive device for a brush motor has an insulation stand, a conductive sheet and a conductive wheel. The insulation stand has an open end, a closed end, a supporting rod and a power cord. The supporting rod is mounted in the insulation stand near the open end. The power cord is mounted in the insulation stand and has an outer end extending out of the closed end of the insulation stand. The conductive sheet is curved, is mounted in the insulation stand at the open end around the supporting rod and has a middle and two ends. The conductive wheel is a hollow wheel, is rotatably connected to the insulation stand and has an elastic layer and a conductive layer. The elastic layer is mounted around the supporting rod. The conductive layer is mounted around the elastic layer and contacts the conductive sheet.

Abstract: An LED heat sink having an LED unit and a pipe. The LED unit has a base having a top and an LED chip attached to the top of the base. The pipe has a inlet end, a outlet end, a body, multiple inlets, multiple partitioning walls and multiple partitions. The inlet end is attached to the base of the LED unit. The inlets are defined near the base. The partitioning walls are formed inside the body. The partitions are defined within the body by the partitioning walls and communicate with the inlet end.

Abstract: An LED heat sink having an LED unit and a pipe. The LED unit has a base having a top and an LED chip attached to the top of the base. The pipe has a inlet end, a outlet end, a body, multiple inlets, multiple partitioning walls and multiple partitions. The inlet end is attached to the base of the LED unit. The inlets are defined near the base. The partitioning walls are formed inside the body. The partitions are defined within the body by the partitioning walls and communicate with the inlet end.