Patent ID: 7597157
Filing Date: 2009-10-06
Classification: B24B,B25F

Abstract:
1. An electric power tool, having an electric motor located in a housing ( 10 ), and having a cooling device ( 16 , 18 , 20 , 30 , 32 ), wherein the cooling device ( 16 , 18 , 20 , 30 , 32 ) comprises at least one intake nozzle ( 20 ) extending in a longitudinal direction ( 42 ) of the housing ( 10 ), wherein said longitudinal direction ( 42 ) extends parallel to at least one side wall of said housing ( 10 ), wherein said at least one intake nozzle ( 20 ) is mounted in an outer wall of the housing ( 10 ), wherein the cooling device ( 16 , 18 , 20 , 30 32 ) further comprises a cooling conduit ( 30 ) which is located in direct proximity to the at least one intake nozzle ( 20 ) and is separated from the housing ( 10 ) in a direction which is transverse to said longitudinal direction ( 42 ) by means of an additional casing ( 38 ) located between the cooling conduit ( 30 ) and the housing ( 10 ) in the transverse direction, wherein said additional casing ( 38 ) is located in an interior of said housing ( 10 ), wherein said cooling conduit ( 30 ) directly abuts said at least one intake nozzle ( 20 ) and is closed off in direct proximity to said at least one intake nozzle ( 20 ) from an interior of the housing ( 10 ), wherein cooling air reaches the cooling conduit ( 30 ) directly and unhindered in an operating mode, wherein at least two said cooling conduits ( 30 ) are provided, wherein said cooling conduits ( 30 ) in their entirety extend in a direction which is parallel to the longitudinal direction ( 42 ) of the housing ( 10 ) and in their entirety are arranged parallel relative to each other, wherein said cooling conduits ( 30 ) are formed in an interior of said additional casing ( 38 ), wherein at least two said intake nozzles ( 20 ) are provided which extend in said cooling conduits ( 30 ), wherein at each of said two cooling conduits ( 30 ) one of said two intake nozzles ( 20 ) is arranged, and wherein said intake nozzles ( 20 ) and said cooling conduits ( 30 ) are provided to lead cooling air unhindered from said intake nozzles ( 20 ) to a motor housing ( 26 ) in which said electric motor is located.