Patent ID: 7352094

Claim:
An equipment fan, comprising a fan wheel ( 46 ; 348 ) adapted to be driven by an external-rotor motor ( 20 ) whose internal stator ( 60 ; 362 ) is mounted on a hub ( 22 ; 332 ) which in turn is connected via at least one strut ( 74 ; 334 ) to an approximately cylindrical casing part ( 76 ; 336 ) that surrounds an outer side of the fan wheel ( 46 ; 348 ) at a distance; and a housing ( 110 ; 322 ) that is configured for releasable reception of said casing part ( 76 ; 336 ) and in turn is configured for mounting on an object ( 136 , 138 ), and wherein a protrusion ( 98 ; 340 ) is provided on the outer side of the casing part ( 76 ; 336 ); and there is provided in the housing ( 110 ; 322 ) a member ( 120 , 122 , 124 ; 342 , 344 ) for latching of said protrusion ( 98 ; 340 ), into which said protrusion ( 98 ; 340 ) snap-locks when the casing part ( 76 ; 336 ) and the housing ( 110 ; 322 ) are in a predefined position relative to each other.