Patent ID: 7189053

Claim:
A fan arrangement that comprises: a fan ( 10 ) that has a fan housing ( 30 ) within which is arranged a blower wheel ( 18 ) which, in operation, conveys air from an intake side of the fan ( 10 ) to a delivery side; a mounting frame ( 34 ) that is arranged radially outside the fan housing ( 30 ) and resiliently supports the fan arrangement ( 40 ); a membrane ( 32 ), made of an elastic material, which elastically connects the fan housing ( 30 ) and the mounting frame ( 34 ) to one another and is equipped with apertures ( 33 ) that, in the event of a closure of the delivery side of the fan arrangement ( 40 ), enable a return flow, from the delivery side to the intake side of the fan arrangement ( 40 ), of air conveyed by the blower wheel ( 18 ); and wherein the membrane ( 32 ) is connected to the fan housing ( 30 ) substantially over the latter's entire circumference.