Patent ID: 8096783

Claim:
An apparatus for delivering the regulated supply of a gas, comprising: a housing; an air feed duct delimited by the housing; a volute, the volute having an inlet opening which is in communication with the air feed duct; an impeller situated immediately downstream of the inlet opening of the volute, the impeller comprising an impeller inlet opening connected to this the inlet opening of the volute and outlet orifices opening into the volute; and a motor configured for driving a rotation of the impeller so as to generate a centrifugal air flow in the volute, wherein: the housing has a first part with a wall which is intended, after assembly, to extend around the motor, espousing a shape of the motor in such a way as to lie at a substantially constant distance from the motor, the housing and the motor between them delimiting a gas flow passage with a gas inlet orifice at an end opposite to the impeller; the housing has a second part with a wall intended, after assembly, to extend around the volute, espousing a shape of the volute so as to lie at a substantially constant distance from the volute, the housing and the volute between them delimiting a gas flow passage extending as far as the inlet opening of the volute; and the housing internally forms a salient axial lump which, after assembly, sits close to a hub of the impeller.