Patent ID: 7470104

Claim:
A blower to be driven by a motor to feed a gas, comprising: a vane wheel including a pair of grooves extending circularly to surround a rotational axis of the vane wheel and opening in respective axial directions opposite to each other, and blades extending in a radial direction of the vane wheel in each of the grooves to partition the each of the grooves in a circumferential direction of the vane wheel, and a casing on which the vane wheel is supported in a rotatable manner and which includes a pair of stationary flow paths opening in the axial directions respectively and extending in the circumferential direction to face to the grooves respectively so that the gas urged in the grooves is capable of flowing in the circumferential direction in the stationary flow paths, a guide flow path extending in the axial directions to fluidly communicate with both of the stationary flow paths to enable the gas to flow from one of the stationary flow paths to the other one of the stationary flow paths so that the gas urged by one of the grooves is enabled to be further urged by the other one of the grooves, an inlet port for introducing the gas into the one of the stationary flow paths facing to the one of the grooves and an outlet port for discharging the gas out of the other one of the stationary flow paths facing to the other one of the grooves.