Patent ID: 7931454

Claim:
A pump device comprising: a case; a drive shaft inserted in the case; a plurality of bearings for supporting the drive shaft and allowing the drive shaft to rotate; and a pump located in the case, the pump being driven by the drive shaft to draw in and discharge fluid; wherein: at least a first one of the plurality of bearings includes: an inner race into which the drive shaft is press fitted; an outer race located in the case so that movement of the outer race in the longitudinal direction of the drive shaft restricted, and a length of the inner race in the longitudinal direction of the drive shaft is greater than a length of the outer race in the longitudinal direction of the drive shaft; and a rolling body is inserted between the inner race and the outer race, and the rolling body restricts relative movement between the inner race and the outer race in the longitudinal direction of the drive shaft; the outer race is fitted into the case with a loose fit, and movement of the outer race is restricted in the longitudinal direction of the drive shaft by a movement-restricting surface of the case, and the movement-restricting surface faces the longitudinal direction of the drive shaft and is in contact with the outer race; and at least a second one of the plurality of bearings includes an inner race into which the drive shaft is inserted with a loose fit.