Patent ID: 7465158
Filing Date: 2008-12-16
Classification: F16H,Y10T

Abstract:
1. A gear pump for circulating lubricating fluid between a reservoir and a cooler for an axle assembly comprising: a first housing section configured to receive an input gear mounted on an input shaft for coupling to a pinion shaft of the axle assembly, the input gear being engaged with a reduction gear inside the first housing section; and a second housing section configured to receive a first pumping gear and a second pumping gear each mounted on a second shaft and a third shaft, respectively, inside the second housing section, the second shaft being coupled to the reduction gear on one end, wherein each of the input gear and the reduction gear is configured in such a way that the rotation speed of the second shaft is lower than the rotation speed of the input shaft thereby the rotation speed of the first and second pumping gears is also lower than the rotation speed of the input shaft.