Patent ID: 9393571
Filing Date: 2016-07-19
CPC Classification: B03C,B23Q,Y02P

Claim Text:
1. A coolant system comprising: a reservoir that stores coolant discharged from a machine tool; a filtering device that filters the coolant in the reservoir; a secondary reservoir fluidically connected with the reservoir, to be supplied with the coolant filtered by the filtering device; a first pump having a suction port in the secondary reservoir, and that feeds the coolant after filtration to the machine tool; and a second pump that feeds the coolant in the reservoir to the filtering device; wherein the reservoir comprises: a reservoir frame; and a partition member that partitions the interior of the reservoir frame into an outer peripheral coolant tub and a central coolant tub and that is formed with a slit extending in the depth direction to make the outer peripheral coolant tub communicate with the central coolant tub, wherein a coolant return extends from the secondary reservoir to the outer peripheral coolant tub for supplying coolant from the secondary reservoir to the outer peripheral coolant tub; wherein a suction port of the second pump is arranged in the central coolant tub; the system further comprising: a first supply port that supplies the central coolant tub with the coolant fed from the machine tool without passing through the outer peripheral coolant tub; and a second supply port that supplies the outer peripheral coolant tub with at least a part of the coolant filtered by the filtering device and fed from the filtering device without passing through the central coolant tub.