摘要:
A three-gear pump for pumping nonabrasive fluids having a center gear and two outer gears intermeshing with the center gear. Two pivotable and movable peripheral tooth-sealing members having respective arcuate wiping surfaces engage each of the outer gears and the center gear. The sealing members are positioned adjacent the outlets of the pump. The sealing members are capable of only limited movement toward the gears due to respective stop elements integral with the pump housing and respective contact elements integral with the sealing members adapted to engage the stop elements. The sealing members are also pivotable about an axis transverse to the axes of rotation of the gears. As the sealing members wear due to contact with the gear teeth, the contact elements will respectively advance toward the stop elements until they contact one another to transmit the load on the sealing members to the housing.