Patent ID: 11971022
Assignee: GRACO MINNESOTA INC.
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F  B | IPC F

Claim 15:
16. A pumping system for pumping abrasive material, the pumping system comprising:
a transfer pump configured to draw material from a vessel and pump the material downstream through a first conduit, the transfer pump formed by the pump of claim 1; and
a metering pump connected to the first conduit to receive the material from the transfer pump, the metering pump configured to pump the material downstream through a downstream conduit to an applicator, the metering pump comprising:
a metering pump body;
a first metering seal supported by the metering pump body;
a metering cylinder sleeve supported by the metering pump body;
a metering piston at least partially disposed within the metering pump body and configured to reciprocate along a metering pump axis;
a metering piston sleeve mounted on the metering piston, wherein the metering piston sleeve interfaces with the first metering seal during reciprocation of the metering piston; and
a metering piston seal mounted on the metering piston and interfacing with the metering cylinder sleeve, wherein the metering piston seal is an only portion of the metering piston interfacing with the metering cylinder sleeve during reciprocation of the metering piston.