Piston with replaceable and/or adjustable surfaces

摘要

A piston for a pump a hub portion defining opposing outer portions, and inserts configured to provide an adjustable surface coupled to each of the opposing outer portions. The hub portion includes a first hub portion and a second hub portion configured to abut one another. Each of the inserts includes an outer shell and a base portion. The first hub portion includes a plurality of the opposing outer portions, and each of the base portions of the inserts is adjustably coupled to respective opposing outer portions of the first hub portion. A pump includes a housing having an inlet and an outlet, and at least two pistons having a hub portion and inserts. The pump may be a positive-displacement, rotary pump, and the pistons may be circumferential pistons.

主权项

1. A piston for a pump, the piston comprising:
a hub portion defining opposing outer portions; and inserts configured to provide an adjustable surface coupled to each of the opposing outer portions, wherein the hub portion comprises a first hub portion and a second hub portion configured to abut one another, wherein each of the inserts comprises an outer shell and a base portion, wherein the first hub portion comprises a plurality of the opposing outer portions, wherein each of the base portions of the inserts is adjustably coupled to respective opposing outer portions of the first hub portion, wherein each the opposing outer portions of the first hub portion comprises a raised portion and a recess, and wherein the raised portion comprises at least one bore configured to receive a fastener configured to couple one of the inserts to the first hub portion.