Patent ID: 11890646
Assignee: SANDVIK SRP AB
Field: Chemical engineering (Chemistry)
Classification: CPC B | IPC B

Claim 15:
16. A transportation assembly for transportation of materials, comprising:
a shaft having a rotational axis;
a plurality of discs as claimed in claim 1, wherein the plurality of discs are installed on the shaft through the openings of the discs; and
a plurality of spacers, each of the plurality of spacers including a cylindrical main body having a first axial end, a second axial end, an outer surface and a centrally arranged passage, through which passage a centrally arranged axis extends, and at least one ridge extending axially and/or radially on the outer surface of the main body, wherein the at least one ridge-includes a third material, the main body including the third material and/or a fourth material, the third and fourth materials having different wear resistant properties, wherein the plurality of spacers are installed on the shaft through the passages of the spacers, and wherein two adjacent discs are separated by one of the spacers.