US 11,969,738 B2
Hydraulic mantle assembly system for a gyratory rock crusher
John Wentworth Bucknell, Brisbane (AU); and Robert Wentworth Bucknell, Brisbane (AU)
Assigned to Technofast Industries Pty. Ltd., (AU)
Appl. No. 17/271,553
Filed by Technofast Industries Pty. Ltd., Brisbane (AU)
PCT Filed Sep. 19, 2019, PCT No. PCT/AU2019/051002
§ 371(c)(1), (2) Date Feb. 25, 2021,
PCT Pub. No. WO2020/073077, PCT Pub. Date Apr. 16, 2020.
Claims priority of application No. 2018247208 (AU), filed on Oct. 9, 2018.
Prior Publication US 2021/0322995 A1, Oct. 21, 2021
Int. Cl. B02C 2/06 (2006.01)
CPC B02C 2/06 (2013.01) 11 Claims
OG exemplary drawing
 
1. A hydraulic mantle system for a gyratory rock crusher, the system comprising:
a main shaft having a flange and external threads adjacent the flange; an annular nut body having side surfaces and having internal threads that are threaded onto the external threads of the main shaft;
an annular hydraulic piston having side surfaces that slidingly engage the side surfaces of the annular nut body;
an annular mantle having an upper neck portion and a lower edge portion, the main shaft extending through the upper neck portion; and
an annular sacrificial cover positioned over the annular nut body, wherein the sacrificial cover is bolted to the annular nut body, wherein the upper neck portion of the annular mantle is compressed between the flange of the main shaft and the annular hydraulic piston.