US 12,440,851 B2
Impact crusher, an upper rotor and a hammer
Tapio Korpijaakko, Kuopio (FI); Marko Reinikainen, Joensuu (FI); and Teemu Laasonen, Joensuu (FI)
Assigned to MAICON ENGINEERING OY, Kauniainen (FI)
Appl. No. 18/250,857
Filed by MAICON ENGINEERING OY, Kauniainen (FI)
PCT Filed Oct. 26, 2021, PCT No. PCT/FI2021/050717
§ 371(c)(1), (2) Date Apr. 27, 2023,
PCT Pub. No. WO2022/090620, PCT Pub. Date May 5, 2022.
Claims priority of application No. 20206084 (FI), filed on Oct. 30, 2020.
Prior Publication US 2023/0390785 A1, Dec. 7, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. B02C 13/18 (2006.01); B02C 13/20 (2006.01); B02C 13/28 (2006.01); B02C 19/00 (2006.01)
CPC B02C 13/1835 (2013.01) [B02C 13/1814 (2013.01); B02C 13/20 (2013.01); B02C 13/205 (2013.01); B02C 13/28 (2013.01); B02C 13/2804 (2013.01); B02C 19/0025 (2013.01)] 13 Claims
OG exemplary drawing
 
1. An impact crusher, comprising:
a vertical shaft configured to receive a flow of material to be crushed;
a lower rotor having a vertical axis, configured to receive the material from the vertical shaft and to rotate to a first direction about the vertical axis for accelerating the flow of material;
an upper rotor configured to rotate above the lower rotor to a second direction about the same vertical axis;
said upper rotor comprising a plurality of hammers extending down to rotate at the level of the accelerated flow of material;
the upper rotor comprising:
a first disc;
the plurality of hammers comprising a wear part and a support shaft, wherein the support shafts are connected from a lower position to the first disc; and
a second disc at a distance above the first disc, wherein the support shafts are connected from an upper position to the second disc.