US 11,938,488 B2
Roller crusher and method for operation thereof
Vadim Reznitchenko, Mechanicsburg, PA (US); and Keith Harbold, York, PA (US)
Assigned to Metso Outotec USA Inc., Brookfield, WI (US)
Filed by Metso Outotec USA Inc., Waukesha, WI (US)
Filed on Dec. 9, 2021, as Appl. No. 17/546,215.
Prior Publication US 2023/0182144 A1, Jun. 15, 2023
Int. Cl. B02C 4/40 (2006.01); B02C 4/02 (2006.01)
CPC B02C 4/40 (2013.01) [B02C 4/02 (2013.01)] 22 Claims
OG exemplary drawing
 
1. A scraper device for a roller crusher, comprising:
a rotatable multi head scraper unit having at least two scrapers arranged tangentially about the rotatable multi head scraper unit at a respective radial distance from a rotational axis of the rotatable multi head scraper unit;
a rotation actuator arranged to selectively rotate the rotatable multi head scraper unit to allow operative use of one of the at least two scrapers at a time; and
at least one brake arrangement configured to prevent and/or restrict rotation of the rotatable multi head scraper unit during operation of the one of the at least two scrapers.