US4275851A - Ore sample crusher - Google Patents
Prior patents for crushing small articles have generally related to ice crushers, such as for crushing ice cubes, or the like. U.S. Pat. No. 3,386,669 discloses an ore crushing apparatus for a mining operation in which slurry contained particles of ore too large to pass through a grizzly are crushed by a ram moving one wall of the grizzly ...