US4120459A Impact crusher with retractable and tiltable feed chute
US4120459A US05/554 917 US55491775A US4120459A US 4120459 A US4120459 A US 4120459A US 55491775 A US55491775 A US 55491775A US 4120459 A US4120459 A US 4120459A Authority US United States Prior art keywords chute rotor cam surface pair crankshaft Prior art date 1974 01 16 Legal status The legal status is an assumption and is not a legal