US3532277A Gyratory crusher Google Patents
US3532277A US3532277DA US3532277A US 3532277 A US3532277 A US 3532277A US 3532277D A US3532277D A US 3532277DA US 3532277 A US3532277 A US 3532277A Authority US United States Prior art keywords spring piston hydraulic cylinder crushing Prior art date 1967-06-09 Legal status (The legal status is an assumption and is not a legal conclusion.