us2669396a - hammer mill screen changing mechanism

US2669396A US51433A US5143348A US2669396A US 2669396 A US2669396 A US 2669396A US 51433 A US51433 A US 51433A US 5143348 A US5143348 A US 5143348A US 2669396 A US2669396 A US 2669396A Authority US United States Prior art keywords screen mill housing screens motor Prior art date 1948-09-27 Legal status (The legal status is an assumption and is not a legal conclusion