METHOD FOR PERISTALTIC MOVEMENT OF PROCESSING MEDIUMS AND PERISTALTIC PUMP Russian patent published in 1994 - IPC

FIELD: pumps. SUBSTANCE: pump has casing 1 with annular groove 2 at the outlet and throttling orifice 3 with cock 4 at the outlet. Moreover, the pump has working member 5 in the form of a flexible hose which forms with casing 1 and groove 2 closed variable-volume chamber 6. Power- transfer agent feed system 7 is connected to groove 2 through controllable check valve 8 connected to a time relay. EFFECT: improved structure. 4 cl, 3 dwg