PERISTALTIC PUMP Russian patent published in 1996 - IPC

FIELD: transportation of viscous, nonhomogeneous liquids including mortars and concrete which are not set. SUBSTANCE: pump is provided with planetary gear mechanism with displacing rollers freely rotating on cranks; centers of rollers move trajectory close to regular polygon with rounded-off vertices. Linear flexible working member (hose) is located on bearing surface in parallel with one sides of polygon. Mounted on inlet portion of working member at polygon vertex is at least one hold-down member clamping the working member when displacing roller acts on it before start of working stroke. Number of displacing rollers is no less than number of polygon sides. EFFECT: enhanced reliability. 3 dwg