VARIABLE-CAPACITY PISTON PUMP Russian patent published in 2001 - IPC

FIELD: chemical industry. SUBSTANCE: proposed pump is designed for metered out pumping of liquids with correction of metered out amounts without interrupting the process. Pump has translational-and-rotary motion differential with locking device in form of closed hinge-coupled kinematic circuit and engaged gear wheels arranged in circuit. Radius of pump drive crank is changed by changing length of diagonal of polygon formed by kinematic circuit by means of self-braking drive connected to circuit. Interlock is used to prevent spontaneous maladjustment and provide unloading of mechanism with pump operating. Provision is made for changing delivery of pump in operation. EFFECT: enhanced reliability of operation. 3 cl, 5 dwg