Abstract

The invention relates to a pump (10) for circulating a fluid, comprising an inlet chamber (12), first (14) and second (16) fluid inlet openings being formed in the inlet chamber (12); a delivery chamber (18), a fluid outlet opening (20) being formed in the delivery chamber (18); the pump also comprising: a drive member for driving the fluid from one of the first (14) and second (16) fluid inlet openings towards the fluid outlet opening (20); an obstruction member (24) which can be actuated in order selectively to obstruct the first (14) or second (16) fluid inlet opening; and an actuating member (26) configured to be moved by the fluid circulating in the pump, the actuating member (26) being secured to the obstruction member (24) so that the movement of the actuating member actuates the obstruction member (24).

IPC Classes  ?

• F04D 29/42 - CasingsConnections for working fluid for radial or helico-centrifugal pumps
• F04D 15/00 - Control, e.g. regulation, of pumps, pumping installations, or systems
• F04D 29/48 - Fluid-guiding means, e.g. diffusers adjustable for unidirectional fluid flow in reversible pumps
• F16K 31/12 - Operating meansReleasing devices actuated by fluid
• F16K 11/00 - Multiple-way valves, e.g. mixing valvesPipe fittings incorporating such valvesArrangement of valves and flow lines specially adapted for mixing fluid
• F24D 3/10 - Feed-line arrangements, e.g. providing for heat-accumulator tanks, expansion tanks
• F24D 19/10 - Arrangement or mounting of control or safety devices