| 摘要 |
<p>A manually energized dispensing system for dispensing a fluid (8) contained in a non-pressurized container (7). The dispensing system comprises a dispensing head (1) comprising a housing (2), a nozzle through which fluid to be dispensed exits, a pump (4) mounted in the housing, and a pump actuation mechanism (3), the pump comprising a rotor (13) rotatably and axially displaceable with respect to a stator (12). The pump rotor comprises first and second axial extensions (17, 18) of different diameters, mounted in corresponding chambers (15, 16) of the stator, first and second seals (19, 20) mounted in the stator housing and sealingly surrounding the first and second axial rotor extensions, the rotor extensions comprising liquid supply channels (22, 24) that, in conjunction with the sealing rings, operate as valves that open and close communication between an inlet of the pump connected to the inside of the container (7) and the pump chambers, respectively the pump chambers and an outlet of the pump connected to the dispensing head nozzle, as a function of the angular displacement of the pump rotor. The rotor is coupled mechanically to the actuation mechanism (3) and the actuation mechanism is configured to be manually operated to release or to drive the pump rotor to dispense fluid, respectively to block the pump rotor to stop dispensing fluid.</p> |
