초록 ▼

A dosing device for dispensing liquid from a container comprises an outlet passage for the liquid and an obturator, such as a flap or piston, that is adapted to be driven to block the outlet passage, once a quantity of liquid has been dispensed, under the influence of liquid flowing from the contain

A dosing device for dispensing liquid from a container comprises an outlet passage for the liquid and an obturator, such as a flap or piston, that is adapted to be driven to block the outlet passage, once a quantity of liquid has been dispensed, under the influence of liquid flowing from the container through a small aperture into a space behind the obturator in a chamber in which the obturator is movable. The outlet passage has a convoluted configuration whereby flow of liquid through it is directed at least partly back towards the obturator to exert a back-pressure thereon, the obturator being of a dimension such that it may be acted on by liquid in part of the passage in which the flow is thus directed back. The chamber may have a moveable wall portion that opens up a large aperture to allow rapid restoration of the obturator to its start position.

대표청구항 ▼

A dosing device for dispensing liquid from a container, the device comprising: (a) a front part having an outlet opening; (b) means for providing a chamber in the device rearwardly adjacent the outlet opening, the chamber having a front opening facing the outlet opening of the device; (c) an outlet

A dosing device for dispensing liquid from a container, the device comprising: (a) a front part having an outlet opening; (b) means for providing a chamber in the device rearwardly adjacent the outlet opening, the chamber having a front opening facing the outlet opening of the device; (c) an outlet passage for liquid being dispensed to flow from the container to the outlet opening around the chamber; (d) an obturator fitting in the chamber and movable therein to a forward position blocking the outlet passage; (e) means located in said means for providing a chamber for permitting only a restricted flow of liquid from the container into the chamber behind the obturator to influence the movement of the obturator towards the forward position during dispensing of liquid; and (f) a part providing a convolution of the outlet passage forwardly of the obturator, said convolution-providing part projecting from the front part rearwardly towards the obturator, and having a radially outwardly facing surface for directing a flow of liquid through the outlet passage rearwardly through the front opening of the chamber against the obturator, to exert a back pressure thereon during dispensing.