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Liquid dosing device

  • US 4,811,871 A
  • Filed: 12/11/1987
  • Issued: 03/14/1989
  • Est. Priority Date: 12/17/1986
  • Status: Expired due to Term
First Claim
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1. 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.

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