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US 6,550,631 B2Granted
Drinking flask
AssigneeVogue International Limited
InventorChristopher Mark Francis Thompson
Life of this patent
Estimating the term…
Abstract
A drinking vessel comprises a body part (10) to receive a drinks liquid, a lid (30) to seal the top of the body part, a liquid outlet passage (50, 52) extending down to a lower region of the interior space of the body part, and an air intake passage (54) also extending down to the lower region of the interior space of the body part. As the user draws liquid out of the vessel through the liquid outlet passage (50, 52), replacement air enters through the air intake passage (54) and then bubbles upwardly through the liquid within the vessel.
Claims16
A drinking vessel, comprising:
- a) a body part having an open top and a bottom remote from said open top, said body part having an interior space providing a vessel for receiving a liquid for drinking;
- b) a lid sealed and fitted to said body part for closing said open top in a sealed manner;
- c) a liquid outlet passage extending downwardly and opening into said interior space only adjacent said bottom of said body part;
- and,
- d) an air intake passage extending downwardly and opening into said interior space only adjacent said bottom of said body part so that, as a user applies suction through said liquid outlet passage for drawing liquid from adjacent said bottom of said body part and thereby creating a partial vacuum within said drinking vessel owing to an air-tight seal created by said sealing of said lid onto said body part, replacement air enters said bottom of said body part through said air intake passage and then bubbles upwardly through the liquid within said drinking vessel.
2 more elements
Dependencies are inferred from the claim text.