Liquid dispenser with plunger
OwnerShinya Fujimotoinventor
Life of this patent
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Abstract
A dispenser includes: a plunger; a dispensing portion configured to dispense and suction liquid in response to an advance and a retraction of a distal end surface of the plunger along an axial line. The dispensing portion includes: a surrounding portion surrounding the distal end surface of the plunger about the axial line to define an accommodation chamber for accommodate the liquid to be dispensed; and an end portion facing the distal end surface of the plunger. The surrounding portion includes an inlet opening into the accommodation chamber to receive the liquid into the accommodation chamber. A distance from the inlet to the end portion is less than or equal to half of a maximum stroke of the distal end surface of the plunger.
Claims20
A dispenser comprising:
- a plunger comprising a distal end surface facing an advance direction of the plunger and a proximal end surface facing a retraction direction of the plunger;
- a dispensing portion configured to dispense and suction liquid in response to an advance and a retraction of the distal end surface along an axial line intersecting the distal end surface and the proximal end surface;
- wherein the dispensing portion comprises:
- a surrounding portion surrounding the distal end surface of the plunger about the axial line to define an accommodation chamber;
- and
- an end portion facing the distal end surface of the plunger along the axial line, wherein the end portion comprises an outlet opening into the accommodation chamber to dispense the liquid out of the accommodation chamber,
- wherein the surrounding portion comprises an inlet opening into the accommodation chamber to receive the liquid into the accommodation chamber, and
- wherein a distance from the inlet to the end portion is less than or equal to half of a maximum stroke of the distal end surface of the plunger.
Dependencies are inferred from the claim text.