Liquid dosage dispensers
First Claim
1. A liquid dosage dispenser comprising a bottle for containing a liquid, said bottle having an open neck, a dispenser apparatus supported on said neck having a housing extending into said bottle and a plunger device extending into said housing for longitudinal movement therein, said housing having an opening through which liquid in said bottle can be drawn into said housing, said housing having a helical channel and at least one vertical channel on an inner surface thereof, said at least one vertical channel being positioned to correspond to a preselected amount of liquid to be drawn into said housing, said plunger device including a through passageway for permitting the flow of liquid in said plunger device and a follower for engaging said helical channel, said plunger device being rotatable with respect to said housing to permit said follower to ride in said helical channel to move said plunger device longitudinally along said housing to draw a preselected amount of liquid through said opening into said housing, said plunger device being movable in a reverse longitudinal direction when said follower is positioned in said at least one vertical channel to expel liquid in the housing through said passageway and out of said dispenser apparatus.
1 Assignment
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Accused Products
Abstract
A liquid dosage dispenser includes a bottle and a dispenser apparatus supported on the bottle having a housing or sleeve extending into the bottle and a plunger device having a through passageway extending into the housing for longitudinal movement therein. The housing includes an opening through which liquid in the bottle can be drawn into the housing. A helical channel and one or more vertical channels are provided in the housing. The plunger device is rotatable within the housing to permit a follower extending from the plunger device to ride in the helical channel to move the plunger longitudinally in the housing. As the plunger moves upwardly within the housing, a preselected amount of liquid is drawn into the housing. When the follower is positioned in a vertical channel associated with a desired dosage level, the plunger may be forced downwardly to deliver the desired dosage through the passageway and out of the dispenser. Indents are provided along the helical channel at various vertical channel positions. When the follower encounters an indent, it snaps into the indent to indicate that a preselected dosage of liquid is available to be dispensed.
27 Citations
20 Claims
- 1. A liquid dosage dispenser comprising a bottle for containing a liquid, said bottle having an open neck, a dispenser apparatus supported on said neck having a housing extending into said bottle and a plunger device extending into said housing for longitudinal movement therein, said housing having an opening through which liquid in said bottle can be drawn into said housing, said housing having a helical channel and at least one vertical channel on an inner surface thereof, said at least one vertical channel being positioned to correspond to a preselected amount of liquid to be drawn into said housing, said plunger device including a through passageway for permitting the flow of liquid in said plunger device and a follower for engaging said helical channel, said plunger device being rotatable with respect to said housing to permit said follower to ride in said helical channel to move said plunger device longitudinally along said housing to draw a preselected amount of liquid through said opening into said housing, said plunger device being movable in a reverse longitudinal direction when said follower is positioned in said at least one vertical channel to expel liquid in the housing through said passageway and out of said dispenser apparatus.
- 11. A liquid dosage dispenser comprising a bottle for containing a liquid, said bottle having an open neck, a cap rotatably supported on said neck, a dispenser apparatus supported on said neck, said dispenser apparatus having a sleeve extending into said bottle and a plunger device extending into said sleeve for longitudinal movement therein, said sleeve having an opening through which liquid in said bottle can be drawn into said sleeve, said sleeve having a helical channel and at least one vertical channel on an inner surface thereof, said at least one vertical channel being positioned to correspond to a preselected amount of liquid to be drawn into said sleeve, said plunger device including a through passageway for permitting the flow of liquid in said plunger device and a follower for engaging said helical channel, said cap and said plunger device adapted to translate rotational movement of said cap to said plunger device with respect to said sleeve to permit said follower to ride in said helical channel to move said plunger device longitudinally along said sleeve to draw a preselected amount of liquid through said opening into said sleeve, said plunger device being movable in a reverse longitudinal direction when said follower is positioned in said at least one vertical channel to expel liquid in the sleeve through said passageway and out of said dispenser apparatus.
Specification