초록 ▼

A two-compartment dispenser of fluent material includes a primary compartment having a collapsible wall and initially holding the main body of the material, a secondary compartment, and a compartment separator that forms a barrier between the two compartments and has a passage for the fluent materia

A two-compartment dispenser of fluent material includes a primary compartment having a collapsible wall and initially holding the main body of the material, a secondary compartment, and a compartment separator that forms a barrier between the two compartments and has a passage for the fluent material to flow from the primary to the secondary compartment. A dispensing nozzle as connected to the secondary compartment, which also has a movable wall portion resiliently biased to expand the volume of the secondary compartment to its fullest extent. A check valve controls the passage through the compartment separator and is closed when the movable part of the secondary compartment is pressed inwardly to force fluent material from the secondary compartment out through the dispensing nozzle. Release of pressure on the movable part reduces pressure in the secondary compartment and allows the check valve to open so that fluent material can flow from the primary compartment to the secondary compartment. Ambient air pressure on the collapsible wall reduces the volume of the primary compartment an amount equal to the volume of material transferred to the secondary compartment. A rigid outer casing vented to the atmosphere protects the collapsible primary compartment from being inadvertently squeezed.

대표청구항 ▼

A dispenser for fluent material, said dispenser comprising: a collapsible container having a flexible wall impervious to air and enclosing a primary compartment to hold the fluent material, the wall having an opening therethrough; a vented outer case enclosing the collapsible container within a spac

A dispenser for fluent material, said dispenser comprising: a collapsible container having a flexible wall impervious to air and enclosing a primary compartment to hold the fluent material, the wall having an opening therethrough; a vented outer case enclosing the collapsible container within a space open to the surrounding environment; a compartment separator in sealing contact with the perimeter of the opening and mechanically connected to the vented case; a cover of fluid-tight material extending over at least a part of the compartment separator means and the perimeter of said cover sealed fluid-tight thereto and defining therewith a secondary compartment between the cover and the compartment separator, including a disk which is movable inwardly toward the secondary compartment and outwardly away from the secondary compartment; resilient means biasing the movable part of the cover away from the compartment separator; a passage through the compartment separator to allow the fluent material to pass therethrough from the primary compartment to the secondary compartment; a nozzle communicating with the secondary compartment to allow the fluent material to emerge from the secondary compartment through the nozzle in response to inward movement of the movable part; valve means mounted on said disk responsive to inward movement of the cover to close the passage to prevent the fluent material from passing from the secondary compartment back into the primary compartment in response to inward movement of the movable part, comprising a piston aligned with the passage to seal the passage when the movable part of the cover is pressed toward the compartment separator, the normal position of the movable part of the cover holding the piston resiliently spaced from the compartment separator means; a channel for the fluent material through the piston, the movable part of the cover encircling the piston at a region of the piston remote from the compartment separator, the channel having an entrance to the secondary compartment adjacent the part of the piston encircled by the movable part of the cover, whereby a substantial part of the piston can enter and seal the passage through the compartment separator without blocking the entrance to the channel; and an actuator comprising a hollow tube connected to the nozzle to allow the fluent material to pass through the hollow tube to the nozzle, said hollow tube extending through said disk to communicate with the secondary compartment and being rotatably coupled to said disk to rotate with respect thereto, said hollow tube comprising an aperture alignable with the channel to open and close the channel selectively according to the rotational position of the hollow tube with respect to the disk.