Squeeze dispenser

Details Squeeze dispenser Squeeze dispenser

1999-06-04

2001-12-18

Shaver, Kevin (Department: 3754)

Dispensing

Nongravity feed to trap of vacuum, gravity, or manual...

C222S207000, C222S158000, C222S211000, C222S438000, C222S023000

Reexamination Certificate

active

06330960

ABSTRACT:

FIELD OF THE INVENTION
The present invention relates to a dispenser for liquids, more specifically a dispenser particularly well suited for dispensing liquids which contain pharmaceutically active ingredients.
BACKGROUND OF THE INVENTION
Containers with a reservoir in which a measured dose of liquid are filled are known in the art. Typically these containers have an upper reservoir into which the liquid is filled, and which contains markings to indicate the level of fluid to be dispensed, see for example U.S. Design Pat. Nos. 278,118 and 316,815. However, these containers are not designed for delivering variable accurate dosages. While this might be acceptable for products such as mouthwash, these containers are not well suited for dispensing pharmaceutical ingredients.
Despite the disclosures of the prior art there is an ongoing need to provide dispensers which deliver accurate dosages of liquids easily while also provides child resistant features.
SUMMARY OF THE INVENTION
The present invention provides in a first embodiment a container for dispensing liquids, said container comprising: a lower reservoir and an upper reservoir separated by a gasket having an aperture therethrough; a longitudinal tube extending through said gasket, said tube having a lower end extending into said lower reservoir, an upper end extending into said upper reservoir, whereby when pressure is applied to said lower reservoir, liquid in said lower reservoir can travel through said tube and into said upper reservoir, said upper end of said tube having a longitudinal slot extending therethrough; and a dispensing tip having a longitudinal sleeve extending therefrom, said longitudinal sleeve having a helical aperture extending therethrough, said sleeve is disposed concentrically around said upper end of said tube such that it can rotate around said tube, whereby the maximum amount of liquid that can be maintained in said upper reservoir is controlled by said helical slit's position with respect to said longitudinal slot.
In a second embodiment the present invention provides a container for dispensing liquids, said container comprising a lower reservoir and an upper reservoir in fluid communication with each other and separated by a gasket having an aperture therethrough; a longitudinal tube extending through said gasket, said tube having a lower end extending into said lower reservoir, an upper end extending into said upper reservoir, whereby when pressure is applied to said lower reservoir, liquid in said lower reservoir can travel through said tube and into said upper reservoir, said upper end of said tube having a slot extending therethrough; a dispensing tip having a longitudinal sleeve extending therefrom, said longitudinal sleeve having a slot extending therethrough, said sleeve is disposed concentrically around said upper end of said tube such that said tube and sleeve can move relative to each other, whereby the maximum amount of liquid that can be maintained in said upper reservoir is controlled by changing the position of said slots relative to each other.
Another embodiment of the invention provides a container for dispensing liquids, said container comprising: a lower reservoir and an upper reservoir in fluid communication with each other; a means for delivering liquid from said lower reservoir to said upper reservoir upon the application of pressure to said lower reservoir; and a means for dosing and varying the maximum amount of liquid that can be maintained in said upper reservoir.
Yet another embodiment provides a container for dispensing liquids, said container comprising a lower reservoir and an upper reservoir in fluid communication with each other; a device that delivers liquid from said lower reservoir to said upper reservoir upon the application of pressure to said lower reservoir; and a dosing device that can and vary the maximum amount of liquid that can be maintained in said upper reservoir.
These embodiments as well as other features of the present invention will be understood upon reading the specification and accompanying drawings.


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