Dispenser for fluids

Patent metadata

Field	Value
Publication number	US-2016332180-A1
Application number	US-201415111633-A
Country	US
Kind code	A1
Filing date	Nov 27, 2014
Priority date	Jan 17, 2014
Publication date	Nov 17, 2016
Grant date	—

Abstract

Fluid dispenser for the discharge of pharmaceutical or cosmetic fluids including a fluid reservoir in which fluid is stored prior to discharge, an outlet channel through which the fluid is dispensed to an environment, and a pump chamber which, starting from an initial state with maximum pump chamber volume, is volumetrically reduced by a manual pump activation. An inlet valve arrangement is provided between the fluid reservoir and the pump chamber, which opens in a pressure regulated manner when a negative pressure exists in the pump chamber with respect to the fluid reservoir, and an outlet valve arrangement is provided between the pump chamber and the discharge opening. The outlet valve arrangement includes a switching valve mechanically compelled to open in reaction to a displacement of an activation handle and independent of the fluid pressure in the pump chamber.

First claim

1 . A liquids dispenser for discharging pharmaceutical or cosmetic liquids, or liquids of the foodstuff sector, having
a liquids reservoir in which the liquid is stored prior to discharging; an outlet duct through which the liquid may be dispensed to an environment; a pump chamber which, proceeding from an initial state having the maximum pump chamber capacity, is volumetrically reducible by manual actuation of the pump by means of an actuation handle; wherein an inlet valve assembly is provided between the liquids reservoir and the pump chamber, which inlet valve assembly is opened in a pressure-controlled manner when there is negative pressure in the pump chamber in relation to the liquids reservoir; and an outlet valve assembly is provided between the pump chamber and the discharge opening, wherein the outlet valve assembly comprises a switch valve which, independently of the liquid pressure in the pump chamber, as a reaction to the actuation handle being displaced is forcibly opened in a mechanical manner.

2 . The liquids dispenser as claimed in claim 1 , wherein the outlet valve assembly is configured in such a manner that the latter in the case of the actuation handle not being actuated prevents opening in relation to the outlet duct at least up to a positive pressure in the pump chamber of 700 mbar, preferably 1500 mbar.

3 . The liquids dispenser as claimed in claim 2 , wherein the switch valve has a first sealing face which is forcibly coupled to the actuation handle or is provided thereon, and a second sealing face which is movable in relation to the first sealing face and in the closed state of the outlet valve assembly bears on the first sealing face, wherein by displacing the actuation handle the second sealing face is traversed onto an opening region which is contiguous to the first sealing face and which is configured such that said opening region prevents the second sealing face bearing thereon in a tight manner.

4 . The liquids dispenser as claimed in claim 3 , wherein the component on which the first sealing face is provided, and the component on which the second sealing face is provided, are interconnected by a sprung element which is tensioned when the second sealing face is transferred into the opening region.

5 . The liquids dispenser as claimed in claim 1 , wherein the outlet valve assembly has a pressure relief valve which is opened in a pressure-controlled manner when there is positive pressure in the pump chamber in relation to the outlet duct.

6 . The liquids dispenser as claimed in claim 5 , wherein in that at least the second sealing face of the switch valve and at least one sealing face of the pressure relief valve are integrally configured.

7 . The liquids dispenser as claimed in claim 1 , wherein the pump chamber has a flexible wall which enables volumetric variability of the pump chamber, wherein preferably the second sealing face of the switch valve and/or a sealing face of the pressure relief valve are/is integrally connected to this wall.

8 . The liquids dispenser as claimed in claim 7 , wherein the pump chamber wall is configured so as to be closed in an encircling manner and has at one first end a substantially cylindrical first portion of an external diameter which is smaller than the internal diameter of a substantially cylindrical second portion at an opposite second end; and the pump chamber wall in the actuated state of the actuation handle is deformed in such a manner that the first portion is surrounded by the second portion.

9 . The liquids dispenser as claimed in claim 1 , wherein the actuation handle is operationally coupled to the pump chamber and to the switch valve in such a manner that in the case of the actuation handle being actuated, the switch valve is initially opened and the pump chamber is subsequently reduced in size.

10 . The liquids dispenser as claimed in claim 9 , wherein an opening portion which is displaceable by the actuation handle and has two active faces is provided, wherein a first active face of the two active faces is provided for impinging a first counter face on a valve body or on a valve flap with a force; wherein a second active face of the two active faces is provided for impinging a second counter face with a force, wherein the pump chamber is reducible in size by impinging the second counter face with a force; and in an initial state of the liquids dispenser, in which the actuation handle is not actuated, the spacing between the first active face and the first counter face is smaller than the spacing between the second active face and the second counter face.

11 . The liquids dispenser as claimed in claim 1 , wherein in that the pump chamber at least in portions is delimited by an elastically deformable wall, wherein in the closed state of the switch valve mutually bearing sealing faces of the switch valve are provided on or fastened to this wall in such a manner that by deformation of the wall as a consequence of the actuation handle being displaced the sealing faces are mutually spaced apart such that the switch valve is opened.

12 . The liquids dispenser as claimed in claim 11 , wherein the pump chamber has in the region of the elastically deformable wall a shape which is formed by the deformable wall and which tapers off in the direction of the switch valve, in particular has a bell shape.

13 . The liquids dispenser as claimed in claim 1 , wherein the liquids dispenser is configured as a collapsible liquids dispenser, in particular as a tube.

Assignees

• Aptar Radolfzell Gmbh

Inventors

• Bruder Thomas
• Baumann Tobias

Classifications

• B05B11/1053

  combined with means, other than pressure, for automatically opening a valve during actuation; combined with means for automatically removing closures or covers from the discharge nozzle during actuation · CPC title

• B05B11/1035 Primary

  the pumping chamber being a bellow · CPC title

• B05B11/1028

  Pumps having a pumping chamber with a deformable wall (B05B11/1087 take precedence) · CPC title

• B05B11/1033 Primary

  the deformable wall, the inlet and outlet valve elements being integrally formed, e.g. moulded · CPC title

• B05B11/1036 Primary

  the outlet valve being opened in the direction opposite to the fluid flow downstream the outlet valve by the pressure acting on a valve controlling element · CPC title