Liquid dispenser
AssigneeAptar Radolfzell GmbH
InventorStefan Ritsche
Life of this patent
Estimating the term…
Abstract
Liquid dispenser for discharging pharmaceutical liquids, having a housing, an outlet opening and an outlet valve assigned to the outlet opening. The outlet valve includes a pressure chamber arranged upstream of a valve opening and delimited to one side by a valve plate of a valve body. By increasing the pressure in the pressure chamber, the valve can be opened. The pressure chamber has a flat form and has a large surface area in contact with liquid in relation to the volume. At least one portion of the valve plate which is in contact with liquid in the pressure chamber is of a valve plate material produced using metallocenes as catalysts.
Claims17
A liquid dispenser for discharging pharmaceutical liquids, comprising:
- a housing;
- an outlet opening;
- and
- an outlet valve assigned to the outlet opening;
- wherein the outlet valve comprises:
- a valve opening and a valve pin, the valve pin closing the valve opening in a closed position of the outlet valve and releasing the valve opening in an open position of the outlet valve;
- a valve body, which has either the valve pin or the valve opening and which is displaceable at least partially with respect to the housing of the liquid dispenser in order to thereby allow for transfer of the outlet valve between the closed position and the open position;
- and
- a pressure chamber, which is arranged upstream of the valve opening and is delimited to one side by a valve plate of the valve body, the valve body being displaceable at least in portions by application of pressure at the valve plate by liquid in the pressure chamber, such that the valve pin and the valve opening are thereby displaced relative to one another;
- wherein at least one portion of the valve plate which is in contact with liquid in the pressure chamber comprises a valve plate material which is a plastic produced using metallocenes as catalysts;
- wherein the plastic is an elastic cycloolefin copolymer or a combination of an elastic cycloolefin copolymer and polypropylene;
- and
- wherein the valve body has an intrinsically deformable configuration and has a fixing region on an outside which is fixed immovably in relation to the housing for allowing the valve opening or the valve pin to be displaced with respect to the housing.
A liquid dispenser for discharging pharmaceutical liquids, comprising:
- a housing;
- an outlet opening;
- and
- an outlet valve assigned to the outlet opening, the outlet valve having a closed position to prevent fluid flow therethrough and an open position to allow fluid flow therethrough;
- wherein the outlet valve comprises:
- a valve opening and a valve pin, the valve pin closing the valve opening in the closed position and releasing the valve opening in the open position;
- a valve body, which has either the valve pin or the valve opening and which is displaceable at least partially with respect to the housing of the liquid dispenser to thereby allow for transfer of the outlet valve between the closed position and the open position;
- and
- a pressure chamber arranged upstream of the valve opening and delimited to one side by a valve plate of the valve body, the valve body being displaceable at least in portions by application of pressure at the valve plate by liquid in the pressure chamber, such that the valve pin and the valve opening are thereby displaced relative to one another;
- wherein at least one portion of the valve plate which is in contact with liquid in the pressure chamber comprises an elastic cycloolefin copolymer or a combination of an elastic cycloolefin copolymer and polypropylene;
- and
- wherein the valve body includes a deformable portion and a fixing region which is fixed immovably in relation to the housing for allowing the valve opening or the valve pin to be displaced with respect to the housing.
Dependencies are inferred from the claim text.