Device for administering a fluid product

Abstract

An administering device for a fluid product includes a product receptacle that accommodates the product to be administered, a fluid reservoir for a driving fluid, a driving means, a product chamber, and a fluid connection. The product receptacle includes an opening at a forward end and a product stopper at a rear end. The driving means acts upon the fluid reservoir, the pressure chamber adjoins the product stopper while the fluid connection is located between the fluid reservoir and the pressure chamber, and the driving means acts upon the fluid reservoir in such a way that the pressure chamber is impinged upon by pressure which affects the product stopper and the product is discharged from the product receptacle.

1 . A device for administering a fluid product, comprising:
 a product container configured to accommodate the fluid product to be administered, said product container comprising an opening at a front end and a product stopper movable relative to the product container at a rear end;   a fluid reservoir for accommodating a drive fluid;   a drive means operatively coupled to the fluid reservoir;   a pressure chamber operatively coupled to the product stopper; and   a fluid connection between the fluid reservoir and the pressure chamber;   wherein the drive means acts on the fluid reservoir in such a way that the pressure chamber is charged with pressure which acts on the product stopper, and the product is discharged from the product container.   
     
     
         2 . The administering device according to  claim 1 , wherein the drive means is biased and/or held in a biased position. 
     
     
         3 . The administering device according to  claim 1 , further comprising a connecting means for forming the fluid connection, said connecting means comprising first state and a second state, wherein the fluid connection is closed in the first state, and a the fluid connection is opened in the second state such that the fluid connection is open to the drive fluid. 
     
     
         4 . The administering device according to  claim 3 , wherein the product container or the connecting means triggers the drive means. 
     
     
         5 . The administering device according to  claim 3 , wherein when the product container is inserted into the casing, the connecting means is activated in such a way that the fluid connection is moved to the second, open state. 
     
     
         6 . The administering device according to  claim 3 , wherein the connecting means forms a part of the fluid connection. 
     
     
         7 . The administering device according to  claim 3 , wherein when the product container is inserted into the casing, the connecting means is activated by the product stopper. 
     
     
         8 . The administering device according to  claim 7 , wherein the connecting means advances the product stopper by a distance that allows the product container to be vented. 
     
     
         9 . The administering device according to  claim 3 , wherein the connecting means forms a flow section of the fluid connection which exhibits a maximum flow resistance in the fluid connection. 
     
     
         10 . The administering device according to  claim 3 , wherein connecting means forms the fluid connection. 
     
     
         11 . The administering device according to  claim 3 , wherein the connecting means comprises a tube-like hollow element with which a sealing membrane for sealing the fluid connection can be pierced. 
     
     
         12 . The administering device according to  claim 3 , wherein the pressure chamber is formed by one or more walls of the product container and the product stopper together with the connecting means. 
     
     
         13 . The administering device according to  claim 1 , wherein the fluid connection to the pressure chamber comprises a dimension, said dimension of the fluid connection defining the pressure in the pressure chamber. 
     
     
         14 . The administering device according to  claim 1 , further comprising a casing, said casing configured as the pressure chamber, fluid connection, product container and fluid reservoir, and wherein the casing is configured to accommodate the drive means. 
     
     
         15 . The administering device according to  claim 1 , further comprising a casing, said casing accommodating the drive means and each of the pressure chamber, the fluid connection, the product container and the fluid reservoir. 
     
     
         16 . The administering device according to  claim 15 , further comprising:
 a sealing means, which seals the fluid connection; and   a connecting means, which is accommodated in the casing in such a way that it can be moved from an initial position towards an activating position;   wherein the connecting means is arranged such that the product stopper can be coupled to the connecting means by inserting the product container, in order to move the connecting means to the activating position; and   wherein the sealing means and the connecting means are arranged such that the connecting means is brought to bear on the sealing means by the movement into the activating position, in order to open the fluid connection.   
     
     
         17 . The administering device according to  claim 16 , wherein the connecting means comprises a bearing structure which is guided movably in the casing and a hollow element, preferably an elongated hollow element, which protrudes from the bearing structure and forms a section of the fluid connection in the activating position. 
     
     
         18 . The administering device according to  claim 15 , wherein:
 the casing forms a compartment comprising an opening; and   the product container can be inserted into the compartment through the opening, preferably in the proximal direction;   wherein inserting the product container opens the fluid connection which is sealed before the product container is inserted.   
     
     
         19 . The administering device according to  claim 15 , further comprising:
 a compartment formed by the casing, said compartment comprising an opening through which the product container can be inserted into the compartment; and   a sealing element arranged in the compartment, said sealing arrangement configured to abut with the product container when it is inserted;   wherein the sealing element seals off a proximal end section of the inserted product container from the compartment.   
     
     
         20 . The administering device according to  claim 15 , wherein the pressure chamber is formed by one or more walls of the product container and the product stopper together with the casing. 
     
     
         21 . The administering device according to  claim 1 , wherein the drive means is a spring element. 
     
     
         22 . The administering device according to  claim 1 , wherein the fluid connection is formed by a capillary having a diameter of 0.5 to 3 mm. 
     
     
         23 . The administering device according to  claim 1 , wherein the fluid connection is formed in a meandering or looped shape. 
     
     
         24 . A method for continuously administering a fluid product, using an administering device, the method comprising the steps of:
 providing an administering device comprising:
 a product container configured to accommodate the fluid product to be administered, said product container comprising an opening at a front end and a product stopper movable relative to the product container at a rear end; 
 a fluid reservoir for accommodating a drive fluid; 
 a drive means operatively coupled to the fluid reservoir; 
 a pressure chamber operatively coupled to the product stopper; and 
 a fluid connection between the fluid reservoir and the pressure chamber; and 
   actuating the administering device, wherein, when the administering device is actuated, the drive means acts on the fluid reservoir in such a way that the pressure chamber is charged with pressure which acts on the product stopper, and the product is discharged from the product container.