Device for preparing a beverage

Abstract

The invention relates to a device for preparing a beverage, comprising: —a water reservoir ( 1 ); —a chamber ( 5 ) that is connected to said reservoir for delivering water; —means ( 17 ) for filling said chamber with water; —means ( 16 ) for emptying water from the chamber; —a compressed gas reservoir ( 2 ) with a three-way valve ( 4 ) for displacing said means so as to empty the chamber; and —a conduit ( 14 ) for conveying the water from the chamber to an extraction head.

1 . A device for preparing a beverage, comprising:
 a water reservoir;   a chamber connected to the reservoir for delivering water;   means for filling the chamber with water comprising a spring that relaxes in order to retract a piston that causes a valve to move from a first to a second position;   means for emptying water from the chamber;   a reservoir comprising a valve for emptying water so as to empty the chamber; and   a conduit conveying the water from the chamber to above an extraction head.   
   
   
       2 . The device as claimed in  claim 1 , wherein the chamber has a volume of between 10 and 1000 cc. 
   
   
       3 . The device as claimed in  claim 1 , wherein the means for emptying water from the chamber comprises means using the pressure of a gas in order to empty the chamber. 
   
   
       4 . The device as claimed in  claim 1 , wherein the means for filling the chamber with water comprise gravitation means. 
   
   
       5 . The device as claimed in  claim 3 , wherein the gas is chosen from the group consisting of air, CO 2  and nitrogen monoxide. 
   
   
       6 . The device as claimed in  claim 1 , wherein the extraction head is a head for pre-measured filter-paper capsules. 
   
   
       7 . The device as claimed in  claim 1 , wherein the water reservoir is a thermally-insulated hot-water reservoir. 
   
   
       8 . The device as claimed in  claim 1 , comprising a heating system surrounding the chamber. 
   
   
       9 . The device as claimed in  claim 1 , comprising a heating system between the chamber and the extraction head. 
   
   
       10 . The device as claimed in  claim 1 , wherein the chamber has a substantially cylindrical shape. 
   
   
       11 . The device as claimed in  claim 1 , wherein the chamber has a volume of between 50 and 150 cc. 
   
   
       12 . The device as claimed in  claim 1 , wherein the means for filling said chamber with water are mechanical means. 
   
   
       13 . The device as claimed in  claim 1 , wherein the extraction head is a head for sealed capsules. 
   
   
       14 . A device for preparing a beverage, comprising:
 a water reservoir;   a chamber coupled to the reservoir;   a spring and piston that are so constructed and arranged so that as the spring relaxes the piston causes a valve to move from a first to a second position;   a compressed-gas reservoir having a valve for emptying the chamber of water; and   a conduit conveying the water from the chamber to above an extraction head.   
   
   
       15 . The device as claimed in  claim 14 , wherein the chamber has a volume of between 10 and 1000 cc. 
   
   
       16 . The device as claimed in  claim 14 , wherein the water is emptied from the chamber using the pressure of the gas. 
   
   
       17 . The device as claimed in  claim 14 , wherein the chamber is filled with water by gravitation means. 
   
   
       18 . The device as claimed in  claim 16 , wherein the gas is chosen from the group consisting of air, CO 2  and nitrogen monoxide. 
   
   
       19 . The device as claimed in  claim 14 , wherein the extraction head is a head for pre-measured filter-paper capsules or sealed capsules. 
   
   
       20 . The device as claimed in  claim 14 , wherein the water reservoir is a thermally-insulated hot-water reservoir. 
   
   
       21 . The device as claimed in  claim 14 , comprising a heating system surrounding the chamber. 
   
   
       22 . The device as claimed in  claim 14 , comprising a heating system between the chamber and the extraction head. 
   
   
       23 . The device as claimed in  claim 14 , wherein the chamber has a substantially cylindrical shape.