| 摘要 |
Adjustable riser pipe to be used for instance in a coffee maker with two containers sealingly arranged relative to and above one another, said two containers being flow-connected through the adjustable riser pipe in such a manner that liquid water can be caused to leave the closed lower container and enter the upper container through said riser pipe by means of pressure resulting from a heating until the rising of liquid water is stopped because the water level reaches a limit level defined by a level set by the lower edge of the riser pipe. The Adjustable riser pipe ( 7 ) according to the invention is formed by a main pipe ( 2 ) and by a sleeve ( 6 ) being substantially sealingly and axially and axially and/or circumferentially displaceable about said main pipe. The main pipe ( 2 ) fixedly and tightly abuts a structure ( 4 ) in the upper container ( 1 ) at an unchangeable distance from said upper container and in a direction towards the lower edge ( 5 ) of the main pipe. The adjustable length of the riser pipe ( 7 ) and consequently the set limit for the rising liquid water from the lower container during the brewing procedure are defined by the instantaneous maximum level of the lower edge ( 8 ) of the sleeve ( 6 ). The advantages are an easy setting by one hand and a high tolerance towards lime deposits. |
