Importance

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Abstract

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.

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First Claim