Water pipe with accurate fit for a capsule

1. A water pipe with a housing, into which a receptacle that is to be filled with a liquid medium and is provided with at least one suction connection, and a heating chamber communicating therewith, are integrated, said heating chamber having a receiving portion for a capsule which holds a smoking medium, said receiving portion at the same time being a heating element for the capsule, characterized by an accurate fit between the receiving portion and the capsule whereby the receiving portion tightly surrounds the capsule, wherein the capsule comprises a collar plate with perforations and an annular groove, and wherein the heating chamber is closable by a cover plate, the cover plate having on an inner face thereof an annular bead that corresponds to the collar plate of the capsule when inserted in the receiving portion in use.

2. The water pipe according to claim 1 , characterized by a wall of the receiving portion surrounding the sides of the capsule in order to provide the accurate fit between the capsule and the receiving portion.

3. The water pipe according to claim 2 , characterized in that the wall of the receiving portion tapers conically in the direction of the interior of the heating chamber at an angle (α) of 5°-10°.

4. The water pipe according to claim 1 , characterized in that the diameter of the receiving portion between the front and rear of the receiving portion or the capsule, respectively, increases by a factor of approximately 1.1 to 1.25, preferably approx. 1.17.

5. The water pipe according to claim 1 , characterized in that the receiving portion comprises on its inner side a front wall which has an opening and extends transverse to the longitudinal axis of the housing.

6. The water pipe according to claim 1 , characterized in that the receiving portion has on its outer side a cover ring which extends transverse to the longitudinal axis of the housing.

7. The water pipe according to claim 6 , characterized in that the cover ring serves as an end stop for a collar on the capsule side when the capsule is inserted into the heating chamber.

8. The water pipe according to claim 6 , characterized in that the cover ring is connected to a collar provided on the outer side of the receiving portion or is formed integrally with said collar.

9. The water pipe according to claim 1 , characterized in that the annular bead is equipped with latching means.

10. The water pipe according to claim 9 , characterized in that the latching means are arranged adjustably in the radial direction.

11. The water pipe according to claim 1 , characterized in that the plate comprises in its outer face a handle for actuation of the cover plate.

12. The water pipe according to claim 1 , wherein the collar plate of the capsule is arranged opposite the annular bead so that the annular bead automatically presses the capsule into the receiving portion when the plate is closed.

13. The water pipe according to claim 1 , wherein the receiving portion has a front wall arranged to define a clearance between the front wall and an opposing front wall of the capsule when the capsule is fully inserted in the receiving portion to provide the accurate fit.

14. A capsule holding a smoking medium for use in a water pipe, the capsule having a collar plate, an outlet and a conical wall extending between the collar plate and outlet, the collar and conical wall arranged to fit with a receiving portion of a water pipe in use so that the receiving portion provides a heating element for the capsule, wherein the collar plate has perforations and an annular groove.

15. The capsule according to claim 14 , where the annular groove of the collar plate surrounds the perforations.

16. The capsule according to claim 14 , wherein the annular groove is arranged to receive an annular bead on an inner face of a cover plate of the water pipe.

17. The capsule according to claim 14 , wherein the capsule comprises a collar portion and the annular groove of the collar plate is between the perforations and the collar portion.