209373
Priority Date(s): ra-?\.-a3
Complete Specification Filedr'^-iQ.T.^Jr
Class: . J.OA if....
Publication Date:
P.0. Journsli No: *"3■ m ;NEW ZEALAND PATENTS ACT, 2953 ;No.: ;Date: ;COMPLETE SPECIFICATION A SANITARY FITTING ;I /We, HANSA METALLWERKE AG, Sigmaringer Str. 107, D - 7000 Stuttgart 81, Federal Republic of Germany, a~ ;iJj, /^jdrwv^. ;hereby declare the invention for whichXK/ we pray that a patent ma.y be granted to Jttftc/us, and the method by -which it is to be performed, to be particularly described in and by the following statement; - ;j (followed by page la) ;-1Wt5 ;-la- ;2 093T33 ;Specification ;The invention relates, to a sanitary fitting, and in particular a single-lever mixer, witti a fitting housing in the form of a casting in one piece? with an outlet; with at least one water inlet pipe secured to the fitting housing; with a regulation cartridge which is mounted on an upward-facing connection surface of the fitting housing, which is connected for the passage of water on one hand to the connection surface and on the other hand to the outlet; with seals between the regulation cartridge and the connection surface which ensure the passage of water from the water-circulation channel into the regulation cartridge and from the regulation cartridge into the cavity. ;In known sanitary fittings of this type the cavity is annular and surrounds an area of metal of the fitting housing which remains in the form of an island and through which two bore holes pass. The water inlet pipes are soldered in these bore holes which form at least in part the inflow path of -the water to the regulation cartridge. The design of the cavity in the form of a ring, however, makes it necessary, during the casting operation of manufacturing the fitting housing, to use a core of complicated form, or even two cores. ;•The problem on which the present invention is based is that of designing a sanitary fitting of the aforementioned type in such a way that the manufacture of it by casting is simplified and made less expensive. ;This problem is solved in accordance with the invention in that the cavity in the fitting housing is continuous, that is, not annular, and does not surround an area of the material of the fitting housing left in the form of an island, and in that the inlet pipe passes through the cavity and is sealed on both sides by this against the fitting housing. ;-2- ;209373 ;According to the invention, therefore, the inflowing water is guided not only outside the fitting housing, but also inside the fitting housing, almost as far as the connection surface, and in particular beyond the range of the cavity inside the water inlet pipe or pipes. In this way bore holes in an area of the metal of the fitting housing left in the form of an island are no longer necessary for the guidance of the water. The cavity may thus be continuous, that is, not of annular form, which has the quite considerable advantage that in the casting operation during manufacture only a single, simple core has to be used. ;Each inlet pipe is usefully secured removably in the fitting body and the sealing against the fitting housing is effected by means of O-rings. This method of sealing is much more economical, since it is less labour-intensive than the possibility otherwise available of soldering the inlet pipe on both sides of the cavity. ;Embodiments of the invention are explained in greater detail below by means of the drawing, in which: ;fig. 1 shows a section through a fitting housing with inserted inlet pipe; ;fig. 2 shows a section through a second embodiment of a fitting housing with inserted inlet pipe. ;In fig. 1 the fitting body of a single^lever mixer which is made as a single-piece casting is indicated by the reference symbol 1. It contains a cavity 2 which communicates with the interior of the outlet 4 and is also connected by way of a bore hole 5 with an upper connection surface 6. On this is mounted in a known manner a regulation cartridge, which is not shown, containing the elements regulating the flow of water, with the insertion between of a seal in such a way that the water ;-3- ;209373 ;of the cartridge is passed into the bore hole 5. ;The cavity 2 of the fitting body 1 is not annular and thus has no area of material left in the form of an island with bore holes for the passage of water. The wall lying between the lower side of the fitting 13 and the cavity 2 is pierced by two bore holes 15 (only one of which can be seen in the drawing). For this purpose coaxial bore holes 7 in the wall between the connection surface 6 and the cavity 2 are doubly stepped down: by way of a first step 12a a first widening 8a follows the narrowest section of the bore hole 7 which opens into the connection surface 6. The diame'ter of the first widening 8a is slightly larger than the outside diameter of inlet pipes 9 (again, only one of these can be seen in the drawing) which are inserted from below into the bore holes 15 or 7, 8a. A second widening 8b is connected by way of a second step 12b, this widening opening into the cavity 2 and its diameter coinciding with that of the bore hole 15. ;The diameter of the bore hole 15 is again slightly larger than the diameter of a seam 10 which is formed by upsetting or the like in the wall of the inlet pipe 9 at a distance from the end of it and projects radially outwards. ;The inlet pipes 9, as mentioned, are inserted from the lower side 13 of the body of the fitting into the receiving bore holes 7, 8a, 8b, 15 so that their end sections • come to lie in the first widening 8a of the bore holes 7. They are sealed against the fitting body 1 on both sides of the cavity 2 by O-rings 11, 17. The upper O-ring abuts the second step 12b in the widening 8b and is separated by a spacing means 16 which passes through the cavity 2 from the lower O-ring 17, which rests on the seam 10 in the bore hole 15. ;A support plate 22 is screwed in a circular recess 21 to the lower side 13 of the fitting body 1 which abuts the seam 10 and fixes the inlet pipe 9 axially downwards and exe r ;-4- ;209373 ;pressure on the 0-r±ngs 11, 17. ;Suitable seals between the connection surface 6 about the openings of the bore holes 7 and the bottom of the regulation cartridge mounted on it ensure that water flowing in through the inlet pipe 9 is passed into inlet openings at the bottom of the regulation cartridge. ;In the drawing a spacer bolt 14 is also shown which is screwed into the lower side 13 of the fitting body 1 and serves in a known manner to secure the fitting to a washrbasin or the like. ;Fig. 2 shows a second embodiment. Corresponding parts are labelled with the same references as in fig. 1, plus 100. ;The fitting body 101 which is cast in one piece again has• an upper connection surface 106, a lower side 113 with a screwed-in spacer bolt 114 and an outlet 104. A cavity 102 in the interior of the fitting body 101 is again connected by a bore hole 105 to a regulation cartridge (which is not shown) mounted on the connection surface 106. ;As in fig. 1, the cavity 102 is not annular, and thus does not surround an area of material in the fitting body 101 left in the form of an island. This has, as has been mentioned, the great advantage that only one core is needed for the casting of the fitting body. ;The securing of the inlet pipe 109 (again only one can be seen in the drawing with reference to which the descarjiiption is given) is effected as follows: ;The wall of the fitting body 101 lying between the connection surface 10 6 and the cavity 102 is pierced by two bore holes 115. Coaxially with these run two bore holes 107 in the ;-5- ;§09373 ;These bore holes 10 7 are each provided with the formation of a step 112 towards diameter of the widening 108 coincides the bore hole 115 above in each case. ;On the step 112 of the bore hole 107 there is a first O-ring 111. In the widening 108 Of the bore hole 107 the lower end of a distance piece 116 is introduced from the top, which passes through the cavity 102 and the upper end of whioh extends into the bore hole 115. On the upper face of the distance piece 116 a second O-ring 117 rests. ;The inlet pipe 109, the outside diameter of which is again only slightly smaller than the diameter of the bore holes 107, «ula provided with a seam 110 which projects radially outwards and which is produced by upsetting or the like. The outside diameter of the seam 110 is slightly smaller than the diameter of the bore hole 115. ;Finally, a second distance piece 118, the upper face of which abuts the bottom of the regulation cartridge, which is again not shown,mounted on the connection face 106, rests on the seam 110. ;The seam 110, in the case of the embodiment as shown in fig. 2, might also be replaced by a flange on the end of the inlet pipe 109. The upper distance piece 118 could then be dispensed with and the O-ring 117, with a corresponding lengthening of the distance piece 116, would come to lie immediately beneath the flange. ;f's: H ;{ 7MAY1987*)/
and the cavity 102. with a widening 10 8, the cavity 102. The with the diameter of