The invention relates to an angle valve for the connection of sanitary fixtures, with a housing comprising an inlet connection and an outlet connection, between which a valve seat is formed which corresponds with the sealing surface of a valve spindle, the valve spindle is made of plastic and having a thread with a cooperating thread in the housing, and a retaining ring for securing the valve stem against unscrewing.

The connection of washing or sink fittings is usually done with the help of angle valves (see. Eg. Schell angle valve "Comfort" Product no. 0491 60699). The angle valves have an inlet connection for connection to wall connection fitting of the plumbing of the building, lop exit a for connecting the outlet fitting and a shutoff valve on.

The angle valves provided in the valve stem for blocking or adjusting the water flow to the associated valve is usually made of brass. The valve stems are actuated by means of a handle. For the actuation of the spindles, these are provided with a metric fine thread, which corresponds to an angle valve provided in the housing of the metallic thread. The valve stem is secured against unscrewing of the housing according to DIN 3227th This is usually done by a round wire ring of metal which is in an annular groove in the valve housing at-ordered. With the valve fully open, the thread of the valve spindle is pressed against the locking ring and thereby prevented the stem from unscrewing.

In addition to the above-described angle valves also made of metal such angle valves are known which are prepared, inter alia for reasons of hygiene fully or partially made of plastic. For corner valves with a plastic spindle, the long-term behavior of plastics requires a reinforcement in the spindle thread. The angle valves described in the above-metal

next the application metric thread has due to the decreasing strength plastic over other thread forms no sufficient shear area in order to ensure long-term sealing when the pressures that occur in the water lines of the building installation. On base of the thread geometry, in particular with respect to the pitch and the flank height with trapezoidal threads of plastic, is a travel limiter means of round wire ring, as it is used in the above-angle valves made of metal for use inappropriate. The point load at the end of the trapezoidal thread would result in use of round wire rings as a backup to the flow of the plastic material and thereby damaging the threads. The function of the angle valve made of plastic would therefore no longer be guaranteed.

The invention aims to provide a remedy. The invention is based on the object to provide an angle valve in which an unscrewing protection device is provided for a plastic spindle, which ensures the reliability of the angle valve, even at high system pressures. According to the invention this object is achieved in that the retaining ring has an inner cone which corresponds to a taper of the valve stem.

With the invention, an angle valve is provided in which a reliable operation is guaranteed even at high system pressures within the building installation pipes and at the same time provides a reliable safety against unscrewing of the spindle of plastic. This is ensured that wedge because of the corresponding cones of the locking ring on one hand and the valve spindle on the other hand with an increasing pressure on the spindle, the cones each other, whereby an additional clamping force is generated. Thus, with increase in pressure and an increase of the clamping force is generated against unscrewing onto the spindle.

Advantageously, the lock-ring is a in an annular groove of the housing and is supported against a shoulder of the housing with an abutment surface from. This configuration ensures that the locking ring retains examples even under high force impact the spindle position within the angle valve and thus can reliably ensure the safety of the spindle in angle valve.

the retaining ring made of plastic is preferred. The preparation of the Siche approximately-rings made of plastic is attractive for a cost standpoint, on the other hand thereby provides a very good combination of materials consisting of plastic between the spindle and the locking ring a.

In a further development of the invention the securing ring of a disk and a shoulder is formed. This is a structurally simple configuration that is simple and inexpensive to manufacture.

In another embodiment of the invention, the retaining ring has cutouts which are formed in the disc, and cut-outs formed in the paragraph, wherein the cutouts are arranged alternately each other on the retaining ring. In this way, the mounting of the locking ring is simplified because, in a simple way, a sliding of the locking ring and thus an entry of the cutouts in the annular groove of the housing is easily possible during assembly of the corner valve.

In another embodiment of the invention the locking ring has a slot. This causes the locking ring is split so that there is also the possibility to mount the locking ring angle valve in a simple manner. When sliding of the locking ring in the valve connecting piece, the retaining ring compresses the area of ​​the gap, so that the locking ring can pass through the entrance and to enter the annular groove in which he relaxes again.

More preferably, the thread of the valve spindle is a trapezoidal thread. The formation of the thread as a trapezoidal thread has been found in the use of valve stems made of plastic to be particularly suitable, because the trapezoidal thread has a relatively high load capacity.

Other improvements and embodiments of the invention are specified in the remaining sub-claims. Embodiments of the invention are illustrated in the drawings and will be described in detail below. Show it:

Figure 1 is a longitudinal section through an angle valve, wherein in the lower half of the closed, in the upper half of the open state is shown;

Figure 2 shows the detail "X" from Figure 1 on an enlarged scale;

3 shows the longitudinal section through the housing of an angle valve;

Figure 4 is a section through a valve stem;

5 shows the section along the line AA in Figure 6

6 shows the view of a snap ring, and

Figure 7 is a section through a sealing ring in another embodiment.

The selected as an embodiment of angle valve has a housing. 1 The housing 1 is typically made of metal. However, it can also be made of plastic. It comprises an inlet connection 1 1 and an outlet connection 13 and a valve stub 26, wherein inlet pipe connection 1 1 and valve connector 26 coaxially with each other, the outlet pipe 13 are oriented at right angles thereto. In the housing 1, a valve stem 3 is arranged, which is secured with a retaining ring 4, 104 in the valve connection 26 and is actuated by means of a handle. 5

The inlet connector 1 1 is provided at its free end outside with a thread 12; inside is formed an inlet hole 15 °. In the transition between the inlet connection 1 1 and the valve nozzle 26, a valve seat hole 1 6 is formed, which comprises a valve seat 17th On the valve seat 17, a spindle mount 20 joins the valve stub 26th Of the spindle mount 20 a through hole 18 is in the direction of the outlet nozzle 13, which is penetrated by an outlet bore 19th Outside of the outlet port 13 is provided at its free end with a thread fourteenth

In the valve connection 26 a free rotation 21 is adjoined by the spindle taper 20th The valve connector 26 is provided with an internal thread 22 for the valve spindle 3, which adjoins the free rotation of the 21st The internal thread 22 terminates in an annular groove 24 which forms the valve stub 26 at the free end an inwardly directed paragraph 23rd Outside of the valve nozzle 26 is also provided with a shoulder 25th

The valve spindle 3 is rotationally symmetrical. It is made of plastic. The valve spindle 3 has, in its the inlet connection 1 1 abge-facing area outside a thread 31, which corresponds in the assembled state with the thread 22 of the housing. 1 Adjacent to the thread 31 is formed at the inlet nozzle 1 the 1 end facing away from a cone 32nd Inside is a handle seat provided in this region of the valve spindle 3 37, which is formed and deposited adjacent to its bottom has an annular groove 38th

The valve spindle 3 is provided externally in its central portion with a shoulder 35, are introduced into the annular grooves 36th In the assembled state, the valve spindle is open-gen sealed through 3 arranged in the annular grooves 36 sealing rings 39, the spindle taper 20th On its inlet nozzle 1 1 end facing a sealing surface 34 is formed, which corresponds in the assembled state with the valve seat 17th In the exemplary embodiment the valve spindle 3 is provided with an insert 33 which is inserted in an annular recess. The insert 33 may be made of a material Various NEN-of the valve stem. 3 The insert 33 is provided to improve the manufacturing conditions for the production of the valve stem. 3 At the same time the stability of the valve spindle 3 can be a total increase in particular by selection of a stable material for use 33rd In modification of the embodiment it is also possible to spray to the Ven-3 tilspindel a plug.

At the free end of the valve stub 26, the locking ring 4, arranged 104 for the valve stem. 3 The locking ring 4, 104 is made of plastic and has a through bore 49, 149 for the valve spindle 3 on in its center. The locking ring 4, 104 is from a disk 41, 141 and an adjoining shoulder 43 formed 143rd He has an inner cone 44, the 144th The outside of the locking ring 4, a groove 104 45, 145 vorgese-hen that a stop surface 46, 146 is formed. On the inlet connection 1 1 in the assembled state facing side of the locking ring 4, 104 a phase 47, provided 147th

In the embodiment of Figures 5 and 6 of the segmented locking ring 4 is formed, as can be seen in particular from FIG. 6 For this purpose, the backup ring 4 on the periphery of the disc is provided with cutouts 42 41st Simultaneously, the shoulder 43 is provided with cutouts 48th The cutouts 42 and 48 are disposed on the locking ring 4, alternating with each other. The retaining ring 104 shown in Figure 7 has a slot 140th

The handle 5 is formed in a conventional manner. He has a shoulder 51 for receiving the valve stem. 3 The shoulder 51 is surrounded by a circumferential surface 53, thereby forming a ring-shaped receiving opening 52 is formed for the casing 1 between shoulder 51 and lateral surface 53rd The grip 5 is engaged with the spindle 3 by engaging a circumferential and semi-annular in cross-section projection in the annular groove 38 of the spindle. 3

The angle valve according to the invention allows a travel limiter for a spindle made of plastic without affecting the function of the valve. Due to the correspondence of the Innenkonusse 44, 144 of the locking ring 4, 104 with the cone 32 of the spindle 3, a solution is created which causes an additional clamping effect at elevated pressure to the spindle during the unscrewing or at elevated water pressures, so that the effect of Siche -rungsrings 4, is additionally increased 104th A failure of the locking ring is thus avoided. By varying the angle of the inner cone 44, 144 on one hand and of the cone 32 on the other hand, an influence of the clamping action can be caused. Particularly when using the snap ring 4,

claims

Angle valve for the connection of sanitary fittings comprising a housing (1) comprising an inlet nozzle (1 1) and an outlet nozzle (13), between which a valve seat is formed (17) corresponding with the sealing surface (34) of a valve spindle (3), wherein the valve stem (3) is made of plastic and has a thread (31), which cooperates with a thread (22) in the housing (1) and a retaining ring (4) for securing the valve stem (3) against unscrewing, characterized in that that the locking ring (4, 104) an inner cone (44, 144), corresponding to a cone (32) of the valve spindle (3).

2. Angle valve according to claim 1, characterized in that the locking ring (4, 104) in an annular groove (24) of the housing rests (1) and with a stop surface (46, 146) against a shoulder (23) of the housing (1 ) is supported.

is 3. Angle valve according to claim 1 or 2, characterized in that the angle of the inner cone (44, 144) of the locking ring (4, 104) equal to the angle of the cone (32) of the valve spindle (3).

4. unequal angle valve according to claim 1 or 2, characterized in that the angle in that the inner cone (44, 144) of the locking ring (4, 104) the

is angle of the cone (32) of the valve spindle (3).

5. angle valve according to any one of the preceding claims, characterized in that the locking ring (4, 104) is made of plastic.

6. Angle valve according to any one of the preceding claims, characterized in that the securing ring is formed (4, 104) by a disk (41, 141) and a shoulder (43, 143) gekennzeich- net.

having 7 angle valve according to claim 6, characterized in that the locking ring (4) cut-outs (42) formed in the disc (41), and cutouts (48) formed in the shoulder (43), the cutouts (42, 48) alternating each other on the retaining ring (4) are arranged.

8. angle valve according to any one of the preceding claims, characterized in that the locking ring (104) has a slot (14).

9. angle valve according to any one of the preceding claims, characterized in that the thread (31) of the valve spindle (3) is a trapezoidal thread.

10. Angle valve according to any one of the preceding claims, characterized in that the housing (1) made of plastic.