EP2894265A1 - Pneumatic actuation device - Google Patents

Abstract

An actuating device (1) for a drain valve of a cistern comprises at least one actuator element (2) with an actuator plunger (3), which actuator element (2) serves to actuate a drain valve in the cistern, at least one actuation button (4) for actuation of the actuator element (2 ), which actuating key (4) is movable along an actuation movement from an initial position to an end position, one actuator lever (5) pivotable about a pivot axis (V) per actuator element (2), the actuation key (4) acting on the actuation lever (5) and wherein the actuating lever (5) acts on the actuator plunger (3), and a receptacle (6) on which the at least one actuator element (2), the at least one actuating button (4) and the actuating lever (5) are mounted. The actuating lever (5) is designed as a deflecting element, wherein during actuation the actuating key (4) is movable along a first direction (R1) and acts on the actuating lever (5), and wherein the actuator plunger (3) acts by the actuating lever acting as deflecting element (5) is movable along a second direction (R2), which second direction (R2) is inclined at an angle, in particular at right angles, to the first direction (R1).

Description

TECHNICAL AREA

The present invention relates to an operating device for a drain valve of a cistern according to the preamble of claim 1. In particular, the invention relates to a pneumatic actuating valve.

STATE OF THE ART

From the EP 2 169 126 a pneumatic actuator has become known. About an actuator plate, a pressure movement is applied to a handle plunger of a pneumatic valve.

Although with the EP 2 169 126 Very good results in terms of reliability have been achieved, the actuator needs after the EP 2 169 126 seen from the front a comparatively large installation space. The opening in which the actuating device is mounted, must be made comparatively large.

PRESENTATION OF THE INVENTION

Based on this prior art, the invention has for its object to provide an actuating device, in particular a pneumatic actuator, which overcomes the disadvantages of the prior art. In particular, the flexibility of the arrangement of the parts should be increased. Another aspect is the reduction of the required installation space.

This object is achieved by the subject matter of claim 1. Accordingly, a Actuating device for a drain valve of a cistern at least one actuator element with a Aktuatorstössel, which serves actuator element of the actuation of a drain valve in the cistern, at least one actuator button for actuating the actuator, which actuating button along an actuating movement of a starting position is movable to an end position per actuator to one Pivot axis pivotable actuating lever, wherein the actuating button acts on the actuating lever and wherein the actuating lever acts on the Aktuatorstössel, and a receptacle on which the at least one actuator element, the at least one actuating button and the actuating lever or the actuating lever are mounted. The actuating key is movable in the actuating movement along a first direction and acts on the actuating lever. The actuator tappet is movable along the second direction by the actuating lever acting as a deflecting element, which second direction is inclined at an angle, in particular at right angles, to the first direction.

Consequently, therefore, the direction of movement of the actuating button is deflected with respect to the direction of movement of the Aktuatorstössels. This deflection has the advantage that the individual parts can be arranged more flexibly, whereby, for example, the installation space can be optimized, in particular reduced in size.

The direction of the actuating movement is deflected by the actuating lever. Particularly preferably, the actuating movement is deflected by 90 °. The actuating lever is acted upon by the actuating button with a movement such that the actuating lever moves angularly with respect to this movement about the pivot axis and thus acts on the actuator tappet. In other words, it can be said that the operating lever with respect to the direction of movement of the actuating button can be designed as a rocker arm.

The actuating device is preferably a pneumatic actuating device and comprises as at least one actuator element a pneumatic actuator element. The pneumatic actuator element works together with a pneumatically controllable drain valve. A pneumatic cistern assembly includes a pneumatic drain valve and an actuator with said actuator element. Especially with a pneumatic actuator button has the Actuator according to the invention has the advantage that a pneumatic actuator whose minimum volume is usually predetermined by the piston or cylinder size, can be arranged flexibly.

Particularly preferably, the actuating button is movably mounted in a first guide along the first direction and the Aktuatorstössel is movably mounted in a second guide along the second direction, which second guide is inclined at an angle, in particular at right angles to the first guide. The angle between the first guide and the second guide corresponds to the angle between the first direction and the second direction. In summary, the direction of movement of the actuating button is inclined at an angle, in particular at right angles, to the direction of movement of the actuator plunger.

Preferably, the first direction defines a first plane or its orientation and the second direction is inclined at an angle, in particular at right angles, to this first plane.

A second plane runs parallel to the second direction and is thus inclined at an angle, in particular at right angles, to the first plane. The movement of the actuation keys can also be defined with respect to the levels as follows: The actuation key is movable during the actuation movement out of the second plane or a plane extending parallel thereto and acts on the actuation lever. The actuating lever acts on the actuator plunger, which is movable out of a first plane, which planes are inclined at an angle, in particular at right angles to each other.

Preferably, the first plane extends in the installed position in the vertical, while the second direction is in the installed position in the horizontal. Alternatively, the first plane extends in the installed position in the horizontal, while the second direction is in the installed position in the vertical Other orientations are also conceivable.

The pivot axis of the actuating lever is preferably parallel and preferably spaced from the first plane and the second direction.

Particularly preferably, the movement of the actuating button is a rectilinear movement or is a pivoting movement. The said movement takes place essentially in the first plane or parallel to it. The movement of the actuator ram is preferably a rectilinear motion.

Particularly preferably, a third plane, which is perpendicular to the first and the second plane, extends centrally through the actuating lever. The pivot axis extends at right angles to the third plane and parallel to the second plane.

Particularly preferably, the actuating lever is pivoted relative to the second plane or a parallel plane. In other words, the angle between parts of the operating lever and the second plane changes.

The actuating lever preferably comprises a first lever arm and a second lever arm connected at an angle, preferably at right angles, to the first lever arm, wherein the first lever arm has a contact portion via which the actuating key acts on the actuating lever and wherein the second lever arm acts on the actuator plunger. In other words, it is preferably an angled or cranked operating lever.

The contact portion is preferably a cam which extends from the operating lever in the direction of the actuating button. The cam comes into contact with the actuating button.

Preferably, the first lever arm comprises a pivot bearing pin, with which the actuating lever is pivotally mounted on a pivot bearing pin receptacle on the receptacle, wherein the pivot bearing pin is preferably arranged at the free end of the first lever arm. The free end is opposite the junction between the first lever arm and the second lever arm. Preferably, two pivot bearing pins are provided, which protrude on both sides of the actuating lever.

Preferably, the second lever arm acts with its free end on the actuator tappet. The free end of the second lever arm is opposite to the connection point between the first lever arm and the second lever arm.

Particularly preferably, the actuator element is a pneumatic actuator and the actuator tappet is in communication with the piston of the pneumatic actuator. The piston has a diameter that is several times greater than the path of movement of the piston in the piston chamber. It is therefore a flat trained pneumatic actuator.

Preferably, the pneumatic actuator comprises a piston chamber and a movable piston in the piston chamber plate with a rotating rolling diaphragm, which piston plate is in communication with the actuator plunger and is operable with this and is parallel to the first plane.

Other types of actuators are also conceivable. For example, electric actuators.

Particularly preferred exactly two actuator elements are arranged and there are exactly two operating levers present, wherein in each case an actuating lever is associated with an actuator.

Preferably, the actuator plunger of one actuator element is movable in a different direction than the actuator plunger of the other actuator element and the actuating lever can be pivoted in different pivoting directions. As a result, the required installation space can be further optimized.

Preferably, a bearing for the actuating button is provided on the receptacle between the actuating levers, which acts on both actuating lever, wherein the actuating button is designed as a rocker which is pivotable about an axis defined by the bearing rocker axis, which rocker axis parallel to the second direction and at right angles to the pivot axis runs.

Particularly preferably, the receptacle comprises a flange with an opening, wherein the flange adjoins the opening around a housing portion which extends in the direction of the first plane.

Particularly preferably, the housing section substantially comprises two housing chambers, in each of which an actuating lever is arranged. Particularly preferably, the actuating lever protrudes from the housing chamber, wherein it comes outside of the same with the actuator tappet in contact.

Further embodiments are given in the dependent claims.

BRIEF DESCRIPTION OF THE DRAWINGS

Fig. 1

eine perspektivische Ansicht einer Betätigungsvorrichtung nach einer ersten Ausführungsform;

Fig. 2

eine weitere perspektivische Ansicht der Betätigungsvorrichtung gemäss Figur 1;

Fig. 3

eine weitere perspektivische Ansicht der Betätigungsvorrichtung nach Figur 1 mit teilweise geschnittenen Bereichen;

Fig. 4

eine teilweise geschnittene Draufsicht auf die Betätigungsvorrichtung nach Figur 1;

Fig. 5

eine Schnittdarstellung der Figur 4 entlang der Schnittlinie V-V; und

Fig. 6

eine Schnittdarstellung der Figur 4 entlang der Schnittlinie VI-VI.

Preferred embodiments of the invention will be described below with reference to the drawings, which are given by way of illustration only and are not to be interpreted as limiting. In the drawings show:

Fig. 1

a perspective view of an actuator according to a first embodiment;

Fig. 2

a further perspective view of the actuator according to FIG. 1 ;

Fig. 3

a further perspective view of the actuator according to FIG. 1 with partially cut areas;

Fig. 4

a partially sectioned plan view of the actuator according to FIG. 1 ;

Fig. 5

a sectional view of FIG. 4 along the section line VV; and

Fig. 6

a sectional view of FIG. 4 along the section line VI-VI.

DESCRIPTION OF PREFERRED EMBODIMENTS

In the figures, a preferred embodiment of an operating device 1 for a drain valve of a cistern is shown. The actuator 1 is used to control the drain valve in the cistern, with the drain valve flushing water from the cistern is removed.

The actuating device 1 according to the embodiments of the shown in FIGS Present invention comprises at least one actuator element 2 with an actuator tappet 3, which actuator element 2 serves to actuate a drain valve in the cistern, at least one actuator button 4 for actuating the actuator element 2, which actuating button 4 along an actuating movement of a starting position is movable into an end position, a order a pivot axis V pivotable actuating lever 5, wherein the actuating button 4 acts on the actuating lever 5 and wherein the actuating lever 5 acts on the Aktuatorstössel 3, and a receptacle 6, on or in which the at least one actuator element 2, the at least one actuating button 4 and the at least an actuating lever 5 are mounted. For each actuator element 2, an actuating lever 5 is arranged in each case.

Upon actuation of the actuating button 4, the actuating button 4 is moved in the direction of the actuating lever 5, whereby the actuating lever 5 is pivoted about the pivot axis V accordingly. As a result of this pivoting movement, the actuating lever 5 acts on the actuator plunger 3 of the actuator element 2 and actuates it accordingly. The direction of the actuating movement is deflected by the actuating lever 5 from the actuating direction of the actuating button 4 to the actuating direction of the Aktuatorstössels 3. The direction of movement of the actuating button 4 is inclined at an angle, in particular at right angles, to the direction of movement of the actuator tappet 3. The movement to the actuating button 4 is thereby deflected by the actuating lever 5 accordingly.

Starting from the initial position, the actuating button 4 is moved during the actuating movement from a first direction R1 and acts on the actuating lever 5. The actuating lever 5 is pivoted upon the action of the actuating movement about the pivot axis V and acts on the Aktuatorstössel 3, which then along a second Direction R2 is moved. The second direction R2 is preferably inclined at an angle, in particular at right angles, to the first direction R1.

In summary, the actuating movement of the actuating button 4 by the actuating lever 5 from a movement in the first direction R1 in a movement along the second direction R2, which is inclined at an angle to the first direction R1, diverted. By deflecting the direction of movement from the first direction R1 in the second direction R2, the actuator 1 can be made more compact.

The first direction R1 defines a first plane E1. The first direction R1 defines the first plane such that the first direction R1 is in this first plane or parallel thereto. A second plane E2 is defined by the second direction R2. The first plane E1 is therefore inclined at an angle, in particular at right angles, to the second plane E2.

With regard to the planes, the following can be said with regard to the movement of the actuating button 4 and of the actuator plunger 3: The actuating button 4 lies in the starting position in the second plane E2 or parallel thereto and then becomes relative to this second plane E2, in particular out of the plane E2, emotional. The movement out of the plane E2, for example, is a movement at right angles or along a curved curve to the second plane E2 and parallel to the first plane E1.

Starting from the initial position, the actuating button 4 is moved during the actuating movement out of a second plane E2 and acts on the actuating lever 5. The actuating button 4 is in the starting position in the second plane E2 and then relative to this second plane E2 out of the plane E2 moved out. The actuator plunger 3, which is actuated by the actuating lever 5, is moved out of its rest position in or parallel to the first plane E1 out of the first plane E1 into its end position. The actuator tappet 3 is preferably moved at right angles to said first plane E1.

The movements of the actuating button 4 of the actuating lever 5 and the Aktuatorstössels 3 can be well in the FIGS. 4 to 6 be recognized.

In the FIG. 4 the first plane E1 is parallel to the drawing sheet plane and the second plane E2 is at right angles to the drawing sheet plane. In the FIG. 4 the actuating button 4 is already shown pressed, the actuating button 4 has been moved from its initial position in the first direction R1 in its final position. In the embodiment shown here, the operation key 4 has been pivoted accordingly. A linear translatory movement would also be conceivable.

During the movement from the rest position to the end position, the actuating key 4 hits the actuating lever 5, whereupon it is pivoted about the pivot axis V. In the FIG. 6 the actuating lever 5 is already shown in the pivoted position. The actuating button 4 is already here in the end position. Also in the end position is the actuator plunger 3, which has been moved in the second direction R2 inclined at an angle to the first direction R1. In the FIG. 5 will be the same situation as in the FIG. 6 shown in the non-actuated state. The actuator plunger 3 is here in the starting position and is moved out during a possible actuation along the second direction R2. The same can be said for the actuating button 4, which is also in the starting position here and is moved from the starting position in the first direction R1.

The pivot axis V is parallel and preferably spaced from the first plane E1 and the second plane E2.

The movement of the operation key 4 may be a rectilinear motion. In the figures, however, the embodiment of a pivoting movement is shown. The actuating button 4 is pivoted about a rocker axis W. The actuating button 4 has the shape of a rocker.

The actuator tappet 3 preferably moves along a rectilinear motion, as well as in the FIGS. 5 and 6 is shown.

With regard to the levels, it should also be noted that a third plane E3, which is perpendicular to the first and the second plane E1, E2, preferably extends centrally through the actuating lever. This third plane is substantially perpendicular to the pivot axis V.

The operating lever, which in the Figures 3 . 5 and 6 can be well recognized comprises in the present embodiment, a first lever arm 7 and an angle, preferably at right angles, in the first lever arm 7 subsequent second lever arm. 8 The first lever arm 7 has a contact section 9, via which the actuating button 4 acts on the actuating lever 5. The actuating button 4 is therefore in contact with the contact section 9 of the actuating lever 5 with the actuating lever 5. The second lever arm 8 acts as in the Figures 3 . 5 and 6 shown, on the actuator tappet 3. About this second lever arm 8 of the actuator tappet 3 is actuated accordingly.

In the present embodiment, the contact section 9 has the shape of a cam, which extends from the first lever arm 7 in the direction of the actuating button 4.

The first lever arm 7 comprises two pivot bearing pins 10, which extend laterally to the first lever arm 7. The pivot bearing pins 10 are arranged at the free end 12 of the first lever arm 7. The free end 12 is located opposite the connection point 21 between the first lever arm 7 and the second lever arm 8. The pivot bearing journal 10 is mounted in a pivot bearing journal receptacle 11. The pivot bearing pin receptacle 11 is part of the receptacle. 6

The second lever arm 8 acts with its free end 13 on the Aktuatorstössel 3. The free end 13 is opposite to the connection point 21 is arranged. In the region of the actuator tappet 3, the free end 13 of the second lever arm 8 in this embodiment has a contact point 25 which acts on the actuator tappet 3.

Particularly preferably, the actuator element 2 is a pneumatic actuator. The actuator plunger 2 is a piston or part of the piston of the pneumatic actuator. In other embodiments, the actuator element 3 may also be an electrical or other actuator element.

From the sectional views of the FIGS. 5 and 6 the most preferred pneumatic actuator element 3 is shown. This involves a pneumatic actuator with a piston chamber 14 and a piston plate 15 which can be moved into the piston chamber 14. The piston chamber 14 opens to a connecting piece 22, which is in communication with the drain valve via a pneumatic line. The actuator tappet 3 is fastened here to the piston plate 15. Upon actuation of the Actuating button 4, the actuating lever 5 acts as described above on the Aktuatorstössel 3 and thereby the piston plate 15 is inserted into the piston chamber 3, whereby the volume is reduced and the air in the piston chamber 14 is displaced through the connection 22 to the drain valve of the cistern. This allows the waste set to be operated accordingly. The piston plate 15 is connected to a rolling diaphragm 16 in connection, which on the one hand has sealing effect and on the other hand serves as a return element. Upon actuation, the rolling diaphragm 16 is unrolled accordingly, as well as in the FIG. 6 is shown, as soon as the pressure on the actuating button 4 and the operating lever 5 is omitted, the corresponding parts are returned to their original position. In this respect, the rolling diaphragm 16 has the function of a restoring element.

Further return elements can also be arranged within the receptacle 6. These return elements can act, for example, on the back of the actuating button 4 and then move them from the end position back to the starting position.

In the particularly preferred embodiment exactly two actuator elements 2 are arranged. One of the actuator elements 2 serves to trigger a full-flush and the other of the actuator 2 serves to trigger a partial flush. Accordingly, exactly two actuating levers are present, wherein in each case an actuating lever 5 is assigned to one of the two actuator elements 2. With respect to the operation key 4, various configurations are advantageous. In the embodiment shown in the figures, a single actuating button is arranged, which is designed as a rocker switch and on which one or the other actuating lever 5 acts. The user can select the full flush or the Teilmengenspülung by appropriate actuation of this rocker switch. In other embodiments, a key can also be arranged per actuating lever 5, the key then being assigned to the respective actuating lever 5.

In the particularly preferred embodiment, the actuator elements 2 are arranged with respect to their position different from each other. One of the actuator elements 2 stands upside down with respect to the other actuator element 2. Consequently, actuator tappet 3 of the actuator element 2 in a different, in particular opposite, direction moved as the Aktuatorstössel 3 of the other actuator element 2. By this different arrangement, the two operating lever 5 are arranged upside down with respect to each other. One of the actuating lever 5 is thereby pivoted in one direction and the other actuating lever 5 is pivoted in the other direction. This type of arrangement has the advantage that the available space is best possible divisible.

Of the FIGS. 1 and 2 can be well recognized that between the two operating levers 5 on the receptacle 6 a bearing 17 is arranged. The bearing 17 is used to support the actuating button 4. The bearing 17 comprises in the present embodiment, two openings 23, in which the actuating button 4 engages with correspondingly formed pin 24. The bearing 17 provides with the openings 23 and the pin 24 a rocker axis W ready. To this rocker axis W, the operation button 4 is pivotable. The rocker axis W is arranged at right angles to the first plane E1 and preferably at right angles to the pivot axis V.

Further, the receptacle 6 comprises a flange 18 with an opening 19. The flange 18 defines the orientation of the second plane E2. The flange 18 is adjoined, around the opening 19, by a housing section 20, which extends away from the second plane E2. The housing portion 20 extends in substantially the same direction as the first plane E1. In the housing section 20, the actuating lever 5 are arranged. The pivot bearing journal receptacle 11 is likewise located in the housing section 20 or is an integral part thereof. The same applies to the bearing 17 for the actuating button. 4

The actuator elements 3 are likewise arranged on the housing section 20 or part thereof.

On the outside, the housing portion 20 also has a threaded portion 26, with which the actuator 1 can be attached to a corresponding receptacle. The threaded portion 26 is in communication with a threaded nut, not shown, and the threaded nut clamps the actuator 1 together with the flange 18 to a support structure.

At the front, the actuating button 4 has a multiplicity of receiving elements 27. These receiving elements 27 serve to receive a cover plate via which the user then gives the force to the actuating button 4.

LIST OF REFERENCE NUMBERS

1

actuator

2

actuator

3

actuator rams

4

actuating button

5

actuating lever

6

admission

7

first lever arm

8th

second lever arm

9

Contact section

10

Gudgeon pins

11

Pivot bearing pin receiver

12

free end

13

free end

14

piston chamber

15

piston plate

16

rolling diaphragm

17

depository

18

flange

19

opening

20

housing section

21

junction

22

connector

23

opening

24

spigot

25

contact point

26

thread

27

receiving elements

V

pivot

W

rocker axis

R1

first direction

R2

second direction

E1

first floor

E2

second level

E3

Third level

Claims (17)

Actuator (1) comprising for a drain valve of a cistern,
at least one actuator element (2) with an actuator plunger (3), which actuator element (2) serves to actuate a drain valve in the cistern,
at least one actuating button (4) for actuating the actuator element (2), which actuating button (4) is movable along an actuation movement from a starting position into an end position,
one actuating element (5) pivotable about a swiveling axis (V), the actuating button (4) acting on the actuating lever (5) and the actuating lever (5) acting on the actuator plunger (3), and
a receptacle (6) on which the at least one actuator element (2), the at least one actuating button (4) and the actuating lever (5) are mounted,
characterized,
in that the actuating lever (4) is movable along a first direction (R1) and acts on the actuating lever (5), and wherein the actuator plunger (3) acts through the deflection element Actuating lever (5) along a second direction (R2) is movable, which second direction (R2) inclined at an angle, in particular at right angles, to the first direction (R1). Actuating device according to claim 1, characterized in that the first direction defines a first plane (E1) and that the second direction (R2) inclined at an angle, in particular at right angles, to this first plane (E1). Actuating device according to claim 2, characterized in that the first plane (E1) seen in the installed position extends in the vertical, while the second direction (R2) extends in the installed position in the horizontal or that the first plane (E1) seen in the installed position in the horizontal in that the second direction (R2) is in the installed position in the vertical. Actuating device according to one of the preceding claims, characterized in that the pivot axis (V) parallel and preferably spaced from the first plane (E1) and the second direction (R2). Actuating device according to one of the preceding claims, characterized in that the movement of the actuating button (4) is a rectilinear movement or a pivoting movement and / or that the movement of the Aktuatorstössels (3) is a rectilinear movement. Actuating device according to one of the preceding claims 2 to 5, characterized in that the actuating lever (5) is pivotable relative to the said first plane (E1). Actuating device according to one of the preceding claims, characterized in that the actuating lever (5) comprises a first lever arm (7) and a second lever arm (8) adjoining the first lever arm (7) at an angle, preferably at right angles, with the first lever arm (7) ) has a contact portion (9), via which the actuating button (4) acts on the actuating lever (5) and wherein the second lever arm (8) acts on the actuator plunger (3). Actuating device according to claim 7, characterized in that the first lever arm (7) at an actuated lever (5) is not inclined, inclined at an angle, in particular at right angles to the first plane (E1), while the second lever arm (8) substantially parallel to the first plane (E1 ) lies. Actuating device according to claim 7 or 8, characterized in that the first lever arm (7) comprises a pivot bearing pin (10), with which the actuating lever (5) is mounted on a pivot bearing pin receptacle (11) on the receptacle (6), wherein the pivot bearing pin ( 10) is preferably arranged at the free end (12) of the first lever arm (7). Actuating device according to claim 8 or 9, characterized in that the second lever arm (8) with its free end (13) acts on the actuator tappet (3). Actuating device one of the preceding claims, characterized in that the actuator element (2) is a pneumatic actuator and the actuator ram is a piston. Actuating device according to claim 11, characterized in that the pneumatic actuator comprises a piston chamber (14) and a in the piston chamber (14) movable piston plate (15) with a rotating rolling diaphragm (16), which piston plate (15) is in communication with the Aktuatorstössel as well as with this is actuated and preferably parallel to the first plane (E1). Actuating device according to one of the preceding claims, characterized in that the actuator element (2) comprises a return element which resets the actuator element (2) after actuation, wherein the restoring movement generated by the return element acts on the actuating button via the actuating lever, and / or the actuating button (4) has an additional return element. Actuating device according to one of the preceding claims, characterized in that exactly two actuator elements (2) are arranged and exactly two actuating levers (5) are present, wherein in each case an actuating lever (5) is associated with an actuator element (2). Actuating device according to claim 14, characterized in that the Aktuatorstössel (3) of an actuator element (2) is movable in a different direction than the Aktuatorstössel (3) of the other actuator element (2) and that the actuating lever (5) are pivotable in different pivoting directions , Actuating device according to claim 14 or 15, characterized in that on the receptacle (6) between the actuating levers (5) a bearing point (17) for the actuating button (4) is provided, which acts on both actuating levers (5), wherein the actuating button ( 4) is designed as a rocker, which by the bearing point (17) defined rocker axis (W) is pivotable, which rocker axis (W) at right angles to the first plane (E1) and parallel to the second direction (R2). Actuating device according to one of the preceding claims, characterized in that the receptacle (6) comprises a flange (18) with an opening (19) and that the flange (18) adjoins a housing section (20) around the opening (19), which extends away from the flange (18), wherein the housing portion (20) extends in substantially the same direction as the first plane (E1).

Images