Actuating device for a drain fitting and drain fitting with such an actuating device and method of mounting such a drain fitting

Abstract

The actuating device comprises a push button housing ( 7 ), which may be inserted into an opening ( 4 ) in the cistern lid ( 2 ). At least one push button ( 8, 9 ) and a pusher ( 11 ) are mounted in the push button housing ( 7 ) for triggering flushing. The push button housing ( 7 ) is fastened only to the cistern lid ( 2 ) and may be lifted with the cistern lid ( 2 ) off the at least one push button ( 8, 9 ) and the pusher ( 11 ). The actuating device is particularly suitable for cisterns of ceramic material and enables simpler and quicker mounting as well as servicing of the cistern.

1 .- 14 . (canceled) 
   
   
       15 . Actuating device for a drain fitting of a cistern, having a push button housing, which may be inserted into an opening in a cistern lid, having at least one push button mounted in this push button housing and having a pusher, which may be moved downwards to trigger flushing by actuation of the at least one push button, wherein the push button housing is fastened only to the cistern lid and may be lifted off the at least one push button and the pusher together with the cistern lid. 
   
   
       16 . Device according to  claim 15 , wherein the at least one push button, the pusher, a guide element and the push button housing form a unit. 
   
   
       17 . Device according to  claim 16 , wherein said unit may be screwed on. 
   
   
       18 . Device according to  claim 17 , wherein the guide element comprises an external thread to fasten it to the drain valve. 
   
   
       19 . Device according to  claim 18 , wherein the push button housing is connected for rotation to the guide element, such that the actuating device may be screwed onto the drain fitting using the push button housing as mounting aid. 
   
   
       20 . Device according to  claim 19 , wherein the push button housing comprises at its bottom edge at least one recess, in which engages a dog of the guide element. 
   
   
       21 . Device according to  claim 15 , wherein the push button housing comprises in a lower region an external thread for a fastening nut. 
   
   
       22 . Device according to  claim 15 , wherein the pusher comprises a pin, which is screwed into a sleeve, the pin being connected to a push button and the sleeve being movable downwards to trigger flushing. 
   
   
       23 . Drain fitting having an actuating device according to  claim 15 , wherein it comprises at least one lever for triggering flushing, which may be swivelled upon actuation by the actuating device. 
   
   
       24 . Drain fitting according to  claim 23 , wherein it comprises a connecting element, which connects the drain valve to the actuating device. 
   
   
       25 . Drain fitting according to  claim 23 , wherein it is provided for dual flushing and that the actuating device comprises two push buttons. 
   
   
       26 . Method of mounting a drain fitting according to  claim 23 , wherein the cistern lid is set in place, the actuating device is fastened as a mounting unit to the drain valve through an opening in the cistern lid. 
   
   
       27 . Method according to  claim 26 , wherein the mounting unit is screwed onto a yoke of the drain valve. 
   
   
       28 . Method according to  claim 26 , wherein upon fastening of the mounting unit to the drain valve, a pin connected to a push button is screwed into a sleeve, the pin forming with the sleeve a pusher.