Patent ID: 9010372
Filing Date: 2015-04-21
Classification: F16K,Y10T

Abstract:
1. A changeover valve ( 1 ) comprising a valve housing ( 2 ) which has at least one inlet orifice ( 3 , 3 ′) and at least three outlet orifices ( 4 , 5 , 6 ), of which ( 4 , 5 , 6 ) in each case one of the outlet orifices can be selectively assigned to the at least one inlet orifice ( 3 , 3 ′) by a changeover shaft ( 7 ) guided displaceably in the valve housing ( 2 ), two sealing elements ( 8 , 9 ) are guided displaceably on the changeover shaft ( 7 ) between two drivers ( 10 , 11 ) and are held spaced apart from one another by at least one thrust element ( 12 ), a switching tube ( 13 ) guided displaceably in the valve housing ( 2 ) by two encircling guide ring surfaces ( 14 , 15 ) provided on a tube circumference thereof and the switching tube has at least one radial switching tube orifice ( 16 ) provided between the guide ring surfaces ( 14 , 15 ), an axial setting movement of the changeover shaft ( 7 ) is transmitted at least to one of the two sealing elements ( 8 , 9 ) such that either both of the sealing elements ( 8 , 9 ) bear with outer encircling sealing surfaces ( 18 , 19 ) thereof against counterpart sealing surfaces ( 22 , 23 ), which border a fluid passage ( 20 , 21 ), of the valve housing ( 2 ) and one of the sealing elements ( 8 , 9 ) includes an inner encircling sealing surface ( 24 , 25 ) that closes off an adjacent circumferential face edge of the switching tube ( 13 ) while the other sealing element ( 9 , 8 ) remains spaced apart from the other circumferential face edge, which serves as a fluid passage, of the switching tube ( 13 ), or both inner encircling sealing surfaces ( 24 , 25 ) of the sealing elements ( 8 , 9 ) bear against the adjacent circumferential edges of the switching tube ( 13 ) while one of the sealing element ( 8 , 9 ), by said outer encircling sealing surface ( 18 , 19 ) thereof, acts on an adjacent one of the counterpart sealing surfaces ( 22 , 23 ) which borders the fluid passage and the other sealing element ( 9 , 8 ) is spaced apart from the counterpart sealing surface ( 25 , 24 ) which is assigned thereto and which borders the fluid passage ( 21 , 20 ).