Patent ID: 7886769

Claim:
A diverter valve ( 1 ) having an improved transition at the connecting branches, comprising a housing having one inlet port ( 2 ) and a first outlet port ( 3 ) and a second outlet port ( 4 ), the second outlet port ( 4 ) formed at an angle with respect to the first outlet port ( 3 ), the inlet port ( 2 ) having a bore axis, and a cylindrical rotary valve ( 5 ) rotatable within the housing, the cylindrical rotary valve ( 5 ) comprising a straight inner pipe having a bore ( 14 ) defining an inlet and an outlet of the valve, said bore ( 14 ) connecting the inlet port ( 2 ) to either of the first or second outlet ports ( 3 , 4 ) to provide through-flow positions of the valve ( 5 ), wherein in the region of the inlet port ( 2 ) and of the first outlet port ( 3 ), two pocket-like shaped recessed surfaces ( 11 , 11 a , 12 , 12 a ,) are formed on the housing, and in the region of the second outlet port ( 4 ), only one pocket-like shaped recessed surface ( 13 ) is formed on the housing, the rotary valve ( 5 ) including pairs of pocket-like shaped recessed surfaces ( 9 , 9 a , 10 , 10 a ) in the inner surface of the valve ( 5 ) and positioned at the inlet and outlet of the valve ( 5 ), each of the pairs of the recessed surfaces in the valve ( 5 ) being mirror-symmetrical relative to the longitudinal plane when the valve is in a through-flow position, the pairs of recessed surfaces on the housing and valve facilitating movement of material through the diverter valve ( 1 ) at each through-flow position of the valve ( 5 ).