| 摘要 |
The dispensing valve 1 comprises, on the one hand, a hollow rod (2) having a cylindrical bore (38), along its axis (26), which opens to the exterior through a widened part carrying a circular seat (13) and, on the other hand, a cylindrical needle (4) comprising a solid body (11) mounted slidingly in the bore (38) of the rod (2) and prolonged, at one end, by an olive-shaped head (12) whose diameter is greater than the diameters of the body (11) and of the bore (38), in which the rod (2) and the needle (4) are subjected to the action of a spring (7) in the direction such that the olive-shaped head (12) bears in a fluid-tight manner on the seat (13), a helical passage (14, 15) being provided, for the fluid to be dispensed, at the interface between the needle (4) and the internal surface of the bore (38) of the rod (2). <IMAGE>
|
