| 摘要 |
A dispensing valve comprising: a first tubular member closed at one end by a wall; a second tubular member telescopically housed in said first tubular member and closed at the opposite end by a wall; said second tubular member being slidable with respect to said first member from a rest position in which it is housed inside said first tubular member into abutment against its end wall, to a position in which it projects out of said first tubular member; a piston like member secured to the closure wall of said first tubular member and capable of slidingly penetrating with a close fit into the tubular passage of said second tubular member for a distance shorter than the maximum sliding stroke of said second tubular member with respect to said first tubular member; a first radial inlet port in said first tubular member at a position near its closed end, and a second radial outlet port in said second tubular member at a position in which said outlet port is wholly housed inside said first tubular member in the said rest position. |
