| 主权项 |
1. Manually operated pump for dispensing a fluid substance contained inside a container to which said pump can be associated, the pump comprising a cup-shaped body provided on its bottom with an opening that can be associated with a drawing tube inside said container and with a spherule housed in a first seat adapted to act as a suction valve, a piston being sealingly slidable inside the cup-shaped body in opposition to a return spring, a hollow stem being extended from such piston, one end of such stem projecting towards the exterior of the cup-shaped body, the hollow stem housing in a second seat a movable element of a delivery valve loaded by a spring, the pump having a bottom or ring nut for fixing to said container, the bottom or ring nut being provided with a hole through which said stem passes and with means for coupling with said cup-shaped body, characterized in that the movable element of the delivery valve has an at least partially conical surface adapted to be coupled with a corresponding surface of said second seat, in a manner such that due to the action of said spring, the movable element can be fit in said second seat. |
