| 摘要 |
PCT No. PCT/EP83/00165 Sec. 371 Date Feb. 28, 1984 Sec. 102(e) Date Feb. 28, 1984 PCT Filed Jun. 29, 1983 PCT Pub. No. WO84/00140 PCT Pub. Date Jan. 19, 1984.A dispenser for paste-like products comprises a headpiece including a discharge channel with a dispensing orifice, and a pump chamber the volume of which changes with the application of an external load and which is connected by a communication path, sealed by a check valve which can only open in the direction of the dispensing orifice, to said discharge channel, and said headpiece is connected to a container, the end of the container away from the headpiece being provided with an opening inside which is located a piston sliding in sealing engagement along the container interior wall, said connection between the headpiece and the container possibly being detachable. The interior of the container communicates with the pump chamber by a check valve, which can only open in the direction of the pumping chamber and which is mounted in a support base extending between the pump chamber and the container interior. The check valve between the pump chamber and the container includes a valve seat in the form of a conical element tapering toward the pump chamber and connected by bridges to the support base and surrounded by a number of passageways between the bridges. Furthermore, the check valve includes as its closure member a flexible apertured disk mounted coaxially with the conical element and held at its radial outer area on the support base while in the closed position it rests in sealing engagement of its inner rim with the surface of the conical element whereby it covers the passageways. |
