Patent ID: 9381530
Filing Date: 2016-07-05
CPC Classification: B05B,B65D

Claim Text:
1. A dispensing device for fluid substances, comprising; a pushbutton in which a chamber is provided, the chamber housing a piston, the piston being loaded by an elastic device to urge a front projecting appendix thereof into a dispensing hole for the substance, to hence sealedly close the dispensing hole, the pushbutton presenting a seat enabling a hollow stem to be coupled therethrough through which the pressurized substance is fed to the dispensing device, wherein in the chamber there is housed an at least partially cylindrical member, wherein the member frontally closes the chamber, and the member being in an interior of which the piston slides, in the member there being provided at least one passageway opening to a front of the piston and communicating with a bore of the stem when the dispensing device is positioned on the stem, such that the pressurized substance originating from the stem, by passing through the passageway, is configured to cause the piston to withdraw and hence free the hole, to dispense the substance, and wherein the piston presents a first sealing lip in proximity to its front portion and a guiding second lip extending from a rear portion of the piston, the at least partially cylindrical member being configured such that, when the piston is in an end-of-stroke position, the guiding second lip is internal to the member; and, wherein the piston presents in its rear portion a projection which rests on the end of the chamber when the piston is in its end-of-stroke position.