Patent ID: 8240516
Filing Date: 2012-08-14
Classification: B05B

Abstract:
1. A device for dispensing a liquid to pasty product intended to be installed at an open end of a rigid container and including a manual metering pump for delivering a predetermined amount of said product to be dispensed, comprising: a base element intended to be installed via a lower end on the container by an attachment means; a push button having a dispensing spout mounted telescopically on an upper part of the base element and capable of pump action with respect to the base element, against a return member comprising an elastically deformable bellows for a sealed connection between firstly an internal chamber of the base element, which internal chamber is open toward the container in order for the product to pass through an opening, and secondly, at an upper end of said bellows, an internal chamber of the push button into which a hole in the dispensing spout opens, which hole is linked to opening-closing means made at the upper end of said bellows; and said opening-closing means comprising a first internal peripheral collar made at the upper end of the bellows, said collar being housed in an internal annular groove in the push button forming a chamber, and bearing against one internal wall thereof so that said collar grips elastically with a predetermined force in such a way as to provide a seal or to be lifted radially under a certain pressure of the product contained therein when the bellows is compressed, and thus enable the product to be transferred into the annular groove, said first collar being linked to a second collar of the bellows, said second collar being concentric with the first collar, being housed in the annular groove of the push button but bearing against an external wall thereof, into which the hole of the dispensing spout opens, said second collar being of a height such as not to close off said hole, the hole being opened or closed by a concave locking tongue which is part of the second collar and has a height and a width at least sufficient to close off the hole by pressing against the hole, or to free up the hole during a rotary action, in one direction or another, on said push button with respect to the base element and as a result with respect to the bellows and to the locking tongue, which remain stationary.