US 11,052,414 B2
Valve for an end piece including a shut-off device
Géry Dambricourt, Escoutoux (FR)
Assigned to CEP TUBES, Saint-Remy-sur-Durolle (FR)
Appl. No. 15/762,524
Filed by CEP TUBES, Saint-Remy-sur-Durolle (FR)
PCT Filed Sep. 22, 2016, PCT No. PCT/FR2016/052408
§ 371(c)(1), (2) Date Jan. 30, 2019,
PCT Pub. No. WO2017/051127, PCT Pub. Date Mar. 30, 2017.
Claims priority of application No. 1558938 (FR), filed on Sep. 22, 2015; and application No. 1560098 (FR), filed on Oct. 22, 2015.
Prior Publication US 2019/0151874 A1, May 23, 2019
Int. Cl. B05B 11/00 (2006.01); B65D 47/20 (2006.01)
CPC B05B 11/0072 (2013.01) [B05B 11/007 (2013.01); B05B 11/0075 (2013.01); B05B 11/3001 (2013.01); B05B 11/3069 (2013.01); B65D 47/2031 (2013.01); B05B 11/3074 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A valve for an airless dispensing system, comprising a rigid outlet nozzle that defines a center and having:
a stem at the center of the nozzle defining an axis;
and a flap,
wherein:
the flap is in one piece and has a flexible wall situated facing a free end of the stem,
the flexible wall is perforated by an orifice that is concentric with the free end of the stem and has a surface which is opposite to the end of the stem,
the orifice of the flexible wall has a contour that is homothetic with the contour of the free end of the stem in a plane perpendicular to the axis of the stem,
the orifice of the flexible wall has an area smaller than a projected area of the free end of the stem in the plane,
the flap is connected to the nozzle by a non-deformable fixed connection,
when no action is exerted on the valve, the flexible wall presses in an airtight manner against the free end of the stem at all points of the surface of the flexible wall in contact with the free end of the stem, thereby ensuring the air tightness of the nozzle and preventing penetration of air in the dispensing system through the valve,
the pressing of the flexible wall against the free end of the stem is obtained by elastic deformation of the flexible wall, said elastic deformation resulting from the assembly of the flap and the nozzle, wherein
the flap is equipped with a hollow shaft, a first end of which is joined to a peripheral region of the flexible wall, the flap is fixed to the nozzle by the hollow shaft being fitted into the cavity, along the axis, an outer face of the hollow shaft and an inner face of a wall of the cavity describing a annular axisymmetric shape cooperating with one another, the outer face pressing in a leaktight manner against the inner face of the wall of the cavity, the stem being disposed inside the hollow shaft and an inner face of the hollow shaft pressing against the flank of the stem.