Abstract:
The invention relates to a device (1) for dispensing a product (L), comprising: an element for connection to a container (R) containing the product; a piston (3) that is stationary in relation to the connection element; a cylinder body that moves around the piston, thereby defining a dosing chamber (100), the piston comprising a dosing inlet (35) for said chamber and the apex (64) of the dosing chamber comprising an outlet of the dosing chamber; and an inflow non-return valve (5) with a membrane for opening or closing the dosing inlet, the piston being in two parts, one of which forms a sealing joint with the cylinder body, the piston and the inflow non-return valve forming separate parts and being arranged such that the membrane is tightly clamped to the top of the piston.
Abstract:
A device for withdrawing and dispensing a viscous product without taking in air is described. The device on the one hand includes a pumping member positioned, by its base, at the open end of a rigid container associated with a retractable flexible inner pouch, intended to receive the product, and on the other hand a plunger tube connected by its upper end to a corresponding part of the pumping member, such that the upper end is partially submerged in the product and the free lower end is completely submerged in the product, such that the plunger tube is made up of a first upper part, with a closed circumference, defining a reference section of the tube and a second lower part submerging the first, with a circumference open by at least one longitudinal slot, made along a generatrix and defining a C- or U-shaped section on that part of the tube.
Abstract:
A pump for dispensing a fluid, has a pump head, a piston body with a piston, a pump chamber limited by a pump chamber body, an inlet valve and an outlet valve, the piston being moveable by respective movement of the pump head between an upper starting position and a lower end position. A return stroke force for a return stroke from the lower end position into the upper starting position is provided by a bellows, formed by two bellows arranged one above the other, Each of the bellows is folded up, when moving the pump head into the lower end position, by exerting a compression force on the pump head, the first bellows receiving the compression force by direct engagement with the pump head, the second bellows receiving the compression force only by engagement with the first bellows.
Abstract:
A device for withdrawing and dispensing a viscous product includes a pumping member and a dip tube that includes an upper end connected to a corresponding portion of the pumping member. The dip tube includes a lower portion having a free lower end, with a circumference of the lower portion opened by at least one longitudinal slot formed parallel to a longitudinal axis of the dip tube, wherein the longitudinal slot forms a gutter with a bottom, the lower portion includes pins arranged inside the gutter and extending transversally to the longitudinal slot and away from the bottom of the gutter, the pins being dispatched along the longitudinal slot.