Patent ID: 9421564
Filing Date: 2016-08-23
CPC Classification: B05B

Claim Text:
1. A dispensing spray pump for a liquid storage bottle filled with a fluid preparation, comprising a piston body, a pump body, a plunger and a dispensing head, wherein: the piston body is fixable to a bottle mouth of the liquid storage bottle through a sealed cap, the piston body comprises a first piston and a second piston, which are barrel-shaped and arranged in an identical axial direction, the first piston is located inside the second piston, a bobbin of the first piston is in communication with an immersion tube, the ends of the first piston and the second piston are enclosingly connected to one another, and a chamber with an enclosed bottom is formed between the outer wall of the first piston and the inner wall of the second piston; the pump body comprises a first pump body and a second pump body, which are barrel-shaped and arranged in an identical axial direction, the first pump body is located inside the second pump body, the first pump body and the second pump body are fixedly connected to one another via a radial grid, and there is a fluid channel between an outer wall of the first pump body and an inner wall of the second pump body; the first piston and the second piston are slidable in the first pump body and the second pump body in a sealed manner, respectively, the first pump body is provided with a check valve, a first chamber is formed between the check valve and the first piston in the first pump body, the check valve can only open outward unidirectionally from the first chamber, the depth from a chamber mouth of the first chamber to the check valve is less than the maximum stroke of the first piston, the first piston is configured to lift the check valve when the first piston reaches top dead centre, a bobbin of the first pump body is inserted in the chamber between the second piston and the first piston, an external diameter of the first pump body is less than an inner diameter of the second piston, the second piston is slidable in the fluid channel located between the first pump body and the second pump body, and the chamber with the enclosed bottom is in communication with the fluid channel to form a second chamber; and an end of the plunger is fixedly inserted in the other end of the second pump body that is corresponding to the second piston, and the plunger is provided with a communicating hole that is in communication with the second chamber.