US 11,719,237 B2
Pumping assembly, piston pump and water flosser
Yong Tang, Guangdong (CN); and Xiao Liu, Guangdong (CN)
Assigned to FLY CAT ELECTRICAL CO., LTD., Shenzhen (CN)
Filed by FLY CAT ELECTRICAL CO., LTD., Guangdong (CN)
Filed on Oct. 28, 2022, as Appl. No. 17/975,703.
Prior Publication US 2023/0145178 A1, May 11, 2023
Int. Cl. F04B 53/14 (2006.01); A61C 17/028 (2006.01); F04B 53/16 (2006.01)
CPC F04B 53/143 (2013.01) [A61C 17/028 (2013.01); F04B 53/144 (2013.01); F04B 53/162 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A pumping assembly, comprising:
a cylinder, provided therein with at least two chambers with different inner diameters;
a piston mechanism, comprising a piston head and a separation groove provided on a sidewall of the piston head, wherein the piston head comprises a mating end and a connecting end that are successively extending through the at least two chambers, the mating end is in sealing cooperation with a wall of a chamber with a smaller inner diameter of the at least two chambers, and a gap being formed between a sidewall of the connecting end and a wall of a chamber with a larger inner diameter of the at least two chambers, the separation groove is provided with a bottom wall and a sidewall connected to the bottom wall;
the sidewall is arranged obliquely relative to the bottom wall, and a depth of the separation groove is ⅛ to ½ of a width of the separation groove; and
a drive mechanism connected to the piston mechanism, the drive mechanism being configured to drive the piston mechanism to move;
wherein a side of the mating end away from the drive mechanism is provided with an accommodating groove, and a wall of the accommodating groove is elastic.
 
6. A piston pump, comprising:
a pumping assembly, comprising:
a cylinder, provided therein with at least two chambers with different inner diameters;
a piston mechanism, comprising a piston head and a separation groove provided on a sidewall of the piston head, wherein the piston head comprises a mating end and a connecting end that are successively extending through the at least two chambers, the mating end is in sealing cooperation with a wall of a chamber with a smaller inner diameter of the at least two chambers, and a gap being formed between a sidewall of the connecting end and a wall of a chamber with a larger inner diameter of the at least two chambers, the separation groove is provided with a bottom wall and a sidewall connected to the bottom wall;
the sidewall is arranged obliquely relative to the bottom wall, and a depth of the separation groove is ⅛ to ½ of a width of the separation groove; and
a drive mechanism connected to the piston mechanism, the drive mechanism being configured to drive the piston mechanism to move;
wherein a side of the mating end away from the drive mechanism is provided with an accommodating groove, and a wall of the accommodating groove is elastic.
 
11. A water flosser, comprising:
a pumping assembly, comprising:
a cylinder, provided therein with at least two chambers with different inner diameters;
a piston mechanism, comprising a piston head and a separation groove provided on a sidewall of the piston head, wherein the piston head comprises a mating end and a connecting end that are successively extending through the at least two chambers, the mating end is in sealing cooperation with a wall of a chamber with a smaller inner diameter of the at least two chambers, and a gap being formed between a sidewall of the connecting end and a wall of a chamber with a larger inner diameter of the at least two chambers, the separation groove is provided with a bottom wall and a sidewall connected to the bottom wall;
the sidewall is arranged obliquely relative to the bottom wall, and a depth of the separation groove is ⅛ to ½ of a width of the separation groove; and
a drive mechanism connected to the piston mechanism, the drive mechanism being configured to drive the piston mechanism to move;
wherein a side of the mating end away from the drive mechanism is provided with an accommodating groove, and a wall of the accommodating groove is elastic.