公开(公告)号：US11826214B2

公开(公告)日：2023-11-28

申请号：US16877081

申请日：2020-05-18

Applicant: WATER PIK, INC.

Inventor： Harold A Luettgen ,  Oscar Senff ,  Brian Woodard ,  Blaine Hanson ,  Jonathan Huber

IPC: A61C17/02 ,  F04B17/03 ,  F04B19/22 ,  F04B23/02 ,  F04B53/14 ,  F04B53/16 ,  A61C17/028

CPC classification number: A61C17/0202 ,  F04B17/03 ,  F04B19/22 ,  F04B23/02 ,  F04B53/14 ,  F04B53/16 ,  A61C17/028

Abstract: In one embodiment, an oral irrigator including a reservoir, a tip fluidly connected to the reservoir, a motor having a drive shaft, and a pump. The pump includes a pump body including a pump inlet fluidly connected to the reservoir and a pump outlet fluidly connected to the tip, a spiral pinion gear including a plurality of pinion gear teeth that curve along their length, and a spiral driven gear including a plurality of driven gear teeth that mesh with the pinion gear teeth. The pump also may include a connecting rod eccentrically connected to the driven gear and a piston and received within the pump body. Movement of the drive shaft causes the pinion gear to rotate, causing the driven gear to rotate, translating the connecting rod and moving the piston laterally within the pump body to pull fluid from the reservoir and push the fluid to the tip.