Hand held oral irrigator

• US 8,113,832 B2
• Filed: 12/11/2006
• Issued: 02/14/2012
• Est. Priority Date: 12/31/2002
• Status: Active Grant

• Current Assignee: Water Pik Incorporated (Church & Dwight Company Incorporated)
• Original Assignee: Water Pik Incorporated (Church & Dwight Company Incorporated)
• Inventors: Snyder, Clifford J., Sokol, Gary L., Callaghan, Roberta L.
• Primary Examiner(s): LEWIS, RALPH A
• Application Number:
  US11/609,224
• Publication Number:
  US 20070105065A1
• Time in Patent Office: 1,891 Days
• Field of Search: 433/80, 433/82, 433/89, 601/162, 222/372, 222/381.1, 222/384, 222/385, 222/383.1, 239/332, 239/233, 607/2, 607/9, 607/11, 607/14, 607/17, 607/42
• US Class Current: 433/80
• CPC Class Codes: A61C 17/02 Rinsing or air-blowing devices, e.g. using fluid jets or comprising liquid medication combined with receptacles for spittle A61C17/14; combined with power-driven cleaning or polishing devices A61C17/16
• CPC Class Codes: A61C 17/0202 Hand-pieces
• CPC Class Codes: A61C 17/032 using pressurised tap-water , e.g. rinsing devices specially adapted for being connected to the main water supply

Abstract

According to one broad aspect of one embodiment of the present invention, disclosed herein is a hand held oral irrigation device having a tip for dispensing fluids. In one example, an oral irrigation device includes a body portion, and a reservoir for storing fluids, wherein the body and/or the reservoir define a first major diameter at a lower end of the oral irrigation device, and define a second major diameter at an upper end of the oral irrigation device, the first major diameter being larger than the second major diameter. In this example, by providing such a geometry for the device, a user can grasp the device with one hand about the second major diameter during use. In another example, the body includes a pump for pumping fluids from the reservoir to the tip, wherein the pump includes an inlet valve and an outlet valve, the inlet valve including a reed valve made of flexible fabric material. The outlet valve may also include a reed valve made of flexible fabric material.

Claims

1. A hand-held oral irrigation device, comprising a body comprising a body top surface;

a body bottom surface; and

at least one body sidewall connecting the body top surface and the body bottom surface;

a tip detachably connected to the body;

a reservoir for storing a fluid removably coupled with the body;

a pump contained within the body and operative to draw the fluid from the reservoir, through the body bottom surface, and propel the fluid to the tip, the pump comprising

an interior fluid channel disposed between the tip and the reservoir;

a first valve regulating fluid flow into the interior channel from the reservoir, the first valve comprising

a first rim defined on a portion of a perimeter of the first valve;

a first flap portion extending into a space defined by an interior edge of the first rim so as to define a crescent-shaped opening between the first flap portion and the first rim; and

a first hinge portion between the first flap portion and the first rim, the first hinge portion configured to allow the first flap portion to move relative to the first rim;

a second valve regulating fluid flow from the interior channel to the tip, the second valve comprising

a second rim defined on a portion of a perimeter of the second valve;

a second flap portion extending into a space defined by an interior edge of the second rim so as to define a crescent-shaped opening between the second flap portion and the second rim;

a second hinge portion between the second flap portion and the second rim, the second hinge portion being configured to allow the first flap portion to move relative to the first rim;

a pump body defining a chamber in fluid communication with the interior fluid channel;

a piston positioned within the chamber of the pump body, wherein when the piston moves downwards within the chamber the first valve is open and the second valve is closed, and when the piston moves upwards within the chamber the second valve is open and the first valve is closed;

a pump gear comprising

a first disc portion; and

a second disc portion extending from the first disc portion, wherein the second disc portion is offset relative to a center axis of the first disc portion;

a gear pin coaxial with an axis of the first disc portion and about which the pump gear rotates; and

a connecting rod comprising

a ball end, wherein the ball end is operatively connected to the piston; and

a cylindrical end, wherein the cylindrical end is operatively connected to the second disc portion;

wherein when the pump gear rotates, the ball end moves in an upward and downward motion within the chamber.

2. The hand-held oral irrigation device of claim 1, wherein the tip is detachably connected to the body top surface.

3. The hand-held oral irrigation device of claim 2, wherein

the reservoir comprises

a reservoir base;

a reservoir vertical support adjacent the reservoir base;

a fluid chamber at least partially defined by the reservoir base and the reservoir vertical support;

and the body bottom surface detachably rests against the reservoir base when the body is coupled to the reservoir.

4. The hand-held oral irrigation device of claim 3, wherein a longitudinal axis of the tip is substantially parallel to a longitudinal axis of the body and a longitudinal axis of the reservoir.

5. The hand-held oral irrigation device of claim 1, wherein the body is detachably connected to the reservoir.

6. The hand-held oral irrigation device of claim 5, wherein the pump is situated between the tip and reservoir.

7. The hand-held oral irrigation device of claim 1, further comprising

an inlet channel formed in the reservoir and operative to convey fluid from the reservoir to the pump;

a seal adjacent the inlet channel, the seal selectively preventing fluid from flowing through the inlet channel; and

an inlet conduit operably connected to the pump and, when the body is coupled with the reservoir, the inlet conduit opens the seal and permits fluid flow through the inlet channel.

8. The hand-held oral irrigation device of claim 7, wherein the seal comprises

a stopper element;

and

a biasing element operative to bias the stopper to close the inlet channel.

9. The hand-held oral irrigation device of claim 8, wherein

the stopper element is a sphere;

and

the biasing element is a spring.

10. The hand-held oral irrigation device of claim 8, wherein the inlet conduit comprises a tip configured to engage the stopper element, the tip defining a slot configured to allow fluid to enter the inlet channel when the tip engages the stopper element.

11. The hand-held oral irrigation device of claim 7, wherein the seal remains open during operation of the pump.

12. The hand-held oral irrigation device of claim 1, wherein when the first valve is open, the second valve is closed and fluid is drawn from the reservoir into the chamber of the pump body.

13. The hand-held oral irrigation device of claim 1, wherein the first valve further comprises at least one first stress aperture operatively connected to the first hinge portion.

14. The hand-held oral irrigation device of claim 1, wherein the second valve further comprises at least one second stress aperture operatively connected to the second hinge portion.

15. A hand-held oral irrigation device comprising

a body defining a body chamber having a body bottom surface and a body top surface;

a tip detachably connected to the body top surface;

a reservoir for storing a fluid removably coupled with the body

a pump contained within the body chamber and operative to draw the fluid from the reservoir through the body bottom surface and propel the fluid to the tip, the pump including

an interior fluid channel disposed between the tip and the reservoir;

a first valve regulating fluid flow into the interior channel from the reservoir;

a second valve regulating fluid flow from the interior channel to the tip;

a pump body defining a chamber in fluid communication with the interior fluid channel; and

a piston positioned within the chamber of the pump body, wherein when the piston moves downwards within the chamber the first valve is open and the second valve is closed, and when the piston moves upwards within the chamber the second valve is open and the first valve is closed;

a pump gear comprising

a first disc portion; and

a second disc portion extending from the first disc portion, wherein the second disc portion is offset relative to a center axis of the first disc portion;

a gear pin coaxial with an axis of the first disc portion and about which the pump gear rotates; and

a connecting rod comprising

a ball end, wherein the ball end is operatively connected to the piston; and

a cylindrical end, wherein the cylindrical end is operatively connected to the second disc portion;

wherein when the pump gear rotates, the ball end moves in an upward and downward motion within the chamber.

16. A portable oral irrigator comprising

a body defining a body chamber having a body bottom surface and a body top surface;

a tip detachably connected to the body top surface;

a reservoir for storing a fluid removably coupled with the body;

a pump contained within the body chamber and operative to draw the fluid from the reservoir through the body bottom surface and propel the fluid to the tip and including

a pump body defining a chamber;

a piston positioned within the chamber of the pump body;

a pump gear comprising

a first disc portion; and

a second disc portion extending from the first disc portion, wherein the second disc portion is offset relative to a center axis of the first disc portion;

a gear pin coaxial with an axis of the first disc portion and about which the pump gear rotates; and

a connecting rod comprising

a ball end, wherein the ball end is operatively connected to the piston; and

a cylindrical end, wherein the cylindrical end is operatively connected to the second disc portion;

wherein when the pump gear rotates, the ball end moves in an upward and downward motion within the chamber;

a reservoir inlet channel formed in the reservoir and operative to convey fluid from the reservoir to the pump chamber;

a reservoir valve adjacent the reservoir inlet channel, the reservoir valve selectively preventing fluid from flowing through the inlet channel;

a pump inlet conduit operably connected to the pump and when the body is coupled with the reservoir, the pump inlet conduit opens the reservoir valve and permits fluid to flow through the reservoir inlet channel; and

an interior channel contained within the body and operative to convey fluid from the reservoir inlet channel to the tip;

a pump inlet valve disposed within the interior channel comprising

an inlet rim defined on a portion of a perimeter of the pump inlet valve;

an inlet flap extending into a space defined by an interior edge of the inlet rim and defining a u-shaped opening between the inlet flap and the inlet rim;

an inlet hinge operably connecting the inlet flap to the inlet rim and being configured to allow the inlet flap to move relative to the inlet rim; and

at least one inlet stress aperture operatively connected to the inlet hinge;

wherein the pump inlet valve prevents fluid from the reservoir from entering into the interior channel when the pump is in a first state and allows fluid from the reservoir to enter the interior channel when the pump is a second state;

a pump outlet valve disposed within the interior channel comprising

an outlet rim defined on a portion of a perimeter of the pump outlet valve;

an outlet flap extending into a space defined by an interior edge of the outlet rim and defining a u-shaped opening between the outlet flap and the outlet rim;

an outlet hinge operably connecting the outlet flap to the outlet rim and being configured to allow the outlet flap to move relative to the outlet rim; and

at least one outlet stress aperture operatively connected to the outlet hinge;

wherein the pump outlet valve allows fluid from the interior channel to flow to the tip when the pump is in the first state and prevents fluid to flow from the interior channel to the tip when the pump is the second state;

wherein

when the piston moves downwards within the chamber the pump inlet valve is open and the pump outlet valve is closed, and when the piston moves upwards within the chamber the pump outlet valve is open and the pump inlet valve is closed.