Adjustable flow regulator for dental water jet

• US 8,408,483 B2
• Filed: 06/25/2010
• Issued: 04/02/2013
• Est. Priority Date: 02/24/2006
• Status: Active Grant

• Current Assignee: Water Pik Incorporated (Church & Dwight Company Incorporated)
• Original Assignee: Water Pik Incorporated (Church & Dwight Company Incorporated)
• Inventors: Boyd, Brian, Williams, Brian R., Taylor, Kurt M.
• Primary Examiner(s): Ganey, Steven J
• Application Number:
  US12/823,983
• Publication Number:
  US 20100266980A1
• Time in Patent Office: 1,012 Days
• Field of Search: 239/69, 239/124, 239/127, 239/525, 239/570, 239/571, 239/583, 239/586, 239/332, 433/80, 433/82, 433/84, 433/87, 601/162
• US Class Current: 239/525
• CPC Class Codes: A61C 1/0084 Supply units, e.g. reservoir arrangements, specially adapted pumps
• CPC Class Codes: A61C 1/0092 Pumps specially adapted therefor
• 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 17/0205 Container filling apparatus
• CPC Class Codes: A61C 17/028 with intermittent liquid flow
• CPC Class Codes: A61C 19/02 Protective casings, e.g. boxes for instruments; Bags A61C5/44 takes precedence
• CPC Class Codes: A61H 13/005 Hydraulic gum massage
• CPC Class Codes: F04B 49/24 Bypassing

Abstract

A dental water jet apparatus for adjusting a pressurized water stream from a pump to a tip moves pressurized water from a reservoir to a tip in fluid communication with the pump. A flow control knob may be turned to selectively adjust the water pressure supplied by the tip between a minimum and a maximum value. When the flow control knob is turned in a first direction, the volume of fluid directed towards the tip decreases and the volume of fluid returned to an inlet of the pump increases. Fluid may flow from the reservoir and ultimately into the tip to provide oral irrigation and/or cleaning of the teeth, gums, and tongue.

Claims

1. An apparatus for adjusting a fluid pressure supplied by a pump to a nozzle tip of a dental water jet device, comprising

a pump body defining a fluid chamber;

a flow control rotatably connected to the pump body;

a flow regulation conduit at least partially defined by the flow control;

a bypass valve in fluid communication with the fluid chamber and the flow regulation conduit;

a fluid passage between the fluid chamber and the nozzle tip;

wherein

the pump body and the flow control together define a return channel in fluid communication with the flow regulation conduit;

a depth of the flow regulation conduit proximate the bypass valve may be varied by selectively moving the flow control relative to the pump body; and

varying the depth of the flow regulation conduit varies a fluid pressure within the fluid passage.

2. The apparatus of claim 1 further comprising a reservoir in fluid communication with the fluid chamber.

3. The apparatus of claim 2, wherein the reservoir is in fluid communication with the return channel.

4. The apparatus of claim 1, wherein the fluid pressure within the fluid passage increases as the depth of the fluid regulation conduit proximate the bypass valve decreases.

5. The apparatus of claim 1 further comprising

a pump inlet body connected to the pump body, wherein

the pump inlet body and the pump body together define a fluid return chamber in fluid communication with the return channel.

6. The apparatus of claim 1 further comprising a reed valve in fluid communication with the tip and the fluid passage, wherein the reed valve substantially prevents fluid flow in a direction from the nozzle tip to the pump.

7. A dental water jet device comprising

a pump comprising

a pump body defining a chamber;

a pump inlet connected to a first end of the pump body; and

a pump outlet connected to a second end of the pump body;

a reservoir in fluid communication with the pump inlet;

a handheld jet tip in fluid communication with the pump outlet;

a flow control regulator attached to the pump body;

a return channel defined by the flow control regulator and the pump body, wherein the return channel selectively connects the reservoir with the pump outlet and the flow control regulator variably adjusts a volume of fluid that flows through the return channel; and

a handle passage fluidly connecting the handheld jet tip and the pump outlet.

8. The dental water jet device of claim 7 further comprising

a flow regulation conduit defined by the flow control regulator that fluidly connects the return channel and the pump outlet, wherein

the flow control regulator selectively changes the dimensions of the flow regulation conduit.

9. The dental water jet device of claim 8, wherein changing the dimensions of the flow regulation conduit varies a fluid pressure within the handle passage.

10. The dental water jet device of claim 9, wherein the fluid pressure within the handle passage increases as the dimensions of the flow regulation conduit decrease.

11. The dental water jet device of claim 9 further comprising a bypass valve allowing fluid flow in two directions, wherein the bypass valve is disposed between the flow regulation conduit and the pump outlet.

12. The dental water jet device of claim 7 further comprising a one-way valve disposed in the handle passageway that prevents fluid flow from the handle to the pump outlet.

13. The dental water jet device of claim 7 further comprising a reservoir valve disposed between the reservoir and the pump inlet that selectively connects the reservoir to the pump inlet.

14. The dental water jet device of claim 7 further comprising a check valve disposed in the chamber, wherein the check valve selectively connects the pump inlet and the chamber.

15. The dental water jet of device claim 14, wherein the check valve further comprises

a cap selectively blocking fluid flow from the pump inlet to the chamber;

a spring operatively connected to the cap; and

a ball operatively connected to the spring and disposed between the pump outlet and the spring, wherein

when the ball is in a first position, the cap fluidly connects the pump inlet and the chamber, and

when the ball is in a second position, the cap substantially prevents fluid flow from the pump inlet to the chamber.

16. The dental water jet device of claim 15, wherein the handle further comprises

a nozzle tip fluidly connected to the handle passageway;

and

a pause button, wherein

when the pause button is in a first state, fluid flows from pump outlet to the nozzle tip, and

when the pause button is in a second state, fluid is prevented from flowing from the pump outlet to the nozzle tip.

17. The dental water jet device of claim 16, wherein when the pause button is the second state, the check valve moves to the first position.

18. A dental water jet device comprising

a base unit defining a cavity;

a pump contained within the cavity;

a reservoir in fluid communication with the pump;

a nozzle tip in fluid communication with the pump;

a flow control regulator connected to the pump and defining a channel of variable volume, wherein the flow control regulator varies a volume of the channel to selectively adjust a fluid pressure supplied to the nozzle tip; and

a reed valve located within the base unit in a flow path between the pump and the nozzle tip, wherein

the reed valve allows a flow of a fluid from the pump to the tip and prevents the fluid from flowing from the tip to the pump; and

when the flow regulator decreases the fluid pressure, the flow of the fluid through the reed valve decreases.

19. The dental water jet device of claim 18, wherein the pump includes a fluid outlet containing the reed valve.