The present invention relates to an oral care implement, such as a toothbrush, having an oral care fluid dispensing mechanism.
It is known to provide an oral care implement, such as a toothbrush, with a reservoir storing an oral care fluid that is feedable to a fluid outlet at a head of the implement. One such known oral care implement has a pump mechanism for dispensing the oral care fluid that requires repeated actuation during dispensing in order to dispense a volume of the oral care fluid sufficient for the user to benefit from the effects of the oral care fluid. Since the dispensing is carried out while the oral care implement is held aloft with the fluid outlet within the user's oral cavity, such repeated actuation of the pump mechanism during dispensing is inconvenient, and can be tiresome and uncomfortable for the user.
There is a need for an oral care implement having an oral care fluid dispensing mechanism that is convenient to use and that is less tiresome and uncomfortable to operate during dispensing.
An embodiment of the present invention provides a first oral care implement, comprising: a body comprising a handle and a head at an end of the handle; the body having a cavity therein for storing an oral care fluid; the head having at least one oral care element extending therefrom, and a fluid outlet through which the oral care fluid is dispensable to an exterior of the oral care implement; a passageway fluidly connecting the cavity with the fluid outlet; a mechanism for introducing air into the cavity from the exterior of the oral care implement; and a control valve on the head movable relative to the head between a first position for preventing fluid flow from the cavity through the fluid outlet and a second position for permitting fluid flow from the cavity through the fluid outlet.
Optionally, the oral care implement comprises a movable wall in the cavity, the wall dividing the cavity into first and second reservoirs of variable volume, wherein the first reservoir is for storing the oral care fluid, and wherein the passageway fluidly connects the first reservoir with the fluid outlet.
Optionally, the body further defines a first opening fluidly connecting the second reservoir with the exterior of the oral care implement. Further optionally, the oral care implement comprises a first check valve for permitting air flow into the second reservoir from the exterior of the oral care implement via the first opening and for restricting air flow from the second reservoir to the exterior of the oral care implement via the first opening.
Optionally, the wall comprises a piston.
Optionally, the wall comprises a deformable vessel surrounding the first reservoir, wherein the vessel has an orifice in fluid communication with the passageway.
Optionally, the vessel is deformable according to a predetermined pattern of collapse. Optionally, the vessel comprises a bellows.
Optionally, at least a portion of the second reservoir surrounds the first reservoir.
Optionally, the oral care implement comprises a pump comprising a chamber and a second opening fluidly connecting the chamber with the exterior of the oral care implement, wherein the chamber is fluidly connected with the second reservoir via the first opening.
Optionally, the chamber is of variable volume, and the pump is operable to reduce the volume of the chamber when the second opening is blocked, thereby to push air from the chamber into the second reservoir via the first opening. Further optionally, the pump comprises flexible material defining the chamber.
Optionally, the pump comprises a second check valve for permitting air flow into the chamber from the exterior of the oral care implement via the second opening and for restricting air flow from the chamber to the exterior of the oral care implement via the second opening.
Optionally, the pump is at an opposite end of the handle from the head.
Optionally, the cavity is in the handle.
Optionally, the cavity is of fixed volume. Alternatively, the cavity is of variable volume. The handle may define the cavity and be compressible to reduce the volume of the cavity.
Optionally, the oral care implement comprises a third check valve for permitting flow from the cavity through the fluid outlet and for restricting flow through the fluid outlet towards the cavity.
Optionally, the passageway comprises a dip tube in the cavity.
Optionally, when the control valve is at the first position, the control valve blocks the fluid outlet.
Optionally, when the control valve is at the first position, the control valve blocks the passageway.
Optionally, the oral care implement comprises a biasing device that biases the control valve to the first position.
Optionally, the oral care fluid is stored in the cavity.
Optionally, the oral care fluid comprises one or more oral care agents selected from the group consisting of: antibacterial agents; oxidative or whitening agents; enamel strengthening or repair agents; tooth erosion preventing agents; tooth anti-sensitivity ingredients; gum health actives; nutritional ingredients; tartar control or anti-stain ingredients; enzymes; sensate ingredients; caries or plaque disclosing agents; flavors or flavor ingredients; breath freshening ingredients; oral malodor reducing agents; anti-attachment agents or sealants; diagnostic solutions; occluding agents, dry mouth relief ingredients; catalysts to enhance the activity of any of these agents; colorants or aesthetic ingredients; and combinations thereof.
Optionally, the oral care fluid is stored in the cavity with a propellant.
Optionally, the propellant comprises a liquefied gas; optionally wherein the liquefied gas comprises one or more of propane, butane, isobutene, dimethyl ether, and a hydroflurocarbon, or a mixture of any two or more thereof.
Optionally, the propellant comprises a compressed gas; optionally wherein the compressed gas comprises one or more of nitrogen, carbon dioxide, nitrous oxide, and compressed air, or a mixture of any two or more thereof.
Optionally, the oral care implement comprises a toothbrush.
Optionally, the head is a first head, and the control valve comprises a second head movably connected to the first head and having at least one oral care element extending therefrom, wherein the second head is movable relative to the first head between a first position for preventing fluid flow through the fluid outlet and a second position for permitting fluid flow through the fluid outlet.
Optionally, the head has at least one wall defining the fluid outlet, and the control valve comprises a deformable member extending through the fluid outlet, wherein the control valve is movable relative to the head between a first position for preventing fluid flow through the fluid outlet and a second position for permitting fluid flow through the fluid outlet between the deformable member and the wall.
Another embodiment of the present invention provides a second oral care implement, comprising: a body comprising a handle and a head at an end of the handle; the body having a cavity therein for storing an oral care fluid; the head having at least one oral care element extending therefrom, and at least one wall defining a fluid outlet through which the oral care fluid is dispensable to an exterior of the oral care implement; a passageway fluidly connecting the cavity with the fluid outlet; and a control valve comprising a deformable member extending through the fluid outlet, wherein the control valve is movable relative to the head between a first position for preventing fluid flow through the fluid outlet and a second position for permitting fluid flow through the fluid outlet between the deformable member and the wall.
Optionally, in either of the first and second oral care implements, a proximal end of the deformable member is anchored in the head.
Optionally, in either of the first and second oral care implements, the deformable member comprises a deformable finger.
Optionally, in either of the first and second oral care implements, the control valve comprises a flange extending around at least a portion of a perimeter or circumference of the deformable member. Further optionally, the flange blocks the fluid outlet when the control valve is at the first position; optionally wherein the flange is in contact with a side of the head in which the fluid outlet is formed when the control valve is at the first position.
Optionally, in either of the first and second oral care implements, the deformable member comprises a tooth cleaning or polishing element.
Optionally, in either of the first and second oral care implements, the deformable member is resilient.
A further embodiment of the present invention provides a third oral care implement, comprising: a body comprising a handle and a first head at an end of the handle; the body having a cavity therein for storing an oral care fluid; the first head having at least one oral care element extending therefrom, and a fluid outlet through which the oral care fluid is dispensable to an exterior of the oral care implement; a passageway fluidly connecting the cavity with the fluid outlet; and a control valve comprising a second head movably connected to the first head and having at least one oral care element extending therefrom, wherein the second head is movable relative to the first head between a first position for preventing fluid flow through the fluid outlet and a second position for permitting fluid flow through the fluid outlet.
Optionally, in either of the first and third oral care implements, the first and second heads are connected to each other by a hinge, such as a living hinge.
Optionally, in either of the first and third oral care implements, the oral care elements extend from respective first sides of the first and second heads, and the oral care implement comprises a flexible pad connecting respective second sides of the first and second heads, wherein the second sides of the heads are opposite from the first sides of the heads.
Optionally, in either of the first and third oral care implements, the flexible pad is comprised in a soft tissue cleaner of the oral care implement. Further optionally, the soft tissue cleaner comprises one or more projections extending from the flexible pad.
Optionally, in either of the first and third oral care implements, the second head comprises a stopper that is located in the fluid outlet when the second head is at the first position; optionally wherein the stopper is a resilient stopper.
Further areas of applicability of the present invention will become apparent from the detailed description provided hereinafter. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.
The present invention will become more fully understood from the detailed description and the accompanying drawings, wherein:
The following description of the preferred embodiment(s) is merely exemplary in nature and is in no way intended to limit the invention, its application, or uses.
As used throughout, ranges are used as shorthand for describing each and every value that is within the range. Any value within the range can be selected as the terminus of the range. In addition, all references cited herein are hereby incorporated by referenced in their entireties. In the event of a conflict in a definition in the present disclosure and that of a cited reference, the present disclosure controls.
In the following description, each of the exemplary embodiments of the oral care implement of the invention comprises a manually-operated oral care implement, more specifically a manually-operated toothbrush. However, in variations to these embodiments, the oral care implement could instead comprise a powered oral care implement, such as a powered toothbrush, wherein one or more oral care elements provided to the head of the implement are drivable so as to be moved relative to the handle of the implement. In still further embodiments, the oral care implement could instead comprise other forms of oral care implement, such as a soft-tissue cleaner, a tooth polisher, an interdental brush, a tongue scraper, or another implement designed for oral care. It is to be understood that other embodiments may be utilised, and that structural and functional modifications may be made without departing from the scope of the present invention.
The oral care elements 200 extend from a first, front side of the toothbrush 1, more specifically from a first, front side 123 of the head 120, and are for cleaning or polishing surfaces in a user's mouth, such as surfaces of their teeth. As used herein, the term “oral care element” is used in a generic sense to refer to any structure that can be used to clean, massage or polish an oral surface, such as teeth or soft tissue, through relative surface contact. In this embodiment, the oral care elements comprise a plurality of tooth cleaning elements, preferably a plurality of flexible bristles arranged in tufts. However, in variations to this embodiment, the oral care elements may additionally or alternatively comprise one or more tooth polishing elements, preferably in the form of elastomeric tooth polishing elements, such as elastomeric protrusions, elements, fingers, or prophylactic (prophy) cups. In some embodiments, the oral care elements 200 may comprise at least one of any one or more of the following, without limitation: bristles, rigid bristles, flexible bristles, filament bristles, fibre bristles, nylon bristles, polybutylene terephthalate (PBT) bristles, tapered bristles, spiral bristles, rubber bristles, elastomeric protrusions, elastomeric elements, flexible polymer protrusions, co-extruded filaments, flag bristles, crimped bristles, anti-bacterial bristles and combinations thereof and/or structures containing such materials or combinations. The head 120 also comprises or defines the fluid outlet 125 at the first, front side 123 of the head 120. The fluid outlet 125 will be described in more detail below.
In a variation to the illustrated embodiment, a soft tissue cleaner may be provided on a second side of the toothbrush 1, such as a second, rear side of the toothbrush 1 opposite to the front side of the toothbrush 1. Such a soft tissue cleaner may be provided on a second, rear side 124 of the head 120.
The handle 110 is a proximal portion of the body 100 and has the distal end 112 and the proximal end 111, which proximal end 111 forms the proximal end 101 of the body 100. The handle 110 includes a neck portion 118 by which the handle 110 is connected with the head 120. The neck portion 118 is generally of a smaller cross sectional area than the rest of the handle 110. The neck portion 118 includes the distal end 112 of the handle 110, which is that portion of the handle 110 fixed to and closest to the proximal end 121 of the head 120. In the illustrated embodiment, the head 120 is non-detachable from the handle 110. However, in variations to the illustrated embodiment, the head 120 may be detachable from the handle 110, such as for replacement of the head 110 when the oral care elements 200 become worn.
The handle 110 provides a user with a mechanism by which he/she can readily grip and manipulate the toothbrush 1, includes ergonomic features which provide a high degree of control for the user while maintaining comfort, and may be formed of many different shapes and with a variety of constructions. Although the handle 110 is a non-linear structure in the illustrated embodiment, the invention is not so limited, and in certain embodiments the toothbrush 1 may have a simple linear handle 110. In the illustrated embodiment, the toothbrush 1 comprises a thumb grip surface 115 on the first, front side of the toothbrush 1, more specifically on a first, front side 113 of the handle 110. On a second, rear side of the toothbrush 1, more specifically on a second, rear side of the handle 110, the toothbrush 1 may comprise a second grip surface. During use of the toothbrush 1, a user most comfortably holds the toothbrush 1 with the handle 110 lying in the palm of their hand, with their thumb on the thumb grip surface 115, and with their index and/or middle finger on the second grip surface.
As shown in
Inside the cavity 400 is a movable wall in the form of a piston 410, which divides the cavity 400 into first and second reservoirs 401, 402 of variable volume. That is, the piston 401 isolates the first reservoir 401 from the second reservoir 402. The first reservoir 401 stores an oral care fluid, and the second reservoir 402 is for pre-pressurizing the oral care fluid in the first reservoir 401, as will be described below.
Preferably, the oral care fluid comprises one or more oral care agents. Any suitable oral care agent(s) can be used in the present invention. In the illustrated embodiment, the oral care fluid is a mouthwash comprising one or more antibacterial agents, flavors or flavor ingredients, and breath freshening ingredients. However, in variations to the illustrated embodiment, the oral care fluid comprises one or more oral care agents selected from the group consisting of: antibacterial agents; oxidative or whitening agents; enamel strengthening or repair agents; tooth erosion preventing agents; tooth anti-sensitivity ingredients; gum health actives; nutritional ingredients; tartar control or anti-stain ingredients; enzymes; sensate ingredients; caries or plaque disclosing agents; flavors or flavor ingredients; breath freshening ingredients; oral malodor reducing agents; anti-attachment agents or sealants; diagnostic solutions; occluding agents, dry mouth relief ingredients; catalysts to enhance the activity of any of these agents; colorants or aesthetic ingredients; and combinations thereof. In some embodiments, the oral care fluid comprises more than one of the oral care agents listed in the preceding sentence. The oral care fluid preferably is free of (i.e., is not) toothpaste. Preferably, the oral care fluid is intended to provide supplemental oral care benefits in addition to merely brushing one's teeth. The oral care fluid may be for enhancing the performance of dentifrice, to provide synergistic benefits.
With continuing reference to
Between the cavity 400 and the fluid outlet 125, the toothbrush 1 comprises a check valve 340 (herein referred to as the “third check valve”, for ease of reference only) in the passageway 330 for permitting fluid flow from the first reservoir 401 towards the fluid outlet 125 and for restricting or preventing fluid flow from the fluid outlet 125 towards the first reservoir 401. The third check valve 340 helps avoid salvia and used dentifrice migrating from the oral care elements 200 to the first reservoir 401. In a variation to the illustrated embodiment, the third check valve 340 is omitted.
The head 120 further comprises a control valve 600 that is movable between a first position for preventing fluid flow from the cavity 400, and more specifically from the first reservoir 401, through the fluid outlet 125 and a second position for permitting fluid flow from the cavity 400, and more specifically from the first reservoir 401, through the fluid outlet 125. The control valve is best understood with reference to
The control valve 600 comprises a deformable member 610 that extends through the fluid outlet 125. In the illustrated embodiment, the flexible member 610 is flexible and resilient. The deformable member 610 may be formed of an elastomeric material, such as an elastomer, a thermoplastic elastomer (TPE), or styrene-ethylene/butylene-styrene (SEBS). In the illustrated embodiment, the deformable member 610 comprises a deformable finger 610 but, in variations to the illustrated embodiment, the deformable member may instead comprise a deformable panel or a deformable member of another shape. The deformable member 610 has a proximal end 612 anchored within the head 120 and a distal end 614 located between the oral care elements 200. In the illustrated embodiment, the distal end 614 of the deformable member 610 is at about the same height above the front side 123 of the head 120 as the oral care elements 200. In variations to the illustrated embodiment, the distal end 614 of the deformable member 610 may be at a lesser height above the front side 123 of the head 120 than some or all of the oral care elements 200, and/or the distal end 614 of the deformable member 610 may be at a greater height above the front side 123 of the head 120 than some or all of the oral care elements 200. The control valve 600 also comprises a flange 616 extending from the deformable member 610. In the illustrated embodiment, the flange 616 extends around the full perimeter or circumference of the deformable member 610, but in variations to the illustrated embodiment the flange 616 extends around only a portion of the perimeter or circumference of the deformable member 610.
The presence of the deformable member 610 in the fluid outlet 125 does not itself block the fluid outlet 125 when the control valve 600 is at the first position, since there is space between the deformable member 610 and a wall of the head 120 that defines the fluid outlet 125. However, the flange 616 is in contact with the front side 123 of the head 120 and blocks the fluid outlet 125, as shown in
During use of the toothbrush 1 in an oral care session, a force applied to the deformable member 610 by a surface in a user's oral cavity, such as their teeth or tongue, causes flexing, and thus deformation, of the deformable member 610 relative to the head 120 so that part of the flange 616 moves away from the front side 123 of the head 120 to place the passageway 330 in fluid communication with the exterior of the toothbrush 1. Such a force thus moves the control valve 600 to the second position for permitting fluid flow from the cavity 400, and more specifically from the first reservoir 401, through the fluid outlet 125 between the deformable member 610 and the wall of the head 120 defining the fluid outlet 125. Subsequent removal or reduction of the force permits the inherent resiliency of the material of the deformable member 610 to move the deformable member 610 back to the first position. In other words, the deformable member 610 is biased to the first position by the inherent resiliency of the material of the deformable member 610 itself.
At the proximal end 111 of the handle 110, and indeed the proximal end 101 of the body 100, the toothbrush 1 comprises the pump 500. The pump 500 is for pushing air into the second reservoir 402 from the exterior of the toothbrush 1. More specifically, the toothbrush 1 comprises a first opening 420 fluidly connecting the second reservoir 402 with the exterior of the toothbrush 1 via the pump 500. Since the overall cavity 400 is of a fixed volume, such pushing of air into the second reservoir 402 causes pressurization of the second reservoir 402 and, in turn, pressurization of the first reservoir 401 and the oral care fluid therein.
The pump 500 comprises a pump actuator 510 movably attached to the handle 110. The pump actuator 510 forms the proximal end 11 of the toothbrush 1. The handle 110 and the pump actuator 510 define therebetween a chamber 530 of the pump 500. Since the pump actuator 510 is movably attached to the handle 110, the chamber 530 is of variable volume. That is, as the pump actuator 510 is moved towards the handle 110, the volume of the chamber 530 is reduced. In a variation to the illustrated embodiment, the toothbrush 1 includes a biasing device, such as a helical spring, between the pump actuator 510 and the handle 110 for biasing the pump actuator 510 away from the handle 110.
In the illustrated embodiment, the pump actuator 510 is substantially rigid. In a variation to the illustrated embodiment, the pump actuator 510 comprises flexible material, such as an elastomer or an elastomeric material, defining the chamber 530. In such a variation, the volume of the chamber 530 is reducible by compressing or otherwise deforming the pump actuator 510.
The pump actuator 510 also defines a second opening 520 fluidly connecting the chamber 530 with the exterior of the toothbrush 1. The chamber 530 is fluidly connected with the second reservoir 402 via the first opening 420. Thus, the second reservoir 402 is fluidly connected with the exterior of the toothbrush 1 via the first opening 420, the chamber 530, and the second opening 520, in that order. The pump 500 further comprises a check valve 511 (herein referred to as the “first check valve”, for ease of reference only) in the first opening 420 for permitting air flow into the second reservoir 402 from the exterior of the toothbrush 1 via the first opening 420 and for restricting or preventing air flow from the second reservoir 402 to the exterior of the toothbrush 1 via the first opening 420. In variations to the illustrated embodiment, the first check valve 511 may be fixed to an inner wall of the second reservoir 402, or to an inner wall of the chamber 530, over the first opening 420, and thus may not be considered to be in the first opening 420. The pump further comprises a check valve 512 (herein referred to as the “second check valve”, for ease of reference only) in the second opening 520 for permitting air flow into the chamber 530 from the exterior of the toothbrush 1 via the second opening 520 and for restricting or preventing air flow from the chamber 530 to the exterior of the toothbrush 1 via the second opening 520. In variations to the illustrated embodiment, the second check valve 512 may be fixed to an outer wall of the pump actuator 510, or to an inner wall of the chamber 530, over the second opening 520, and thus may not be considered to be in the second opening 520. The pump 500 is operable to reduce the volume of the chamber 530 when the second opening 520 is blocked, e.g. by the second check valve 512, thereby to push air from the chamber 530 into the second reservoir 402 via the first opening 420.
Operation of the illustrated toothbrush 1 will now be described. While maintaining the control valve 600 at the first position, and preferably prior to brushing their teeth, a user moves the pump actuator 510 towards the handle 110, thereby to reduce the volume of the chamber 530. During this movement, the second check valve 512 prevents air leaving the chamber 530 via the second opening 520, and the first check valve 511 permits air to pass from the chamber 530 to the second reservoir 402 via the first opening 420, thereby increasing the pressure of air present in the second reservoir 402. The increased pressure of the air in the second reservoir 402 causes the air in the second reservoir 402 to apply a force to the piston 410. This application of force to the piston 410 causes the volume of the first reservoir 401 to be reduced, which pushes the oral care fluid in the first reservoir 401 towards the control valve 600. When the user subsequently moves the pump actuator 510 away from the handle 110, the chamber 530 expands, the second check valve 512 permits air to enter the chamber 530 via the second opening 520, and the first check valve 511 prevents air returning from the second reservoir 402 into the chamber 530 via the first opening 420. Repeated such movements of the pump actuator 510 towards, and then away from, the handle 110 while the control valve 600 is at the first position further increases the pressure of the oral care fluid in the first reservoir 401. That is, the oral care fluid in the first reservoir 401 becomes “pre-pressurized”.
Preferably, the user next applies a dentifrice to the oral care elements 200 and then uses the dentifrice and the oral care elements 200 to brush their teeth. During the brushing, a force applied to the deformable member 610 of the control valve 600 by a surface in the user's oral cavity, such as their teeth or tongue, causes flexing, and thus deflection, of the deformable member 610 relative to the head 120, so that part of the flange 616 moves away from the front side 123 of the head 120 to place the passageway 330 in fluid communication with the exterior of the toothbrush 1. Such a force thus moves the control valve 600 to the second position for permitting fluid flow from the cavity 400, and more specifically from the first reservoir 401, through the fluid outlet 125 between the deformable member 610 and the wall of the head 120 defining the fluid outlet 125. Since the oral care fluid in the first reservoir 401 has been pre-pressurized, when the control valve 600 is moved to the second position, an appreciable volume of the oral care fluid flows out of the toothbrush 1 through the fluid outlet 125 via the passageway 330. The user may then remove or reduce the force applied to the deformable member 610, to permit the flange 616 to move back into full contact with the front side 123 of the head 120 to block the fluid outlet 125, thereby to return the control valve 600 to the first position. Of course, a user may choose to dispense the oral care fluid before, during or after brushing their teeth.
In a variation to control valve 600 of
The control valve 600 of the toothbrush 1 of
The deformable member 610 blocks the fluid outlet 125 when the control valve 600 is at the first position, as shown in
From a user's perspective, the oral care implement 1 of
In another variation to control valve 600 of
The control valve 600 of the toothbrush 1 of
In variations to the illustrated embodiment, the proximal end 612 of the deformable member 610 is not cone-shaped, but comprises a leg, or spaced apart legs, anchored within the head 120. Nevertheless, the proximal end 612 would be collapsible or compressible to permit the distal end 614 of the deformable member 610 to move towards the head 120.
The deformable member 610, or more specifically a portion of the proximal end 612 of the deformable member 610, blocks the fluid outlet 125 when the control valve 600 is at the first position, as shown in
From a user's perspective, the oral care implement 1 of
In a further variation to control valve 600 of
As best shown in
More specifically, the oral care elements 200, 300 extend from respective first sides 123, 133 of the first and second heads 120, 130, and the toothbrush has a flexible pad 154 connecting respective second sides 124, 134 of the first and second heads 120, 130, which second sides 124, 134 are opposite from the first sides 123, 133 of the heads 120, 130. The first sides 123, 133 of the heads 120, 130 are on the first, front side of the toothbrush, whereas the second sides 124, 134 of the heads 120, 130 are on the second, rear side of the toothbrush. The flexible pad 154 forms the living hinge 152 and may be formed of an elastomeric material, such as an elastomer, a thermoplastic elastomer (TPE), or styrene-ethylene/butylene-styrene (SEBS). The flexible pad 154 is comprised in a soft tissue cleaner 150 of the toothbrush, which soft tissue cleaner 150 also comprises a plurality of projections 156 extending from the flexible pad 154. In variations to the illustrated embodiment, the first and second heads 120, 130 are connected to each other by a non-living hinge or by some other mechanism that still permits the second head 130 to move relative to the first head 120 between the first and second positions for controlling fluid flow through the fluid outlet 125.
The second head 130 comprises a resilient stopper 135 that is located in the fluid outlet 125 when the second head 130 is at the first position, so as to positively seal the fluid outlet 125 when the second head 130 is at the first position. The stopper 135 may be integrally formed with the flexible pad 154. In variations to the illustrated embodiment, the stopper 135 may be non-resilient or even omitted.
The toothbrush of
In the oral care implement 2 of
From a user's perspective, the oral care implement 2 of
In order to operate the toothbrush 3 of
Preferably, the user next applies a dentifrice to the oral care elements 200 and then uses the dentifrice and the oral care elements 200 to brush their teeth. As for the embodiment of
In respective variations to the embodiments illustrated in
Preferably, the propellant comprises a liquefied gas, such as a liquefied gas comprising one or more of propane, butane, isobutene, dimethyl ether, and a hydroflurocarbon, or a mixture of any two or more thereof. However, in some embodiments, the propellant comprises a compressed gas, such as a compressed gas comprising one or more of nitrogen, carbon dioxide, nitrous oxide, and compressed air, or a mixture of any two or more thereof. The use of liquefied gas is preferred due to the ability of liquefied gases to produce consistent pressure during discharge of the contents of the cavity 400. As will be understood by the person skilled in the art, preferably the propellant is a fluid that boils at a temperature lower than a temperature at which the oral care fluid boils. Preferably, the propellant is a fluid that boils at a temperature well below room temperature (e.g. 21° C.).
In order to operate the toothbrush 5 of
In respective variations to the toothbrushes 2, 3, 4, 5 of
In respective variations to the illustrated and discussed embodiments, the third check valve 340 is omitted.
In respective variations to the illustrated and discussed embodiments, the cavity 400 may be provided elsewhere in the body 100 than at the position shown in the Figures. For example, the cavity 400 may be provided in or adjacent to the neck portion 118 of the handle 110, or in the head 120 of the body 100. In some variations to the illustrated embodiment, the cavity 400 may extend into both the handle 110 and the head 120 of the body 100.
In respective variations to the embodiments illustrated in
In respective variations to the embodiments illustrated in
In each of the illustrated and discussed embodiments, since the user need only brush their teeth in the usual manner in order, effectively passively, to cause dispensing of an appreciable volume of oral care fluid, the mechanism provided for dispensing the oral care fluid is convenient, and further is non-tiring and comfortable for the user to operate during dispensing.
Filing Document | Filing Date | Country | Kind |
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PCT/US2014/037146 | 5/7/2014 | WO | 00 |
Publishing Document | Publishing Date | Country | Kind |
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WO2015/171132 | 11/12/2015 | WO | A |
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International Search Report and the Written Opinion of the International Searching Authority issued in international application PCT/US2014/037146 dated Jan. 22, 2015. |
Number | Date | Country | |
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20170071325 A1 | Mar 2017 | US |