WO1990004938A1 - Deformable toothbrush - Google Patents

Deformable toothbrush Download PDF

Info

Publication number
WO1990004938A1
WO1990004938A1 PCT/AU1989/000468 AU8900468W WO9004938A1 WO 1990004938 A1 WO1990004938 A1 WO 1990004938A1 AU 8900468 W AU8900468 W AU 8900468W WO 9004938 A1 WO9004938 A1 WO 9004938A1
Authority
WO
WIPO (PCT)
Prior art keywords
toothbrush
user
teeth
head portion
angle
Prior art date
Application number
PCT/AU1989/000468
Other languages
French (fr)
Inventor
Robert Martin Mccusker
Original Assignee
Robert Martin Mccusker
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robert Martin Mccusker filed Critical Robert Martin Mccusker
Priority to BR898907758A priority Critical patent/BR8907758A/en
Publication of WO1990004938A1 publication Critical patent/WO1990004938A1/en

Links

Classifications

    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46B—BRUSHES
    • A46B5/00—Brush bodies; Handles integral with brushware
    • A46B5/002—Brush bodies; Handles integral with brushware having articulations, joints or flexible portions
    • A46B5/0054—Brush bodies; Handles integral with brushware having articulations, joints or flexible portions designed to allow relative positioning of the head to body
    • A46B5/0075—Brush bodies; Handles integral with brushware having articulations, joints or flexible portions designed to allow relative positioning of the head to body being adjustable and stable during use
    • A46B5/0079—Adjustable and stable shaft or handle, e.g. generally in one piece
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46B—BRUSHES
    • A46B5/00—Brush bodies; Handles integral with brushware
    • A46B5/002—Brush bodies; Handles integral with brushware having articulations, joints or flexible portions
    • A46B5/0054—Brush bodies; Handles integral with brushware having articulations, joints or flexible portions designed to allow relative positioning of the head to body
    • A46B5/0075—Brush bodies; Handles integral with brushware having articulations, joints or flexible portions designed to allow relative positioning of the head to body being adjustable and stable during use
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46B—BRUSHES
    • A46B5/00—Brush bodies; Handles integral with brushware
    • A46B5/02—Brush bodies; Handles integral with brushware specially shaped for holding by the hand
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46B—BRUSHES
    • A46B2200/00—Brushes characterized by their functions, uses or applications
    • A46B2200/10—For human or animal care
    • A46B2200/1066—Toothbrush for cleaning the teeth or dentures

Definitions

  • This invention relates to toothbrushes and in particular to permanently deformable toothbrushes which "educate" the user to apply the correct pressure to the teeth and gums.
  • toothbrush design As a result of many advances have been made in toothbrush design. Among these are what are usually called “angled toothbrushes” which are more convenient for brushing, most especially the back teeth, due to a bend or angle in the brush between the head portion and the handle portion. .. *
  • resiliently deformable or flexible toothbrushes may have either a portion of the handle or neck which is resiliently deformable, as disclosed in U.S. Patent Nos.
  • Patent No. 1327807, 2445651, 2631320 and 3994038 The alleged advantage of these "resiliently deformable" or “flexible” toothbrushes is that in use, the ' resilient portion deforms in response to a force applied by the user, there ensuring that the pressure applied to the teeth and gums is the correct pressure to facilitate thorough cleaning without damaging the teeth or gums of the user.
  • the pressure applied to the teeth and gums by the user of these resilient deformable toothbrushes is, however, a function of the resilient characteristics of the toothbrush, these characteristics being dependent upon the material from which the toothbrush is constructed and the shape of the toothbrush.
  • one such resilient toothbrush may assist a user to avoid applying exclusive pressure to his or her teeth and gums however, another user of the same toothbrush may not be applying the correct pressure to his or her gums even though it is the same pressure as that applied by the previous user, since a single resiliently deformable toothbrush does not take into consideration the individual characteristics of each user, ea-ch toothbrush being limited by its own resilient characteristics.
  • the present invention consists in a toothbrush of integral construction, formed of a synthetic plastics material and 5 having a bristle carrying head portion and an elongate handle portion, the head portion and the handle portion being joined by an intermediate portion which is of smaller cross-sectional area than the adjacent parts of the head portion and of the handle portion, the toothbrush
  • the intermediate portion is non-resiliently deformable to change the angular relationship between the head portion and the handle portion by ' the application of a bending moment of between 0.04 and 1.1 Newton meters.
  • the bending moment applied to the toothbrush is between 0.2 and 1.0 Newton meters.
  • the upper and lower limits of the bending moment are set by two criteria.
  • the upper limit is set by the limit at which the toothbrush will be readily bent or, put
  • the lower limit is set by the notes that is exerted
  • the brush may be adapted easily
  • Figs. 1 and 2 are plan and side elevation views, respectively, of a particular preferred embodiment of the invention, prior to deformation;
  • Figs. 3 and 4 are sectional views through A-A and B-B of Fig. 2;
  • Fig. 5 is a side elevation of the preferred embodiment of the present invention, after deformation but prior to brushing;
  • Fig. 6 is a side elevation of the brush in Fig. 5 after incorrect brushing.
  • Figs. 1 and 2 show a toothbrush according to the present invention which comprises a head portion 1 with bristles 2 attached, handle portion 3 and intermediate portion 4.
  • the reduced cross-section of the intermediate portion in relation to the handle and head portions can be clearly seen in Figs. 3 and 4, the bristles 2 not being shown in Fig. 3.
  • Fig. 5 the toothbrush according to the present invention is shown when it is deformed prior to insertion into the mouth. This initial non-resilient deformation is so that the head to handle portion angle suits the particular user.
  • the angle is formed by applying a bending moment of between 0.04 and 1.1 Newton meters to the toothbrush. This may be applied to one end of the brush, e.g. the head, while the other end, e.g. the handle, is held stationary and is performed without the application of heat.
  • the intermediate portion 4 being of the smallest cross-section is deformed non-resiliently, which creates and angle A between the head portion 1 and the handle portion 3, this angle remaining after the bending moment applied to the brush is released due to the non-resilient nature of the toothbrush.
  • the user may, of course, use the toothbrush completely undeformed, i.e. with the angle A equalling 180°.
  • the user should take a visual note of this angle A for subsequent comparison with the angle after brushing.
  • the user now places the brush in the mouth and brushes his/her teeth.
  • the user should take note of the angle B between the head portion 1 and the handle portion 3 sustained by the toothbrush even after removal of the force applied to the toothbrush by the user.
  • angle B is greater than angle A, it is clear that the pressure applied to the teeth during brushing is too large. The user can then, by a trial and error process, learn to apply the correct brushing pressure by applying that pressure which gives adequate cleaning of the teeth and gums yet does not increase the angle between the head and handle portions of the toothbrush. In the case of Fig. 6, angle B is clearly greater than angle A in Fig. 5 and therefore the user should reduce the pressure applied to his/her teeth.
  • angle B was equal to angle A
  • the user should check his/her teeth to ensure adequate cleaning. If the teeth and gums are not adequately cleaned, the user may increase the pressure applied to the teeth but must ensure that when brushing the angle between the head portion and handle portion does not increase from its original angle prior to brushing. It will be recognised by persons skilled i.. ⁇ the art that numerous variations and modifications may be made to the invention as described above without departing from the spirit or scope of the invention as broadly described.

Abstract

A toothbrush having a head portion (1) which has bristles (2) attached, a handle portion (3) and an intermediate portion (4) of reduced cross-section with regard to the head and handle portions (1), (3). The intermediate portion (4) of the toothbrush is non-resiliently deformable to change the angular relationship between the head portion (1) and the handle portion (2). If this angular relationship is changed after brushing, the user is applying excessive pressure during brushing. The shape of the toothbrush may be changed by the user to suit the user's particular mouth shape.

Description

DEFORMABLE TOOTHBRUSH
Technical Field
This invention relates to toothbrushes and in particular to permanently deformable toothbrushes which "educate" the user to apply the correct pressure to the teeth and gums.
Background Art
Recently, several advances have been made in toothbrush design. Among these are what are usually called "angled toothbrushes" which are more convenient for brushing, most especially the back teeth, due to a bend or angle in the brush between the head portion and the handle portion. ..*
Many designers have come up with what they consider to be the "perfect angle" for brushing, however as everyone is an individual, certain angled brushes are better than others depending upon the mouth and teeth of the user.
There are also known in the prior art several types of "resiliently deformable" toothbrushes. These resiliently deformable or flexible toothbrushes may have either a portion of the handle or neck which is resiliently deformable, as disclosed in U.S. Patent Nos.
1796001 and 4520526 and International Patent Application No. O88/06417, or may alternatively have a resilient head portion, as disclosed in several patents including U.S.
Patent No. 1327807, 2445651, 2631320 and 3994038. The alleged advantage of these "resiliently deformable" or "flexible" toothbrushes is that in use, the ' resilient portion deforms in response to a force applied by the user, there ensuring that the pressure applied to the teeth and gums is the correct pressure to facilitate thorough cleaning without damaging the teeth or gums of the user. The pressure applied to the teeth and gums by the user of these resilient deformable toothbrushes is, however, a function of the resilient characteristics of the toothbrush, these characteristics being dependent upon the material from which the toothbrush is constructed and the shape of the toothbrush.
Clearlyr one such resilient toothbrush, for example, may assist a user to avoid applying exclusive pressure to his or her teeth and gums however, another user of the same toothbrush may not be applying the correct pressure to his or her gums even though it is the same pressure as that applied by the previous user, since a single resiliently deformable toothbrush does not take into consideration the individual characteristics of each user, ea-ch toothbrush being limited by its own resilient characteristics.
It can therefore be seen that in order for these resilient toothbrushes to in fact apply the correct pressure for each and every user, the resilient characteristics of each toothbrush must be tailored to suit the particular individual user.
Further, when these resilient type toothbrushes are removed from the mouth, they return to their original undeformed shape thereby giving no indication as to whether or not an excessive pressure was applied to the teeth and gums.
It will be clear to the person skilled in the art therefore that a user could use such a "resiliently deformable" toothbrush under the impression that it is applying the correct pressure to his or her teeth when, in fact, there is no indication whether or not that the particular "resiliently deformable" toothbrush suits that individual. Its use may have applied an excessive pressure to the teeth and gums of the user causing damage. Clearly there is also a need for a toothbrush the shape of which can be individually matched to the user's mouth, by the user. Disclosure of Invention
In accordance with the first aspect, the present invention consists in a toothbrush of integral construction, formed of a synthetic plastics material and 5 having a bristle carrying head portion and an elongate handle portion, the head portion and the handle portion being joined by an intermediate portion which is of smaller cross-sectional area than the adjacent parts of the head portion and of the handle portion, the toothbrush
10 being characterised in that the intermediate portion is non-resiliently deformable to change the angular relationship between the head portion and the handle portion by' the application of a bending moment of between 0.04 and 1.1 Newton meters.
15 Preferably the bending moment applied to the toothbrush is between 0.2 and 1.0 Newton meters.
The upper and lower limits of the bending moment are set by two criteria. The upper limit is set by the limit at which the toothbrush will be readily bent or, put
20 another way, the limit of force that can be applied by the average user to bend a toothbrush. Cliearly, if this limit is too high, users would not be able to bend the toothbrush at all.
The lower limit is set by the forte that is exerted
25 on the toothbrush by brushing of the teeth. Clearly, if this limit is too low, the brush will deform whenever the teeth are brushed, even with extremely light brushing.
The advantage of the present invention over the prior art is twofold. Firstly, the brush may be adapted easily
30 to suit the user's mouth by simple bending. Secondly, any alteration after brushing of the angle between the head and handle portions of the toothbrush prior to brushing, gives an indication that the user is applying too great a pressure to his/her teeth and gums.
35 To explain, it will be recognised by those skilled in * the art that there is some deflection in a toothbrush when in use, due to the pressure exerted by the user on the teeth, whether the toothbrush is resiliently deformable or not. Any excess pressure over and above that required to clean the teeth and gums effectively, will be detrimental to both the teeth and surrounding gums. When using resiliently deformable toothbrushes of the prior art, the aforementioned deflection disappears upon removal of the toothbrush from the mouth. With the present invention, however, the brush may be non-resiliently deformed by the user prior to insertion into the mouth, the user taking note of the approximate angle between the head and handle portions. After brushing, the toothbrush is removed and a visual comparison between the angle before and after brushing is made, to determine if the pressure exerted by the user on his/her teeth is too large.
In this way, the user is "educated" by trial and error to brush within acceptable limits of pressure on the teeth and gums. This "education" of the user is in addition to the fact that the toothbrush is deformable prior to insertion into the mouth thereby allowing the user to tailor the shape of the toothbrush to suit his/her particular needs. The user, of course, may simply allow the toothbrush to remain straight before insertion an angle of over 180° being made if brushing is too hard. Brief Description of Drawings
The invention will now be described in more detail, by way of example only, with reference to the accompanying drawings in which:-
Figs. 1 and 2 are plan and side elevation views, respectively, of a particular preferred embodiment of the invention, prior to deformation;
Figs. 3 and 4 are sectional views through A-A and B-B of Fig. 2; Fig. 5 is a side elevation of the preferred embodiment of the present invention, after deformation but prior to brushing; and
Fig. 6 is a side elevation of the brush in Fig. 5 after incorrect brushing.
Best Mode for Carrying Out the Invention
Figs. 1 and 2 show a toothbrush according to the present invention which comprises a head portion 1 with bristles 2 attached, handle portion 3 and intermediate portion 4. The reduced cross-section of the intermediate portion in relation to the handle and head portions can be clearly seen in Figs. 3 and 4, the bristles 2 not being shown in Fig. 3.
In Fig. 5 the toothbrush according to the present invention is shown when it is deformed prior to insertion into the mouth. This initial non-resilient deformation is so that the head to handle portion angle suits the particular user.
The angle is formed by applying a bending moment of between 0.04 and 1.1 Newton meters to the toothbrush. This may be applied to one end of the brush, e.g. the head, while the other end, e.g. the handle, is held stationary and is performed without the application of heat. The intermediate portion 4 being of the smallest cross-section is deformed non-resiliently, which creates and angle A between the head portion 1 and the handle portion 3, this angle remaining after the bending moment applied to the brush is released due to the non-resilient nature of the toothbrush.
The user may, of course, use the toothbrush completely undeformed, i.e. with the angle A equalling 180°.
The user should take a visual note of this angle A for subsequent comparison with the angle after brushing. The user now places the brush in the mouth and brushes his/her teeth.
After removal, the user should take note of the angle B between the head portion 1 and the handle portion 3 sustained by the toothbrush even after removal of the force applied to the toothbrush by the user.
If this angle B is greater than angle A, it is clear that the pressure applied to the teeth during brushing is too large. The user can then, by a trial and error process, learn to apply the correct brushing pressure by applying that pressure which gives adequate cleaning of the teeth and gums yet does not increase the angle between the head and handle portions of the toothbrush. In the case of Fig. 6, angle B is clearly greater than angle A in Fig. 5 and therefore the user should reduce the pressure applied to his/her teeth.
If the angle B was equal to angle A, the user should check his/her teeth to ensure adequate cleaning. If the teeth and gums are not adequately cleaned, the user may increase the pressure applied to the teeth but must ensure that when brushing the angle between the head portion and handle portion does not increase from its original angle prior to brushing. It will be recognised by persons skilled i..π the art that numerous variations and modifications may be made to the invention as described above without departing from the spirit or scope of the invention as broadly described.

Claims

CLAIMS : -
1. A toothbrush of integral construction, formed of a synthetic plastics material having a bristle carrying head portion and an elongate head portion, the head portion and handle portion being joined by an intermediate portion which is of smaller cross-sectional area than the adjacent parts of the head portion and of the handle portion, the. toothbrush being characterised in that the intermediate portion may be non-resiliently deformed to change the angular relationship between the head portion and the handle portion by the applicant of a bending moment of between 0.04 and 1.1 Newton meters.
2. A toothbrush=_as claimed in claim 1 wherein the intermediate portion may be permanently deformed to change the angular relationship between the head portion and the handle portion by- the application of a bending moment of between 0.2 and 1.0 Newton meters.
3. A toothbrush as claimed in claims 1 or 2 wherein the angle between the head portion and the handle portion prior to brushing of the teeth is less than or equal to 180°.
PCT/AU1989/000468 1988-11-04 1989-10-31 Deformable toothbrush WO1990004938A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
BR898907758A BR8907758A (en) 1988-11-04 1989-10-31 DEFORMABLE TOOTH BRUSH

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
AU24726/88A AU582098B3 (en) 1988-11-04 1988-11-04 Toothbrush with deformable handle
AU24726/88 1988-11-04
US08/096,847 US5323504A (en) 1988-11-04 1993-07-26 Deformable toothbrush

Publications (1)

Publication Number Publication Date
WO1990004938A1 true WO1990004938A1 (en) 1990-05-17

Family

ID=25619403

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AU1989/000468 WO1990004938A1 (en) 1988-11-04 1989-10-31 Deformable toothbrush

Country Status (4)

Country Link
US (1) US5323504A (en)
JP (1) JPH04502116A (en)
AU (1) AU582098B3 (en)
WO (1) WO1990004938A1 (en)

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US5765254A (en) * 1995-11-29 1998-06-16 Radius Inc. Toothbrush with flexible neck
US6996870B2 (en) 1995-12-29 2006-02-14 Colgate-Palmolive Company Contouring toothbrush head
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US5850659A (en) * 1996-03-26 1998-12-22 The Smart Brush Corporation Toothbrush with bendable head
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US5735012A (en) * 1997-04-01 1998-04-07 Chesebrough-Pond's Usa Co., Division Of Conopco, Inc. Resiliently flexible toothbrush
US5876207A (en) * 1997-06-03 1999-03-02 Gillette Canada Inc. Pressure-sensing toothbrush
US6070286A (en) * 1998-01-27 2000-06-06 Cardarelli; Venanzio Angulated toothbrush
US6134738A (en) * 1998-05-27 2000-10-24 Bintraco Gmbh Brush construction for cleaning toilet bowls
US5968309A (en) * 1998-06-16 1999-10-19 D. Jet Enterprises, L.L.C. Method for transforming a thermoplastic novelty toothbrush into a costume jewelry piece or toy
US6574820B1 (en) * 1999-10-22 2003-06-10 The Gillette Company Brush head for toothbrush
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US6401291B1 (en) * 2000-09-11 2002-06-11 Chung-Fu Lee Toothbrush
US7908699B2 (en) 2001-07-03 2011-03-22 Colgate-Palmolive Company Oral care implement
US7721376B2 (en) 2002-09-20 2010-05-25 Colgate-Palmolive Company Oral care implement
US8806695B2 (en) 2002-08-09 2014-08-19 Colgate-Palmolive Company Oral care implement having flexibly supported cleaning elements extending in opposite directions
US8876221B2 (en) 2002-08-09 2014-11-04 Colgate-Palmolive Company Oral care implement
US7614111B2 (en) 2002-08-09 2009-11-10 Colgate-Palmolive Company Oral care implement
US7841041B2 (en) 2002-08-09 2010-11-30 Colgate-Palmolive Company Oral care implement
US8990996B2 (en) 2002-08-09 2015-03-31 Colgate-Palmolive Company Toothbrush
US20060026784A1 (en) 2002-08-09 2006-02-09 Colgate-Palmolive Company Oral care implement
CZ2005627A3 (en) * 2005-10-03 2006-09-13 Flek@Jaroslav Toothbrush
CN102058239B (en) 2007-02-02 2015-05-13 吉列公司 Oral hygiene implements having flexible elements, and methods of making the same
IL196650A (en) * 2009-01-22 2015-06-30 Mordechai Kirsh Toothbrush
WO2010151582A1 (en) * 2009-06-26 2010-12-29 The Gillette Company Pressure indicator for a tooth brush
JP5824121B1 (en) * 2014-08-01 2015-11-25 合資会社三和歯ブラシ工業所 toothbrush

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Also Published As

Publication number Publication date
US5323504A (en) 1994-06-28
AU582098B3 (en) 1989-02-10
JPH04502116A (en) 1992-04-16

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