EP0308549A1 - Brosse à dents avec distributeur de dentifrice - Google Patents

Brosse à dents avec distributeur de dentifrice Download PDF

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Publication number
EP0308549A1
EP0308549A1 EP87308339A EP87308339A EP0308549A1 EP 0308549 A1 EP0308549 A1 EP 0308549A1 EP 87308339 A EP87308339 A EP 87308339A EP 87308339 A EP87308339 A EP 87308339A EP 0308549 A1 EP0308549 A1 EP 0308549A1
Authority
EP
European Patent Office
Prior art keywords
dentifrice
brush
applicator
reservoir
housing
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
EP87308339A
Other languages
German (de)
English (en)
Inventor
Youti Kuo
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
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
Priority to US06/830,467 priority Critical patent/US4695177A/en
Application filed by Individual filed Critical Individual
Priority to EP87308339A priority patent/EP0308549A1/fr
Publication of EP0308549A1 publication Critical patent/EP0308549A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46B—BRUSHES
    • A46B11/00—Brushes with reservoir or other means for applying substances, e.g. paints, pastes, water
    • A46B11/0006—Brushes with reservoir or other means for applying substances, e.g. paints, pastes, water specially adapted to feed the bristle upper surface
    • 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

  • the present invention relates to a toothbrush which has a reservoir for storing dentifrice material. More particularly, the invention relates to a toothbrush wherein the stored dentifrice material is conveniently applied directly onto the top surface of the brush.
  • US-A-4,039,261 discloses a brush having a series of specially designed hollow bristles. Dentifrice material is forced through the bristles and deposited on the top brush surface. Because conventional bristles are not used, the increased cost of the brush is a significant factor. Moreover, because there is no way to seal off the interior of the bristles when they are not in use, hygiene is also a factor. US-A-3,879,139 describes a chimney made from bristles to facilitate movement of dentifrice material to the brush surface.
  • the brush described in US-A-4,221,492 can ostensibly be operated with one hand, but not without extreme difficulty.
  • the handle which contains the dentifrice material is flexible on one side and rigid on the other side.
  • the flexible side of the handle is manipulated to force dentifrice material from the handle to the brush while the rigid side of the handle is used to apply force while brushing.
  • a high level of skill and dexterity are required while brushing to prevent additional dentifrice material from being squeezed from the handle.
  • the user is required to apply pressure to the handle during brushing while at the same time exercising care not to simultaneously squeeze the handle which could cause more dentifrice material to be forced out of the handle.
  • US-A-2,986,766 discloses a fountain toothbrush having a reservoir in the brush handle for receiving a replaceable cartridge of dentifrice material. While the patentee recognizes the advantage of an applicator which places dentifrice material directly onto the top surface of a brush, the applicator and pump are cumbersome and require the use of both hands for operation. The operation of the pump is not automatic in that the dentifrice material is transported by a screw which requires turning by one hand while use of the other hand is required to hold the body of the brush. In addition, the brush can become messy during operation since the applicator grooves can become clogged with dentifrice material. The inconvenience of operation and the cumbersome structure detract from the other advantages associated with the brush.
  • US-A-3,613,698 describes a toothbrush wherein dentifrice material is deposited directly onto the top surface of the brush.
  • the disadvantages of the device described in the patent are that it requires a specially designed cartridge, it includes an array of flapper and ball check valves in the cartridge and the housing which lend to operating inefficiency and it cannot be conveniently operated with one hand.
  • Delivery of the dentifrice material from the cartridge to the brush involves a two stage operation requiring the use of two hands. In the first stage, the user must hold the housing with one hand while pulling an end cap back with the other hand in order to pump dentifrice material from the cartridge. In the second stage, the user must push the end cap forward with one hand while securing the housing in place with the other hand in order to deposit the dentifrice material onto the brush surface.
  • a dentifrice-­dispensing toothbrush is characterised by the features of Claim 1.
  • a dentifrice dispensing toothbrush which stores dentifrice material and deposits a controlled quantity of the stored material directly onto the top of the brush surface.
  • the toothbrush of the present invention comprises (1) a housing which includes a handle, (2) a reservoir situated within the housing for storing dentifrice material, (3) a brush having bristles which are attached to and supported by a brush head member, and (4) a pumping means which causes a controlled quantity of dentifrice material to be pumped from the reservoir through a channel and a movable applicator and thereafter, to be deposited onto the surface of the brush.
  • the channel is situated within the housing and has two openings. One of the openings is in communication with the pumping means while the remaining opening is in communication with the movable applicator.
  • the movable applicator is a tube which has two openings.
  • the applicator can be positioned so that it is in a depositing relationship with the brush surface. When the applicator is in this position, one of its opening is aligned with an opening in the channel to permit dentifrice material to be pumped from the reservoir, through the channel and the applicator and to be deposited directly onto the brush surface as it is discharged from the second opening in the applicator's sidewall.
  • the applicator can also be positioned so that it is in a non-depositing relationship with the surface of the brush.
  • the dentifrice material is stored either directly in the reservoir or in a removable cartridge which is inserted in the reservoir.
  • the cartridge comprises a hollow cylinder and a disc which has the same shape as the cylinder base.
  • the disc is slidably mounted within the cylinder and its purpose is to prevent backflow of dentifrice material when a pumping force is applied to the cartridge.
  • the cylinder contains grooves on its inner wall surface while the disc contains a plurality of flexible, radially extending fingers positioned along its circumference.
  • the maximum dimension of the disc including its flexible, radially extending fingers is greater than the maximum internal cross sectional dimension of the cylinder so that the ends of the flexible, radially extending fingers are mated in the grooves.
  • the angle and positioning of the finger tips in the grooves limit movement of the disc to one direction only.
  • the toothbrush of this invention is operated by depressing the brush member which causes dentifrice material to be pumped from the reservoir. This is coupled with a simultaneous action of extending the applicator to dispense a controlled quantity of dentifrice material directly onto the top surface of the brush.
  • the toothbrush described herein can be conveniently and efficiently operated with one hand.
  • the structure permits the user to apply dentifrice material to a brush and for the user to brush his or her teeth with the use of on hand. This is of particular significance to physically handicapped persons and to persons having a limited degree of manual dexterity. Because the quantity and flow of dentifrice material are controlled, it is unnecessary to rely on vision when it is applied to the brush. Thus, the invention is also advantageous to the visually impaired.
  • the toothbrush of this invention is conveniently transported and saves space since the toothbrush and dentifrice material are combined in one structure.
  • the means of applying dentifrice material to the top surface of the brush enables conventional means for cleaning the brush.
  • hygiene is promoted since the use of dentifrice material is personalized.
  • the dentifrice dispensing toothbrush of the invention includes a brush 2, a housing 4 which includes a handle portion and a base 9.
  • a tubular shaped applicator 6 with an applicator handle 10 is slidably attached to the housing 4. Included within the housing 4 is a reservoir 12 which is used for storing dentifrice material.
  • a pump or plunger handle 8 is used to pump dentifrice material from the reservoir 12 to the applicator 6 and subsequently onto the top surface of the brush 2.
  • the dentifrice material is either stored directly in the reservoir 12 or, in accordance with a preferred embodiment, is stored in a removable cartridge.
  • the removable cartridge can be of any shape so long as its shape is compatible with the shape of reservoir 12.
  • a removable cartridge 52 is a hollow cylinder with a wall 54 and the flanged base 9 on one end which also serves as the base for the housing 4.
  • a slidable disc 58 is mounted in the flanged end of the cartridge 52 to prevent backflow and and leakage of dentifrice material when a pumping force is applied to the cartridge.
  • the centre part 61 of the disc 58 has a shape which is conformable to the cylinder base 9.
  • the width of the lip 59 is slightly larger than the internal width of the cartridge.
  • the lip 59 is made from a flexible material so as to provide a snug fit when the disc 58 is inserted in the cartridge 52 and to enhance its sealing capability.
  • the cartridge 52 also has a flexibly flared end 51 on its other end.
  • a pair of oppositely disposed retention tabs 53 are situated on the inner wall surface of the cartridge at the flared end 51.
  • the external width of the cartridge at its flexibly flared end 51 is slightly greater than the internal width of the reservoir.
  • the flexibly flared end 51 thereby provides a seal to prevent dentifrice material from leaking from the cartridge when it is under a pumping force.
  • the distance between the oppositely disposed retention tabs 53 is less than the width of the disc 58 to prevent movement of the disc beyond the tabs. This arrangement ensures that the disc 58 and the cartridge 52 are removed from the reservoir together when the cartridge is replaced.
  • the disc 58 slides from the flanged end toward the opened of the cartridge.
  • Backward movement i.e. movement of the disc toward the flanged base 9 of the cartridge 52, is prevented by a plurality of flexible, radially extending fingers 60 which are positioned on the circumference of the disc 58.
  • the maximum width of the disc including the fingers is greater than the internal width of the cartridge 52.
  • the inner surface of the wall 54 contains a series of grooves 56 having an angular pitch which enhances the uni-directional movement of the disc 58. Backward movement of the disc 58 is further prevented when the tips of the fingers 60 are mated in position with the grooves 56 as shown at 62 of Figure 3C.
  • the cartridge 52 containing dentifrice material is inserted in the reservoir 12.
  • the disc 58 seals the bottom end of the cartridge 52 and ensures that dentifrice material flows only from the open end 48 of the cartridge 52.
  • the cartridge 52 is removable. Thus, when all the dentifrice material is used, the empty cartridge is removed and replaced with a full cartridge which is inserted into the reservoir 12.
  • a piston 25 is positioned at the output end of the reservoir 12.
  • the piston 25 contains a piston head 26 and a piston stem 28.
  • the head 26 of the piston 25 is also adjacent to the open end 48 of the cartridge 52.
  • a stem 28 of the piston 25 is positioned in a channel 34.
  • An orifice 30 comprises an annular opening which extends longitudinally through the piston head 26 and the piston stem 28.
  • the piston head 26 is preferably concave in shape to facilitate the flow of dentifrice material from the cartridge 52 through the orifice 30 to the channel 34.
  • a piston drive rod 27 is part of the piston 25 and is on the chamber side of the piston for transmitting a pumping force from the pump handle 8 to the piston head 26.
  • the housing 4 is made of a mouldable material. Thermoplastic resins are particularly suitable since they can be readily shaped using conventional moulding techniques. Thus, the housing 4 is moulded to provide a wall for the reservoir 12, a wall for the channel 34, a plunger well 66 and a recess 7 for the applicator 6.
  • the channel 34 incudes a first opening or inlet 33 and a second opening or outlet 35.
  • the inlet 33 is in communication with the orifice 30 while the outlet 35 is in communication with the applicator 6 as shown in Figures 2A and 2B.
  • the applicator 6 is shown in Figures 5A and 2B as being mounted in the recess 7 in the housing 4. It is comprised of a tube having a closed end 24, an inlet or first opening 14 in a side wall 18 of the tube and an outlet or second opening 16 at the remaining end or in the side wall 18 of the tube and an outlet or second opening 16 at the remaining end or in the side wall 18 near the remaining end (not shown).
  • a bend 22 facilitates flow of dentifrice material through the applicator and onto the brush surface.
  • the closed end 24 includes a solid portion which is of sufficient length to block the flow of dentifrice material into the recess 7 when the applicator is in a fully extended dispensing position. It also prevents dentifrice material from becoming lodged in space which is not in the path of flow of the dentifrice material.
  • the applicator 6 is movable from a retracted position as shown in Figure 2A to a fully extended position as shown in Figure 2B.
  • the applicator When fully extended, the applicator is in a depositing relationship with the surface of the brush 2.
  • the second opening 16 of the applicator In this position the second opening 16 of the applicator is immediately over the surface of the brush 2, enabling dentifrice material to be deposited directly onto the surface; the first opening 14 is aligned with the second opening 35 of the channel 34 to permit dentifrice material to flow from the channel 34 to the applicator.
  • the applicator is not sufficiently extended, the applicator is not in a depositing relationship with the surface of the brush 2.
  • No dentifrice material can be pumped through the applicator and deposited on the surface of the brush 2 because the first opening 14 of the applicator and the second opening 35 of the channel are not aligned. The non-alignment of these openings blocks the flow path of the dentifrice material.
  • the applicator is normally stored in its fully retracted position when not in use. When in this position, it is in a non-depositing relationship with the brush surface and no dentifrice material can flow through it. This position prevents leakage of dentifrice material if the pumping means is inadvertently activated.
  • the applicator handle 10 assists the user in extending or retracting applicator 6.
  • the brush and plunge assembly is shown in figures 4A, 4B and 8.
  • the brush 2 includes a set of bristles 38. The bottom end portions of the bristles are attached to a brush head support 36. The top end portions are unattached and collectively provide a surface 40 for supporting the dentifrice material.
  • the brush head support 36 is attached to the assembly by any suitable means.
  • a threaded coupling 41 and a non-­ circular bushing are particularly advantageous since this arrangement permits the brush head to be easily replaced when necessary. Moreover, it provides a secure attachment to prevent rotation of the brush and also to prevent the brush head from becoming detached from the rest of the assembly while in use.
  • the brush and plunger assembly also includes a plunger 42 and means for releasably attaching the assembly to the housing 4.
  • a fastener such as 44 and a corresponding member (not shown) in the housing are particularly suitable for retaining the assembly in position in the well 66 ( Figure 5A).
  • the plunger 42, a plunger spring 46 and a plunger spring support 50 provide a means for applying a pumping force to dentifrice material stored in the reservoir 12.
  • a pulling force is initially applied to the plunger 42 by a force applied to the plunger handle 8, which pulls the brush closer to the applicator 6.
  • the spring 46 is compressed and the plunger 42 contacts the piston drive rod 27 causing the piston head 26 to move toward base 9.
  • a partial vacuum is created in the pump chamber 68 ( Figure 2).
  • the pumping force is transmitted to the dentifrice material 64 contained in the cartridge 52. Because no backflow is possible, the dentifrice material 64, under increased pressure, is caused to flow from the cartridge 52 through the orifice 30 and into the channel 34.
  • the outlet 35 of the channel 34 is aligned with the applicator inlet 14, the dentifrice material is forced into the applicator 6. Simultaneously, a controlled portion of dentifrice material flows from the applicator outlet 16 and is deposited onto the top of the brush surface 40.
  • the plunger 42 When the force applied to the handle 8 is released, the plunger 42 is caused to return to its original position by the reaction force of the spring 46.
  • the partial vacuum previously created in the pump chamber 68 causes the piston 25 to return to its original position.
  • a spring 31 attached to a piston drive rod extension 29 situated at the base of the plunger well 66 facilitates return of the piston 25 to its original position.
  • the piston drive rod extension 29 is connected to the piston drive rod 27.
  • a pressure lower than atmospheric pressure is thus created on the cartridge side of the piston 25 which causes a volume of dentifrice material which is equivalent to the volume of the pump chamber to advance with the piston head 26 to occupy the space previously created as the pump chamber 68.
  • the disc 58 As dentifrice material moves toward the piston 25, the disc 58 is also simultaneously moved in the same direction due to the pressure difference. As previously explained, the movement of the disc 58 is uni-directional because of the locking action provided by the positioning of the fingers 60 into the grooves 56 in the wall 54 of the cartridge 52.
  • the volume of the pump chamber 68 corresponds to the quantity of dentifrice material deposited on the surface of the brush during one application. This controlled quantity ensures that excessive dentifrice is not used thereby minimizing waste and enhancing efficiency.
  • the bristles comprising the brush surface 40 can be arranged in any of the standard configurations known in the art. It is preferred that the bristles 39, on the perimeter of the brush head, be slightly longer than the bristles located near the centre of the brush surface except along the perimeter farthest from the handle. As described below, elongated bristles 39 clean excess dentifrice material from the applicator outlet 16 when the applicator is retracted.
  • a U-shaped bristle configuration as shown in Figure 1 is particularly suitable. In this arrangement, shortened bristles 37 are situated near the centre and at the forward end of the brush surface farthest from the handle. The elongated bristles 39 are situated along the remaining perimeter of the brush surface.
  • FIGs 6A, 6B and 6C The operation of the dentifrice dispensing toothbrush is demonstrated in Figures 6A, 6B and 6C. While the user is holding the device by the handle part of the housing 4 with one hand, the user's thumb and index finger are simultaneously used to apply opposite forces to plunger the handle 8 and the applicator handle 10. The forces applied by the thumb and index finger cause the brush 2 and the applicator 6 to move towards each other. As the brush surface 40 passes directly under the applicator outlet 16, a controlled portion of dentifrice material is deposited directly onto the top of the brush surface 40. The alignment of the applicator outlet 16 and the brush surface 40 are such that dentifrice material is deposited over a controlled length on the brush surface.
  • the index finger and thumb apply opposite forces to the handles 8 and 10 causing the applicator to become retracted and the brush to become fully extended and ready for use.
  • the elongated bristles 39 at the handle end of the brush 2 clean excess dentifrice material 64 from the applicator outlet 16 as the applicator is retracted.
  • the brush 2 is readily cleaned with water and the brush is ready for reuse.
  • the outlet 16 becomes closed which also seals the dentifrice material contained on the device from the atmosphere. It is therefore prevented from caking or drying out when not in use.
  • the design of the disc 58 prevents a leakage when the dentrifrice material is pumped from the cartridge 52.
  • the piston 25, the plunger 42, the applicator 6 and the housing 4 are interpositioned so as to provide enhanced flow and to provide seals against leakage of dentifrice material.
  • a port 5 is provided in the housing 4 for viewing the dentifrice material 64 in the cartridge 52. This serves to alert the user as to when the cartridge is nearing an empty state and in need of replacement before it is completely empty.
  • the port 5 also allows trapped air to be vented from the housing when the cartridge is inserted in the housing.
  • the advantages of the dentifrice dispensing toothbrush of the invention are readily apparent from the foregoing description. Its storage space is minimized since it is storable in an upright position on its base. Because dentifrice material is deposited directly onto the top surface of the brush instead of being applied from the bottom of the brush, it is easy to clean. The brush and the cartridge can be replaced without replacing the entire device thus providing an economic benefit. The application of a controlled quantity of dentifrice material to the brush surface and the need for the use of only one hand to operate the device are beneficial to the visually and physically handicapped.
  • the applicator 6 can, if desired, be stationary rather than movable. Also, the handles 8 and 10 can be mechanically linked so that the movement of one causes movement of the other.
  • the disc 58 can be used in conjunction with cartridge walls which do not contain grooves. Also, the flexible, radially extending fingers 60 can be replaced by a flexible annular flange which is positioned along the circumference of the disc 58.
  • the width or maximum dimension of the cartridge is the length of the longest chord which passes through the centre of a cross-sectional plane of the cartridge.
  • the width or maximum dimension of the disc is defined as the length of the longest finger-to-finger chord which passes through the centre of the disc.

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EP87308339A 1986-02-18 1987-09-21 Brosse à dents avec distributeur de dentifrice Withdrawn EP0308549A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US06/830,467 US4695177A (en) 1986-02-18 1986-02-18 Dentifrice dispensing toothbrush
EP87308339A EP0308549A1 (fr) 1987-09-21 1987-09-21 Brosse à dents avec distributeur de dentifrice

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP87308339A EP0308549A1 (fr) 1987-09-21 1987-09-21 Brosse à dents avec distributeur de dentifrice

Publications (1)

Publication Number Publication Date
EP0308549A1 true EP0308549A1 (fr) 1989-03-29

Family

ID=8198037

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87308339A Withdrawn EP0308549A1 (fr) 1986-02-18 1987-09-21 Brosse à dents avec distributeur de dentifrice

Country Status (1)

Country Link
EP (1) EP0308549A1 (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005120287A2 (fr) * 2004-06-14 2005-12-22 Pjer-Mise Velickovic Ensemble automatique de poche pour brosser les dents et conserver une hygiene dentaire
EP1647204A1 (fr) * 2002-09-06 2006-04-19 Geka Brush Gmbh Appareil de stockage et d'application
US8491210B2 (en) 2009-09-16 2013-07-23 Colgate-Palmolive Company Oral care system, kit and method
US8511323B2 (en) 2009-12-23 2013-08-20 Colgate-Palmolive Company Oral care dispenser and oral care system implementing the same
US9072371B2 (en) 2009-12-23 2015-07-07 Colgate-Palmolive Company Oral care system, kit and method
US9138046B2 (en) 2009-12-23 2015-09-22 Colgate-Palmolive Company Oral care system, kit and method
US9603443B2 (en) 2012-10-18 2017-03-28 Colgate-Palmolive Company Oral care system
US9743750B2 (en) 2012-10-18 2017-08-29 Colgate-Palmolive Company Oral care system

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2986766A (en) * 1958-10-13 1961-06-06 Peter H Landis Fountain brushes
US3816007A (en) * 1972-07-24 1974-06-11 Prima A De Dental hygiene assembly
GB2085717A (en) * 1980-09-25 1982-05-06 Blackwell Victor Campbell Reservoir toothbrush
EP0123518A1 (fr) * 1983-04-20 1984-10-31 Sasuke Endo Brosse à dents

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2986766A (en) * 1958-10-13 1961-06-06 Peter H Landis Fountain brushes
US3816007A (en) * 1972-07-24 1974-06-11 Prima A De Dental hygiene assembly
GB2085717A (en) * 1980-09-25 1982-05-06 Blackwell Victor Campbell Reservoir toothbrush
EP0123518A1 (fr) * 1983-04-20 1984-10-31 Sasuke Endo Brosse à dents

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1647204A1 (fr) * 2002-09-06 2006-04-19 Geka Brush Gmbh Appareil de stockage et d'application
WO2005120287A2 (fr) * 2004-06-14 2005-12-22 Pjer-Mise Velickovic Ensemble automatique de poche pour brosser les dents et conserver une hygiene dentaire
WO2005120287A3 (fr) * 2004-06-14 2006-10-19 Pjer-Mise Velickovic Ensemble automatique de poche pour brosser les dents et conserver une hygiene dentaire
US7223039B1 (en) 2004-06-14 2007-05-29 Pjer-Mise Velickovic Pocket automatic assembly for washing and maintaining dental hygiene
US8491210B2 (en) 2009-09-16 2013-07-23 Colgate-Palmolive Company Oral care system, kit and method
US8511323B2 (en) 2009-12-23 2013-08-20 Colgate-Palmolive Company Oral care dispenser and oral care system implementing the same
US9072371B2 (en) 2009-12-23 2015-07-07 Colgate-Palmolive Company Oral care system, kit and method
US9138046B2 (en) 2009-12-23 2015-09-22 Colgate-Palmolive Company Oral care system, kit and method
US10213012B2 (en) 2009-12-23 2019-02-26 Colgate-Palmolive Company Oral care dispenser and oral care system implementing the same
US9603443B2 (en) 2012-10-18 2017-03-28 Colgate-Palmolive Company Oral care system
US9743750B2 (en) 2012-10-18 2017-08-29 Colgate-Palmolive Company Oral care system

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