US3399947A - Toothbrush - Google Patents

Toothbrush Download PDF

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Publication number
US3399947A
US3399947A US537596A US53759666A US3399947A US 3399947 A US3399947 A US 3399947A US 537596 A US537596 A US 537596A US 53759666 A US53759666 A US 53759666A US 3399947 A US3399947 A US 3399947A
Authority
US
United States
Prior art keywords
knob
dentifrice
valve
piston
brush head
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.)
Expired - Lifetime
Application number
US537596A
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English (en)
Inventor
Fallesen Mai
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.)
Maifa Tekniska AB
Original Assignee
Maifa Tekniska AB
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 Maifa Tekniska AB filed Critical Maifa Tekniska AB
Application granted granted Critical
Publication of US3399947A publication Critical patent/US3399947A/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • A46B11/001—Brushes with reservoir or other means for applying substances, e.g. paints, pastes, water with integral reservoirs
    • A46B11/002—Brushes with reservoir or other means for applying substances, e.g. paints, pastes, water with integral reservoirs pressurised at moment of use manually or by powered means

Definitions

  • a toothbrush has a cavity for dentifrice which is supplied by a passage to the brush head.
  • a piston reciprocating in the cavity is connected by a piston rod to an actuating knob.
  • a valve controlling said passage is slidingly supported on the piston .rod; two resilient diverging arms of the valve body are engaged by an inner extension of the knob when the latter is pushed inwardly in the valve closing position and release the knob when it is pulled outwardly to open the passage for the dentifrice pushed out by the piston.
  • the present invention relates to a toothbrush of the type which in the shaft contains a tooth-cleaning agent or dentifrice which in different manners can be extruded into the bristles in the brush head.
  • toothbrushes of the said type possess a number of disadvantages, e.g. on account of too large dimensions or their construction; they have been awkward to use and the extrusion opening for the dentifrice in the brush head has been subject to clogging due to the drying of the dentifrice.
  • the toothbrush according to the invention does not possess the said disadvantages.
  • the present invention relates to a toothbrush consisting of a handle and a brush head which in the length wise direction has a cavity running from a plane near the outer end of the handle through the same and further through the brush head and out through its end.
  • Said cavity has, at least in the handle, the form of a container or a cylinder for the tooth-cleaning agent or dentifrice, which container preferably has a rectangular, quadratic or circular cross section.
  • the dentifrice is fed through the cavity towards the brush head by a piston, located in the dentifrice container.
  • the said piston is brought to displace the dentifrice by the pulling action of a rod, one end of which is attached to the piston and which runs through the whole length of the cavity, the other end of the rod being attached to a pull knob at the outer end of the brush head.
  • valve chamber The part of the above mentioned cavity which is present essentially in the brush head and which is termed the valve chamber, has a rectangular cross section and therefrom and, more closely, from the part thereof which is most close to the handle, a'duct is arranged which ends among the bristles in the brush head.
  • a movable-valve element is arranged in the valve chamber; Said element-has the form of a piston which fits up against the walls of the piston chamber and which, furthermore, in the end turned towards the brush head, has two branches which are flexibly springing outwards and which essentially fit tightly to the part of the valve chamber near the brush head end, the side walls of which forms an angle against the lengthaxis of the toothbrush. Between the two branches of the valve element there is a hollow space which is apt to receive a guide extending from the pull knob, the inner end of said guide being rounded.
  • FIG. 1 shows a Patented Sept. 3,1968
  • toothbrush according to the invention in section and viewed from above (the pulling knob being in the feeding position) and FIG. 2 shows the same brush in section and viewed fromthe side (the pullingknob being in the closed position).
  • the handle is, marked '1
  • the brush head 2 the cylinder or container for the dentifrice in the handle is marked 3
  • .4 indicates the.,pis,ton present in the container, which piston tightly fits tothe inner wall of the container.
  • the cross section of the container is preferably rectanlgular, quadratic or circular.
  • the pulling rod connected to the piston is marked 5.
  • the valve chamber is marked 6 and the outlet opening for the dentifrice is marked 7.
  • the said outlet opening is preferably inclined towards the end of the brush head 2 and ends among the bristles of the head.
  • the valve element for closing the outlet opening 7 is marked with 8, whereas its flexible branches are. marked 9.
  • the valve element 8 has a tight fit against the walls of the valve chamber 6 so that there is no leaking of dentifrice.
  • the part of the valve chamber 6 that is facing the brush head is enlarged in a wedgeform in the plane shown in FIG. 1 against the said end to the formation of stop knobs 10 which delimit the movement of the valve element 8 to the right on the figure, whereas the movement towards left of the valve element 8 is delimited by stop knobs 11.
  • the pull rod 5 runs free through a hole in the valve element 8 so that the said details are freely movable in relation to each other in the lengthwise direction of the brush.
  • the toothbrush according to the invention functions as described below.
  • the dentifrice is injected in the opening 7 for filling the container 3.
  • the pull knob 13 and thus also the valve element 8 is in the position shown in FIG. 1, the opening 7 being free.
  • the container 3 is suitably provided with an air-escape duct, preferably located in the end of the handle.
  • the pull knob 13 is pressed to its inner position, the locking knob 12 being introduced between the branches 9 of the valve element 8 and the latter is then pressed to the left on FIG. 1 until close to the stop knobs 11 so as to close the outlet opening 7 and to cause the branches 9, by the wedge-form of the valve chamber, to be pressed against each other so as to lock the pull knob in the closedposition.
  • the pull knob 13 Prior to the use of the toothbrush the pull knob 13 is pulled out so as to cause the valve element 8, which then is fixed to the locking knob 12, to follow the movement of the pulling knob until the flexible branches 9 have come to a stop against the locking knobs 10.
  • the outlet opening 8 is then free and on further pulling the pull knob 13 the piston 4 feeds dentifrice which is extruded from the opening 7.
  • the pull knob 13 is returned to its inner position as shown in FIG. 2, the valve element 8 being closed to the locking knobs 11 and the opening 7 being closed. After use the brush is cleaned with running water.
  • the toothbrush according to the invention is suitably manufactured from a plastic material which in a known manner is formed by extrusion.
  • the plastic material is opaque,
  • a toothbrush comprising a handle and a brush head carried by one end of said handle, a cavity of uniform cross section serving as dentifrice container in said handle,
  • said inner knob means .thereby pushing the..valve.means into closed position, and said inner knob means being released by said arms whenthe outer knob is pulled outwardly thereby placing the valve means in the open posipiston rod connecting said valve actuating means with said 5 tion.
  • valve means being slidingly supported on said piston rod and being provided with resilient diverging arms, means limiting the movement of said valve means on said piston rod between open and closed position, said valve actuating means having an outer knob and inner knob means, said inner knob means entering said diverging arms when the outer knob is pushed inwardly and References Cited UNITED STATES PATENTS 10 LOUIS G. MANCENE, Primary Examiner.

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  • Brushes (AREA)
US537596A 1965-02-17 1966-02-17 Toothbrush Expired - Lifetime US3399947A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE2020/65A SE310647B (cg-RX-API-DMAC7.html) 1965-02-17 1965-02-17

Publications (1)

Publication Number Publication Date
US3399947A true US3399947A (en) 1968-09-03

Family

ID=20259247

Family Applications (1)

Application Number Title Priority Date Filing Date
US537596A Expired - Lifetime US3399947A (en) 1965-02-17 1966-02-17 Toothbrush

Country Status (3)

Country Link
US (1) US3399947A (cg-RX-API-DMAC7.html)
DE (1) DE1532779A1 (cg-RX-API-DMAC7.html)
SE (1) SE310647B (cg-RX-API-DMAC7.html)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2665442A (en) * 1949-04-16 1954-01-12 Martino William Toothbrush with refillable dentifrice dispenser

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2665442A (en) * 1949-04-16 1954-01-12 Martino William Toothbrush with refillable dentifrice dispenser

Also Published As

Publication number Publication date
SE310647B (cg-RX-API-DMAC7.html) 1969-05-12
DE1532779A1 (de) 1970-01-22

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