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Publication numberUS2628377 A
Publication typeGrant
Publication dateFeb 17, 1953
Filing dateMar 21, 1950
Priority dateMar 21, 1950
Publication numberUS 2628377 A, US 2628377A, US-A-2628377, US2628377 A, US2628377A
InventorsFloyd M Cockriel
Original AssigneeFloyd M Cockriel
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Mechanical toothbrush
US 2628377 A
Abstract  available in
Previous page
Next page
Claims  available in
Description  (OCR text may contain errors)

Feb- 17, 1953 F. M. cocKRlEL MECHANICAL TOOTHBRUSH Filed March 21, 1950 I N VEN TOR. mail.

Patented Feb. 17, 1953 UNITED STATES PATENT OFFICE 3 Claims. l

This invention relates generally to toothbrushes, and more particularly to a mechanical toothbrush having rotary brushes.

A primary object of this invention is to provide a toothbrush which will thoroughly cleanse the teeth without injury to the gums or teeth, and in an expeditious manner.

Another object of this invention is to provide a toothbrush which is easily cleansed after use, the elements which are brought into contact with the teeth being considerably removed from the motor used to drive the same, so that the danger of short circuiting the motor or damage thereto by water is minimized.

Another object of this invention is to provide a mechanical toothbrush which is extremely safe to use from the point of view of proper shielding of the rotating parts, including the flexible cables used in this invention to connect the rotary brushes with the motor,

Yet another object of this invention is to provide a head which is somewhat resilient and presenting a concavity wherein the rotary brushes are housed in such a manner that the resiliency of the head allows the rotary brushes to move slightly relative to each other during use, the axial members of the brushes themselves being capable of a limited bending, all these features being directed toward greater efficiency and safety in use.

Another object of this invention is to provide a mechanical toothbrush in which rotary toothbrush units are easily removed and replaced when necessary.

Yet another object of this invention is to provide a mechanical toothbrush in which rotary brushes are arranged within a, concavity or arch designed so that laterally disposed rotary brushes may contact opposite sides of a row of teeth simultaneously while still another brush or brushes may clean the top portions of the teeth, it being understood that this construction increases the speed with which a complete cleansing operation may be eiected.

And a last object to be mentioned specifically is to provide a mechanical toothbrush which is relatively inexpensive and practicable to manufacture, which is simple, comfortable and safe to use by even young children, which is hygienic from every point of view, and which will give generally efficient and durable service.

With these objects denitely in view, this invention resides in certain novel features of construction, combination and arrangement of elements and portions as will be hereinafter described in detail in the specication, particularly pointed out in the appended claims, and illustrated in the accompanying drawings which form a material part of this application, and in which:

Figure 1 is a .view in perspective of the assembled toothbrush;

Figure 2 is a lower plan view of the assembled toothbrush, a portion of the motor housing being broken yaway to conserve space and to allow the toothbrush to be shown on a'larger scale;

Figure 3 is a vertical sectional View, taken longitudinally of the structure shown in Figure 2;

Figure 4 is a transverse, vertical sectional view taken substantially on line 4-4 in Figure l;

Figure 5 is a transverse vertical sectional view taken substantially on the line 5-5 in Figure 3; and

Figure 6 is an enlarged transverse sectional view of a rotary brush, taken on the line 6 6 in Figure 3.

Similar characters of reference designate similar or identical elements and portions throughout the several views and throughout the specication.

Referring now to the drawing in detail, the embodiment illustrated includes a motor housing I0 with a motor, generally indicated diagrammatically at l2. The motor housing I0 has a reduced forward end I4 and electric power lead lines I6 will be of the exible cable type, and a switch I8 will be mounted on the housing in a convenient location as indicated best in Figure 1.

A neck 20 is provided with a socket portion 2'2 which fits snugly onto the reduced forward end I4 of the motor housing I0 and is secured thereon by screws 24. The reduced portion 26 of the neck may have indentations or actual apertures extending longitudinally of the reduced portion, to lighten the total weight of the toothbrush while adding a decorative feature. The head of the toothbrush is comprised of a plurality of parallel arms 3l), each concavo-convex in cross section and together comprising a head of general concavo-convex shape, the concavity eX- tending longitudinally of the toothbrush and the arms 30 being separated by parallel slots 32. Although the housing, neck and head may be constructed of any suitable material, the material used to construct the head should be somewhat resilient and the provision of the slot 32 will result in making the arms slightly more resilient. A resilient arch 34 or bridge will be secured to and between the outer end portions of the arms 30, by means of screws 38, or the like, and these screws may also be used to secure a plurality of 3 bearing plates 36 on the outer end portions of the arms 30.

A similar number oi simple bearings 40 are embedded in that portion of the head adjacent the neck 20, it being understood that the head and neck may be integral, and bearings 42 will be mounted in the bearing plates 36 to mount the axial members fl of the rotary brushes for rotation about axes parallel to the longitudinal axis of the head. Each axial member 44 carries la plurality of bristles d5 spaced radially and -longitudinally of the axial member. As indicated in Figure 6, the axial members 44 may be of spirally wound cable type and the bristles 48 may be inserted and clamped between adjacent windings, as will be clear from an inspection` of Figure 6. In a simple and preferred form of this invention, the axial members 44 will be continued through the neck 26, in which a plurality of elongated bores 50 are provided, these bores leading to the socket 22, and the end of the cables de will be supported in bearings 52 fixed in the neck 2li. These ends of the cables 48, remote from the rotary brushes, have squared termi Lals A recess is provided in the reduced end portion lll of the, motor 'housing, and the drive shaft 58 of the motor I2 extends into this recess and carries a drive pinion 50. A set of gears 02, 5d and 06 are operatively mounted Within the recess 55 and are each provided with a socket to` receive the squared terminal 5d of the corresponding cable 58. The pinion di) is in direct driving eng-agement with the gears 52 and while the gear e5 will be driven by the gear 0c, so that the gears 02 and Se will be driven in opposite directions and the corresponding brushes disposed laterally in the head of the toothbrush Will be driven in opposite directions. Suitable bearings will be provided for the gears @2, 5d and 5S Within the recess 53, it being preferred that each of the gears E2, and Se be provided with an extending hub portion 53 which will be rotatively engaged in a simple bearing le for each of the said gears, these lastmentioned bearing being regidly mounted within the recess 56, and another bearing 'E2 will be provided for the drive shaft 58 of the motor.

Special provision is made to prevent water from seeping into the bores 5?, the means therefor comprising sealing collars ld, of rubber or like material, secured to the flexible cables 4B and frictionally engaging ends of the bearings 40. It should also be noted that sleeve journals 15 .are rigidly secured to the iexible cables withf in the bearings dit, these sleeve journals being constructed of wear resistant material.` Similar sleeve journals l5 are secured to the ends of the cables 43 within the bearings d2.

The operation of this invention will be clearly understood from a consideration of the foregoing description of the mechanical details thereof, taken in connection with the above recited objects and the drawings. In recapitulation, the motor I2 will drive the rotary brushes, on the opposite sides of the head, in opposite directions so that both sides of a tooth 14 may be cleaned at the same time, the top of the tooth also being cleaned by the `center rotary brush. The slight resiliency of the head, coupled with the easy manipulability -of the toothbrush, result in maximum efiiciency with maximum comfort in use. It will also be clear that all oi the objects recited above are amply achieved by this invention. Further description would appear to be unnecessary.

Having described the claimed as new is:

1. A mechanical tooth brush comprising a hollow handle, a head, and a neck joining the handle and the head, said head including a plurality of spaced, parallel, ilexible arms secured to and exten-ding longitudinally from the peripheral edge of the end of the neck remote from said handle, said arms forming a longitudinally extending arch, a resilient, arched bridge connecting said arms to one another at their free ends, bearing plates secured to the free ends of said arms and extending radially toward the axis of the arch formed by said arms, the portion of said neck adjacent said arms being recessed and forming a continuation of said invention, what is arch, said hollow handle constituting a motor housing, a motor in said housing, a plurality o1" flexible cables each having one of its ends journaled in one said bearing plates and the other of its ends operatively connected to said motor for rotation, said cables extending through said neck portion, the portion of each of said cables between said bearing plates and said neck constituting a bristle shank.

2. The combination of claim l wherein said arms are integral with said neck.

3. The combination of claim l, the operative connection of said cables to said motor including multiple drive gears driven by said motor, said gears having sockets, said cables having their other ends secured in said sockets.


REFERENCES ITED The following references are of record in the le of this patent:

UNITED STATES PATENTS ."bfum Name Date 1,593,763 Henderson July 27, 1926 1,949,241 Carlson et al. Feb. 27, 1934 2,.24,l.45 Merkel July 19, 1938 2,150,842 Oliver Mar. 14, 1939 FOREIGN PATENTS Number Country Date 110,160 Germany Apr. 19, 1900 634,607 Germany Aug. 31, 1936 783,554 France Apr. 8, 1935 860,134 France Sept. 24, 1940

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US1949241 *Jul 30, 1932Feb 27, 1934Milton A BoomRotary toothbrush
US2124145 *Oct 18, 1934Jul 19, 1938Merkel Jr JohnMotor driven rotary tooth brush
US2150842 *Dec 10, 1936Mar 14, 1939Boyce Oliver ThurmanMotorized fountain-type tooth brush
DE110160C * Title not available
DE634607C *Jun 30, 1934Aug 31, 1936Gustav SchmolzZahnreinigungsvorrichtung
FR783554A * Title not available
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Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2691182 *Oct 26, 1951Oct 12, 1954Calvin U BaizeTriple action spiral toothbrush
US2758326 *Dec 3, 1952Aug 14, 1956RossRotary toothbrush
US3440680 *Apr 14, 1967Apr 29, 1969Winfried Joseph WerdingDental care apparatus
US3925841 *Mar 4, 1974Dec 16, 1975Caliendo Joseph LRotary toothbrush
US4313237 *Mar 18, 1980Feb 2, 1982Smith Eric LDriven rotary toothbrush
US4538315 *Aug 17, 1983Sep 3, 1985Frederic BarthDental hygiene apparatus having a plurality of rotating brushes
US4795347 *Sep 3, 1985Jan 3, 1989Wilhelm MaurerProcess and device for the cleaning of teeth
US5337435 *Sep 18, 1992Aug 16, 1994Krasner Janet HAutomatic toothbrush
US5836036 *Jun 20, 1997Nov 17, 1998Ivory; BrianSelf cleaning toothbrush
US5864911 *Oct 21, 1994Feb 2, 1999Patrick ArnouxToothbrush with a dual rotary brushing system
US6389634Oct 20, 1999May 21, 2002Gillette Canada CompanyOral devices
US6823554Oct 5, 2000Nov 30, 2004Gillette Canada CompanyOral devices
US7941886Sep 19, 2003May 17, 2011Braun GmbhToothbrushes
US8516642Feb 21, 2012Aug 27, 2013King Fahd University Of Petroleum And MineralsCurved-head electric toothbrush
US8584292Dec 1, 2011Nov 19, 2013Sam DjangDual rotating electric toothbrush
US8621698Apr 6, 2011Jan 7, 2014Braun GmbhToothbrushes
US9204949Dec 17, 2013Dec 8, 2015The Gillettte CompanyToothbrushes
US9561092 *Jan 24, 2012Feb 7, 2017Braun GmbhAttachment for an oral hygiene device
US9585738 *Apr 10, 2015Mar 7, 2017Roosevelt Patterson, DDSThree brush electronic tooth brush with splash guard
US20050060822 *Sep 19, 2003Mar 24, 2005Chenvainu Alexander T.Toothbrushes
US20080052845 *Sep 5, 2007Mar 6, 2008Djang Sam SCylindrical dual rotating electric toothbrush
US20110113576 *Nov 17, 2009May 19, 2011Yankell Samuel LToothbrush with movable head
US20110179595 *Apr 6, 2011Jul 28, 2011Chenvainu Alexander TToothbrushes
US20130134062 *Jan 24, 2012May 30, 2013Braun GmbhAttachment For An Oral Hygiene Device
DE1194816B *Aug 13, 1963Jun 16, 1965Philips NvAngetriebene Zahnbuerste
EP0101618A2 *Aug 22, 1983Feb 29, 1984Frédéric BarthDevice for the dental hygiene provided with several rotative brushes
EP0101618A3 *Aug 22, 1983Oct 2, 1985Frederic BarthDevice for the dental hygiene provided with several rotative brushes
EP0103959A1 *Jul 27, 1983Mar 28, 1984Gyula HegedusToothbrush having rotatable brushes
EP0173114A2 *Aug 2, 1985Mar 5, 1986Wilhelm MaurerMethod and utensil for cleaning the teeth
EP0173114A3 *Aug 2, 1985Jun 24, 1987Wilhelm MaurerMethod and utensil for cleaning the teeth
EP2428183A1 *Apr 26, 2010Mar 14, 2012Limited Liability Company "Nauka, Technika, Medicina"Mechanical toothbrush and drive mechanism therefor (embodiments)
EP2428183A4 *Apr 26, 2010Oct 31, 2012Diastam LtdMechanical toothbrush and drive mechanism therefor (embodiments)
WO1983003956A1 *May 5, 1983Nov 24, 1983Dejoux AndreElectric tooth brush with rotary brushes
WO2016162275A1 *Apr 1, 2016Oct 13, 2016Glaresmile S.R.L.Device for brushing the teeth, having multiple brushes with rotary and/or oscillating motion
WO2016163862A1 *Feb 22, 2016Oct 13, 2016Арман ДЮСЕНОВDyussenov electromechanical toothbrush
U.S. Classification15/23, 15/167.1
International ClassificationA61C17/26
Cooperative ClassificationA61C17/26, A61C17/349, A61C17/3418, A61C17/228
European ClassificationA61C17/22S, A61C17/26, A61C17/34B