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Publication numberUS2215031 A
Publication typeGrant
Publication dateSep 17, 1940
Filing dateFeb 27, 1939
Priority dateFeb 27, 1939
Publication numberUS 2215031 A, US 2215031A, US-A-2215031, US2215031 A, US2215031A
InventorsNeal Elmore
Original AssigneeNeal Elmore
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Motor driven toothbrush
US 2215031 A
Abstract  available in
Previous page
Next page
Claims  available in
Description  (OCR text may contain errors)

s p 7, 1940. N. ELMORE 2,215,031

MOTOR DRIVEN TOOTHBRUSH Filed Feb. 27, 1939 Patented Sept. 17, 1940 UNITED STATES PATENT OFFICE 1 Claim.

This invention relates to motor driven brushes, and its general object is to provide a brush of that character which is primarily designed for cleaningteeth, in that it includes an elongated 5 head conforming to the shape of the usual toothbrush head, but the tufts of bristles of my brush are carried by motor driven movable means, with the result the brush head can be held stationary at various places within the mouth for cleaning teeth and removing matter from crevices therein thatmay be inaccessible to the bristles of the usual brush, and in any event in a more efficient and thorough manner than would be possible by the latter brush, as well as with minimum effort on the part of the user.

A further object is to provide a motor driven toothbrush that preferably has the motor thereof separate therefrom, but connected thereto by suitableflexible means and the motor includes means for mounting the same on suitable supporting means, so that the motor will not inter: fere with the free use of the brush.

Another object is to provide a motor driven toothbrush that is simple in construction, in-

expensive to manufacture, and extremely efficient in operation, use and service.

' This invention also consists in certain other features of construction and in the combination and arrangement of the several parts, to be hereinafter fully described, illustrated in the accompanying drawing and specifically pointed out 'in the appended claim.

In describing the invention in detail, reference will be had to the accompanying drawing wherein like characters denote like or corresponding parts throughout the several views, and in which:

Figure 1 is a side elevation of my motor driven toothbrush and illustrates the motor thereof together with the connecting means between the 40 motor and. brush for driving the latter.

Figure 2 is a view looking toward the bristle side of my brush with parts broken away and in section.

Figure 3 is a sectional view taken approximately on line 3-3 of Figure 2, looking in the direction of the arrows.

Referring to the drawing in detail, it will be noted that the head is of the usual fiat elongated formation and includes a body I recessed to provide a chamber 2 extending longitudinally thereof, and the chamber is closed by a cover plate 3 held secured to the body by screws 4.

The chamber is provided with what may be termed scalloped side walls to provide rounded recesses throughout the length of the chamber,

as best shown in Figure 2, and mounted for rotation in bearing openings in the body and cover plate 3 are stub shafts 5 arranged in row formation upon diametrically opposite sides of the longitudinal center of the head, and each shaft has 5 secured thereto a worm gear 6 that extends into the rounded recesses of the chamber, as clearly shown in Figure 2. The enlarged bearing por tions or journals of the stub shafts that are mounted in the bearing openings in the cover 10 plate 3, as best shown in Figure 3, each have sockets therein within which are fixed tufts 1 of bristles that are outwardly flared from the. shafts, as best shown in Figure 3, and in order to rotate the tufts 1 through the medium of the 1 gears 6 there is provided a worm 8 formed on or otherwise secured to the shaft 9 that. extends along the longitudinal center of the head, with the worm 8 meshing with the gears 6, and one end of the worm shaft is reduced and extends into so a bearing opening arranged in the outer rounded end of the head, while the opposite end portion of the shaft 9 extends through a bore in the shank l0 which is provided with a threaded socket in its outer end, as clearly shown in Figure 2. 2i

Threadedly mounted in the socket of the shank I0 is the reduced inner end of the handle ll of my brush and the handle is provided with a bore extending along the longitudinal center thereof, within which is disposed a bearing sleeve l2 for 30 a stem shaft l3, the latter having toothed clutch members It secured to the ends thereof and the clutch member at the inner end meshes with a clutch member l5 secured to the outer end of the worm shaft 9, when the handle is secured to the a shank, as will be apparent.

The motor for driving my toothbrush is indicated by the reference numeral l6 and is preferably of the reversible type. It is controlled by a switch l1 and preferably has secured to the 40 casing thereof a suction cup I 8, for mounting the motor with respect to any suitable supporting means. Suitably secured to and extending from the motor is a flexible shaft l9 incased in a flexible casing 20 and the outer end of the shaft l9 5 has a toothed clutch member 2| secured thereto for meshing with the clutch member on the outer end of the shaft l3. Swiveled on the flexible shaft IQ for disposal about the clutch member 2| is a cap nut 22 to be threaded in the outer 50 end of the handle II for connecting the clutch member 2| with the clutch member [4 on the outer end of the shaft l3.

From the foregoing description and disclosure in the drawing, it will be obvious that the motor 55 is controlled by its switch, and that the motor is electrically connected with any suitable source of current, by a conductor 23. When the motor is running and the parts are connected together as shown, the tufts i of bristles will be rotated through the medium of the worm and its gears 6, with the result the brush head can be conveniently held in the mouth at'various places to bring about a thorough cleaning of the teeth with minimum effort on the part of the user.

It might be mentioned that the detachable association of the flexible shaft and the flexible casing thereof with respect to the handle allows ready removal of the brush therefrom, merely by unscrewing the cap nut 22 so that the brush can be used in the same manner as an ordinary brush if necessary or desirable. The detachable feature will prove very desirable, in the event the motor should fail or current to drive the same is not available.

It is thought from the foregoing description that the advantages and novel features of the invention will be readily apparent.

It is to be understood that changes may be made in the construction and in the combination and arrangement of the several parts, provided that such changes fall within the scope of the appended claim.

What I claim is:

A motor driven toothbrush comprising a handled head including a fiat elongated body having a shallow chamber therein extending longitudinally thereof and opening through the top of the body, said chamber being provided with scalloped side walls providing rounded recesses, a cover plate shaped to fit the body for disposal flush with the s de and end walls of the chamber for closing the latter, screws extending through the cover plate in rows adjacent to the sides thereof and threaded in the side walls of the chamber for securing the cover plate to the body, said cover plate and the bottom wall of the chamber having bearing openings therein arranged in rows upon diametrically opposite sides of the longitudinal centers thereof for registration with each other, stub shafts having ends mounted in the bearing openings of the bottom Wall and relatively large bearing journals on their opposite ends and mounted in the openings of the cover plate for rotation of the shafts, a worm gear for each shaft and fixed thereto for disposal in spaced rows and extending into the rounded recesses, a shaft extending between the rows of gears, a worm portion onthe shaft and meshing with the worm gears for rotating the same, said journals having sockets therein, tufts of bristles fixed within the sockets, and means for rotating the shaft.


Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2655674 *Sep 30, 1946Oct 20, 1953Grover Donald PMultiple rotary toothbrush with lip guard
US2655676 *Oct 24, 1946Oct 20, 1953Grover Donald PRotary toothbrush with lip guard
US3242516 *Feb 10, 1965Mar 29, 1966Herman CantorPower driven toothbrush
US4156620 *May 27, 1977May 29, 1979Clemens George SApparatus and method for cleaning teeth
US4827550 *May 4, 1988May 9, 1989Dental Research CorporationRemovable head mechanism for automatic cleaning device
US4845795 *Oct 25, 1988Jul 11, 1989Dental Research CorporationAutomatic cleaning device
US4989287 *Aug 18, 1989Feb 5, 1991Gimelli & Co. AgElectric toothbrushes
US5020179 *Jan 5, 1990Jun 4, 1991Gimelli & Co. AgElectric toothbrush
US5070567 *Feb 19, 1991Dec 10, 1991Neta HollandElectrically-driven brush
US5153962 *Nov 9, 1990Oct 13, 1992Ritter Charles HFluid powered brush
US5301381 *Dec 7, 1992Apr 12, 1994Klupt Michael FToothbrush system
US5321866 *Sep 28, 1993Jun 21, 1994Klupt Michael FToothbrush system
US6725490Nov 6, 2001Apr 27, 2004The Procter & Gamble CompanyComplex motion toothbrush
US6836917May 7, 2001Jan 4, 2005The Procter & Gamble CompanyReplaceable head electric toothbrush and connection structure therefor
US6892413Feb 13, 2003May 17, 2005The Procter & Gamble CompanyComplex motion toothbrush
US7225494Jul 30, 2002Jun 5, 2007Church & Dwight Co., Inc.Multi-motion toothbrush
US7340794May 1, 2006Mar 11, 2008The Procter & Gamble CompanyMulti-motion toothbrush
US7421753Apr 25, 2006Sep 9, 2008The Procter And Gamble CompanyElectric toothbrushes
US7428766Oct 22, 2004Sep 30, 2008Colgate-Palmolive CompanyPowered toothbrush
US7430778May 17, 2005Oct 7, 2008Colgate-Palmolive CompanyPowered toothbrush
US7636976Jul 20, 2006Dec 29, 2009The Procter & Gamble CompanyPower toothbrush
US7640614May 8, 2007Jan 5, 2010The Procter & Gamble CompanyMulti motion toothbrush
US7640615Jul 14, 2006Jan 5, 2010The Procter & Gamble CompanyElectric toothbrushes
US7698771Dec 17, 2004Apr 20, 2010The Procter & Gamble CompanyElectric toothbrush
US7725973Aug 16, 2007Jun 1, 2010The Procter & Gamble CompanyElectric toothbrushes
US7761947Feb 21, 2006Jul 27, 2010The Procter & Gamble CompanyComplex motion toothbrush
US7810201Dec 3, 2007Oct 12, 2010Braun GmbhToothbrushes
US7832042Nov 4, 2008Nov 16, 2010The Gillette CompanyBrush head for toothbrush
US7861348Dec 7, 2005Jan 4, 2011The Procter & Gamble CompanyElectric toothbrushes
US7861350Dec 11, 2009Jan 4, 2011The Procter & Gamble CompanyMulti-motion toothbrush
US7900309Aug 26, 2008Mar 8, 2011Colgate-Palmolive CompanyPowered toothbrush
US7917984Dec 14, 2009Apr 5, 2011The Procter & Gamble CompanyElectric toothbrushes
US8020238Aug 19, 2008Sep 20, 2011Colgate-Palmolive CompanyPowered toothbrush
US8096011Dec 16, 2010Jan 17, 2012The Procter & Gamble CompanyElectric toothbrushes
US8281443Dec 9, 2010Oct 9, 2012The Procter & Gamble CompanyMulti-motion toothbrush
US8359693May 26, 2011Jan 29, 2013Lee Wang KenElectric battery powered toothbrush with integrated tongue cleaner
US20050000045 *Jul 30, 2004Jan 6, 2005The Procter & Gamble CompanyComplex motion toothbrush
US20050132513 *Oct 22, 2004Jun 23, 2005Colgate-Palmolive CompanyPowered toothbrush
US20050204491 *May 17, 2005Sep 22, 2005Colgate-Palmolive CompanyPowered toothbrush
DE2736286A1 *Aug 11, 1977Dec 7, 1978George S ClemensMechanische zahnbuerste und verfahren zu ihrer anwendung
DE3630499A1 *Sep 8, 1986Mar 10, 1988Braun AgBuerstenelement fuer eine elektrisch betriebene zahnbuerste
DE3830649A1 *Sep 9, 1988Mar 15, 1990Gimelli & Co AgElektrische zahnbuerste
EP0044107A1 *Jul 3, 1981Jan 20, 1982F A C O Société Anonyme:Electric massage apparatus
EP0254397A1 *May 18, 1987Jan 27, 1988Bausch & Lomb Oral Care Division Inc.Removable head mechanism for power-driven cleaning brush
EP0259648A1 *Aug 17, 1987Mar 16, 1988Braun AktiengesellschaftBrush element for an electric toothbrush
WO1993024034A1 *May 25, 1993Dec 9, 1993Ausworld Consultants LimitedToothbrush
WO2002100212A2Jun 6, 2002Dec 19, 2002Colgate Palmolive CoBrush section for an electric toothbrush
WO2003039393A1Nov 6, 2002May 15, 2003Procter & GambleComplex motion toothbrush
WO2003039397A1Nov 7, 2002May 15, 2003Procter & GambleComplex motion toothbrush
U.S. Classification15/28
International ClassificationA61C17/26, A61C17/16
Cooperative ClassificationA61C17/26
European ClassificationA61C17/26