Search Images Maps Play YouTube News Gmail Drive More »
Sign in
Screen reader users: click this link for accessible mode. Accessible mode has the same essential features but works better with your reader.


  1. Advanced Patent Search
Publication numberUS2583886 A
Publication typeGrant
Publication dateJan 29, 1952
Filing dateOct 17, 1947
Priority dateOct 17, 1947
Publication numberUS 2583886 A, US 2583886A, US-A-2583886, US2583886 A, US2583886A
InventorsSchlegel Alvin J
Original AssigneeSchlegel Alvin J
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Power-driven toothbrush with demountably supported rotary brushes
US 2583886 A
Abstract  available in
Previous page
Next page
Claims  available in
Description  (OCR text may contain errors)

Jan. 29, 1952 A 1 SCHLEGEL 2,583,886


t Application octoteriv, 1947, Serial No; 780,375

This invention relates to a driven rotary toothbrush adapted for use in efficiently and properly cleaning the teeth and more particularly has reference to a rotary toothbrush of extremely simple construction capable Aof being driven from a suitable power source for revolving two rotary brushes in opposite directions so that in operation the two brushes f will simultaneously clean the upper and lower teeth in a correct and approved manner and by the movement of the bristles of the brushes longitudinally away from the gums. i y

More particularly, an aim of the invention is to provide a rotary toothbrushnadapted tobe actuated by an electric motor` contained Within the handle portion thereof for simultaneously driving the two rotary brushes in opposite directions.

A still further object` of the invention is to provide a rotary toothbrush having a `novel brush containing head by means of` which the rotary brushes may be readily removed and replaced.

Other objects and advantages of the invention will hereinafter become more fully apparent from the following description of the drawing, illustrating a presenthr preferred embodiment thereof, and wherein: A j. Y Y

Figure 1 is a top plan view,l partly inA section of the rotary toothbrush;

Figure 2 is a side elevationalvview thereof; y

Figure 3 is a cross sectional view taken substantially along a plane as indicated by line 3-.-3 of Figure 2; ,l y

Figure Ll is anendlevational view looking toward the head" of the brush;

Figure 5 is a perspective view of the detachable head section of the brush, and j Y Figure 6 is a fragmentary perspective view of another portion of the rotary toothbrush.

Referring more specifically to the drawing, the rotary toothbrush comprising the invention is designated generally 1 and includes a housing, designated generally 8 which may be formed of plastic or any other suitable material and which includes a hollow handle portion 3 in which is flxedly positioned a small electric motor I having a driven shaft II projecting from one end thereof towards an enlarged, open inner end of the handle 9 and to which is keyed a pinion I2. The opposite, outer end of the handle 9 is provided with a boss I3 through which the electric conductors I4, connected to the motor I0 extend and which are adapted to be connected to any suitable source of electric current. not shown, such as a conventional electrical outlet, for energizing 1 claim; (cl. `15-23) the motor I0. The housing 8 also includes an elongated, substantially dat hollow shank I5 which is provided with a substantially circular head I8 adjacent one end thereof which is threadedly connected, detachably at I1 through the enlarged open inner end of the handle 9. 'The head I6 is provided with a wall or partition I8 through which spaced bushings or bearings I9 extend' and in which are journaled the shafts 20 and 2 I. The shafts 20 and 2l have meshing gears 22 keyed thereto and disposed in the hollow outer end of the head I6 and said shaft 20 extends beyond the gears 22 into the handle 9 and has a gear 23 keyed thereto which meshes with the pinion I2 so that the shafts 20 and 2l are driven by the motor shaft I I and in opposite directions, The shank I5 is provided adjacent its opposite end with a transverse wall 24 having openings 25 extending therethrough in which are journaled corresponding coupling members 26 which aresuitably connected to or formed integral with the opposite ends of the Shafts 20 and 2I and which are provided at their outer ends with flattened extensions or key 21. t

The housing 8 also includes a brush head, designated generally 28 formed of sections 29 and 30. The section 29 preferably forms an integral extension of the last mentioned end of the shank I5 and includes a bottom portion andupwardly curved side walls 3 I. The section 30 comprises a bottom 32 the upper side of which is longitudinally grooved at 33, as clearly illustrated in Figure 3 and as seen in 32. Section 3D also includes upwardly curved side walls 34 and an outer end wall 35.` The head section 30 nts into the head section 29 and with the bottom 32 thereof resting on the bottom of the section 23, as seen in Figure 3 and with the side walls 34 disposed Within the side walls 3|. The side walls 3l are provided with inwardly opening recesses or indentations 36 and the side walls 34 are provided with outwardly projecting teats or projections 31. The walls 3l and 34 are preferably resilient so that the teats 31 can project into the indentations 36 for detachably connecting the head sections 29 and 30 and by spreading the walls 3I said projections 31 can be disengaged from the indentations 36 for disconnecting said head section 30. A pair of rotary brushes 38 are disposed longitudinally within the head section 30 and substantially concentrically of the longitudinal grooves 33 thereof, into which portions of the brushes 38 proj ect and said brushes include shafts 33 which extend axially therethrough and which have corresponding ends thereof journaled in bearing portions 40 of the 'the electric current, it will beY readily obvious that said brushes will be revolved by the `shafts 20 and V2| in opposite directions as indicated byY It will also be apparent` arrows 42 in FigureV 3. that approximately a half of each of the brushes 38 projects frorn the open y'side of the headiZBf and is in an exposed position so that when the brush head 28 is placed Within the mouth the` exposed half ofk one of tlife brushes 38 will engagethereover for Wettingj or rinsing the brushes.

Itiwillalso be 'readily apparent that the head section :30 and brushes v38 carried thereby may beremoved andreplaced by another head section 30 `containing lbrushes38 and the detached head sections 2 9 and 30 maybe effectively cleaned and' maintained in a sanitary condition; Because *ofV the detachability of the head sections and the ease with which they may becleaned, diierent users, each with his 'own 'head section 30 and vbrushes carried thereby, may utilize ,the remainder of the toothbrush l.

"Various modi'cations "and changes are con? templ'ated and may obviously be resorted to, without departing from the spirit or scope of the invention as hereinafter dened by the'appe'nded claim.

1 AI-claim as niy'invention: Y

cluding-an 'elongated shank portion, a pair of shafts extending longitudinally through and journaled in the shank portion, Vrneansgdriving said shaftsin opposite directions, ahead formingan end Vof thehousingandprojecting from one end'of the shank portion and into which 'correi A sponding'ends of the shafts extend, said head having anopen top and including a demountable section and asection formed integral with the shank portionjeach of said head sections includ- A rotary toothbrush comprising a housing in#-v ing a bottom and upwardly extending outwardly bowed side walls, said demountable section having an outer endvprovided with an integral end wall having .laterally spaced bearing openings and an open opposite innerend, said integral head'section having an inner end closed by said end 0f .the shank portion and having an open fo'ut'e'r .ndirthfoug'h which theieinfountable head section is inserted into or removed from the integral head section, a pair of rotary brushes disposed in the demountable head section each incldi'ngia shaft, corresponding ends of said brush shaftsfbein'g `journaled in said bearing openings for supporting and journaling the rotary brushesV in the demountable head section, saidside walls`V of the head sections being resilient, the side walls V"of thelclemointable head section having outwardly vprojecting studs, the side walls Yof the integralheadsection having openings to receive the studs for detachably latching the demountable jhead section in the Yintegral headse'ctiom said -rs't Ymentioned shafts and said brush shafts having adjacent ends provided with "interengafging tongue and groove means for keying the 'first mentioned shafts to the brush shafts, said demountablehead sectionbeing insertable into and removable from integral "head section in l directions longitudinally of "-the shank portion for coupling and uncoupling' the rst Vmentioned shafts and the 'brush 'shaftsfand said interengaging studs and openings of `AAthe side vwalls latching the head sections together and the first mentioned shafts Van'dlast mentioned shafts vvin coupled engagement, the ,outer end of the '-demountable head section forming vthe outer end of 'said head. Y


REFERENCES YCITED The Vfollowing references are of record inthe nie of this patent:


1,172,792 Hammel Feb. -242, 1916 1,340,093 Wes'thafer Mayll, 1920 1,434,436 Goi Now-7, A11922- 1503,050 Jurk et al. f July 29,1924 1,510,116 Van Meter f Sept. 30, -1924 1,620,990 Brothers Mar. y15,"192'7 y1,901,503 lFess'e'niien Mar.1'4,.1933 2,044,344 ABignall .June 16, 1936' 2,124,145 Merkel July ll-9, 193

FREIGN `PATENTS Number Country Date 631,543 France Dec. 22, 1927 656,246

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US1172792 *May 25, 1915Feb 22, 1916Leo A HamelTooth-brush.
US1340093 *Jul 29, 1918May 11, 1920Westhafer James SToothbrush
US1434436 *May 13, 1920Nov 7, 1922Goff Harold WheelerToothbrush
US1503050 *Feb 1, 1922Jul 29, 1924Jurk August HRotary toothbrush
US1510116 *Apr 17, 1922Sep 30, 1924Arthur Lee Van MeterPolishing or buffing device
US1620994 *Jan 22, 1926Mar 15, 1927Eduardo BustamanteDevice for firing cannons
US1901503 *Sep 27, 1928Mar 14, 1933Fessenden Reginald ARotary brush
US2044344 *Mar 21, 1934Jun 16, 1936Bagnall Vernon BRotary tooth brush
US2124145 *Oct 18, 1934Jul 19, 1938Merkel Jr JohnMotor driven rotary tooth brush
FR631543A * Title not available
FR656246A * Title not available
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2691182 *Oct 26, 1951Oct 12, 1954Calvin U BaizeTriple action spiral toothbrush
US2739327 *Aug 24, 1953Mar 27, 1956Blair Paul HPower-operated toothbrush
US3028614 *Dec 31, 1956Apr 10, 1962Bristow Willard HElectric brush
US3813720 *Dec 4, 1972Jun 4, 1974Sylvie APower-driven rotary brush
US3927434 *May 14, 1973Dec 23, 1975Fred M BurgessWater powdered rotary brush
US4313237 *Mar 18, 1980Feb 2, 1982Smith Eric LDriven rotary toothbrush
US5088145 *Mar 26, 1990Feb 18, 1992Whitefield Robert OElectrically powered toothbrush
US5269038 *Aug 16, 1991Dec 14, 1993Bradley Terry GRocker toothbrush
US5337435 *Sep 18, 1992Aug 16, 1994Krasner Janet HAutomatic toothbrush
US5398366 *Sep 10, 1993Mar 21, 1995Bradley; TerryRocker toothbrush
US5428855 *Jul 11, 1994Jul 4, 1995Li; Raui-LongRotatable toothbrush
US6389634Oct 20, 1999May 21, 2002Gillette Canada CompanyOral devices
US6823554Oct 5, 2000Nov 30, 2004Gillette Canada CompanyOral devices
US7316044 *Oct 13, 2005Jan 8, 2008Huy NguyenToothbrush having counter-rotating heads
US7941886May 17, 2011Braun GmbhToothbrushes
US8448283 *Jan 13, 2009May 28, 2013Patrick ArnouxToothbrush with dual rotary brushing system
US8516642Feb 21, 2012Aug 27, 2013King Fahd University Of Petroleum And MineralsCurved-head electric toothbrush
US8584292 *Dec 1, 2011Nov 19, 2013Sam DjangDual rotating electric toothbrush
US8621698Apr 6, 2011Jan 7, 2014Braun GmbhToothbrushes
US8701236 *Sep 21, 2010Apr 22, 2014Sherman PegrossElectric toothbrush
US9204949Dec 17, 2013Dec 8, 2015The Gillettte CompanyToothbrushes
US20040128784 *Dec 16, 2003Jul 8, 2004Ramy WeitzToothbrush with longitudinal to lateral motion conversion
US20050060822 *Sep 19, 2003Mar 24, 2005Chenvainu Alexander T.Toothbrushes
US20080052845 *Sep 5, 2007Mar 6, 2008Djang Sam SCylindrical dual rotating electric toothbrush
US20110067187 *Sep 21, 2010Mar 24, 2011Sherman PegrossElectric toothbrush
US20110113576 *Nov 17, 2009May 19, 2011Yankell Samuel LToothbrush with movable head
US20110138552 *Jan 13, 2009Jun 16, 2011Dental Revolution LtdToothbrush with dual rotary brushing system
US20110179595 *Jul 28, 2011Chenvainu Alexander TToothbrushes
US20140325771 *Nov 16, 2012Nov 6, 2014Patrick ArnouxToothbrush apparatus having multiple rotatable brushing systems
EP0046521A1 *Aug 3, 1981Mar 3, 1982Giosuč Mario LazzariA powered rotating device for teeth cleaning
EP0206574A1 *Jun 3, 1986Dec 30, 1986David V. MollenhoffRotary electric toothbrush
WO1987000405A1 *Jul 22, 1986Jan 29, 1987Elio GrittiToothbrush with rotary brushes
U.S. Classification15/23, 15/167.1
International ClassificationA61C17/26, A61C17/16
Cooperative ClassificationA61C17/349, A61C17/26
European ClassificationA61C17/26, A61C17/34B