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Publication numberUS2274042 A
Publication typeGrant
Publication dateFeb 24, 1942
Filing dateNov 18, 1939
Priority dateNov 21, 1938
Publication numberUS 2274042 A, US 2274042A, US-A-2274042, US2274042 A, US2274042A
InventorsCosby Eric Leopold Hugo
Original AssigneeCosby Eric Leopold Hugo
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Tooth and like brushes
US 2274042 A
Abstract  available in
Images(2)
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Claims  available in
Description  (OCR text may contain errors)

Feb. 24, 1942. E. l.. H. sv A 2,274,042

TOOTH`AND LIKE BRUSHES Filed Nov. 18, 1939 2 Sheets-Sheet 1 wl In x 1CD y l "NF/, [i C i 1 1mm/TOR: A l

i {ERlCLfoPal-DHUGD COSBY HTTORNEYI.

` Feb. 24, 1942. I E, L, H cosBY 2,274,042

TOOTH AND LIKE4 BRUSHES Filed Nov. 18, v1939 2 Sheets-Sheet 2 vvswwk'. 1Q Eme LeovoLD ma@ Cosf HTTORNEYS,

Patented Feb. 24, 1942 Eric Leopold Hugo Cosby, London, England Application November 18, 1939, Serial No. 305,184 In Great Britain November 21, 1938 3 claims.

With certain types of tooth, palate plate and like brushes, it is usual to trim the bristles or tufts of Ibristles to different lengths or with an undulating surface, so that some of the bristles or tufts project beyond the other bristles or tufts. Now the stiffness of a bristle depends on the quality and length of a bristle, that is to say a short bristle of one quality is comparatively stiff, Whilst a long bristle of the same quality is more flexible and therefore soft, and consequently to make a brush of this type with equal stiffness throughout the bristles or tufts of bristles, it is necessary to use different qualities of bristles for the short and for the long, and the object of this invention is to make it possible for the bristles or tufts of bristles to be of equal stiffness Without having to use different quality of bristle to Iattain this aim.

According to this invention, the face of the stock of the brush in which the bristles are inserted is of different levels and the bristles or tufts of bristles are trimmed to the same length, whereby a brush of undulating surface is provided in which the bristles or tufts of bristles are all of the same stiffness and can be of the same quality.

The invention will be clearly understood from the following description aided by the examples shown on the accompanying drawings, and in which:

Figure 1 is a plan, Figure 2 a side view partly 'in section, and Figure 3 a section on the line III- III of Figure l showing one example of the invention.

Figure 4 is a plan, and Figure 5 a section on the lines V-V, Figure 4 showing a section example.

Figure 6 is a similar section to Figure 5 showing a modified construction.

Figure 7 is a side view, FigureV 8 a plan, and Figure 9 a section on the line IX-IX of Figure 7 showing a further example, and

Figure 10 a side View of a still further example. According to the example shown in Figures l to 3 of the accompanying drawings, the stock l of the brush is formed with a raised flat portion la across the end for receiving a projecting portion of tufts of bristles 2, and a central raised flat rib ib` of less height than the portion la for receiving a central row or rows of projecting bristles 2a, whilst the lower flat portions lc of the stock l on each side of the rib Ib receive tufts of bristles 2b.

the same length the end tufts 2 will-project beyond the other tufts for cleaning in between the teeth, the centre row of tufts 2a will project a little beyond the side tufts 2b but not so far as the end tufts 2 and take up the worst of the wear which is along the centre of the brush, and

by trimming the tufts of bristles all to the same length they will be of equal stiffness and can be all of the same quality, and at the same time have the undulations of working surface desired in this type of brush.

In Figures 4 and 5, the front raised portion I a only extends partly across the stock I, so that the lower flat surface lc can extend on each side of the raised portion la to receive tufts of bristles 2b.

In Figure 6 the stock I is formed with the raised front portion la and without the rib lb and the tufts 2b extend all over the flat portion Ic.

In Figures 7 to 9, a slightly different type of brush is shown, in which the upper surface of the stock l is formed with a raised portion la at the tip, ya straight flat portion a behind the raised portionand in a parallel plane therewith, and an angled flat portion b leading into the handle 3, the tufts of bristles being trimmed to the same length.

Figure 10 shows a slight modification of Figure 7 in that the portion of the stock I carrying the bristles is in a straight angled line or slightly curved from the base of the raised front portion la to the handle 3.

Although the shape of the toothbrush varies, equal stiffness of each tuft is possible with one quality of bristle through the toothbrush stock conforming to the shape of the head or bristle or tufts of the brush, and so enables the same Now if all the tufts of bristles are trimmed to length and quality of bristle or tufts to be used throughout.

What I do claim Ias my invention and desire to securev by Letters Patent is:

1. A tooth brush comprising a stock having a raised flat portion adjacent to its end, a relatively depressed portion, and a central rib raised from said depressed portion to a level below said raised portion and extending longitudinally of the stock from said raised portion toward the handle, and tufts of bristles inserted in said raised and depressed portions and ribs, said tufts of bristles being all of the same length and presenting at their outer ends a brushing surface which is undulated longitudinally and transl versely of the brush.

2. A tooth brush comprising a stock having their outer ends a brushing surface which is 10 undulated longitudinally of the brush.

3. .A tooth brush comprising a stock having a raised flat portion adjacent to its end and a flat relatively depressed portion inclined upwardly from the base of said raised portion toward the handle, and tufts of bristles inserted in said raised and depressed portions, said tufts of bristles being all of the same length and presenting at their outer ends a brushing surface Which is undulated longitudinally of the brush.

ERIC LEOPOLD HUGO COSBY.

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2511235 *Jan 27, 1947Jun 13, 1950Samuel B ArwoodToothbrush handle and head construction
US2690579 *Jan 12, 1951Oct 5, 1954Robert G BackstromToothbrush
US3229318 *May 15, 1964Jan 18, 1966Sunbeam CorpToothbrush
US3792504 *Sep 25, 1972Feb 19, 1974D SmithHygienic toothbrush
US4356585 *Apr 8, 1981Nov 2, 1982Protell Martin RHygienic dental appliance
US4670931 *Feb 7, 1986Jun 9, 1987Maliheh AbbassiToothbrush
US4852202 *Jul 21, 1988Aug 1, 1989Ledwitz Kenenth WToothbrush with angled bristles
US5419001 *Mar 29, 1994May 30, 1995Wan; John C.Toothbrush
US5491866 *Nov 5, 1993Feb 20, 1996Simonds; James A.Toothbrush
US6115871 *May 4, 1998Sep 12, 2000Royer; George R.Toothbrush structure with multiple directional bristle portions
US6314605Aug 1, 1997Nov 13, 2001The Procter & Gamble CompanyToothbrush
US6408476Jan 17, 1997Jun 25, 2002The Procter & Gamble CompanyToothbrush with elastomer filled flexible head
US6514445Dec 12, 1997Feb 4, 2003The Procter & Gamble CompanyBrush making
US6851153May 29, 2002Feb 8, 2005James P. LehmanToothbrush
US7707676Jun 30, 2006May 4, 2010The Procter & Gamble CompanyToothbrush
US7962992Dec 23, 2005Jun 21, 2011The Procter & Gamble CompanyToothbrush with elastomer filled flexible head
US8327492May 16, 2011Dec 11, 2012The Procter & Gamble CompanyToothbrush with elastomer filled flexible head
US8584299Jul 25, 2007Nov 19, 2013The Procter & Gamble CompanyElectric toothbrushes
US8955186Oct 15, 2013Feb 17, 2015The Procter & Gamble CompanyElectric toothbrushes
US8997298May 13, 2013Apr 7, 2015Harry KrasnickTransversal cleaning apparatus
US20030221272 *May 29, 2002Dec 4, 2003Lehman James P.Toothbrush
US20040006837 *Jun 20, 2003Jan 15, 2004Cann David VictorToothbrush with elastomer filled flexible head
US20060130257 *Dec 23, 2005Jun 22, 2006Cann David VToothbrush with elastomer filled flexible head
US20060242778 *Jun 30, 2006Nov 2, 2006Solanki Sanjay AToothbrush
US20090025162 *Jul 25, 2007Jan 29, 2009John Geoffrey ChanElectric toothbrushes
US20110185520 *Jul 25, 2007Aug 4, 2011John Geoffrey ChanElectric toothbrushes
DE1273482B *Apr 29, 1965Jul 25, 1968Sunbeam CorpZahnbuerste
DE10331369A1 *Jul 11, 2003Feb 17, 2005Braun GmbhZahnbürste
DE10331369B4 *Jul 11, 2003Sep 16, 2010Braun GmbhZahnbürste
Classifications
U.S. Classification15/167.1
International ClassificationA46B9/04
Cooperative ClassificationA46B9/045, A46B9/04
European ClassificationA46B9/04, A46B9/04A