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Publication numberUS958371 A
Publication typeGrant
Publication dateMay 17, 1910
Filing dateJun 12, 1909
Priority dateJun 12, 1909
Publication numberUS 958371 A, US 958371A, US-A-958371, US958371 A, US958371A
InventorsDavid H Danek
Original AssigneeDavid H Danek
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
US 958371 A
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Description  (OCR text may contain errors)


Patented May 17, 1910.



Specification of Letters Patent.

Patented May 17, 1910.

Application filed June 12, 1909. Serial No. 501,771.

To all whom it may concern:

Be it known that I, DAVID H. DANEK, a citizen 'of the United States, residing at Chicago, county of Cook, and State of Illinois, have invented certain new and useful Improvements in Tooth-Brushes, of which the following is a specification.

My invention relates to improvements in tooth brushes, the object of the invention being to provide a tooth brush so designed that it may be readily turned or oscillated on a longitudinal axis in the mouth giving the bristles of the brush an up and down motion relative to the teeth.

A further object of my invention is to arrange the plurality of tufts of bristles of the brush in a row, the pointed tip of each tuft being so spaced that they will readily enter the teeth interstices and so arranged that all of which may contact simultaneously with the teeth and at substantially the same pressure, whereby the cleansing action will be uniformly distributed and the Wear minimized on the more exposed surfaces of the teeth enamel.

A further object of my invention is to provide stiff or coarse bristles composing the central portion of each tuft, this provision being made since stronger bristles are required to cleanse the teeth adjacent the interstices thereof.

A further object of my invention is to provide such a curvature of that portion of the brush handle in which the bristles are secured that the brush may readily enter the mouth for brushing the molar teeth.

A further object of my invention is to provide means to be incorporated in the handle of the brush whereby any particular brush may be identified. And a further object is to provide such a shape of handle that the thumb and palm of the hand may conform thereto. Other objects will appear hereinafter.

With these objects in view my invention consists in the novel construction and arrangement of parts which will be hereinafter described and more particularly pointed out in the appended claims.

My invention will be more readily understood by reference to the accompanying drawings forming a part of this specification, and in which, Figure 1 is a side elevation of my improved tooth brush in its preferred form, Fig. 2 is a transverse section thereof taken on line yy of Fig. 1, Fig.

3 is side elevation of a modified form of tooth brush, Fig. 4 is a transverse section taken on line 2-2 of Fig. 8, Fig. 5 is a planview of the modified form of tooth brush, and Fig. 6 is a plan view of the preferred form shown in Fig. 1.

Referring now tothe drawings, 1 designates the tooth brush handle and 2 the perforation provided in the same .at one extremity there of whereby the brush may be hung on a hook when not in use. The enlarged curved portion 3 of the handle is shaped to conform to the contour of the palm of the hand, and a cavity or depression 4: is provided at or near the center of the handle to receive the ball of the thumb, thus preventing the handle from slipping in the hand. A band 5 of inlaid colored material is provided in the tooth brush, so that brushes kept together having bands of different colors may be readily identified. The portion 6 of the handle is curved as shown in order that it may readily enter the mouth, the section shown in Fig.2 being preferred since the bristles of the tufts 7 which have conical tips 8 may be all of approximately the same length.

It will be seen'that the tuft 7 is shorter than the tuft 7, the object of this construction being to allow a free and easy action in the mouth. The preferred form of handle and arrangement of tufts is such that. the tips of the tufts 7 and 7 will lie in a straight line 0ax passing through the center 3 of the curved portion 3. This shape is provided in order that the brush may be conveniently held in the hand when the teeth are beingbrushed.

In the modified form of tooth brush the handle 9 is similar to that of the preferred form except the portion in which the bristles are set is preferably as shown in Fig. 4, the fiat surface 9 being parallel to the V-shaped ridges of the tufts of bristles. The tuft 10 in this brush is similar to the tuft 7 in the preferred form, which together with the other tufts have central. stiff coarse bristles.

It will be observed that the tips of the tufts in which brush are so spaced as to 'enter the teeth interstices in the most natural manner and that the handle is so formed that a rotary motion of the brush is permissible.

Various slight changes might be made in the general form and arrangement of parts described without departing from my invention and hence I do not restrict myself to the precise details set forth, but consider myself at liberty to make such changes and alterations as fairly fall within the spirit and scope of the appended claims.

Having described my invention What I claim as new and desire to secure by Letters Patent is:

1. In a tooth brush, a handle and laterally extending bristles arranged adjacent one endthereof, said bristles being arranged in tufts and the center of each tuft being formed of relatively stiff and coarse bristles said centers of the tufts being spaced regular distances apart to readily fit between the teeth, substantially as described.

2. In a tooth brush, a handle and laterally extending bristles arranged adjacent one end thereof, said bristles being arranged in tufts and each tuft being formed with relaw tively coarse and stiff bristles extending L from side to side thereof forming transverse parallel rows of stifi bristles spaced at regular intervals apart and adapted to enter between the teeth, substantially as described.

In testimony whereof I- have signed my

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2690579 *Jan 12, 1951Oct 5, 1954Robert G BackstromToothbrush
US4268933 *Nov 30, 1979May 26, 1981Sophia PapasBristles for an interproximal and periodontal toothbrush
US4979782 *Jun 13, 1989Dec 25, 1990Coronet-Werke Heinrich Schlerf GmbhProcess and apparatus for production of bristle products
US5046212 *Jan 25, 1990Sep 10, 1991Conke James R OToothbrush
US5165761 *Dec 30, 1991Nov 24, 1992The Procter & Gamble CompanyMethod of making improved toothbrush having multi-level tufts with substantially uniformly rounded bristle ends in each tuft
US5224763 *Dec 30, 1991Jul 6, 1993The Procter & Gamble CompanyMethod of fastening bristle tufts to bristle carrier
US5305489 *Apr 13, 1993Apr 26, 1994Lage Gregg LErgonomic topographic toothbrush
US5511275 *May 16, 1995Apr 30, 1996The Procter & Gamble CompanyToothbrush exhibiting three-dimensional bristle profile and end rounded bristles for improved interproximal cleaning without increasing gum irritation
US5628082 *Mar 22, 1995May 13, 1997Colgate-Palmolive CompanyToothbrush with improved efficacy
US5758383 *Dec 10, 1996Jun 2, 1998Colgate-Palmolive CompanyContouring toothbrush head
US5896615 *Apr 28, 1997Apr 27, 1999Colgate-Palmolive CompanyInterdental brush
US5926897 *May 10, 1996Jul 27, 1999The Procter & Gamble CompanyToothbrush having bristles for interproximal cleaning
US5980145 *Oct 11, 1994Nov 9, 1999Griffith; PatrickDisposable toothbrush
US6073299 *Jul 12, 1999Jun 13, 2000Colgate-Palmolive CompanyContouring toothbrush head
US6108849 *Aug 15, 1996Aug 29, 2000Coronet-Werke GmbhToothbrush having a resilient neck and conical brush bundles
US6178583May 28, 1999Jan 30, 2001The Procter & Gamble CompanyToothbrush having bristles for interproximal cleaning
US6314606Oct 22, 1999Nov 13, 2001Colgate-Palmolive CompanyContouring toothbrush head
US6442787Jul 3, 2001Sep 3, 2002Colgate-Palmolive CompanyContouring toothbrush head
US6496999Feb 2, 2000Dec 24, 2002John O. Butler CompanyToothbrush with bristle configuration adapted for cleaning tooth surfaces and interproximal areas
US6996870Apr 1, 2002Feb 14, 2006Colgate-Palmolive CompanyContouring toothbrush head
US7721376Dec 23, 2004May 25, 2010Colgate-Palmolive CompanyOral care implement
US7823243Apr 25, 2005Nov 2, 2010Colgate-Palmolive CompanyToothbrush
US7908699Dec 23, 2004Mar 22, 2011Colgate-Palmolive CompanyOral care implement
US8079110May 26, 2010Dec 20, 2011Colgate-Palmolive CompanyOral care implement
US8393042Oct 9, 2009Mar 12, 2013Colgate-Palmolive CompanyOral care implement
US8561247Jun 17, 2011Oct 22, 2013Colgate-Palmolive CompanyOral care implement
WO1998005241A1 *Aug 1, 1997Feb 12, 1998David Victor CannA toothbrush
Cooperative ClassificationA46B2200/1066