US2242743A - Toothbrush - Google Patents

Toothbrush Download PDF

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Publication number
US2242743A
US2242743A US273619A US27361939A US2242743A US 2242743 A US2242743 A US 2242743A US 273619 A US273619 A US 273619A US 27361939 A US27361939 A US 27361939A US 2242743 A US2242743 A US 2242743A
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United States
Prior art keywords
tufts
toothbrush
secured
brush
angle
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Expired - Lifetime
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US273619A
Inventor
Donovan W Brown
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Joseph T Mccarthy
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Priority to US273619A priority Critical patent/US2242743A/en
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Publication of US2242743A publication Critical patent/US2242743A/en
Anticipated expiration legal-status Critical
Application status is Expired - Lifetime legal-status Critical

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    • AHUMAN NECESSITIES
    • A46BRUSHWARE
    • A46BBRUSHES
    • A46B9/00Arrangements of the bristles in the brush body
    • A46B9/02Position or arrangement of bristles in relation to surface of the brush body, e.g. inclined, in rows, in groups
    • A46B9/04Arranged like in or for toothbrushes

Description

May 20, 1941. w ow 7 2,242,743

TOOTHBRUSH Filed May 15, 1959 M1 I f iiiiiiliii I Patented May 29, 1941 TOOTHBRUSH Donovan W. Brown, Huntington, Ind., assignor of one-half to Joseph T. McCarthy, Uhicago, Ill.

Application May 15, 1939, Serial No. 273,619

6 Claims.

This invention relates to an improvement in toothbrushes, and more particularly to the arrangement and construction of the bristles of the toothbrush.

One object of my invention is to provide a toothbrush, the bristle tufts of which tend to adapt themselves to the contour of the surfaces of the teeth, and which readily reach into the irregularities found on the surfaces of the teeth as well as the spaces between them.

Another object of my invention is to provide a toothbrush which assists the user in the proper brushing of the teeth.

Another object of my invention is to provide a toothbrush which readily adapts itself to the contour of the surfaces of the teeth, and which enters the irregularities and spaces found between the teeth with the minimum amount of pressure, thus lengthening the life of the bristles.

A more specific object of my invention is to provide a toothbrush having a working surface comprising a series of transverse inverted V- shaped grooves, each constituted by oppositely beveled upper surfaces of bristle tufts secured at an angle to the brush handle and crossing each other intermediate their ends.

Other objects and advantages of my invention will appear more fully from the following description, during the course of which reference is made to the accompanying drawing, in which:

Fig. 1 is a side elevational View of a toothbrush embodying my invention, showing the bristles of the brush in contact with a dental arch;

Fig. 2 is a side elevational view of a toothbrush is indicated in its entirety by reference character I0. It may be seen to comprise a handle portion l2, preferably made of rigid material in accordance with customary practice. The forward or head portion 14 of the handle has secured to it a plurality of outwardly extending tufts l8 of suitable bristles. The head l4 may be dimensioned and shaped to suit the user or manufacturer, and this is true to a certain extent of the bristle tufts IS.

The bristles are constructed and arranged on the head of the brush to provide a series of transverse, broad, inverted V-shaped areas on the working surface, as indicated by the reference character l8. Furthermore, the bristles are arranged at an angle with respect to the brush head and handle so that when working pressure degrees, and the obtuse angle as approximately degrees. These values are the preferable values, and they may be varied somewhat. The tufts are so located with respect to each other that they cross intermediate their ends, and the outer ends are beveled in a manner now to be described.

The working ends of the tufts are beveled to provide the inverted V-shaped working areas previously referred to. The ends 24 of the tufts in row 20 are beveled. toward the handle 12 and the ends 26 of the tufts in row 22 are beveled in the opposite direction, that is, away from the handle. In other words, the bevel may be considered to be in a direction opposite to the direction in which the tuft slopes. The bevels are so designed that the acute angle between the surfaces thereof and a plane passing along the topmost part of the tufts is approximately 25 degrees. The angle included in the V is thus approximately 180 minus 50 or degrees. Here again the values given are the preferred values and may be varied.

The many advantages of the brush of my invention may perhaps be best noted from a consideration of the action of the brush when utilized in brushing the teeth. Referring first to Fig. 1 wherethe brush is illustrated in light contact with the dental arch, it may be noted that the transverse V-shaped grooves are so dimensioned that they fit the tooth contours with considerable accuracy, and that when pressure is applied to the brush, the bristles bend and slide along the surface of the teeth and reach into the irregularities in the individual tooth surfaces and in between adjacent teeth. The pressure required to force the bristles into the position indicated in Fig. 2 is relatively light, because the bristles bend and slide along the surfaces of the teeth. One of each pair of tufts defining an inverted V-shaped groove move in opposite directions. The construction, therefore, eliminates crinkling of the bristles and provides a more perfect working contact by slight bending of the individual bristles of each tuft.

The construction of the toothbrush with a series of relatively broad, transverse, inverted V- shaped grooves facilitates correct brush manipulation when the Charters method of brushing is used. This method, as well known to those skilled in the art, comprises moving the brush up and down.

Maximum cleansing is provided by the angular relation between the tooth surfaces and the bristles, and the bristles adapt themselves to surfaces which are irregular or uneven with a minimum of pressure. A longer brush life is insured because of the slight amount of pressure required and the resulting decreased strain on the bristles. The decrease in pressure likewise eliminates crinkling of the bristles.

The brush also guides itself into the areas needing brushing; that is, the spaces between the teeth and the hollows or irregularities on the surfaces of the teeth. A further advantage of the brush is that the tufts spread out freely during use, thus creating a larger working area.

The above-described embodiment of my invention has been included herein for the purpose of illustration only, and modifications thereof may occur to those skilled in the art. Among these modifications may be mentioned the variation of the angle of the tufts with respect to the brush and the angle included in the transverse grooves. As a matter of fact, certain advantages of my invention may be realized without providing any transverse grooves whatever. Furthermore, instead of having two rows of bristle tufts, a greater number of rows may be utilized.

What I claim as new and desire to secure by United States Letters Patent is:

1. A toothbrush comprising handle and head portions, parallel rows of bristle tufts secured to said head portion and projecting outwardly therefrom, the tufts in one of said rows being secured to the head portion at an acute angle with respect to said handle portion, and the tufts in another row being secured to said head portion at an obtuse angle with respect to said handle, and the outer end of each of said bristle tufts being beveled inwardly in a direction opposite to the direction in which the tuft slopes at an angle such that the working surface is at an acute angle with respect to a plane passing along the outer extremities of the tufts.

2. A toothbrush comprising handle and head portions and parallel rows of bristle tufts secured to said head portion, the tufts in one of said rows being secured to said head portion at an angle opposite to that at which those in a second row are secured to the said head portion, and each tuft in one row crossing a tuft in another row longitudinally of the brush and intermediate the ends of the tufts, and the outer ends of said tufts being beveled in directions opposite to the slope of the tufts to define working surfaces located at acute angles with respect to a plane passing along the outer extremities of the tufts.

3. A toothbrush comprising a handle portion and a head portion, bristle tufts mounted on said head portion providing a working surface consisting of a series of transverse, inverted V-shaped grooves, each groove comprising the tips of a pair of tufts secured at an angle to the brush and crossing each other intermediate their ends, the tips of said tufts being beveled oppositely across the entire widths thereof.

4. A toothbrush comprising handle and head portions, and parallel rows of bristle tufts secured to the head portion and projecting outwardly therefrom, the tufts in one of said rows being secured to the head portion at an acute angle with respect to said handle portion and the tufts in another row being secured to said head portion at an obtuse angle with respect to said handle portion, the outer end of each of said bristle tufts being beveled in a direction opposite to the direction in which the tuft slopes to define plane working surfaces disposed at angles of approximately 25 degrees to a plane passing along the outer ends of the tufts.

5. A toothbrush comprising handle and head portions, and two parallel rows of bristle tufts secured to the head portion and projecting outwardly therefrom, the tufts in one of said rows being secured to the head portion at an angle of approximately degrees with respect to said handle portion and the tufts in the other row being secured to said head portion at an angle of approximately degrees with respect to said handle portion, the outer end of each of said bristle tufts being beveled in a direction opposite to the direction in which the tuft slopes to define plane working surfaces disposed at angles of approximately 25 degrees to a plane passing along the outer ends of the tufts.

6. A toothbrush comprising handle and head portions, and two parallel rows of bristle tufts secured to the head portion and projecting outwardly therefrom, the tufts in one of said rows being secured to the head portion at an angle of approximately 65 degrees with respect to said handle portion and the tufts in the other row being secured to said head portion at an angle of approximately 115 degrees with respect to said handle portion, each tuft in one row crossing a tuft in another row longitudinally of the brush and intermediate the ends of the tufts, and the outer end of each of said bristle tufts being beveled in a direction opposite to the direction in which the tuft slopes to define longitudinally spaced apart plane working surfaces disposed at an angle of approximately 25 degrees to a plane passing along the outer ends of the tufts.

DONOVAN W. BROWN.

US273619A 1939-05-15 1939-05-15 Toothbrush Expired - Lifetime US2242743A (en)

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Cited By (34)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2618801A (en) * 1947-12-01 1952-11-25 Charlie C Hibbs Root and gum stimulator
DE919224C (en) * 1952-03-18 1954-10-18 Carl Ulrich Fehr Dr Toothbrush having arranged transverse to the rows of bristles Buerstenlaengsachse
US3085273A (en) * 1960-10-04 1963-04-16 Laverne M Cowan Toothbrush
US3731336A (en) * 1971-05-03 1973-05-08 J Rubin Toothbrush
WO1992001407A1 (en) * 1990-07-24 1992-02-06 Brice Michael F Twin-headed toothbrush
US5274873A (en) * 1992-04-23 1994-01-04 Shields Melvin A Angulated bristle toothbrush
US5499421A (en) * 1993-06-15 1996-03-19 Brice; Michael F. Twin-headed toothbrush
EP0955837A1 (en) * 1997-11-12 1999-11-17 Gillette Canada Inc. Toothbrush
EP0885573B1 (en) * 1997-06-17 2000-05-03 Trisa Holding AG Head for a toothbrush
WO2000057747A1 (en) 1999-03-29 2000-10-05 Gillette Canada Company Toothbrush
US6308367B1 (en) 1997-11-12 2001-10-30 Gillette Canada Company Toothbrush
US6314605B1 (en) 1996-08-02 2001-11-13 The Procter & Gamble Company Toothbrush
US20020023658A1 (en) * 2000-07-26 2002-02-28 Gueret Jean-Louis H. Device and method for applying product to keratinous fibers
US6408476B1 (en) 1996-01-18 2002-06-25 The Procter & Gamble Company Toothbrush with elastomer filled flexible head
US6514445B1 (en) 1996-12-24 2003-02-04 The Procter & Gamble Company Brush making
US6564416B1 (en) 2000-05-22 2003-05-20 Gillette Canada Company Toothbrush
USD475200S1 (en) 2002-04-01 2003-06-03 Ranir/Dcp Corporation Toothbrush
USD475532S1 (en) 2002-04-01 2003-06-10 Ranir/Dcp Corporation Set of bristles for a toothbrush
US6928685B1 (en) 2001-11-06 2005-08-16 The Procter & Gamble Company Complex motion toothbrush
US20050246847A1 (en) * 2000-06-16 2005-11-10 Brice Michael F Twin-headed toothbrush
US20050268414A1 (en) * 2004-06-03 2005-12-08 Dougjohn Kim Toothbrush
US20060236482A1 (en) * 2003-01-20 2006-10-26 Matthias Georgi Toothbrush
US7269872B2 (en) * 2002-04-12 2007-09-18 Colgate-Palmolive Company Powered toothbrush head
US20070283518A1 (en) * 2006-06-08 2007-12-13 Stephen John Blanchard Toothbrush
US20070283517A1 (en) * 2006-06-08 2007-12-13 Stephen John Blanchard Toothbrush head
EP2098134A1 (en) 2001-10-05 2009-09-09 GlaxoSmithKline Consumer Healthcare GmbH & Co. KG. Toothbrush
US7707676B2 (en) 1999-06-14 2010-05-04 The Procter & Gamble Company Toothbrush
USD628808S1 (en) 2009-12-23 2010-12-14 Colgate-Palmolive Company Toothbrush
US8584299B2 (en) 2003-04-23 2013-11-19 The Procter & Gamble Company Electric toothbrushes
US8595886B2 (en) 2010-06-16 2013-12-03 Dr. Fresh, Llc Bristle configuration
US8951045B1 (en) * 2013-01-02 2015-02-10 Dennis J. White Toothbrush bristle arrangement and method
USD834324S1 (en) * 2017-09-21 2018-11-27 The Gillette Company Llc Toothbrush
USD834325S1 (en) * 2017-09-21 2018-11-27 The Gillette Company Llc Toothbrush handle
USD854333S1 (en) 2017-03-22 2019-07-23 The Gillette Company Llc Toothbrush head

Cited By (56)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2618801A (en) * 1947-12-01 1952-11-25 Charlie C Hibbs Root and gum stimulator
DE919224C (en) * 1952-03-18 1954-10-18 Carl Ulrich Fehr Dr Toothbrush having arranged transverse to the rows of bristles Buerstenlaengsachse
US3085273A (en) * 1960-10-04 1963-04-16 Laverne M Cowan Toothbrush
US3731336A (en) * 1971-05-03 1973-05-08 J Rubin Toothbrush
WO1992001407A1 (en) * 1990-07-24 1992-02-06 Brice Michael F Twin-headed toothbrush
US5121520A (en) * 1990-07-24 1992-06-16 Inter-X Scientific, Inc. Twin-headed toothbrush
US5274873A (en) * 1992-04-23 1994-01-04 Shields Melvin A Angulated bristle toothbrush
US6112361A (en) * 1993-06-15 2000-09-05 Michael F. Brice Twin-headed toothbrush
US5499421A (en) * 1993-06-15 1996-03-19 Brice; Michael F. Twin-headed toothbrush
US20060130257A1 (en) * 1996-01-18 2006-06-22 Cann David V Toothbrush with elastomer filled flexible head
US6408476B1 (en) 1996-01-18 2002-06-25 The Procter & Gamble Company Toothbrush with elastomer filled flexible head
US7962992B2 (en) 1996-01-18 2011-06-21 The Procter & Gamble Company Toothbrush with elastomer filled flexible head
US8327492B2 (en) 1996-01-18 2012-12-11 The Procter & Gamble Company Toothbrush with elastomer filled flexible head
US20040006837A1 (en) * 1996-01-18 2004-01-15 Cann David Victor Toothbrush with elastomer filled flexible head
US6314605B1 (en) 1996-08-02 2001-11-13 The Procter & Gamble Company Toothbrush
US6514445B1 (en) 1996-12-24 2003-02-04 The Procter & Gamble Company Brush making
EP0885573B1 (en) * 1997-06-17 2000-05-03 Trisa Holding AG Head for a toothbrush
EP0955837A1 (en) * 1997-11-12 1999-11-17 Gillette Canada Inc. Toothbrush
EP0955837B1 (en) * 1997-11-12 2003-02-26 Gillette Canada Company Toothbrush
US6308367B1 (en) 1997-11-12 2001-10-30 Gillette Canada Company Toothbrush
US6272714B2 (en) 1999-03-29 2001-08-14 Gillette Canada Company Toothbrush
WO2000057747A1 (en) 1999-03-29 2000-10-05 Gillette Canada Company Toothbrush
US7707676B2 (en) 1999-06-14 2010-05-04 The Procter & Gamble Company Toothbrush
US6564416B1 (en) 2000-05-22 2003-05-20 Gillette Canada Company Toothbrush
US20050246847A1 (en) * 2000-06-16 2005-11-10 Brice Michael F Twin-headed toothbrush
US7363823B2 (en) 2000-06-16 2008-04-29 Nmoc, Llc Twin-headed toothbrush
US20020023658A1 (en) * 2000-07-26 2002-02-28 Gueret Jean-Louis H. Device and method for applying product to keratinous fibers
US7337785B2 (en) * 2000-07-26 2008-03-04 L'ORéAL S.A. Device and method for applying product to keratinous fibers
EP2098134A1 (en) 2001-10-05 2009-09-09 GlaxoSmithKline Consumer Healthcare GmbH & Co. KG. Toothbrush
US6928685B1 (en) 2001-11-06 2005-08-16 The Procter & Gamble Company Complex motion toothbrush
USD475532S1 (en) 2002-04-01 2003-06-10 Ranir/Dcp Corporation Set of bristles for a toothbrush
USD475200S1 (en) 2002-04-01 2003-06-03 Ranir/Dcp Corporation Toothbrush
US7269872B2 (en) * 2002-04-12 2007-09-18 Colgate-Palmolive Company Powered toothbrush head
US7854036B2 (en) 2003-01-20 2010-12-21 Glaxosmithkline Consumer Healthcare Gmbh & Co. Kg Toothbrush
US20060236482A1 (en) * 2003-01-20 2006-10-26 Matthias Georgi Toothbrush
US8955186B2 (en) 2003-04-23 2015-02-17 The Procter & Gamble Company Electric toothbrushes
US8584299B2 (en) 2003-04-23 2013-11-19 The Procter & Gamble Company Electric toothbrushes
US20050268414A1 (en) * 2004-06-03 2005-12-08 Dougjohn Kim Toothbrush
US20070283518A1 (en) * 2006-06-08 2007-12-13 Stephen John Blanchard Toothbrush
US8631534B2 (en) * 2006-06-08 2014-01-21 Dr. Fresh, Llc Toothbrush
US20070283517A1 (en) * 2006-06-08 2007-12-13 Stephen John Blanchard Toothbrush head
USD628808S1 (en) 2009-12-23 2010-12-14 Colgate-Palmolive Company Toothbrush
US8595886B2 (en) 2010-06-16 2013-12-03 Dr. Fresh, Llc Bristle configuration
US9198501B2 (en) 2010-06-16 2015-12-01 Dr. Fresh, Llc Bristle configuration
US8951045B1 (en) * 2013-01-02 2015-02-10 Dennis J. White Toothbrush bristle arrangement and method
USD854331S1 (en) * 2017-03-22 2019-07-23 The Gillette Company Llc Toothbrush head
USD854336S1 (en) 2017-03-22 2019-07-23 The Gillette Company Llc Toothbrush
USD854333S1 (en) 2017-03-22 2019-07-23 The Gillette Company Llc Toothbrush head
USD855998S1 (en) * 2017-03-22 2019-08-13 The Gillette Company Llc Toothbrush head
USD854332S1 (en) * 2017-03-22 2019-07-23 The Gillette Company Llc Toothbrush head
USD854335S1 (en) * 2017-03-22 2019-07-23 The Gillette Company Llc Toothbrush
USD854835S1 (en) * 2017-03-22 2019-07-30 The Gillette Company Llc Toothbrush head
USD855997S1 (en) * 2017-03-22 2019-08-13 The Gillette Company Llc Toothbrush head
USD854334S1 (en) * 2017-03-22 2019-07-23 The Gillette Company Llc Toothbrush head
USD834324S1 (en) * 2017-09-21 2018-11-27 The Gillette Company Llc Toothbrush
USD834325S1 (en) * 2017-09-21 2018-11-27 The Gillette Company Llc Toothbrush handle

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