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Publication numberUS2722703 A
Publication typeGrant
Publication dateNov 8, 1955
Filing dateNov 28, 1952
Priority dateNov 28, 1952
Publication numberUS 2722703 A, US 2722703A, US-A-2722703, US2722703 A, US2722703A
InventorsMyron B Green
Original AssigneeMyron B Green
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Protective guard for toothbrush
US 2722703 A
Abstract  available in
Images(1)
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Claims  available in
Description  (OCR text may contain errors)

Nov. 8, 1955 M. B. GREEN 2,722,703

PROTECTIVE GUARD FOR TOOTHBRUSH Filed Nov. 28, 1952 INVENTOR. MYRON B. GREEN u/ma #cm/ ATTORNEYS United States Patent PROTECTIVE GUARD FOR TOOTHBRUSH Myron B. Green, Minneapolis, Minn. Application November 28, 1952, Serial No. 322,924

6 Claims. (Cl. 15-143) The present invention relates to improvements in a protective guard for a toothbrush. In general it relates to a guard structure for use with a toothbrush to prevent fluids on the bristles from flowing to the handle and also acts to prevent the bristles from coming in contact with a surface on which the brush may be laid. In particular it relates to a guard having a dual function of protecting the bristles of a toothbrush from coming into contact with a contaminating surface when the brush is either laid or accidentally dropped on the surface and which further acts to prevent fluids such as suds or saliva from flowing from the bristles onto the hand of a person using the brush.

In the active use of a toothbrush, several factors enter into its use other than the mere scrubbing of teeth. Frequently, fluids on the brush will flow down the handle onto the hand of the user and under certain conditions this may be highly annoying. Furthermore, when a person has completed use of a brush and attempts to lay the same onto a supporting surface such as a wash stand, it is desirable that the bristles be held in spaced relation to the wash stand to prevent contamination of the bristles. Still further, almost everyone has experienced the annoyance of accidentally dropping a toothbrush, and if the same descends to the floor it is highly desirable that the bristles be held in such a manner as to avoid contact and contamination by the floor surface.

My present invention incorporates a guard which may be attached to a toothbrush but is preferably formed integral with the toothbrush handle. A particular feature of the guard is that it has an oil? center relationship with the brush handle so as to always cause rotation of the brush handle in such a manner as to hold the bristles in spaced relation to any surface with which the brush may come into contact. Another feature is that the guard is composed of a pair of such cams interconnected with each other to form a double barrier between the bristles and the handle, which will prevent any fluid from creeping over the double cam surface to the handle.

An object of the invention is to provide in combination with a toothbrush, of aguard in the form of an off center cam which is capable of holding the bristles in spaced relation to any surface on which the brush may be laid and for causing rotation of the brush with respect to a contacting surface to always hold the bristles away from contact with the surface.

Another object is to provide an eccentric shaped off center cam which acts as a guard between the bristles of a toothbrush and its handle and to cause rotation of the brush when the latter comes into contact with a surface so as to hold the bristles away from the surface.

Another object is to provide a guard in the form of two interconnected cams which are mounted in off center relationship to a toothbrush handle to prevent fluids from flowing from the bristles to the handle and also cause rotation of the brush when the latter comes into contact with a surface to hold the bristles away from contaminating contact with said surface.

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Other and further objects may become apparent from the following specification and claims, and in the appended drawings in which:

Fig. 1 is a side elevation of a toothbrush incorporating my invention;

Fig. 2 is an enlarged cross section taken on line 22 of Fig. 1 showing one form of toothbrush guard; and,

Fig. 3 is a view similar to Fig. 2 of a modified form of guard such as is shown in Fig. 1.

Referring now to the drawings, general reference numeral v10 indicates a toothbrush including a handle portion 12 having an aperture 14 at one end to support the brush on a hook, and a curved forward end 16 that supports a plurality of. tufted bristles 18 on one lateral side of the handle 12.

A guard indicated by general reference character 20 is placed on the handle at the center of balance and yet far enough away from the bristles 18 to prevent any possibility of interfering with the proper brushing of the teeth. The guard is preferably formed integral with the handle as it is desirable that it be situated at about the point of balance between the opposite ends of the handle. Guard 20 is composed of cam 22 having a beaded edge 23 and cam 24 having a beaded edge 25. The two cams are spaced from each other and connected by a narrow neck portion 26.

Referring now to Fig. 2, the guard 20 is shown in a slightly enlarged scale. It will be noted that cam 24 is of an eccentric shape and is of a type generally referred to as a heart-shaped cam having -a relatively flat lower surface 28 but with the major portion of the cam 30 extending in the same direction as the bristles 18. It will be further noted that the handle 12does not pass through the center of the cam but rather is in off center relation ship thereto, being on the side closest to the surface 28.

Referring now to Fig. 3 is shown a guard which differs from guard 20 only as to the shape of the cams. Shown in Fig. 3 is a cylindrical cam 32 which-is connected to a similar cam, not shown, by a connecting portion 34. The cam 32 has a beaded edge 33. Like cam 24, cam 32 is secured in an oil? center relationship to handle 12 so as to have its major portion designated by reference character 36 on the same .side of the handle as the bristles 18.

When a toothbrush is inactive use in brushing the teeth, it frequently occurs that fluids, such as water, cleanser or saliva will flow .from the bristles 18 in the direction of the handle portion and will flow onto the hand of the user. Guard 20, whether of the type shown in Fig. 2 or Fig. 3, by being composed of two spaced apart members, will prevent the fluid from flowing to the hands since the beaded edge 33 of cam 22 of Fig. 1 will tend to form a barrier to prevent the fluid from passing across the center connection 26 to the second cam 24, whose beaded edge 25 acts as a further barrier since fluid will not normally pass through the space of the center connection 26 and over the beads 23, 25. Of equal importance is the fact that guard 20, being situatedat the center of balance and having the major portion of each of the cams extending on the same side of the handle .12 as the bristles 18, will act as an eccentric to cause rotation of the handle when laid or droppedona supportingrsurface such as a wash stand or shelf, thereby always turning the brush with the bristles upwardly. The function of the off center guard is of equal importance in the event that the brush is accidentally dropped such as to a contaminated floor surface, since the guard is situated at the balance of the handle the brush will always tend to fall on the guard and by reason of its off center relationship with the handle will cause the handle to'roll over to hold the bristles upwardly and away from contact with the floor. This function is particularly applicable to the guard made up of the heartshaped cams of Fig. 2.

The advantages of my invention reside in the provision of a toothbrush guard which prevents fluids from flowing from the bristles to the hand and also in the provision of an off center relationship with the handle so as to cause the brush to rotate to a position with the bristles held away from a contacting surface when the brush is laid or dropped on said surface.

I claim:

1. A toothbrush including a handle having a. multiplicity of tufted bristles extending from a lateral side at one end thereof, and an off-center cam transversely fixed on said handle, said cam positioned between the opposite ends of the handle at a point where the center of gravity of the assembly is disposed on the side of the center of the cam most distant from the bristles, the major off-center portion of said cam extending from the handle in the same direction as the bristles and forming with the end of the handle opposite the bristles two points of contact to engage a plane supporting surface whenever the assembly is positioned with the bristles extending in the direction of said supporting surface.

2. A toothbrush including a handle having a multiplicity of tufted bristles extending from a lateral side at one end thereof, and an off-center cam transversely fixed on said handle with its center of rotation on the same side of the center of gravity of the assembly as the bristles, said cam positioned between the opposite ends of the handle at a point where said center of gravity is disposed on the side of the center of the cam most distant from the bristles, the major off-center portion of said cam extending from the handle in the same direction as the bristles and forming with the end of the handle opposite the bristles two points of contact to engage a plane supporting surface whenever the assembly is positioned with the bristles extending in the direction of said supporting surface, said cam acting to cause rotation of the handle to a position on a supporting surface so that the bristles extend away from said surface.

3. A toothbrush including a handle having a multiplicity of tufted bristles extending from a lateral side at one end thereof, and an eccentric shaped cam mounted in olf-center relationship on the handle with the center of rotation of said cam on the same side of the center of gravity of the assembly as the bristles, said cam positioned between the opposite ends of the handle at a point where said center of gravity is disposed on the side of the center of the cam most distant from the bristles, the major off-center portion of said cam extending from the handle in the same direction as the bristles and forming with the end of the handle opposite the bristles two points of contact to engage a plane supporting surface whenever the assembly is positioned with the bristles extending in the direction of said supporting surface, said cam acting to cause rotation of the handle to a position on the supporting surface so that the bristles extend away from said surface.

4. A toothbrush including a handle having a multiplicity of tufted bristles extending from a lateral side at one end thereof, and a guard consisting of a pair of laterally spaced interconnected cams mounted on said handle in off-center relationship to said handle with the center of rotation of said guard on the same side of the center of gravity of the assembly as the bristles, said guard positioned between the opposite ends of the handle at a point where said center of gravity is disposed on the side of the center of the guard most distant from the bristles, the major off-center portions of said guard extending from the handle in the same direction as the bristles and forming with the end of the handle opposite the bristles points of contact to engage a plane supporting surface whenever the assembly is positioned with the bristles extending in the direction of said supporting surface, said cam acting to cause rotation of the handle to a position on a supporting surface so that the bristles extend away from said surface.

5. A toothbrush including a handle having a multiplicity of tufted bristles extending from a lateral side at one end thereof, and a guard fixed on said handle between the opposite ends thereof consisting of a pair of interconnected cylindrical cams which form a double barrier to prevent fluids from flowing from that portion of the handle having bristles to the other portion of the handle, said interconnected cams being mounted in off-center relationship to the handle with the center of rotation of the guard on the same side of the center of gravity of the assembly as the bristles, said guard positioned between the opposite ends of the handle at a point where said center of gravity is disposed on the side of the center of the guard most distant from the bristles, the major off-center portions of said guard extending from the handle in the same direction as the bristles and forming with the end of the handle opposite the bristles two points of contact to engage a plane supporting surface whenever the assembly is positioned with the bristles extending in the direction of said supporting surface.

6. A toothbrush including a handle having a multiplicity of tufted bristles extending from a lateral side at one end thereof, and a guard fixed on said handle between its opposite ends consisting of a pair of interconnected eccentric shaped cams which form a double barrier to prevent fluids from flowing from that portion of the handle having the bristles to the other portion of said handle, said interconnected cams being mounted in off-center relationship to the handle with the center of rotation of said guard on the same side of the center of gravity of the assembly as the bristles, said guard positioned between the opposite ends of the handle at a point where said center of gravity is disposed on the side of the center of the guard most distant from the bristles, the major ofl-center portions of said guard extending from the handle in the same direction as the bristles and forming with the end of the handle opposite the bristles points of contact to engage a plane supporting surface whenever the assembly is positioned with the bristles extending in the direction of said supporting surface, said guard acting to cause rotation of the handle to a position on a supporting surface so that the bristles extend away from said surface.

References Cited in the file of this patent UNITED STATES PATENTS 1,501,020 Small July 8, 1924 1,871,523 Howard Aug. 16, 1932 2,307,493 Davidson Jan. 5, 1943 FOREIGN PATENTS 717,287 France of 1931 750,214 France of 1933

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US1501020 *Sep 22, 1923Jul 8, 1924Nancy Maria SmallToothbrush shield attachment
US1871523 *Nov 15, 1930Aug 16, 1932Howard Jacob VSyringe
US2307493 *Feb 17, 1941Jan 5, 1943Davidson Nathan JToothbrush
FR717287A * Title not available
FR750214A * Title not available
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3968950 *Apr 10, 1975Jul 13, 1976Gallo George TCombination support and guard for a toothbrush
US4167796 *Aug 21, 1978Sep 18, 1979Pamphilis Richard L DeMultipurpose cleaning and polishing brush
US4726806 *Jul 24, 1986Feb 23, 1988Hiroshi HukubaElectric tooth-brush
US5507641 *Jun 23, 1994Apr 16, 1996Cline; Michelle T.Device for cleaning an animal's teeth
US5517711 *Aug 10, 1994May 21, 1996Byong Duk ChoiToothbrush
US5628082 *Mar 22, 1995May 13, 1997Colgate-Palmolive CompanyToothbrush with improved efficacy
US5881425 *Sep 3, 1996Mar 16, 1999Recycline, Inc.Recycled and recyclable toothbrush having bristle and handle configurations for improved oral hygiene
US6199821 *Feb 12, 1996Mar 13, 2001Donald D. JobSupport and barrier ring
US6826798 *Oct 25, 2000Dec 7, 2004Urbizu De Cabo Ramon PedroToothbrush
US7007335 *Feb 16, 2000Mar 7, 2006Pierre Fabre SanteToothbrush spontaneously taking up stable equilibrium position on a horizontal support
US7437792 *Sep 15, 2004Oct 21, 2008Jeffrey Matthew PeloEspresso machine cleaning tool
US7594292Sep 15, 2008Sep 29, 2009Jeffrey Matthew PeloEspresso machine cleaning tool
US8943634May 2, 2012Feb 3, 2015Water Pik, Inc.Mechanically-driven, sonic toothbrush system
US9144477Dec 23, 2014Sep 29, 2015Water Pik, Inc.Mechanically-driven, sonic toothbrush system
US9468511Mar 15, 2013Oct 18, 2016Water Pik, Inc.Electronic toothbrush with vibration dampening
US20050210611 *Sep 15, 2004Sep 29, 2005Pelo Jeffrey MEspresso machine cleaning tool
USD370564Mar 22, 1995Jun 11, 1996Colgate-Palmolive CompanyToothbrush
USD380903Apr 19, 1995Jul 15, 1997Colgate-Palmolive CompanyToothbrush
USD628389Dec 23, 2009Dec 7, 2010Colgate-Palmolive CompanyTissue cleaner
USD628808Dec 23, 2009Dec 14, 2010Colgate-Palmolive CompanyToothbrush
EP0174740A1 *Aug 13, 1985Mar 19, 1986Hiroshi HukubaElectric tooth-brush
Classifications
U.S. Classification15/143.1, 15/167.1, 15/248.1
International ClassificationA46B15/00
Cooperative ClassificationA46B15/00, A46B2200/1066
European ClassificationA46B15/00