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.

Patents

  1. Advanced Patent Search
Publication numberUS2305461 A
Publication typeGrant
Publication dateDec 15, 1942
Filing dateDec 29, 1939
Priority dateDec 9, 1938
Publication numberUS 2305461 A, US 2305461A, US-A-2305461, US2305461 A, US2305461A
InventorsSpyra Paul
Original AssigneeSpyra Paul
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Toothbrush
US 2305461 A
Abstract  available in
Images(1)
Previous page
Next page
Claims  available in
Description  (OCR text may contain errors)

- 5, 1942. v P. SPYRA 2,305,451

TOOTHBRUSH Filed Dec. 29, 1939 In van {or Attorneys.

Patented Dec. 15, 1942 roo'rnmwsn Q Paul Spyra, Berlin-Charlottenburg, Germany; vested in the. Alien Property Custodian Application December 29, 1939, Serial No. 311,679

In Germany December 9,1938

6 Claims. ((31. 15-167) The invention relates to tooth brushes. The purpose of the invention is to provide an arrangement of the bristles so as to be well adapted to the form of the teeth and to enable better cleaning of the teeth, especially of the interdentils, than it is possible with tooth brushes or known form and construction.

A further purpose of the invention is to arrange the bristles so as to surround two or more hollow spaces connected with each other. These hollow spaces are able to take up the teeth in such a way that the points-of the bristles will thoroughly clean the most endangered neck of the tooth and the interdentils, and will not press the fur on the teeth into the interdentils. With a tooth brush according to the invention, it is also impossible to injure the surface of the necks of the teeth.

This especially refers to tooth brushes according to the invention, in which the bristles in the bristle crown are quite close to each other, i.e., a closed bristle crown is provided, in contradistinction to an arrangement of the bristles in individual bunches.

Preferably, two bristle crowns are arranged one within the other, adjacent bristles forming from their points an angle with each other. The advantage of this is that the bristle crowns support each other and, therefore, render it more diflicult for the bristles getting bent.

Several constructional examples of a tooth brush according to the invention are illustrated in the accompanying drawing, in which- Fig. 1 is a view of a brush head of a tooth brush according to the invention,

Fig. 2 shows the head of the brush in plan view,

Fig. 3 is a section through the brush head on the line IIIIII of Fig. 2,

Fig. 4 is a diagrammatic view of a somewhat different form of construction,

Fig. 5 is a cross section on the line V-V of Fig. 4,

Figs. 6 to 8 are plan views of three different modifications of the brush arrangement.

The bristle plate I of the brush handle 2 is, in the construction according to Figs. 1 and 2, provided with a bristle crown 3 which, on the side adjacent to the brush handle has an opening 4. The bristles of the bristle crown are arranged in the form of the figure 8, the upper as well as the lower part of the 8 being dimensioned so as to surround one tooth. The 8 of the bristle crown is not closed in the middle but leaves an opening 5 between inwardly extending bristle projections, which opening has the same size as opening i.

The bristles are arranged so as to surround, as will be-seen from Fig. 1, two communicating hollow spaces in the shape of conic frustums. The bristles in the lower part of the 8 may form with the upper part of the 8 a continuous bristle crown, as shown in the constructional example illustrated.

Forproperly cleaning the teeth, it is very important that the bristles in the bristle crown are quite close to each other. This may be achieved in known manner by clamping the bristles together to form a bristle crown. This clamping may, for example, be effected in a metal strip which is then bent, according to the description, to from an 8, and is inserted in the brush head, or, if the 8 is formed by combining two. single bristle crowns arranged closely to each other, by clamping the bristles between two cup-shaped members. The bristles may be put round a wire or a Wire ring between the side portions of. the metal strip or between the cupshaped members. V

In order that the bristles should not so easily get bent in using the tooth brush, the invention provides in a special form of construction two bristle crowns 6, I (Fig. 3), one arranged within the other in such a way that the points of their bristles form an angle. As will be seen from the drawing, adjacent bristles of the bristle crowns of which one surrounds the other, touch at their points but otherwise form an angle. The bristle crown 1 serves as support for the bristle crown 6 and, vice versa, the bristle crown 6 serves as support for the bristle crown 1, according to the direction of the stressing to which the brush is subjected. The constructional form according to Figs. 4 and 5 is identical with the constructional form according to Figs. 1 and 2, with the slight modification of the bristles being arranged substantially vertical on the bristle plate.

The constructional form according to Fig. 6 substantially equals the constructional form according to Figs. 4 and 5, except that at the outer end of the brush at 4a the bristle crown is partly open so that in this place too there are bristle projections 3a extending inwardly. In the simplified constructional forms according to Figs. 7 and 8, there are only two rows of bristles 8, 9 with inwardly extending bristle projections I ll, spaced at a distance in longitudinal direction of the brush in the form shown in Fig. 8.

The tooth brush according to the invention,

1. A tooth brush comprising a handle, a plate on the handle, two rows of bristles on saidplate arranged at a distance from each other, opposed bristle projections extending inwardly of the rows of bristles at the middle of the rows of bristles and at the inner end thereof, the space,

between the bristle projections being" smaller than the maximum distance between the rows of bristles, the rows of bristles adjacent the inner end of the plate and the bristle projections in the middle and at the inner ends of the rows forming a substantially circular space so as to substantially surround cne tooth, and the rows of bristles adjacent the. outer end of the plate and the bristle projections in the middle forming a substantially circular space so as to substantially surround the adjacent tooth.

2. A tooth brush as claimed in claim 1, in which the bristles are arranged vertically.

H 3. A tooth brush as claimed in claim 1, in which the bristles are slightly inclined in an outward direction.

4. A tooth brush comprising a handle, a plate on the handle, two rows of bristles on said plate arranged at a distance from each other, opposed bristle projections extending inwardly of the rows of bristles at the middle of the rows of bristles and at the inner and outer ends thereof, the distance between the bristle projections being smaller than the maximum distance between the rows of bristles, the rows of bristles adjacent the inner end of the plate and the bristle projections in the middle and at the inner end of the rows forming a substantially circular space so as to substantially surround one tooth, and the rows of bristles adjacent the outer end of the plate and the bristle projections in the middle and at the outer end of the rows forming a substantially circular space so as to substantially surround the adjacent tooth.

5. A tooth brush comprising a handle, a plate on the handle, two rows of bristles on said plate arranged at a distance from each other, opposed bristle projections extending inwardly of the rows of bristles at the middle of the rows of bristles and at the inner end thereof, the outer ends of said rows meeting in the form of an arc, the space between the bristle projections being smaller than the maximum distance between the rows, the r'owsof bristles adjacent the inner end of the plate and the bristle projections in the middle and at the inner end of the rows forming a substantially circular space so as to substantially surround one tooth, and the rows of bristles at the outer meeting ends and the bristle projections in the middle of said rows forming a substantially circular space so as to substantially surround the adjacent tooth.

6. A tooth brush comprising a handle, a plate on the handle, two rows of bristles on said plate arranged at a distance from each other and being slightly inclined in an outward direction, opposed bristle projections extending inwardly of the rows of bristles at the middle of the rows of bristles and at the inner end thereof, the outer ends of said rows meeting each other in the form of an arc, the space between the bristle projeotions being smaller than the maximum distance between the rows, the rows of bristles adjacent the inner end of the plate and bristle projections in the middle and at the inner end of the rows forming a substantially circular space so as to substantially surround one tooth, and the rows of bristles at their outer meeting ends and the bristle projections in the middle of said rows forming a substantially circular space so as to substantially surround the adjacent tooth.

PAUL SPYRA.

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US5392483 *Jul 7, 1994Feb 28, 1995Chesebrough-Pond's Usa Co., Division Of Conopco, Inc.Multi-level bristle tuft toothbrush
US5799353 *Nov 27, 1996Sep 1, 1998Sunstar Inc.Toothbrush
US6219875Nov 24, 1999Apr 24, 2001Erika J. MedynskiToothbrush for cleaning teeth with assistance from opposed teeth
US7089621 *Jun 18, 2004Aug 15, 2006Colgate-Palmolive CompanyToothbrush
US7143462Jun 18, 2004Dec 5, 2006Colgate-Palmolive CompanyOral care implement
US7146675 *Apr 14, 2004Dec 12, 2006Braun GmbhHandheld toothbrush
US7213288Mar 25, 2005May 8, 2007Colgate-Palmolive CompanyToothbrush
US7322067Dec 4, 2006Jan 29, 2008Colgate-Palmolive CompanyOral care implement
US7594293Oct 28, 2005Sep 29, 2009Colgate-Palmolive Co.Oral care implement
US7721376Dec 23, 2004May 25, 2010Colgate-Palmolive CompanyOral care implement
US7725980Dec 15, 2004Jun 1, 2010Colgate-Palmolive CompanyOral care implement
US7836539May 5, 2005Nov 23, 2010Colgate-Palmolive CompanyOral care implement
US7908699Dec 23, 2004Mar 22, 2011Colgate-Palmolive CompanyOral care implement
US7950100Oct 31, 2007May 31, 2011Colgate-Palmolive CompanyOral care implement
US7954191Apr 9, 2007Jun 7, 2011Colgate-Palmolive CompanyToothbrush
US7962991Aug 14, 2006Jun 21, 2011Colgate-Palmolive CompanyToothbrush
US7975343Jun 21, 2006Jul 12, 2011Colgate-Palmolive CompanyToothbrush
US8042214Sep 16, 2009Oct 25, 2011Colgate-Palmolive CompanyOral care implement
US8079110May 26, 2010Dec 20, 2011Colgate-Palmolive CompanyOral care implement
US8201298Feb 9, 2007Jun 19, 2012Colgate-Palmolive CompanyToothbrush with low profile head
US8393042Oct 9, 2009Mar 12, 2013Colgate-Palmolive CompanyOral care implement
US8522386May 26, 2011Sep 3, 2013Colgate-Palmolive CompanyOral care implement
US8523888Dec 18, 2006Sep 3, 2013Colgate-Palmolive CompanyOral care implement
US8561247Jun 17, 2011Oct 22, 2013Colgate-Palmolive CompanyOral care implement
US8800091Aug 13, 2013Aug 12, 2014Colgate-Palmolive CompanyOral care implement
US8800093Dec 2, 2011Aug 12, 2014Colgate-Palmolive CompanyOral care implement
US8839481May 7, 2013Sep 23, 2014Colgate-Palmolive CompanyOral care implement
US8876221Aug 23, 2011Nov 4, 2014Colgate-Palmolive CompanyOral care implement
US8990996Oct 8, 2012Mar 31, 2015Colgate-Palmolive CompanyToothbrush
Classifications
U.S. Classification15/167.1
International ClassificationA46B9/04
Cooperative ClassificationA46B9/04
European ClassificationA46B9/04