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Publication numberUS569870 A
Publication typeGrant
Publication dateOct 20, 1896
Filing dateJun 6, 1896
Publication numberUS 569870 A, US 569870A, US-A-569870, US569870 A, US569870A
InventorsEdward Henby Ham- ilton
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
US 569870 A
Abstract  available in
Previous page
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Claims  available in
Description  (OCR text may contain errors)

(No Model.)



No. 569,870. Patented Oct. 20, 1896.



:umauwa. wnnlunrou n c UNITED STATES PATENT FFICE.



SPECIFICATION forming part of Letters Patent No. 569,870, dated October 20, 1896- Application filed June 6, 1896- $erial No.594,497. (No model.) Patented in England October 16,1895.No.19,465.

To all whom it may concern:

Be it known that I, EDW'ARD HENRY HAM- ILTON, a citizen of the United States, residing in the cantonment of Poona, presidency of Bombay, India, have invented a new and Improved Tooth-Brush, (which has been patented in England, No. 19,465, dated October 16, 1895,) of which the following is a full, clear, and exact description.

The object of theinvention is to so combine two tooth-brushes that the combined brushes may be used in the same manner as a single brush and with no more inconvenience, the double brush acting, however, to simultaneously clean the teeth on both the back and front surfaces.

The invention consists in the novel construction and combination of the several parts, as will be hereinafter fully set forth, and pointed out in the claim.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the figures.

Figure 1 is a perspective view of the improved tooth-brush viewed from the back. Fig. 2 is a perspective view of a slightlymodified form of the improved brush viewed from the bottom. Fig. 3 is an end view of the form of brush shown in Fig. 1, and Fig. 4 is a similar view of the form of brush illustrated in Fig. 2.

In carrying out the invention two brushbacks 10 are employed, made of anyapproved material, and these two backs are placed at angles to one another, their bottom faces having opposite inclinations, and the two brushbacks may be connected by a bridge 1l,preferably arched, as shown in Figs. 1 and 3 and the said bridge may also be made of any suitable material, such as spring metal, or it may be made of the same material as that of which the backs are made, or the elevated side edges of the backs may be brought together and firmly secured throughout their entire length, or the two backs may be made integral or from one piece of material. Thus it will be observed that the two backs form a trough of substantially inverted-A shape, closed when the backs are fastened together throughout their length and separated partially when the backs are connected by the bridge 11.

The cleaning material 12, which may be bristles, rubber, or a fiber of any description, or the equivalent of the same, is secured in any suitable or approved manner in the bottom faces of the backs 10, so that the cleaning material 12 of the two backs will face one anotheigand the bottom or working surfaces 13 of the cleaning material of the several backs are inclined in a reverse direction to the inclination of the backs, as shown in Figs. 3 and 4, so that the bristles will be shortest in the upper row of each brush-back and longest in the bottom row, and the upper rows of bristles of the opposing brushes are brought practically to an engagement, and the space is gradually widened between the working surfaces of the two brushes as the lower or longer portions of the bristles are approached.

hen the bridge 11 is employed, it is connected with a handle 14, While the handle in the form of the double brush shown in Fig. 2 connects with the backs 10 where they unite.

It is evident that a brush of this description may be used as conveniently and in the same manner as the ordinary single toothbrush, and that both the back and front surfaces of the teeth will be simultaneously and effectively cleaned.

Having thus described my inventiofi, I claim as new and desire to secure by Letters Patent A tooth-brush comprising two flat backs placed at angles to each other, a bridge 11 connecting said backs and forming an inverted-A-shaped trough, a handle secured to said bridge, and rows of bristles secured in the under faces of said backs and being shortest in the rows adjacent said bridge and longest in the outside rows, said bristles being inclined in a reverse direction to the inclination of said backs, the working surfaces of the rows adjacent said bridge being almost in engagement and the space between said working surfaces being gradually widened as the longer and outer rows are approached, whereby an angular or V-shaped opening is formed by said Working surfaces, as and for the purpose set forth. 7


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Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2528992 *Sep 21, 1946Nov 7, 1950Roy E BarrToothbrush
US4131967 *Jul 1, 1976Jan 2, 1979Northemann Karl HeinzToothbrush
US4449266 *Mar 9, 1982May 22, 1984Noerthemann Karl HeinzToothbrush with two segments of bristles
US4457039 *May 17, 1982Jul 3, 1984Massari BToothbrush with anatomically designed handle
US4570282 *Sep 14, 1984Feb 18, 1986Kaufman Martin HToothbrush
US5228466 *Dec 9, 1991Jul 20, 1993Klinkhammer Ronald WToothbrush
US5351358 *Aug 27, 1992Oct 4, 1994Larrimore BabatuToothbrush
US5355546 *Dec 11, 1992Oct 18, 1994Scheier Paul AToothbrush with resilient flexible bristle support
US5432971 *Oct 5, 1994Jul 18, 1995Chung; Angelika Y. B.Foldable toothbrush
US5839149 *Aug 26, 1996Nov 24, 1998Scheier; Paul A.Toothbrush with resilient flexible bristle support
US7707677 *Apr 3, 2008May 4, 2010Colgate-Palmolive CompanyToothbrush
US8806695Mar 20, 2012Aug 19, 2014Colgate-Palmolive CompanyOral care implement having flexibly supported cleaning elements extending in opposite directions
US9167888Jul 10, 2014Oct 27, 2015Colgate-Palmolive CompanyOral care implement having flexibly supported cleaning elements extending in opposite directions
US20080244849 *Apr 3, 2008Oct 9, 2008Robert MoskovichToothbrush
WO1990001281A2 *Aug 4, 1989Feb 22, 1990Ronald William KlinkhammerToothbrush
WO1990001281A3 *Aug 4, 1989Apr 5, 1990Ronald William KlinkhammerToothbrush
Cooperative ClassificationA46B2200/1066