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Publication numberUS1943225 A
Publication typeGrant
Publication dateJan 9, 1934
Filing dateMay 1, 1933
Priority dateMay 1, 1933
Publication numberUS 1943225 A, US 1943225A, US-A-1943225, US1943225 A, US1943225A
InventorsHarold W Mcintyre
Original AssigneeHarold W Mcintyre
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Toothbrush
US 1943225 A
Abstract  available in
Images(1)
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Claims  available in
Description  (OCR text may contain errors)

Jan" 9, 1934;. H. w MclNTYRE 1,943,225

TOOTHBRUSH Filed May 1, 1933 If. W. Mc/Inyrev INVENTOR ATTORNEY Patented Jan. 9, 1934 UNITED STATES PATENT OFFICE 1 Claim.

This invention relates to toothbrushes and has for the primary object, the provision of a device of this character which will more effectively clean teeth both between the latter and their surfaces and especially the surfaces of the teeth at the margins of the gums to remove film and other foreign matter and to impart a massaging action to the gums for keeping the latter in a healthy condition by stimulating the flow of blood therel0 through and at the margins of the gums.

With these and other objects in view this invention consists in certain novel features of construction, combination and arrangement of parts to be hereinafter more fully described and claimed.

For a complete understanding of my invention, reference is to be had to the following description and accompanying drawing, in which Figure 1 is a side elevation illustrating a toothbrush constructed in accordance with my invention.

Figure 2 is a fragmentary plan View illustrating the same.

Figure 3 is a fragmentary side elevation illustrating the brush applied to teeth.

Figure 4 is a sectional view taken on the line 44 of Figure 1 showing the bristles acting upon and between teeth.

Referring in detail to the drawing, the numeral 1 indicates a handle carrying at one end an integral head 2 tapering slightly towards its free end and rounded at said end. The head 2 has secured thereto rows of tufts of bristles 3 and 4. The rows of tufts of bristles extend parallel with each other arranging the tufts of bristles in pairs as best shown in Figure 2 of the drawing. An intermediate row of tufts of bristles 5 is secured to the head and located between the rows of tufts of bristles 3 and 4 with a tuft of bristles arranged between each pair of tufts of bristles 3 and 4. The tufts of bristles 5 are of a shorter length than the tufts of bristles 3 and 4. The tufts of bristles 3, 4 and 5 have their free ends cut to form oppositely inclined beveled edges with each tuft of bristles provided with a crest indicated at 6. The

crests of the tufts of bristles 3 and 4 extend transversely of the head, while the crests of the tufts of bristles 5 extend longitudinally of the head and. at right angles to the crests of the tufts of bristles 3 and 4.

In operation, the tufts of bristles are forced against the teeth with the tufts of bristles 3 and 4 extending between the teeth and the tufts of bristles 5 contacting with the surfaces of the teeth so that a movement of the brush head with respect to the teeth will cause a thorough cleaning of the teeth both between the latter and their surfaces. During the cleaning of the teeth the movement of the brush head is such that the tufts of bristles 3 and 4 do not move from between the teeth, while the tufts of bristles 5 move over the surfaces of the teeth and the marginal edges of the gums removing film and. other foreign matter and also imparting a massaging action to the gums to stimulate the flow of blood therethrough. It will, therefore, be seen that the teeth at their necks or the portions that enter the gums will be thoroughly cleaned by the tufts of bristles 5, accomplishing a result not heretofore attainable by toothbrushes now in use.

The movement of the toothbrush may be across the teeth and also upwardly and downwardly with respect to the teeth.

While I have shown and described the preferred embodiment of my invention, it will be understood that minor changes in construction, combination and arrangement of parts may be made without departing from the spirit and scope of my invention, as claimed.

Having described the invention, I claim:

A toothbrush including a handle having a head, pairs of tufts of bristles secured to the head in parallel rows, an intermediate row of tufts of bristles secured to the head between the parallel rows of tufts of bristles and with each tuft of bristles of the intermediate row positioned between pairs of tufts of bristles of the parallel rows, said intermediate row of tufts of bristles being of a shorter length than the tufts of bristles of the parallel rows, said tufts, of bristles having their ends cut to form opposite beveled faces and presenting to each tuft of bristles a crest, the crests of the parallel rows of tufts of bristles being arranged transversely of the head, while the crests of the intermediate row of tufts of bristles being arranged longitudinally of the head.

HAROLD W. McINTYRE.

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2567080 *Dec 20, 1946Sep 4, 1951George W PiferToothbrush with divergent sweepaction tuft rows
US2797424 *Oct 20, 1954Jul 2, 1957Olson AlfredToothbrush
US3744078 *Jul 14, 1971Jul 10, 1973J VallisNailbrush
US3843991 *May 9, 1973Oct 29, 1974J VallisNail brush
US4268933 *Nov 30, 1979May 26, 1981Sophia PapasBristles for an interproximal and periodontal toothbrush
US4519111 *Oct 26, 1982May 28, 1985Paolo CavazzaToothbrush having series of bristles of different height
US4679273 *Oct 17, 1986Jul 14, 1987Seth OkinDental appliance for cleansing the gingival one third areas of the teeth as well as the sulcular and the embrasure regions thereof
US5305492 *Nov 3, 1992Apr 26, 1994Optiva CorporationBrush element for an acoustic toothbrush
US5459899 *Dec 7, 1994Oct 24, 1995Bauer; JeromeInterstitial flossing toothbrush
US5862559 *Sep 11, 1997Jan 26, 1999Hunter; FrankToothbrush for interproximal and periodontal pocket cleaning
US6035476 *Jun 17, 1999Mar 14, 2000Optiva CorporationBrushhead for a toothbrush
US6041468 *Mar 12, 1998Mar 28, 2000Colgate-Palmolive CompanyProphy toothbrush
US6202241 *Sep 10, 1998Mar 20, 2001Optiva CorporationBrushhead for use in an acoustic toothbrush
US6851153May 29, 2002Feb 8, 2005James P. LehmanToothbrush
US7941886Sep 19, 2003May 17, 2011Braun GmbhToothbrushes
US8595886Jun 16, 2011Dec 3, 2013Dr. Fresh, LlcBristle configuration
US8943634May 2, 2012Feb 3, 2015Water Pik, Inc.Mechanically-driven, sonic toothbrush system
WO1990003162A1 *Sep 18, 1989Apr 5, 1990Frank HunterImprovements in oral hygiene
WO1994009679A1 *Nov 3, 1993May 11, 1994Optiva CorpA brush element for an acoustic toothbrush
WO2000015075A1 *Aug 16, 1999Mar 23, 2000Optiva CorpImproved brushhead for a toothbrush
Classifications
U.S. Classification15/167.1
International ClassificationA46B9/04
Cooperative ClassificationA46B9/04
European ClassificationA46B9/04