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Publication numberUS3316576 A
Publication typeGrant
Publication dateMay 2, 1967
Filing dateAug 19, 1965
Priority dateAug 19, 1965
Publication numberUS 3316576 A, US 3316576A, US-A-3316576, US3316576 A, US3316576A
InventorsUrbush Richard L
Original AssigneeScovill Manufacturing Co
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Electric toothbrush
US 3316576 A
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Description  (OCR text may contain errors)

May 2, 1957 R. l.. URBUSH ELECTRIC TOOTHBRUSH Filed Aug. 19, 1965 JHHN N n mm n W IPM., mm E mm vm IAN- I- Ul.

Illlll l vw mm [NVE/WUR. RICHARD L. URBUSH lll! .mm2 mm, mm,

United States Patent 3,316,576 ELECTRIC TOOTHBRUSH Richard L. Urbush, Racine, Wis., assignor to Scovill Manufacturing Company, Waterbury, Conn., a corporation of Connecticut Filed Aug. 19, 1965, Ser. No. 481,020 4 Claims. (Cl. 15-22) This invention relates to electric toothbrushes and more particularly to the brush handle holder which is part of the portable power actuated unit for a toothbrush or the like.

The main object of the invention is to provide a holder into which the handle of a toothbrush or the like can be inserted by a simple pushing motion and withdrawn by merely pulling the brush handle out of the holder without manipulation of any of the holder parts.

Another object is to provide a holder which is self adjustable to receive brush handles of different sizes and shapes and to retain the handles by friction.

Another object is to provide a brush handle holder and means for mounting it in a portable power actuated unit in such manner that moisture is prevented from entering the unit between the holder and the unit casing.

The objects and advantages of the invention will be apparent from the drawings and following description.

In the drawings:

FIG. 1 is a longitudinal vertical sectional view, partly in elevation, of a portable power actuated unit for a toothbrush or the like embodying my invention.

FIG. 2 is a longitudinal vertical sectional view, on an enlarged scale, of the brush handle holder and part of the housing in which it is mounted.

FIG. 3 is a transverse vertical sectional view, on an enlarged scale, in the plane of the line 3 3 of FIG. 1.

In that embodiment of the invention shown in the drawings, the power actuated unit comprises a generally cylindrical casing consisting of an end member 11, intermediate portion 12 having a reduced diameter forward end 13, and a front end casing 14 provided with a central opening 15. The reduced diameter end portion 13 of the the casing 12 is slightly smaller in external diameter than the internal diameter of the front end casing 14 which is retained on the part 13 by a flange 16 engaged in the groove :formed by the projection 17 on the member 13 adjacent its junction with the casing 12.

A conventional toothbrush, shown in FIG. l, comprises the `bristle mounting 18, bristles 19 and handle 20;

The holder for receiving and frictionally holding the brush handle 20 comprises a holder housing 21 cylindrical in form with closed end 22 provided with lan apertured tongue 23, the opposite end being open and provided with external screw threads 24 or other means for holding brush handle clamping means adjacent said open end. Brush handle clamping means located in the holder housing 21 comprises a pair of clamping bars 25 generally rectangular .in cross section, their proximate surfaces being parallel to each other and nearly contacting as sho-wn in FIGS. 1 and 3 when not spaced apart by insertion of a brush handle. The forward ends of the proximate faces of the clamping bars 25 are beveled as indicated at 26 to facilitate placement of a handle 20 between the bars. yPreferably the housing 21 and clamping bars 25 are made of plastic materials, such for example, as Delrin Each clamping bar 25 has attached to its outer side surface a leaf spring 27 having a ilat central portion provided With two apertures, a rearward free end 28 and a forward portion 29 with end hook 30. Each spring 27 is attached to a clamping bar 25 by two rivets 31 counter- 3,3 16,5176 Patented May 2, 1967 sunk at 32 on the proximate sides of the clamping bars 25. The -free ends 28 and 30 of the springs 27 are biased to extend outwardly from the flat portion 27 in divergent directions. The two units are held together by an O-ring 33 located in grooves formed in the outer faces of the clamping bars. Two at pieces of plastic material 34, as long as the bars 25 and as wide as the thickness of the two bars 25 contacting each other, are placed adjacent opposite side edges of the bars to keep them in line. These flat pieces 34 are also held in place by the O-rings 33. The outer surfaces of the parts 28 of the springs 27 bear a-gainst the inner surfaces of the holder housing 21 to urge the clamping bars 25 toward each other. The parts 29 likewise bear on the inner sur-faces of the holder housing 21 to urge the bars 25 toward each other, and the hook ends 30 extend over and engage notches in the open end edge of the housing 21 adjacent the screw threads 24.

After the clamping bars 25 with attached springs 27, side pieces 34 and O-rings 33 have been assembled and placed in the holder housing 21, the assembly is placed in the casing 12 and mounted therein by the following described means: ball bearings 35 in grooves formed in `buttress 36 on the casing 12 and buttress 37 on housing 21; and a sealing sleeve 38 of flexible or other suitable material shaped to engage the forward end edge of the member 13 of casing 12 and to extend over the space between the member 13 and the holder housing 21. After mounting said parts in the casing 12, a cap 39 is screwed on the threads 24, or snapped on, thereby clamping the sleeve 3S between the cap 39 and holder housing 21. Finally the front end casing 14 is snapped into place on the casing 12-13.

The holder housing 21 and contents are given an 1000 orbital reciprocatory movement by any suitable means, such as the mechanism shown which comprises a rotated shaft 40, pinion 41, gear 42 with eccentric shaft 43 which extends through the round hole in the tongue 23. The shaft 40 may 4be driven by a motor (not shown). A switch 44 controls the motor.

The brush handle 20 can be inserted between the clamping bars 2S with the bristles facing in one direction or in the opposite direction. The clamping bars automatically return to the position shown in FIG. 1 when the brush handle is withdrawn. Moisture cannot enter between the outer casing and the brush holder housing. The construction of the housing 21 and clamping assembly is such that moisture which may enter therein is harmless and readily eliminated.

Changes may be made in details of construction and in the form and arrangement of parts without departing from the scope of the invention as defined by the appended claims.

I claim:

1. An electric toothbrush provided with brush handle holding means in which the brush handle is retained by frictional engagement and is inserted and removed by simple push and pull movements without manipulation of any parts, comprising (a) a casing,

(b) a brush holder housing having an opening in its forward end mounted in the casing,

(c) a pair of separate substantially parallel brush holder bars extending longitudinally of the housing in alignment with the opening,

(d) resilient means between each bar and the holder housing yieldingly urging said bars toward each other, said resilient means comprising an elongated leaf spring extending longitudinally of the bar and means fastening the spring to the Ibar between the spring ends, the opposite ends of the spring being biased to extend in divergent directions away from the bar and to bear against the housing surface,

(e) a motor inthe casing, and

(f) means operatively connecting the brush holder housing to the motor for reciprocating the housing,

(g) said bars being separable by insertion of a toothbrush handle between said holder bars into frictional engagement therewith.

2. The toothbrush dened by claim 1, in which the yforward ends of the springs are hook form and engage the lforward ends of the holder housing.

3. The toothbrush dened by claim 1, which includes an O-ring surrounding said fbars, said fastening means being a pair of `rivets countersunk on the side of the bar facing the other bar.

4. A portable power unit provided with tool holding means comprising (a) a casing,

(b) a tool shank holder housing having an opening in its forward end mounted in the casing,

(c) a pair of separate substantially parallel tool holder bars extending longitudinally of the housing in alignment with the opening,

(d) resilient means between each bar and the holder housing yieldingly urging said bars toward each other,

(d4) said resilient means comprising an elongated leaf spring extending longitudinally of the bar and means fastening the spring to the bar between the spring ends, the opposite ends of the spring being biased to extend in divergent directions away from the bar and to bear against the housing surface, the forward ends of the springs being hook shaped yfor engagement with a fixed part of the holder housing to thereby prevent longitudinal -movement of the bars,

(e) a motor, and

(f) means connecting the rear end of the holder housing to the motor for reciprocating the housing,

(g) said bars being separable by insertion of a tool shank between said holder bars into frictional engagement therewith.

References Cited by the Examiner UNITED STATES PATENTS 1,941,999 1/1934 Redmer 279-54 3,094,338 6/1963 Page 279-23 3,142,852 8/1964 Phaneuf et a1 15-22 3,168,834 2/1965 Smithson.

CHARLES A. WILLMUTH, Prima/y Examiner.

25 E. L. ROBERTS, Assistant Examiner.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US1941999 *Jul 7, 1932Jan 2, 1934Redmer Martin HStock feeding collet
US3094338 *Dec 23, 1960Jun 18, 1963Page Richard WChuck
US3142852 *May 31, 1962Aug 4, 1964Gen ElectricAutomatic toothbrush
US3168834 *Aug 29, 1962Feb 9, 1965Smithson Charles BMotion converting mechanism
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US4458374 *Mar 25, 1982Jul 10, 1984Hiroshi HukubaElectric tooth brush holder
US4763375 *Aug 8, 1986Aug 16, 1988Vieten Michael JToothbrush
US5283921 *May 21, 1992Feb 8, 1994Ng Poon Kee GElectric toothbrush holder
US5613259 *Apr 18, 1996Mar 25, 1997Teledyne Industries, Inc.Oscillating tool
US5689850 *Dec 27, 1995Nov 25, 1997Eureka Technologies Innovation Engineering (1987) Ltd.Accessory device for toothbrushes
US6821119Jul 12, 2002Nov 23, 2004Water Pik, Inc.Dual motor oral hygiene device
US6920659Jan 12, 2002Jul 26, 2005Water Pik, Inc.Toothbrush
US6955539Jan 10, 2003Oct 18, 2005Water Pik, Inc.Characterization of motion of dual motor oral hygiene device
US7198487Dec 31, 2003Apr 3, 2007Water Pik, Inc.Whitening tip for dental flossing device
US7574765 *Jul 26, 2007Aug 18, 2009Trisa Holding AgToothbrush and process for producing the same
US7703163Jan 30, 2004Apr 27, 2010Colgate-Palmolive CompanyToothbrush with enhanced cleaning effects
US7716771 *Oct 12, 2005May 18, 2010Nam Soo KimCommon toothbrush usable electronic toothbrush
US7757326 *Oct 30, 2003Jul 20, 2010Cologate-Palmolive CompanyToothbrush with enhanced cleaning effects
US7841041May 8, 2006Nov 30, 2010Colgate-Palmolive CompanyOral care implement
US7941886 *Sep 19, 2003May 17, 2011Braun GmbhToothbrushes
US7958589Jun 12, 2009Jun 14, 2011The Gillette CompanyToothbrushes
US7975344Jul 6, 2007Jul 12, 2011The Gillette CompanyToothbrush head
US7975346Mar 31, 2010Jul 12, 2011Colgate-Palmolive CompanyOral care implement
US8016364Jun 25, 2009Sep 13, 2011Trisa Holding AgToothbrush and process for producing the same
US8151397Jun 26, 2008Apr 10, 2012Colgate-Palmolive CompanyOral care implement having flexibly supported cleaning elements extending in opposite directions
US8156600 *Sep 9, 2008Apr 17, 2012The Gillette CompanyGum massaging oral brush
US8171591 *Dec 9, 2004May 8, 2012Koninklijke Philips Electronics N.V.Power toothbrush brushhead with fluid-directing member
US8276233 *Dec 3, 2004Oct 2, 2012Gavney Jr James AMulti-directional wiping elements and device using the same
US8281448Oct 3, 2007Oct 9, 2012Colgate-Palmolive CompanyOral care implement having one or more moving sections
US8291539Aug 5, 2011Oct 23, 2012Trisa Holding AgToothbrush and process for producing the same
US8332982Aug 24, 2009Dec 18, 2012The Gillette CompanyVibrating toothbrush
US8528148Jun 7, 2011Sep 10, 2013The Gillette CompanyToothbrush head
US8578546Oct 2, 2012Nov 12, 2013Colgate-Palmolive CompanyOral care implement having one or more moving pieces
USRE44819Apr 8, 2004Apr 1, 2014Procter & Gamble Business Services Canada CompanyToothbrush
Classifications
U.S. Classification15/22.1, 279/46.7, 279/23.1
International ClassificationA61C17/16, A61C17/40
Cooperative ClassificationA61C17/40
European ClassificationA61C17/40