US1932878A - Toothbrush - Google Patents

Toothbrush Download PDF

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Publication number
US1932878A
US1932878A US630734A US63073432A US1932878A US 1932878 A US1932878 A US 1932878A US 630734 A US630734 A US 630734A US 63073432 A US63073432 A US 63073432A US 1932878 A US1932878 A US 1932878A
Authority
US
United States
Prior art keywords
bristle
shank
knob
back member
spring
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US630734A
Inventor
Akizawa Kuniyoshi
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Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Application granted granted Critical
Publication of US1932878A publication Critical patent/US1932878A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • AHUMAN NECESSITIES
    • A46BRUSHWARE
    • A46BBRUSHES
    • A46B7/00Bristle carriers arranged in the brush body
    • A46B7/04Bristle carriers arranged in the brush body interchangeably removable bristle carriers
    • AHUMAN NECESSITIES
    • A46BRUSHWARE
    • A46BBRUSHES
    • A46B7/00Bristle carriers arranged in the brush body
    • A46B7/06Bristle carriers arranged in the brush body movably during use, i.e. the normal brushing action causing movement
    • A46B7/08Bristle carriers arranged in the brush body movably during use, i.e. the normal brushing action causing movement as a rotating disc
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T403/00Joints and connections
    • Y10T403/60Biased catch or latch

Definitions

  • This invention relates to improvements in a tooth brush which comprises a shank and a detachable bristle back member. It has for its object to provide a rigid and reliable holding means for the bristle back member, which is rotatably held on a knob on the shank so that it rotates while it is in use, and the bristles are evenly wom all over the surtace.
  • Fig. 1 is a side elevation of the brush accordr ing to this invention.
  • Fig. 3 is a part sectional elevation of the shank.
  • Fig. 4 is a sectional elevation of the bristle back member, and
  • Fig. 5 is a plan view thereof.
  • the tooth brush of this invention consists of a shank and a bristle back member which is detachably held by the shank, the holding means being the characteristic feature of this invention.
  • an end of the shank 1 is somewhat flattened and widened so as to make a spoon-like shape.
  • a knob 2 which may be made integral with the shank, or separately therei'rom and flrmly fixed thereto with a ce- 5 menting material.
  • the knob 2 is made of a metal having a grooved flange za, the latter part being moulded in the body of the shank.
  • the bristle baekmember has a base plate 3 with bristle 4 set therein.
  • a spring member which comprises a spring 5 and a case 6 therefor.
  • the case has a central projection sa, and each end of the spring 5 fits into the slits 6b 5 on the opposite side of the central projection.
  • the size of the central projection is such that the knob of the bristle back member can be loosely inscrted into the cavity of the projection.
  • Fig. 2 is a plan view When the knob fits into the cavity, the spring's ends flrmly hold the neck of the knob so that the bristle back member is connected to the shank although the former can freely rotate on the latter.
  • the shank and the base plate of the bristle back member can be made of any convenient material, but a plastic material such as celluloid and resinous compounds is preferable, because the knob and the spring member can be moulded in the bodies of the shank and the base plate without requiring any cementing material.
  • the tips of the bristles are cut so as to make a concentric wave form as shown in Fig. 2, thereiore the sectinal view of the bristle on any radial plane is the same as shown in Fig. 4.
  • the bristle member rotates on the knob 2 by the triction on the teeth, so that each part of the bristle wears in the same manner and at the same speed, therefore a bristle member lasts longer.
  • the bristle is wo-n off, it may be replaced by a new one, and the shank can be used for a long time.
  • a tooth brush which comprises a shank and a bristle back member detachably held by the former, the holding means consisting of a knob provided at an end of the shank and a spring member provided at the centre of the base plate of the bristle back member which base plate is made in a circular disc form. the knob being rotatably held by the spring member. and the tips of the bristles of the bristle back member being cut in concentric wave form.

Description

Oct. si, 1933. AKIZAWA 1,932,878
TOOTHBRUSH Filed Aug. 27, 1952 I'nre 77 fan- Patented Oct. 31, 1933 UNITED STATES PATENT OFFICE Application August 27, 1932, Serial No. 630,734, and in Japan September 5, 1931 1 Claim.
This invention relates to improvements in a tooth brush which comprises a shank and a detachable bristle back member. It has for its object to provide a rigid and reliable holding means for the bristle back member, which is rotatably held on a knob on the shank so that it rotates while it is in use, and the bristles are evenly wom all over the surtace.
Fig. 1 is a side elevation of the brush accordr ing to this invention, and
thereof.
Fig. 3 is a part sectional elevation of the shank. Fig. 4 is a sectional elevation of the bristle back member, and Fig. 5 is a plan view thereof.
The tooth brush of this invention consists of a shank and a bristle back member which is detachably held by the shank, the holding means being the characteristic feature of this invention.
Rererring to the drawing, an end of the shank 1 is somewhat flattened and widened so as to make a spoon-like shape. At the centre of the flattened end is fixed a knob 2 which may be made integral with the shank, or separately therei'rom and flrmly fixed thereto with a ce- 5 menting material. According to the example shown in Fig. 3, the knob 2 is made of a metal having a grooved flange za, the latter part being moulded in the body of the shank.
The bristle baekmember has a base plate 3 with bristle 4 set therein. On the back side of the plate is moulded therein in a spring member, which comprises a spring 5 and a case 6 therefor. The case has a central projection sa, and each end of the spring 5 fits into the slits 6b 5 on the opposite side of the central projection. The size of the central projection is such that the knob of the bristle back member can be loosely inscrted into the cavity of the projection.
Fig. 2 is a plan view When the knob fits into the cavity, the spring's ends flrmly hold the neck of the knob so that the bristle back member is connected to the shank although the former can freely rotate on the latter.
The shank and the base plate of the bristle back member can be made of any convenient material, but a plastic material such as celluloid and resinous compounds is preferable, because the knob and the spring member can be moulded in the bodies of the shank and the base plate without requiring any cementing material.
The tips of the bristles are cut so as to make a concentric wave form as shown in Fig. 2, thereiore the sectinal view of the bristle on any radial plane is the same as shown in Fig. 4.
When this tooth brush is in use, the bristle member rotates on the knob 2 by the triction on the teeth, so that each part of the bristle wears in the same manner and at the same speed, therefore a bristle member lasts longer. In case the bristle is wo-n off, it may be replaced by a new one, and the shank can be used for a long time.
What I claim is:-
A tooth brush which comprises a shank and a bristle back member detachably held by the former, the holding means consisting of a knob provided at an end of the shank and a spring member provided at the centre of the base plate of the bristle back member which base plate is made in a circular disc form. the knob being rotatably held by the spring member. and the tips of the bristles of the bristle back member being cut in concentric wave form.
KUNIYOBHI AKIZAWA.
US630734A 1931-09-05 1932-08-27 Toothbrush Expired - Lifetime US1932878A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1932878X 1931-09-05

Publications (1)

Publication Number Publication Date
US1932878A true US1932878A (en) 1933-10-31

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Family Applications (1)

Application Number Title Priority Date Filing Date
US630734A Expired - Lifetime US1932878A (en) 1931-09-05 1932-08-27 Toothbrush

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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2675573A (en) * 1949-10-07 1954-04-20 Harry A Goldberg Toothbrush with removable head
US2959800A (en) * 1958-07-02 1960-11-15 Edward S Bischoff Snap-on brush
US2988764A (en) * 1959-05-11 1961-06-20 Light Steel Sectional Const Lt Hand utensils such as brushes or the like
US3008165A (en) * 1959-05-01 1961-11-14 Leidy G Scholl Removable brush shank
US3964120A (en) * 1974-10-04 1976-06-22 Lawrence Peska Associates, Inc. Comb cleaner
EP0045356A1 (en) * 1980-07-31 1982-02-10 KARL PFISTERER ELEKTROTECHNISCHE SPEZIALARTIKEL GMBH & CO. KG Head for an operating rod
US4805870A (en) * 1983-02-03 1989-02-21 Emerson Electric Co. Coil retainer for solenoid
US5142724A (en) * 1989-02-18 1992-09-01 Park Sa R Rotary toothbrush
WO1992019125A1 (en) * 1991-05-08 1992-11-12 Pierre De Geyter Toothbrush and bristle holder therefor
WO2005063079A1 (en) * 2003-12-20 2005-07-14 Braun Gmbh Manual toothbrush
US8448287B2 (en) 2010-10-22 2013-05-28 Mcneil-Ppc, Inc. Replaceable toothbrush head

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2675573A (en) * 1949-10-07 1954-04-20 Harry A Goldberg Toothbrush with removable head
US2959800A (en) * 1958-07-02 1960-11-15 Edward S Bischoff Snap-on brush
US3008165A (en) * 1959-05-01 1961-11-14 Leidy G Scholl Removable brush shank
US2988764A (en) * 1959-05-11 1961-06-20 Light Steel Sectional Const Lt Hand utensils such as brushes or the like
US3964120A (en) * 1974-10-04 1976-06-22 Lawrence Peska Associates, Inc. Comb cleaner
EP0045356A1 (en) * 1980-07-31 1982-02-10 KARL PFISTERER ELEKTROTECHNISCHE SPEZIALARTIKEL GMBH & CO. KG Head for an operating rod
US4805870A (en) * 1983-02-03 1989-02-21 Emerson Electric Co. Coil retainer for solenoid
US5142724A (en) * 1989-02-18 1992-09-01 Park Sa R Rotary toothbrush
WO1992019125A1 (en) * 1991-05-08 1992-11-12 Pierre De Geyter Toothbrush and bristle holder therefor
BE1004797A3 (en) * 1991-05-08 1993-02-02 Geyter Pierre De Brush and especially toothbrush, and support for brush handle such.
WO2005063079A1 (en) * 2003-12-20 2005-07-14 Braun Gmbh Manual toothbrush
US20070169295A1 (en) * 2003-12-20 2007-07-26 Braun Gmbh Manual toothbrush
US7805796B2 (en) 2003-12-20 2010-10-05 Braun Gmbh Manual toothbrush
US20100257684A1 (en) * 2003-12-20 2010-10-14 Florina Winter Manual toothbrush
US8245348B2 (en) 2003-12-20 2012-08-21 Braun Gmbh Manual toothbrush
US8448287B2 (en) 2010-10-22 2013-05-28 Mcneil-Ppc, Inc. Replaceable toothbrush head

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