CA2324816A1 - Improved mechanical toothbrush having opposed dual heads and having oscillatory movement - Google Patents

Improved mechanical toothbrush having opposed dual heads and having oscillatory movement Download PDF

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Publication number
CA2324816A1
CA2324816A1 CA 2324816 CA2324816A CA2324816A1 CA 2324816 A1 CA2324816 A1 CA 2324816A1 CA 2324816 CA2324816 CA 2324816 CA 2324816 A CA2324816 A CA 2324816A CA 2324816 A1 CA2324816 A1 CA 2324816A1
Authority
CA
Canada
Prior art keywords
head portion
bristle
longitudinal axis
brush head
bundles
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.)
Granted
Application number
CA 2324816
Other languages
French (fr)
Other versions
CA2324816C (en
Inventor
Robert P. Porper
Robert G. Dickie
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
TWINBRUSH LLC
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
Priority claimed from US09/510,501 external-priority patent/US6401288B1/en
Application filed by Individual filed Critical Individual
Publication of CA2324816A1 publication Critical patent/CA2324816A1/en
Application granted granted Critical
Publication of CA2324816C publication Critical patent/CA2324816C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

An electric toothbrush is provided with an electric motor and a driving mechanism. The driving mechanism includes a motion translation means to convert rotary motion to oscillatory movement of a drive shaft adapted to be received on the brush head portion of the electric toothbrush, so as to impart an oscillatory movement of the head portion about its longitudinal axis. A particular driving mechanism includes a flywheel having a drive pin which is received in a cam block secured to the drive shaft. The brush head portion comprises a pair of opposed bristle head portions arranged so as to present two groups of opposed bundles of bristles disposed substantially perpendicularly each to the other. Each of the groups of bundles of bristles comprises a plurality of rows and a plurality of columns of bristle bundles, where the rows aligned parallel to the longitudinal axis of the brush head portion, and the columns are aligned perpendicular to the longitudinal axis of the brush head portion. The bristles in each bundle in each row of bristle bundles are substantially equal in length, and the lengths of the bristles in each row of bristle bundles on each bristle head portion are progressively longer in each successive row of bristle bundles which is further away from the longitudinal axis of the brush head portion than an adjacent row of bristle bundles which is closer to the longitudinal axis of the brush head portion. The outer ends of the respective row of bristle bundles on each bristle head portion which is closest to the longitudinal axis of the brush head portion are spaced less than 0.100 inch from the outer ends of the respective opposed row of bristle bundles on the other bristle head portion.
CA 2324816 2000-02-22 2000-10-31 Improved mechanical toothbrush having opposed dual heads and having oscillatory movement Expired - Fee Related CA2324816C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US09/510,501 2000-02-22
US09/510,501 US6401288B1 (en) 1999-04-23 2000-02-22 Mechanical toothbrush with opposed dual heads and having oscillatory movement

Publications (2)

Publication Number Publication Date
CA2324816A1 true CA2324816A1 (en) 2001-08-22
CA2324816C CA2324816C (en) 2006-06-27

Family

ID=24031004

Family Applications (1)

Application Number Title Priority Date Filing Date
CA 2324816 Expired - Fee Related CA2324816C (en) 2000-02-22 2000-10-31 Improved mechanical toothbrush having opposed dual heads and having oscillatory movement

Country Status (1)

Country Link
CA (1) CA2324816C (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112674900A (en) * 2019-10-17 2021-04-20 郑云兵 Oscillating electric toothbrush
CN112773543A (en) * 2021-03-02 2021-05-11 雷德贵 Electric toothbrush head and electric toothbrush

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112674900A (en) * 2019-10-17 2021-04-20 郑云兵 Oscillating electric toothbrush
CN112773543A (en) * 2021-03-02 2021-05-11 雷德贵 Electric toothbrush head and electric toothbrush

Also Published As

Publication number Publication date
CA2324816C (en) 2006-06-27

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