Brushing – scrubbing – and general cleaning – Machines – Brushing
Patent
1999-04-23
2000-10-31
Chin, Randall E.
Brushing, scrubbing, and general cleaning
Machines
Brushing
15 221, A46B 1302
Patent
active
061383104
ABSTRACT:
An electric toothbrush is provided with an electric motor and a driving mechanism. The driving mechanism includes a drive shaft having a longitudinal axis, and is adapted for frictional coupling to a drive pin mounted on a brush head portion of the electric toothbrush so as to impart a linear reciprocating motion in a direction along its longitudinal axis. 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.
REFERENCES:
patent: D259977 (1981-07-01), Porper
patent: 5027463 (1991-07-01), Daub
patent: 5259083 (1993-11-01), Stansbury, Jr.
patent: 5327607 (1994-07-01), Wagner
patent: 5353460 (1994-10-01), Bauman
patent: 5359747 (1994-11-01), Amakasu
Dickie Robert G.
Porper Robert P.
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