Brushing – scrubbing – and general cleaning – Machines – Brushing
Reexamination Certificate
2001-06-28
2004-04-20
Warden, Sr., Robert J. (Department: 1744)
Brushing, scrubbing, and general cleaning
Machines
Brushing
C015S022100, C433S118000, C433S122000, C433S131000, C074S025000
Reexamination Certificate
active
06721986
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to an electric toothbrush.
BACKGROUND OF THE INVENTION
Electric toothbrushes utilize an electric motor to drive a brush head to provide a brushing action for cleaning teeth. One such toothbrush is disclosed by Sham in U.S. Pat. No. 5,822,821. Sham discloses an electric toothbrush having a motor, which drives a driven gear. The driven gear drives a crank member. The crank member, in turn drives a reciprocating rocker arm. The rocker arm, in turn, drives a brush head. The rate of rotation of the driven gear in the device determines the frequency of reciprocation of the brush head, while the length and shape of the crank member determine the angular sweep and the average angular speed of the brush head.
SUMMARY OF THE INVENTION
The present invention is directed to an electric toothbrush, comprising a housing, an electric motor, a first transmission and a second transmission. The electric motor is linked to the housing, and drives a motor output member for rotation about a motor output axis. The first transmission is linked to the motor output member and converts rotational movement from the motor output member into rotational reciprocating movement at a first average angular speed and along a first angular sweep. The second transmission is linked to the first transmission and converts rotational reciprocating movement from the first transmission into rotational reciprocating movement at a second average angular speed about a second transmission output axis that is parallel to the first axis, and along a second angular sweep. The second transmission drives an output member to reciprocate at the second average angular speed about the second transmission output axis, and along the second angular sweep. The second transmission can include first and second gear members. The first gear member can include a section of an internal gear connected to the first transmission. The second gear member is drivenly connected to the first gear member and comprises a spur gear. The output member can include a removably attachable brush head.
REFERENCES:
patent: 3577579 (1971-05-01), Duve
patent: 5353460 (1994-10-01), Bauman
patent: 5493747 (1996-02-01), Inakagata et al.
patent: 5504958 (1996-04-01), Herzog
patent: 5504959 (1996-04-01), Yukawa et al.
patent: 5504960 (1996-04-01), Hommann
patent: 5504961 (1996-04-01), Yang
patent: 5524312 (1996-06-01), Tan et al.
patent: 5561881 (1996-10-01), Klinger et al.
patent: D375204 (1996-11-01), Okada
patent: 5577285 (1996-11-01), Drossler
patent: 5590434 (1997-01-01), Imai
patent: 5617603 (1997-04-01), Mei
patent: 5651157 (1997-07-01), Hahn
patent: 5652990 (1997-08-01), Driesen et al.
patent: 5697117 (1997-12-01), Craft
patent: D388958 (1998-01-01), Hartwein
patent: 5732432 (1998-03-01), Hui
patent: 5732433 (1998-03-01), Göcking et al.
patent: D394751 (1998-06-01), Eguchi et al.
patent: 5784742 (1998-07-01), Giuliani et al.
patent: 5784743 (1998-07-01), Shek
patent: 5794296 (1998-08-01), Wong
patent: 5822821 (1998-10-01), Sham
patent: RE35941 (1998-11-01), Stansbury, Jr.
patent: 5842244 (1998-12-01), Hilfinger et al.
patent: 5842245 (1998-12-01), Pai
patent: 5850655 (1998-12-01), Göcking et al.
patent: 5862558 (1999-01-01), Hilfinger et al.
patent: 5862559 (1999-01-01), Hunter
patent: 5867856 (1999-02-01), Herzog
patent: 5934908 (1999-08-01), Woog et al.
patent: 5943723 (1999-08-01), Hilfinger et al.
patent: 5974613 (1999-11-01), Herzog
patent: 5974615 (1999-11-01), Schwarz-Hartmann et al.
patent: 5987681 (1999-11-01), Hahn et al.
patent: 6000083 (1999-12-01), Blaustein et al.
patent: 6021538 (2000-02-01), Kressner et al.
patent: 6092252 (2000-07-01), Fischer et al.
patent: 6138310 (2000-10-01), Porper et al.
patent: 6178579 (2001-01-01), Blaustein et al.
patent: 6230354 (2001-05-01), Sproat
patent: 3544256 (1987-06-01), None
English translation of Abstract of DE 3544256 A1 to Ullrich, Volker.
Bereskin & Parr
Cole Laura C
Warden, Sr. Robert J.
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