Automatic power-driven toothbrushes
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United States of America Patent
Stats
-
Jan 25, 2005
Grant Date -
Aug 29, 2002
app pub date -
Feb 6, 2002
filing date -
Feb 6, 2001
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The present invention discloses the present invention discloses a power toothbrush that includes a body portion 105. An elongated level arm 102 extends from one end of the body portion to a toothbrush head 101 disposed at a distal end of the toothbrush. The toothbrush head includes a plurality of brush bristles. The elongated lever arm 102 is mounted on a vibrating pivot 104 driven by rotational DC motor engaging and pushing a set of permanent magnets attached to a two-arm fork rotating along the lever arm 102. In a preferred embodiment, the DC motor drives a three-leg permanent magnets each disposed at a 120-degree phase from each other for driving the two-arm fork for generating a vibration that three-times the frequency of the DC motor's rotational frequency.
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