Electric toothbrushes
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United States of America Patent
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-
Mar 31, 1998
Grant Date -
N/A
app pub date -
Nov 20, 1996
filing date -
Nov 20, 1996
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
An electric toothbrush has an elongate shank and a drive shaft formed in two sections. The sections are drivingly coupled together by a coil spring. The shank is formed in two sections joined together by a flexible ribbed seal. The shank is able to flex while the drive shaft continues to run normally without adding strain to the electric motor which would increase electric power required. Rigid bars restrict the flexibility of the shank parts into a single plane.
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Family
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