Method and apparatus for brushing teeth with cyclically rotating

Details Method and apparatus for brushing teeth with cyclically rotating Method and apparatus for brushing teeth with cyclically rotating

1991-05-01

1992-06-09

Roberts, Edward L.

Dentistry

Method or material for testing, treating, restoring, or...

Cleaning

15 221, 151671, A46B 1308, A61C 1732

Patent

active

051202255

ABSTRACT:
A toothbrush includes a cluster of rotatable bristle tufts disposed between two longitudinally spaced clusters of positionally fixed bristle tufts. The fixed bristles frictionally engage tooth surfaces to oppose longitudinal movement of the brush head in response to longitudinal reciprocation of the brush handle within the head. A rack and pinion convert the longitudinal reciprocation of the handle to oscillatory rotation of the rotatable bristle tufts.

REFERENCES:
patent: 4010506 (1977-03-01), Young et al.
patent: 4545087 (1985-10-01), Nahum
patent: 5068939 (1991-12-01), Holland

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