Power driven toothbrush
First Claim
1. A power-driven toothbrush comprising a housing, first and second adjacently spaced brush elements rotatably mounted on and exposed with respect to said housing, drive means in said housing for driving said brush elements in rotary oscillation, said drive means comprising a drive shaft extending toward said brush elements, operatively drivingly connected to a first one of said brush elements, and effective to drive said first brush element into rotary oscillation, and crank linkage means between said brush elements to drive the other of said brush elements into rotary oscillation when said first brush element is driven in rotary oscillation.
1 Assignment
0 Petitions
Accused Products
Abstract
A hand-held power driven toothbrush carries a pair of exposed brush elements and self-contained driving means effective to directly drive one of said brush elements in oscillation, with linkage between the brush elements such that the second brush element is also oscillated, the two brush elements preferably being oscillated in opposite directions.
203 Citations
16 Claims
- 1. A power-driven toothbrush comprising a housing, first and second adjacently spaced brush elements rotatably mounted on and exposed with respect to said housing, drive means in said housing for driving said brush elements in rotary oscillation, said drive means comprising a drive shaft extending toward said brush elements, operatively drivingly connected to a first one of said brush elements, and effective to drive said first brush element into rotary oscillation, and crank linkage means between said brush elements to drive the other of said brush elements into rotary oscillation when said first brush element is driven in rotary oscillation.
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3. A power-driven toothbrush comprising a housing, first and second adjacently spaced brush elements rotatably mounted on and exposed with respect to said housing, drive means in said housing for driving said brush elements in rotary oscillation, said drive means comprising a drive shaft extending toward said brush elements, operatively drivingly connected to a first one of said brush elements, and effective to drive said first brush element into rotary oscillation, and crank linkage means between said brush elements to drive the other of said brush elements into rotary oscillation opposite in direction to that of said first brush element when said first brush element is driven in rotary oscillation.
- 8. A power-driven toothbrush attachment designed to be affixed to a base having drive means therefor, said attachment comprising an elongated housing with first and second adjacently spaced brush elements rotatably mounted thereon in exposed positions near one end thereof, the other end of said housing being adapted to be affixed to said base and having means operatively drivingly connectable to said drive means when said housing is thus affixed, said means comprising a drive shaft rotatably mounted in said housing extending from said end toward said brush elements, said drive shaft being operatively connected to a first of said brush elements and effective with said drive means to drive said first brush element into rotary oscillation, and a crank linkage between said first brush element and the other of said brush elements, thereby to drive the other of said brush elements into rotary oscillation when said first brush element is driven in rotary oscillation.
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9. A power-driven toothbrush attachment designed to be affixed to a base having drive means therefor, said attachment comprising an elongated housing with first and second adjacently spaced brush elements rotatably mounted thereon in exposed positions near one end thereof, the other end of said housing being adapted to be affixed to said base and having means operatively drivingly connectable to said drive means when said housing is thus affixed, said means comprising a drive shaft rotatably mounted in said housing extending from said end toward said brush elements, said drive shaft being operatively connected to a first of said brush elements and effective with said drive means to drive said first brush element into rotary oscillation, and a crank linkage between said first brush element and the other of said brush elements, thereby to drive the other of said brush elements into rotary oscillation opposite in direction to that of said first brush element when said first brush element is driven in rotary oscillation.
- 13. In a power-driven tooth care device comprising a housing, a tooth care element rotatably mounted on and exposed with respect to said housing, and drive means in said housing for driving said tooth care element in rotary oscillation the improvement which comprises said drive means comprising a motor, a member rotatably mounted in said housing, means operatively connected between said motor and said member for driving the latter in rotation, said member having an off-center part, a first arm rotatably mounted on said part, an output shaft within said housing operatively connected to said tooth care element, a second arm in said housing drivingly connected to said shaft and extending radially therefrom, and an operative connection between said first and second arms for driving said second arm and said output shaft in rotary oscillation when said member is rotated by said motor.
Specification