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US 4,520,526 AGranted
Resiliently flexible toothbrush
OwnerCharles W. Petersinventor
Life of this patent
Estimating the term…
Abstract
A brush having a shaped body member with a handle portion, a head portion and a flexible portion. The flexible portion allows the head portion to move relative to the handle portion in the vertical plane, but is substantially rigid in the horizontal plane.
Claims3
A tooth brush comprising:
- a shaped body member having a handle portion, a head portion and a resiliently flexible portion therebetween, the head portion having attached bristles, the resiliently flexible portion being flexible in a vertical plane allowing the head portion movement relative to the handle portion, but substantially rigid in a horizontal plane, the bristles extending upwardly in the vertical direction, wherein said body member has a shaped hollow at the resiliently flexible portion, creating a thin top resiliently flexible horizontal member and a thin bottom resiliently flexible horizontal member, said shaped hollow extending completely through said resiliently flexible portion from one side to the other side thereof in the horizontal direction, and wherein the middle of the head portion can be deflected in the 1/4" to 3/4" range with a force just sufficient to bring the bristle ends in good contact to the irregular surfaces of the teeth and gums.
Dependencies are inferred from the claim text.