Importance

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Abstract

The brush 2' in FIGS. 8-11 is rod-like and a monolith of semi-rigid but resiliently flexible plastic material. It comprises elongated spaced parallel handle forming members 34 which are discrete from one another, but hingedly interconnected so as to be rotatable about axes 18' lying in a plane substantially coincident with the hinged connection 48 therebetween. Arms 40 project from the members, with the slot 50 therebetween, and wings 30' at the head 74 thereof. Bias inherent in the plastic, crosswise of the members 34 at the hinged connection, tends to flatten the device, as in FIGS. 9 and 10. But the bias is resiliently yieldable to the user's thumb and fingers so that the head 74 (or 30', 46, 48, 46, 30') can be pinched into the condition of FIG. 11 wherein the user must relatively forcibly wedge the tops of the teeth between the tooth cleaning sides 6' of the wings when the head is straddled about a row of teeth. Meanwhile, the midsection 48 of the head and the plastic portions 46 between it and the arms 40, form an articulated joint between the arms which is operable to preserve the straddling effect, yet allow the head to adjust to the varying diameters of the teeth when the head is translated along the row in engagement with the inside and outside faces of the teeth.

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First Claim