Deformable toothbrush
OwnerRobert M. McCuskerinventor
Life of this patent
Estimating the term…
Abstract
A toothbrush having a head portion (1) which has bristles (2) attached, a handle portion (3) and an intermediate portion (4) of reduced cross-section with regard to the head and handle portions (1), (3). The intermediate portion (4) of the toothbrush is non-resiliently deformable to change the angular relationship between the head portion (1) and the handle portion (2). If this angular relationship is changed after brushing, the user is applying excessive pressure during brushing. The shape of the toothbrush may be changed by the user to suit the user's particular mouth shape.
Claims3
A toothbrush of integral construction, formed of a synthetic plastics material having a head portion and an elongate handle portion, the head portion having a longitudinal axis and bristles extending substantially perpendicularly to said axis, the head portion and handle portion being joined by an unreinforced intermediate portion which is of smaller cross-sectional area than the adjacent parts of the head portion and of the handle portion, the intermediate portion being non-resiliently deformable without heating to change the angular relationship between the head portion and the handle portion by the application in a user's mouth of brushing pressure producing a bending moment having a magnitude of between 0.04 and 1.1 Newton meters whereby said angular relationship will be changed when a user applies a brushing pressure to the teeth or gums along axes of said bristles which is over and above that required to clean the teeth and gums efficiently and which produces a bending moment of said magnitude and will remain changed on removal of the toothbrush from the user's mouth.
Dependencies are inferred from the claim text.