Tooth brush
OwnerPer Axel Torbjorn Axelssoninventor
Life of this patent
Estimating the term…
Abstract
A tooth brush is disclosed in which parallell bristles extend in opposite directions from a central plate-like stem connected to a shaft or a handle. The tooth brush is used for cleaning teeth interspaces and comprises a base plate which abuts the gum and protects the same when the bristles work upon opposite teeth faces. The bristles are longer next to the base plate and gradually shorter as the distance therefrom increases. Also in the length direction of the stem the length of the bristles varies, and the minimum bristle lengths are found either at the tip or at the middle of the length of the active part of the brush.
Claims8
A tooth brush for cleaning of teeth interspaces, comprising a straight stem of an approximately T-shaped cross-section forming a base plate adapted for insertion into a tooth interspace so as to rest upon and protect the gum, and also forming an attachment plate protruding at right angles to the longitudinal center line of the former, substantially parallel brush bristles extending outwardly therefrom in opposite directions and capable of working simultaneously upon opposed faces of two adjacent teeth, the lengths of the bristles decreasing as the distance from the base plate increases.
A tooth brush comprising a straight stem having two opposed substantially planar faces, a set of parallel bristles extending from one of said faces, a second set of parallel bristles extending from the other side of said stem in a direction opposite to that of said first set of bristles, the lengths of the bristles varying in the length direction as well as in the transverse direction of said stem and the length of each bristle being the same as the length of a bristle located on the opposite side of the stem and substantially collinear thereto, the ends of the bristles in each cross-section of the stem coinciding with opposite inclined sides of an equilateral trapezium.
Dependencies are inferred from the claim text.