150 179
60 180
150 179
The present invention relates to an improved toothbrush which is effective in cleaning the backteeth and for brushing the teeth with the least amount of scratching on the periodontal tissue surface of theoral cavity.
Another object of the present invention is to provide a toothbrush having a flexible extensioncontaining a plurality of bristles and a flexible element which covers the back of the head for minimizingscratches on the periodontal tissue surface of the oral cavity. 27 31
As shown in FIGS.2 and 4, the flexible extension member 12 includes a cover 17 which isattached to the outer planar surface of the brush head 11 by an adhesive 18. The member 12 also has aninner stepped surface. Bristles 13' are attached to the surface 16 which extends in a longitudinal directionaway from the handle beyond the outer planar surface of the brush head of the flexible extension portionand bristles 13 are attached to the brush head surface 15. The bristles 13' contain a plurality of shorterbristles near the transition point between the flexible and fixed portions of the toothbrush head so that theflexible extended portion of the toothbrush head can flex while avoiding conflict with the bristles 13 of themain head portion of the brush.
The flexible extension member 12 is made of rubber, so that the surface thereof can minimize scracthingwhile massaging the periodontal tissue surface. Accordingly, the flexible extension member 12 can be usedto effectively clean the back teeth. 24
12 18 11
17 12 13'
13 15 13'
12 135
11 11 12 60
14 11 12 11 14
11 11 14
11 12
11 11 12 60
11 12
12 12 11
135 12 11
9-19323
3a
3d 4a 4c 0017
12 11
150 179
150 179
135 150 179
15 17 126
159 53
1 12
12 11 135
12 11
11 12
150 179
12 11
5 63-150647 2-71329 13
15 13
16 15
1 12
18 11 17
12 18 11
12 11
2 12 17
17 11
12 21
3 150-179
179 180
150 -179
1 The invention being thus described, it will be obvious
that the same may be varied in many ways. Such variations are not to be regarded as adeparture from the spirit and scope of the invention, and all such modifications as wouldbe obvious to one skilled in the art are intended to be included in the scope of thefollowing claims. 24 29
8-502909
4-84157 6-36421
63-150647 2-71329
1-190307
150-179 179
Briefly described, the present invention relates to a toothbrush having
a flexible extension containing a plurality of bristles and a flexible element which coversthe back of the head for minimizing scratches on the periodontal tissue surface of the oralcavity. 40 44
As
shown in FIGS.2 and 4, the flexible extension member 12 includes a cover 17 which isattached to the outer planar surface of the brush head 11 by an adhesive 18. The member
12 also has an inner stepped surface. 6 9
12 18 11
17 12
12 17
23 22
The flexible extension member 12 is made of rubber, so
that the surface thereof can minimize scracthing while massaging the periodontal tissuesurface. 20 22 12
21 23
150-179
180 179
1 5373602
12 18
11 17 12
13'
16 13
15 13'
13 6 19
26 7
12 17 18
12 11
11 12
12 11
11 12
13' 12
13' 12 13'
13 12
11 12
12 11 135
11 12
8 502909
17 19
26 1
115 170
155 170 21 25
4 84157 6 36421 6 5 17
2 4 5
135 170
14 17
63 150647 2 71329
1 190307
19 20 18
11 10
11 12 11
12 10
14 13 17 27
18 5
14 15
2 12
12 11
150 179
150 179
180 179
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