Patents Examined by Andrea Aldag
  • Patent number: 6105191
    Abstract: A toothbrush with scraping bristles has a plural number of bristle clusters crisscrossly mounted on a block head. The tip of the bristle clusters has a contour mating with dental area. In the block head, there are provided with a scraping bristle stem which has a plural number of movable scraping bristles normally extendable out of the block head for moving to and fro in the gingiva sulcus to scrape off tartars formed on teeth surface. A plural number of spaced and triangle scraping flakes may be disposed on each scraping bristle to enhance the effect of scraping tartars and dental plaque formed in the inter-gingiva-sulcus. The toothbrush may be used manually or be driven electrically.
    Type: Grant
    Filed: October 19, 1998
    Date of Patent: August 22, 2000
    Inventors: Kuo-Shen Chen, Tsehua Chen