×

Electric toothbrush

  • US 6,230,354 B1
  • Filed: 11/30/1998
  • Issued: 05/15/2001
  • Est. Priority Date: 10/03/1997
  • Status: Expired due to Fees
First Claim
Patent Images

1. In an electric toothbrush comprising a body (1) providing a handle and containing in the handle drive means (2), an arm (3) whose first end (4) is connected to said body (1) and a head (5) which extends in prolongation of said arm (3) from the side of the second end (6) of the arm (3) and which is provided with a brush (7) adapted to be driven in rotation about an orthogonal axis X—

  • X′

    by movement transmission means (8) coupled to a motor shaft (9) driven by drive means (2), said brush (7) comprising a circular plate (10) whose external surface (11) is provided with holes (12) in which are inserted clumps of bristles (13, 17 and 20) parallel to each other and mounted perpendicularly relative to said external surface;

    the improvement wherein;

    the circular plate (10) comprises a central region (14) comprising a first predetermined number of clumps of bristles (13) whose free ends (15) are located in a same plane P1, an intermediate region (19) about said central region and comprising a second predetermined number of clumps of bristles (20) whose free ends (21) are located in said plane P2, and a peripheral region (16) about said intermediate region and comprising a third predetermined number of clumps of bristles (17) whose free ends (18) are located in the plane P1, in a plane P2 wherein said orthogonal axis being orthogonal to said circular plate and said bristles whose free ends are located in plane P1 have a first length greater than those bristles whose free ends are located in plane P2 and have a second length; and

    wherein said peripheral region (16) comprises at least one row of clumps of bristles (17) forming an external crown and whose free ends (18) define a virtual line having a sinusoidal shape with the upper and lower bounds of the sinusoidal shape are P1 and P2 respectively.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×