Patent ID: 7266861
Filing Date: 2007-09-11
Classification: A47L

Abstract:
1. A floor cleaning tool comprising: a housing of which a bottom side is adapted to face a floor; a support element that is mounted to said housing and protrudes downwardly from said housing so as to contact on the floor and exert a first portion of a total contact force of said floor cleaning tool on the floor; a power-driven rotatable brush roller that is rotatably mounted in said housing and exposed downwardly from said housing toward the floor; a pivot lever that has a pivot point pivotally connected to said housing; an adjusting element that is supported by and connected to a mounting point on said pivot lever displaced away from said pivot point of said pivot lever; and a biasing spring that is connected to said housing and to a spring connection point on said pivot lever displaced away from said pivot point of said pivot lever; wherein said biasing spring exerts a biasing force that biases said pivot lever to pivot about said pivot point so as to move said adjusting element out of said housing to contact on the floor and exert a second portion of the total contact force of said floor cleaning tool on the floor; and wherein said brush roller selectively contacts on the floor and exerts a third portion of the total contact force of said floor cleaning tool on the floor, wherein said third portion is dependent on said second portion so as to be reduced by an increase of said second portion and to be increased by a reduction of said second portion, whereby an adjustment of said adjusting element adjusts said third portion of said total contact force exerted by said brush roller on the floor.