초록 ▼

A small floor scrubbing machine is powered by a centrally located battery pack, with a recovery tank for used scrubbing solution comprised of connected chambers located on four sides of and beneath the batteries, and a tank for clean solution in a lid over the recovery tank and batteries. A partial

A small floor scrubbing machine is powered by a centrally located battery pack, with a recovery tank for used scrubbing solution comprised of connected chambers located on four sides of and beneath the batteries, and a tank for clean solution in a lid over the recovery tank and batteries. A partial partition in the chamber behind the batteries effectively divides it into two chambers. A vacuum fan draws air and used solution into one rear chamber of the recovery tank and exhausts air to atmosphere from the other rear chamber. The extended airflow path from one rear chamber to the other around three sides of the battery pack allows mist and foam to settle out of the air stream before it reaches the vacuum fan inlet. The front and rear chambers provide plenum space to reduce the airflow velocity. Openings in the partition between the rear tanks bypass increasing amounts of air directly from one rear chamber to the other as the recovery tank fills with water, thus compensating for the diminishing airflow space above the water and controlling the velocity of the airflow. The arrangement provides improved foam control in the limited space available in a small scrubber, a constant center of gravity as the solution tank empties and the recovery tank fills during normal operation, and easy access to the recovery tank for cleaning.

대표청구항 ▼

In a walk-behind surface scrubbing machine of the type having a body including a solution tank for containing scrubbing solution, means on the body for conveying the scrubbing solution from the solution tank to a surface to be scrubbed, means on the body for working the solution on the surface, and

In a walk-behind surface scrubbing machine of the type having a body including a solution tank for containing scrubbing solution, means on the body for conveying the scrubbing solution from the solution tank to a surface to be scrubbed, means on the body for working the solution on the surface, and a vacuum fan on the body in communication with a vacuum squeegee on the body for recovering soiled solution from the scrubbed surface the improvement comprising a mist and foam controlling solution recovery tank formed in the body, the recovery tank comprising a plurality of chambers including a first expansion chamber at a rear of the body, a second expansion chamber located at a front of the body, and at least one connecting chamber providing fluid communication between the expansion chambers, a lid pivotally attached to the solution recovery tank, the vacuum fan being mounted in the lid and being located so as to circulate fluid from the first expansion chamber through the at least one connecting chamber to the second expansion chamber.