Abstract: A floor working machine for the treatment of the surface of floors and more especially a floor sanding machine comprises a work plate which rotates during operation. The work plate is connected in a manner transmitting rotation with a holding part arranged above it coaxially, such holding part bearing against the work plate with at least a part of the weight of the machine and being driven by the machine's motor. The holding part is supported adjacent to the center of rotation on the work plate. In this respect work plate is able to be pivoted with a freedom of movement similar to that provided by a ball joint to allow for possible unevenness of the floor. Work plate is arranged furthermore outside the support point opposite to the holding part at a distance allowing the pivotal motion of the work plate and is attached at several attachment points to the holding part, in each case with the necessary degree of axial play.

Abstract: When work processing equipment and more particularly floor sanding machines have means for drawing off dust, they are also fitted with a device for aspiration of the dust laden air and the collection of the dust. The device in accordance with the invention comprises a filter device, arranged in the flow path of the air, manufactured of an air permeable material retaining the dust so that dust-free air is released into the surroundings.In the flow path upstream from the filter device there is a dust separator, which at the lower side thereof has a dust outlet opening and above the dust outlet opening has an air outlet opening facing the filter device. Underneath the dust outlet opening it is possible for a dust collecting container to be connected with the result that the separated dust drops under the effect of gravity into the container. It is convenient if the filter device delimits a filter chamber with a dust outlet opening on the lower side.