GB2086717A

GB2086717A - Improvements in or relating to brushes for electric carpet brushes

Info

Publication number: GB2086717A
Application number: GB8132368A
Authority: GB
Original assignee: Vorwerk and Co Interholding GmbH
Current assignee: Vorwerk and Co Interholding GmbH
Priority date: 1980-10-31
Filing date: 1981-10-27
Publication date: 1982-05-19
Also published as: ES261140U; FR2493132A1; ES261140Y; IT8136105V0; IT1142977B; IT8149587A0; DE8028996U1

Abstract

A revolving brush (1) for an electric carpet sweeper, the brush having opposite ends (2) provided with bearings (8). Each end of the brush is provided with a recess (4) which decreases in its depth towards the adjacent end of the brush. In use of a carpet sweeper incorporating the brush, the recess (4) causes threads to be picked up and collected in the deepest point (5) of the recess so that the threads are not drawn into an interstice (11) between moving and non-moving parts of the brush. <IMAGE>

Description

SPECIFICATION Improvements in or relating to brushes for electric carpet sweepers This invention relates to revolving brushes for electric carpet sweepers.

With known revolving brushes for electric carpet sweepers, it continues to happen that threads which are on the carpet to be cleaned are so picked up by the tufts of bristles arranged on the revolving brush that these threads are drawn into the gap between the revolving brush and bearings in which the brush is mounted. If then more threads are drawn in over a period of time, then the mounting is damaged and/or destroyed. In addition, it is disadvantageous that a thread which has been thus drawn in can no longer be noticed by the operator of the carpet sweeper and thus also cannot be removed, in order to prevent the destruction of the bearing/mounting.

According to the present invention, there is provided a revolving brush for an electric carpet sweeper, the brush having opposite ends provided with bearings and each end of the brush being provided with a circumferential recess which decreases in its depth towards the adjacent end of the brush.

For a better understanding of the invention and to show how the same may be carried into effect, reference will now be made, by way of example, to the accompanying drawing, in which: Figure 1 shows a revolving brush according to the invention for a carpet sweeper, and Figure 2 shows a partial section of part of the brush shown in Fig. 1.

The drawing shows a revolving tufted brush 1 for a carpet sweeper, the brush being provided at its opposite ends 2 with a circumferential recess 4 (only one end 2 being shown-the other end being a mirror image of the end. 2). The depth of each recess 4 decreases towards the respective adjacent end of the brush 1 so that each recess 4 has its deepest point 5 arranged furthest from the end 2.

A fixed shaft 7 extends through the brush 1 and the brush 1 is able to rotate about this shaft 7, since it is mounted on the shaft 7 by means of plain bearings 8 at each end of the brush. The shaft 7 has end caps 9 which engage over the ends 2 of the brush 1 by means of a flange 10. With known brushes, a thread which is picked up on the floor would be taken up by a tuft 6 of bristles and drawn into an interstice 11. As a result, the easy running of the sweeper would in time be considerably impaired.

In the construction according to the present invention, however, what now happens is that a thread is picked up by the bristle tuft 6 and then slides along the recess 4 to the deepest point 5. Threads which are picked up are thus collected in the deepest point 5 and are not drawn into the interstice 11.

Thus, threads which are possibly picked up can even be seen by the operator, which is not possible with threads which enter the interstice 11. The operator is thus given the chance to remove the threads in good time to prevent harm to the apparatus.

In the example shown, the tuft 6 at each end of the brush is inclined so as to point in the direction of the adjacent end 2, the tuft 6 extending from the recess 4 at and adjacent the deepest point 5.

1. A revolving brush for an electric carpet sweeper, the brush having opposite ends provided with bearings and each end of the brush being provided with a circumferential recess which decreases in its depth towards the adjacent end of the brush.

2. A brush as claimed in claim 1, wherein a brush tuft is arranged at each end of the brush, each tuft extending from said recess and being inclined so as to point in the direction of the adjacent end of the brush.

3. A revolving brush for an electric carpet sweeper, substantially as hereinbefore described with reference to the accompanying drawing.

4. An electric carpet sweeper having a revolving brush as claimed in any one of the preceding claims.

**WARNING** end of DESC field may overlap start of CLMS **.

Claims

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION Improvements in or relating to brushes for electric carpet sweepers This invention relates to revolving brushes for electric carpet sweepers. With known revolving brushes for electric carpet sweepers, it continues to happen that threads which are on the carpet to be cleaned are so picked up by the tufts of bristles arranged on the revolving brush that these threads are drawn into the gap between the revolving brush and bearings in which the brush is mounted. If then more threads are drawn in over a period of time, then the mounting is damaged and/or destroyed. In addition, it is disadvantageous that a thread which has been thus drawn in can no longer be noticed by the operator of the carpet sweeper and thus also cannot be removed, in order to prevent the destruction of the bearing/mounting. According to the present invention, there is provided a revolving brush for an electric carpet sweeper, the brush having opposite ends provided with bearings and each end of the brush being provided with a circumferential recess which decreases in its depth towards the adjacent end of the brush. For a better understanding of the invention and to show how the same may be carried into effect, reference will now be made, by way of example, to the accompanying drawing, in which: Figure 1 shows a revolving brush according to the invention for a carpet sweeper, and Figure 2 shows a partial section of part of the brush shown in Fig. 1. The drawing shows a revolving tufted brush 1 for a carpet sweeper, the brush being provided at its opposite ends 2 with a circumferential recess 4 (only one end 2 being shown-the other end being a mirror image of the end. 2). The depth of each recess 4 decreases towards the respective adjacent end of the brush 1 so that each recess 4 has its deepest point 5 arranged furthest from the end 2. A fixed shaft 7 extends through the brush 1 and the brush 1 is able to rotate about this shaft 7, since it is mounted on the shaft 7 by means of plain bearings 8 at each end of the brush. The shaft 7 has end caps 9 which engage over the ends 2 of the brush 1 by means of a flange 10. With known brushes, a thread which is picked up on the floor would be taken up by a tuft 6 of bristles and drawn into an interstice 11. As a result, the easy running of the sweeper would in time be considerably impaired. In the construction according to the present invention, however, what now happens is that a thread is picked up by the bristle tuft 6 and then slides along the recess 4 to the deepest point 5. Threads which are picked up are thus collected in the deepest point 5 and are not drawn into the interstice 11. Thus, threads which are possibly picked up can even be seen by the operator, which is not possible with threads which enter the interstice 11. The operator is thus given the chance to remove the threads in good time to prevent harm to the apparatus. In the example shown, the tuft 6 at each end of the brush is inclined so as to point in the direction of the adjacent end 2, the tuft 6 extending from the recess 4 at and adjacent the deepest point 5. CLAIMS