Work-actuated rotary brush

Claim 1

A WORK-ACTUATED ROTARY BRUSH COMPRISING: AN ELONGATED HANDLE-TYPE CASING; A MOTOR WITHIN SAID CASING; A STUD SHAFT FIXED IN SAID CASING AND EXTENDING AXIALLY IN A DIRECTION SUBSTANTIALLY PERPENDICULAR TO THE LENGTHWISE DIRECTION OF THE CASING; A TUBULAR ELEMENT HAVING A FIRST END SLIDABLY AND ROTATABLY MOUNTED ON SAID STUD SHAFT; A SECOND SHAFT COAXIAL WITH AND AXIALLY SPACED FROM SAID STUD SHAFT, SAID SECOND SHAFT HAVING ONE END REMOVABLY MOUNTED IN SAID TUBULAR ELEMENT AT AN END OF THE LATTER OPPOSITE ITS FIRST END FOR ROTATION THEREWITH; BRISTLES AT THE OTHER END OF SAID SECOND SHAFT AND LOCATED OUTSIDE SAID CASING; A DRIVING CLUTCH PORTION DRIVINGLY CONNECTED TO SAID MOTOR; A DRIVEN CLUTCH PORTION ON SAID TUBULAR ELEMENT; SAID TUBULAR ELEMENT BEING SLIDABLY MOUNTED ON SAID STUD SHAFT FOR AXIAL MOVEMENT, WITH SAID SECOND SHAFT AND SAID DRIVEN CLUTCH PORTION, BETWEEN A FIRST POSITION IN WITH THE DRIVEN CLUTCH PORTION IS DISENGAGED FROM THE DRIVING CLUTCH PORTION AND A SECOND POSITION IN WHICH THE TWO CLUTCH PORTIONS ARE DRIVINGLY ENGAGED; AND MEANS NORMALLY URGING SAID TUBULAR ELEMENT TO SAID FIRST POSITION.