| 摘要 |
The air or liquid is supplied to a grinder through a handle with a built-in valve. By turning the handle (1) the valve opens or closes. The valve body itself (7,9) is secured to a stay in the form of a bolt (10) and a pipe (8) screwed into the bottom of the handle casing (1), whereas the valve seat (14) is formed as a recess in a bush (2) being stationary relative to the casing. The handle has an oblique track (4) wherein a bolt (3) secured in the bush moves the casing (1) and thereby the valve body relative to the bush (2) when the handle is turned. When the handle is released in the open position of the valve (Figure 3) (not shown), the pressure exerted by the medium will move the casing so as to close the valve since the area of the casing is larger than that of the bush (2). The machine can thereby be safely and reliably disconnected by releasing the hold on the handle. The valve can be used for a hand grinder with a U-shaped handle pipe with handle ends and a hollow spindle situated between the handle ends, an air machine being arranged in the spindle. The spindle has a number of slotted grinding discs, and a pressure medium is admitted to the machine through passages in the handle pipe. <IMAGE> |
