| 摘要 |
<p>A hand machine tool having an extraction nozzle (22), and a dust bag (28) or filtering bag, the opening (30) of which detachably encompasses the extraction nozzle (22), is protected against swarf and dust escaping from the dust bag into the interior of the fan chamber by nozzle (22) having at its free end a valve, which closes the extraction nozzle (22) as soon as the motor of the hand machine tool is switched off. The valve opens the nozzle (22) when the motor is switched back on. The valve is formed by a fitting piece (26) which carries the dust bag. In the absence of air flow, a thin-walled end region (40) of the fitting piece (26) collapses and folds downwards under the effect of gravity.</p> |
