| 摘要 |
A pneumatically driven setting tool for driving in fastening elements, includes a chamber ( 17 ) forming a storage chamber ( 22 ) for storing the pressure medium produced by the compression device ( 30, 130 ) and an expansion chamber ( 26 ) adjoining the drive-in piston ( 13 ), which is displaceable in a guide ( 12 ), at a side of the drive-in piston ( 13 ) remote from the piston stem ( 14 ), communicating with the storage chamber ( 22 ), and having an opening ( 18 ) connecting the expansion chamber ( 26 ) with the drive-in piston ( 13 ), at least one check valve ( 44, 54, 142 ) arranged between the compression device ( 30, 130 ) and the chamber ( 17 ), and a piston retaining device ( 47 ) for retaining the drive-in piston ( 13 ) in its initial position ( 80 ) in which the chamber ( 17 ) is sealed against the guide ( 12 ).
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