发明名称 |
Power tool, in particular a hand-held compressed air screwdriver |
摘要 |
A pneumatic screwdriver or nutsetter includes a manually actuated electrical switch and a solenoid operated motive air shutoff valve which includes a spring biased reset element for moving the shutoff valve closure element from a valve closed position to a valve open position prior to introduction of compressed air to the tool motor. The reset element is retracted away from the closure element by pressurized air upon startup of a tool operating cycle. The closure element is released upon deenergization of the solenoid at a predetermined signal to close the shutoff valve. In an alternate embodiment the switch is replaced by a pneumatic valve and the reset element is pressure air biased to move the shutoff element from the shutoff valve closed position to the open position.
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申请公布号 |
US4467877(A) |
申请公布日期 |
1984.08.28 |
申请号 |
US19820343649 |
申请日期 |
1982.01.28 |
申请人 |
DEUTSCHE GARDNER-DENVER GMBH |
发明人 |
KOLTERMANN, JUERGEN K. D.;STEIN, DIETER W.;MATTHEISS, EUGEN;POLZER, BERNHARD J. |
分类号 |
B25B23/145;(IPC1-7):B23Q5/06;F16D43/20 |
主分类号 |
B25B23/145 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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