| 摘要 |
A hand-held device for directing a jet of compressed air onto a workpiece or tool for clearing debris therefrom has a housing with an outlet nozzle (9) and a duct joining it with an air inlet port (7). In the duct there are two valves put in series and one of which is a manual control valve (5) and the other is a safety valve (30) which responds to a back pressure on its downstream side by shutting off the duct. The housing is made up of three synthetic resin parts that are interlocked with each other, namely a shell member (1), a valve assembly (10) and a nozzle head (45). The synthetic resin parts have all valve elements and a trigger (4) for operation of the valve mounted between them. They are joined together by drilling holes therein when assembled and placing pins in the holes. <IMAGE> |
