Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Koki Holdings Co Ltd
Original Assignee
Hitachi Koki Co Ltd
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Filing date
Publication date
Application filed by Hitachi Koki Co LtdfiledCriticalHitachi Koki Co Ltd
Priority to JP15536078UpriorityCriticalpatent/JPS5811499Y2/ja
Publication of JPS5570977UpublicationCriticalpatent/JPS5570977U/ja
Application grantedgrantedCritical
Publication of JPS5811499Y2publicationCriticalpatent/JPS5811499Y2/ja
Directional control valve to obtain in a hydraulic appliance the alternative motion of a piston operating to charge and fire a tool, specially suitable for hydraulic hammers