Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Eisuke Oide0
Date of Patent
September 5, 2006
0Patent Application Number
105175930
Date Filed
June 6, 2003
0Patent Citations Received
Patent Primary Examiner
Patent abstract
A hydraulic tool is provided with a spool valve 24 for changing the flow of a working fluid pressurized by a hydraulic power generating mechanism in a hydraulic circuit. The spool valve 24 is slidable in directions perpendicular to a piston rod 18. A cylindrical grip handle 34 to be operated by the operator's hand is extended parallel to the piston rod 18 on the outer surface of the main casing 5 so as to be turnable about its own axis. The spool valve 24 and the grip handle 34 are interlocked by a cam mechanism including members 29, 30 and 21. The spool valve 24 is moved axially by turning the grip handle 34 to control the flow direction of the working fluid.
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