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专利名称：Screw Engagement Type Clamp Device,
Clamping System, and Fluid PressureActuator
发明人：Keitaro Yonezawa,Hironori Yamada申请号：US11886517申请日：20060314
公开号：US200801924A1公开日：20080814
专利附图：
摘要：An annular piston () is inserted into a cylinder hole () of a housing () so as to bevertically movable and be prevented from rotating. Into a cylindrical hole () of the piston
(), a cylindrical rotating member () is inserted while prevented from moving vertically. Aball screw mechanism () is provided between the piston () and the rotating member (). Onan outer peripheral surface of the rotating member (), a circulation passage () whichcommunicatively connects a start end and a terminal end of a male spiral groove () isformed in a recessed manner. Into a guide hole () formed in an upper half of the housing(), an output rod () is inserted rotatably and movably vertically. An input portion () of theoutput rod () is connected to the rotating member () so as to transmit rotation. By drivingthe piston () upward, a bolt () provided on an upper end portion of the output rod () isengaged with an internal threaded hole () of a work ().
申请人：Keitaro Yonezawa,Hironori Yamada
地址：Hyogo JP,Hyogo JP
国籍：JP,JP
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