专利名称：PNEUMATIC HOLDING DEVICE发明人：MAYER M,DT申请号：US28957272申请日：19720915公开号：US3811667A公开日：19740521
摘要：A holding or clamping device of the type comprising two pressure cylindersadapted to produce a first preliminary weak holding force and subsequently a greaterholding force is provided with a sensor pin adapted to bring about a switch over fromoperation of the first cylinder to the second cylinder. The sensor pin is so loaded that itwill only bring about the switching over when it strikes a hard object such as metal but isnot actuated when it comes into contact with the human hand.
申请人：MAYER M,DT
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