发明名称 Press assembly
摘要 A press assembly includes first and second members which engage opposite sides of a workpiece during operation of the press assembly. A cushion assembly is provided to absorb force transmitted from at least one of the members during operation of the press assembly. A high pressure reservoir is connected in fluid communication with a cylinder of the cushion assembly to receive fluid during operation of the press assembly. Hydraulic fluid is supplied to the cushion assembly at a relatively low pressure during operation of the press assembly. A valve is operable to block a flow of hydraulic fluid from the cushion assembly as the press assembly begins to operate from a closed condition toward an open condition to thereby retain the cushion assembly in a retracted condition. A secondary or pump cylinder may be actuated by operation of the press assembly to pump hydraulic fluid to the cushion assembly. A modulating valve is operable to modulate the fluid pressure conducted from the pump cylinder assembly to the cushion cylinder assembly during operation of the press assembly.
申请公布号 US5966981(A) 申请公布日期 1999.10.19
申请号 US19980098081 申请日期 1998.06.16
申请人 TELEDYNE INDUSTRIES, INC. 发明人 JANOS, JOSEPH J.;KELM, HENRY J.
分类号 B21D24/02;B21D24/14;(IPC1-7):B21D22/00 主分类号 B21D24/02
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