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1. 发明授权

US5346381A Apparatus for preparation of samples for spectrographic analysis 失效
标题翻译：用于制作光谱分析样品的装置
公开(公告)号：US5346381A
公开(公告)日：1994-09-13
申请号：US952263
申请日：1992-09-28
申请人： Joseph Marcovecchio , Joseph K. Katzenberger
发明人： Joseph Marcovecchio , Joseph K. Katzenberger
IPC分类号： B30B11/00 , B30B15/22 , G01N1/28 , B29C43/00
CPC分类号： B30B15/22 , B30B11/005 , G01N1/286
摘要： An apparatus for compressing a workpiece is disclosed. The apparatus has a die to receive the workpiece in powdered or other form. An abutment holds the workpiece in a fixed position against the application of force, while a hydraulic cylinder is positioned to exert force against the die in the direction toward the abutment. A pump feeds hydraulic fluid to the hydraulic cylinder, and a pressure control valve is coupled to the hydraulic cylinder to control the maximum pressure in the hydraulic cylinder. The pressure control valve has a sealing member, a seat which engages the sealing member with the sealing member closing the outlet, a spring which urges the sealing member towards the seat, closing the outlet, and a backing member putting the spring under compression by maintaining a distance between the backing member and the seat. A stepping motor is rigidly mounted with respect to the seat. The stepping motor has a shaft which may be advanced towards and away from the valve seat whereby the degree of compression on the spring may be adjusted.
摘要翻译：公开了一种压缩工件的装置。该设备具有用于以粉末状或其他形式接收工件的模具。一个支座将工件固定在一个固定的位置以抵抗施加力，同时一个液压缸被定位成沿朝向邻接的方向向模具施加力。泵将液压油供给到液压缸，并且压力控制阀联接到液压缸以控制液压缸中的最大压力。压力控制阀具有密封构件，与密封构件接合密封构件和闭合出口的座，弹簧，其朝向座椅推动密封构件，封闭出口;以及背衬构件，通过保持将弹簧压缩在压缩状态背衬构件和座椅之间的距离。步进电机相对于座椅刚性地安装。步进电机具有可朝向和远离阀座推进的轴，从而可以调节弹簧上的压缩程度。

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