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1. 发明授权

US5718570A Rotary control valve for a piston pump 失效
标题翻译：活塞泵用旋转控制阀
公开(公告)号：US5718570A
公开(公告)日：1998-02-17
申请号：US407405
申请日：1995-03-20
申请人： Carl D. Beckett , Kevin O'Hara , Daniel B. Olsen
发明人： Carl D. Beckett , Kevin O'Hara , Daniel B. Olsen
IPC分类号： F16H39/10
CPC分类号： F16H39/10 , Y10T137/86638
摘要： A reciprocating piston pump provides pulsation free delivery of liquid. It is suitable for use in compact environments or for the delivery of small amounts of liquid, as in chromatographic analysis devices. The pump includes two pistons with pumping chambers that are alternately connected to inflow and outflow lines through a control valve. The control valve moves between a first position in which inflow is directed to the first piston chamber and outflow to the second piston chamber, and a second position in which outflow is directed to the first piston chamber and inflow is directed to the second piston chamber. Each outflow pulse from the piston is sustained longer than each inflow pulse, and the outflow pulses are staggered and partially superimposed to provide substantially pulsation free delivery of liquid from the pump. A rotating cam moves the pistons of the pumps and the control valve between their operating positions described above. The cam rotates at a constant speed around an axis that is parallel to the axis of movement of the piston pumps.
摘要翻译：往复式活塞泵提供无脉动的液体输送。如在色谱分析装置中，适用于紧凑型环境或少量液体的输送。该泵包括两个具有泵送室的活塞，其通过控制阀交替地连接到流入和流出管路。控制阀在流入第一活塞室的第一位置和第二活塞室流出的第一位置和第二位置之间移动，在第二位置，流出流向第一活塞室，流入被引导到第二活塞室。来自活塞的每个流出脉冲比每个流入脉冲持续更长的时间，并且流出脉冲交错并且部分地叠加以提供液体从泵基本上无脉动地输送。旋转凸轮将泵的活塞和控制阀在上述操作位置之间移动。凸轮围绕平行于活塞泵的运动轴线的轴线以恒定的速度旋转。

2. 发明授权

US5733105A Axial cam driven valve arrangement for an axial cam driven parallel piston pump system 失效
标题翻译：用于轴向凸轮驱动的平行活塞泵系统的轴向凸轮驱动阀装置
公开(公告)号：US5733105A
公开(公告)日：1998-03-31
申请号：US618367
申请日：1996-03-19
申请人： Carl D. Beckett , Kevin D. O'Hara , Daniel B. Olsen , Steven E. Soar , Glenn E. Siemer
发明人： Carl D. Beckett , Kevin D. O'Hara , Daniel B. Olsen , Steven E. Soar , Glenn E. Siemer
IPC分类号： F04B1/12
CPC分类号： F04B1/12 , Y10T137/86638 , Y10T137/8671
摘要： A reciprocating piston pump provides pulseless delivery of liquid. It is suitable for use in compact environments or for the delivery of small amounts of liquid, as in chromatographic analysis devices. The pump includes two pistons with pumping chambers that are alternately connected to inflow and outflow lines through a control valve. The control valve moves between a first position in which inflow is directed to the first piston chamber and outflow to the second piston chamber, and a second position in which outflow is directed to the first piston chamber and inflow is directed to the second piston chamber. Each outflow pulse from the piston is sustained longer than each inflow pulse, and the outflow pulses are staggered and partially superimposed to provide substantially pulseless delivery of liquid from the pump. A rotating cam moves the pistons of the pumps and the control valve between their operating positions described above. The cam rotates at a constant speed around an axis that is parallel to the axis of movement of the piston pumps. A control surface is carried by and rotated by the cam in one embodiment. Grooves inscribed in the control surface establish and break fluid connections as the cam rotates.
摘要翻译：往复式活塞泵提供无脉动的液体输送。如在色谱分析装置中，适用于紧凑型环境或少量液体的输送。该泵包括两个具有泵送室的活塞，其通过控制阀交替地连接到流入和流出管路。控制阀在流入第一活塞室的第一位置和第二活塞室流出的第一位置和第二位置之间移动，在第二位置，流出流向第一活塞室，流入被引导到第二活塞室。来自活塞的每个流出脉冲比每个流入脉冲持续更长的时间，并且流出脉冲交错并且部分地叠加以提供来自泵的基本上无脉动的液体输送。旋转凸轮将泵的活塞和控制阀在上述操作位置之间移动。凸轮围绕平行于活塞泵的运动轴线的轴线以恒定的速度旋转。在一个实施例中，控制表面由凸轮承载和旋转。刻在控制面上的凹槽随着凸轮的旋转而建立和断开流体连接。

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