公开(公告)号：US5154589A

公开(公告)日：1992-10-13

申请号：US610955

申请日：1990-11-09

申请人： Mark A. Ruhl ,  William M. Hamilton ,  John M. Bronw, Jr. ,  Richard N. Bennett

发明人： Mark A. Ruhl ,  William M. Hamilton ,  John M. Bronw, Jr. ,  Richard N. Bennett

IPC分类号： F04B49/22 ,  F04B53/10

CPC分类号： F04B53/1057 ,  F04B49/225 ,  Y10T137/6307 ,  Y10T137/7559

摘要： A metering pump wherein the head is provided with internal threads terminating adjacent to internal shoulders at each of the pump cylinder, inlet valve and outlet valve ports. The cylinder, inlet valve and outlet valve each include a flange secured to the shoulder by a collar threadably received in each of the ports. O-rings are provided in a circumferential groove in the body or cylinder of the pump inlet valves and outlet valves downstream of the flange. A piston pump structure includes a bushing mounted to the piston rod between the piston head and a second breakaway stop connected to the piston rod. The piston head includes a plurality of circumferential grooves for receiving respectively a cup seal or an O-ring seal. A suck-back mechanism is provided in a bore in the head and includes a stem having an eccentric cam which interacts with the valve structure to adjust the degree of closure by rotation of the stem.

摘要翻译： 计量泵，其中头部设置有在每个泵缸，入口阀和出口阀口处与内肩相邻的内螺纹。 气缸，入口阀和出口阀各自包括通过可螺纹地容纳在每个端口中的轴环固定到肩部的凸缘。 O型圈设置在泵入口阀体的主体或气缸中的周向凹槽中，并在法兰下游设有出口阀。 活塞泵结构包括安装到活塞杆之间的衬套，活塞头与活塞杆连接的第二分离止动件。 活塞头包括多个圆周槽，分别用于容纳杯密封件或O形密封圈。 吸头机构设置在头部的孔中，并且包括具有偏心凸轮的杆，所述偏心凸轮与阀结构相互作用以通过杆的旋转来调节闭合度。