公开(公告)号：US06234771B1

公开(公告)日：2001-05-22

申请号：US09322354

申请日：1999-05-28

申请人： Glen A. Carey ,  William R. Downing ,  David J. Lapeus ,  Randi L. Richey ,  Mary Beth Whitesel

发明人： Glen A. Carey ,  William R. Downing ,  David J. Lapeus ,  Randi L. Richey ,  Mary Beth Whitesel

IPC分类号： F04B1700

CPC分类号： F04B17/03 ,  F04B2203/0213

摘要： A precision pumping device for aspirating and dispensing different volumes of fluid is presented. The precision pumping device comprises a housing with integral anti-rotation guides, a stepper motor which drives a fine pitch lead screw, a coupling for linking the piston to the leadscrew, an anti-backlash leadscrew follower, a split hub clamp nut, and a nut for securing the chamber to the housing. A seal is provided which seals around the piston and against the chamber, as is an o-ring that is set into a groove in the chamber and seals against a flange of the seal. The precision pumping device further includes a piston and a chamber for receiving at least a portion of the piston therein. The piston and chamber are of different sizes for aspirating and dispensing different volumes of fluid. The chamber can include a single port or multiple ports. Due to the self-aligning features and the reduced number of parts, the pump can be easily changed from aspirating and dispensing a first volume of fluid to aspirating and dispensing a second volume of fluid.

摘要翻译： 提出了一种用于吸取和分配不同体积流体的精密抽吸装置。 精密泵送装置包括具有整体防旋转引导件的壳体，驱动细间距丝杆的步进马达，用于将活塞连接到丝杠的联接器，反间隙丝杠从动件，分离式轮毂夹紧螺母和 用于将腔室固定到壳体的螺母。 提供密封件，密封件围绕活塞密封并且抵靠腔室，O形环也被设置在腔室中的凹槽中并且密封抵靠密封件的凸缘。 精密泵送装置还包括活塞和用于容纳活塞的至少一部分的腔室。 活塞和腔室具有不同的尺寸，用于吸取和分配不同体积的流体。 该腔室可以包括单个端口或多个端口。 由于自对准特征和部件数量的减少，泵可以容易地从抽吸和分配第一体积的流体改变以吸取和分配第二体积的流体。