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    • 1. 发明申请
    • Fluid Dispensing
    • 流体分配
    • US20100038384A1
    • 2010-02-18
    • US11886355
    • 2006-03-16
    • Mark WallaceRyan John ChessarClive Justin EdmundsJeremy CareyMichael Cameron Bainton
    • Mark WallaceRyan John ChessarClive Justin EdmundsJeremy CareyMichael Cameron Bainton
    • B67D7/58B65D83/00B65B1/04
    • B67D1/102B67D1/0079B67D2001/0812F04B23/02
    • A fluid dosing cartridge (110) comprising a fluid reservoir (112), a delivery conduit (114) with an output nozzle (22), a nozzle socket (24), a pump chamber (42) and plunger (44), and a check valve assembly (118). The check valve assembly (118) comprises a valve housing (26), defining a valve chamber (32), and first (34), second (36) and third (38) valve ports, and first and second check valves (28, 30). Each check valve (28, 30) comprises a stainless steel ball (46) resiliently biased under the action of a spring (50) and a valve seat (48). The valve seat (48) comprises a body member (52) and a circular wall member (56) defining a valve aperture (54). The valve seat (48) is formed from an ethylene based octene polymer material to give the valve seat (48) a degree of material compliance, such that the sealing section (56a) of the wall member (56) deforms under contact with the resiliently biased stainless steel ball (46), to thereby improve the seal closure between the valve seat (48) and the stainless steel ball (46).
    • 包括流体储存器(112),具有输出喷嘴(22)的输送导管(114),喷嘴插座(24),泵室(42)和柱塞(44))的流体计量盒(110) 止回阀组件(118)。 止回阀组件(118)包括限定阀室(32)以及第一(34),第二(36)和第三(38)阀口的阀壳体(26),以及第一和第二止回阀(28, 30)。 每个止回阀(28,30)包括在弹簧(50)和阀座(48)的作用下弹性偏压的不锈钢球(46)。 阀座(48)包括主体构件(52)和限定阀孔(54)的圆壁构件(56)。 阀座(48)由乙烯基辛烯聚合物材料形成,以使得阀座(48)具有一定程度的材料柔顺性,使得壁构件(56)的密封部分(56a)在弹性地接触时变形 偏压不锈钢球(46),从而改善阀座(48)和不锈钢球(46)之间的密封封闭。