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    • 13. 发明授权
    • Pump with back suction phase
    • 泵具有背吸相
    • US5549223A
    • 1996-08-27
    • US285386
    • 1994-08-03
    • Nobuaki Hori
    • Nobuaki Hori
    • B05B11/00B67D5/42G01F11/04
    • B05B11/3001B05B11/0005B05B11/0062B05B11/3047B05B11/306B05B11/3067B05B11/3097
    • The present invention provides a pump for pumping fluids, especially highly viscous fluids such as shampoo, from a main fluid container through a nozzle without unwanted dripping, plugging, or mess. A piston reciprocates in a pump chamber, creating positive and negative pressure alternately in the pump chamber. Positive pressure in the pump chamber initiates a discharge phase of operation, wherein the fluid in the pump chamber is forced from the pump chamber through a discharge valve. Negative pressure in the pump chamber causes both a back-suction phase and a suction phase of operation. Back-suction occurs in the pump chamber immediately following the discharge phase, drawing any fluid remaining in an exit passage back through the discharge valve into the pump chamber. The suction phase starts immediately after the discharge valve closes at the end of the back-suction phase. During the suction phase, the negative pressure in the pump chamber draws fluid from the main fluid container through the suction valve and into the pump chamber. A resilient spring member biases the suction valve into a closed position during periods of non-use, especially when the pressure in the main fluid container increases due to an increase in temperature. The strength of the resilient spring member is established at a value which maintains the suction valve closed until a predetermined negative pressure is established across it.
    • 本发明提供一种用于从主流体容器通过喷嘴泵送流体,特别是高粘性流体如洗发剂的泵,而不会有不必要的滴落,堵塞或混乱。 活塞在泵室中往复运动,在泵室中交替产生正压和负压。 泵室中的正压开启排放操作阶段,其中泵室中的流体通过排出阀从泵室被迫动。 泵室中的负压导致操作的背吸相和抽吸相。 在泵室中立即在排放阶段发生背吸,将出口通道中剩余的任何流体通过排放阀返回到泵室中。 在抽吸阶段结束后,排放阀关闭后立即开始抽吸阶段。 在抽吸阶段期间,泵室中的负压通过吸入阀从主流体容器吸入流体并进入泵室。 弹性弹簧构件在不使用期间将吸入阀偏压到关闭位置,特别是当主流体容器中的压力由于温度升高而增加时。 弹性弹簧构件的强度建立在使吸气阀保持关闭直到在其周围建立预定的负压之前的值。