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    • 3. 发明授权
    • Vacuum adjustment mechanism particularly adapted for a breastpump
    • 真空调节机构特别适用于吸乳器
    • US06481986B1
    • 2002-11-19
    • US09675888
    • 2000-09-29
    • Brian H. SilverLarry D. AnnisDavid A. Bates
    • Brian H. SilverLarry D. AnnisDavid A. Bates
    • F04B4100
    • F04B45/047A61M1/0037A61M1/06F04B9/045F04B43/0063F04B49/225
    • An improved vacuum adjustment mechanism for controlling airflow into a chamber which is subject to negative pressure, such as the chamber of a diaphragm pump which is generating vacuum for a breast shield assembly, has an air inlet conduit communicating with the chamber. A channel is formed in a base member, with the channel having a longitudinal length and a dimension perpendicular to that length. The perpendicular dimension varies from a minimum to a maximum. The channel has a bottom and is open, such as along a channel top. An airhole is formed in the channel bottom at the point of the maximum dimension. A rotary member is mounted on the base member, and has an internal channel extending across the longitudinal length of the base member channel, and overlies the channel top. The internal channel of the rotary member communicates with an air source, such as ambient air. The rotary member serves to move the internal channel along the longitudinal length of the base member channel, to thereby regulate airflow into the base member channel depending upon where the internal channel is positioned between the minimum and maximum dimensions.
    • 改进的真空调节机构用于控制进入负压的室内的气流,例如为乳房罩组件产生真空的隔膜泵室,具有与腔室连通的空气入口导管。 通道形成在基部构件中,其中通道具有纵向长度和垂直于该长度的尺寸。 垂直尺寸从最小到最大不等。 通道具有底部并且是开放的,例如沿着通道顶部。 在最大尺寸的位置,在通道底部形成一个通气孔。 旋转构件安装在基座构件上,并且具有延伸穿过基部构件通道的纵向长度的内部通道,并且覆盖在通道顶部上。 旋转构件的内部通道与诸如环境空气的空气源连通。 旋转构件用于沿着基部构件通道的纵向长度移动内部通道,从而根据内部通道在最小和最大尺寸之间的位置来调节进入基部构件通道的气流。