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    • 6. 发明授权
    • Hydraulic system for synchronized extension of multiple cylinders
    • 液压系统可同步延伸多个气缸
    • US07047738B2
    • 2006-05-23
    • US10894713
    • 2004-07-20
    • Eugene C. Bair
    • Eugene C. Bair
    • F15B7/00
    • F15B11/22
    • A lift table maintains levelness while lifting a support surface via two or more lift cylinder assemblies. A hydraulic circuit is connected to the cylinder assemblies, and includes synchronizer with multiple isolated chambers corresponding to the lift cylinder assemblies, a rod extending axially through the chambers, and pistons mounted on the rod and associated with the isolated chambers. An axial passageway extends continuously through the rod and is connected to first passageways for communicating hydraulic fluid to one side of the chambers. The hydraulic circuit operably connects a pump to the axial passageway of the synchronizer and to second passageways connected to the chambers and to the cylinder assemblies for controlling and providing synchronized movement of the at least two lift cylinder assemblies. The hydraulic circuit includes valving for an automatic re-synchronization cycle, fill cycle, and air purge cycle.
    • 升降台在通过两个或多个提升缸组件提升支撑表面时保持水平。 液压回路连接到气缸组件,并且包括与对应于提升气缸组件的多个隔离室的同步器,轴向延伸穿过室的杆以及安装在杆上并与隔离室相关联的活塞。 轴向通道连续延伸穿过杆并且连接到第一通道,用于将液压流体连通到腔室的一侧。 液压回路将泵可操作地连接到同步器的轴向通道和连接到腔室和气缸组件的第二通道,用于控制和提供至少两个提升气缸组件的同步运动。 液压回路包括用于自动重新同步循环,填充循环和空气吹扫循环的阀。