会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 4. 发明授权
    • Pump jack drive apparatus
    • 泵千斤顶驱动装置
    • US4438628A
    • 1984-03-27
    • US218038
    • 1980-12-19
    • Reginald D. Creamer
    • Reginald D. Creamer
    • F04B47/02F04B35/00
    • F04B47/022Y10S417/904
    • A pump jack drive apparatus includes a pair of hydraulic cylinders connected to a walking beam of the pump jack for reciprocating the horsehead, and a pair of microswitches or proximity switches which are closed by the walking beam at the limits of the stroke thereof for controlling such stroke. The cylinders are driven and controlled by a pump and control unit which includes a valve for feeding hydraulic fluid to one or the other of the hydraulic cylinders, a control cylinder for controlling the valve, and two solenoid operated control valves for controlling movement of the control cylinder in response to closing of the switches by the walking beam.
    • 泵千斤顶驱动装置包括连接到用于使马头往复运动的泵千斤顶的步进梁的一对液压缸,以及一对微型开关或接近开关,其在其行程极限处由步进梁封闭,用于控制这些 行程。 气缸由泵和控制单元驱动和控制,泵和控制单元包括用于将液压流体供应到一个或另一个液压缸的阀,用于控制阀的控制气缸和用于控制控制的两个电磁操作控制阀 响应于通过步进梁关闭开关的气缸。