Method and apparatus for automatically counterbalancing pumping apparatus on oil wells

• 1. 游梁式抽油机的自动平衡方法和游梁式自动调平抽油机 [P] . 中国专利： CN109236248B . 2021.10.29
• 2. 游梁式抽油机的自动平衡方法和游梁式自动调平抽油机 [P] . 中国专利： CN109236248A . 2019-01-18
• 3. Method and apparatus for counterbalancing oil well pumping apparatus [P] . 美国专利： US2122871A . 1938-07-05

  机译： 平衡油井抽水设备的方法和设备

• 4. Apparatus and method for ensuring the oil supply of the secondary circuit of a hydraulic circuit of a multistage automatic transmission of a motor vehicle, comprising a transmission input side drivable main oil pump and an electrically drivable, with the primary circuit of the hydraulic circuit, which is connected to the addition of oil pump fluid [P] . 德国专利： DE102015205199A1 . 2016-09-29

  机译： 用于确保机动车辆的多级自动变速器的液压回路的二次回路的供油的装置和方法，该装置和方法包括变速器输入侧可驱动的主油泵和电动的，具有液压回路的主回路的油，与油泵油的添加有关

• 5. Automatic counterbalance for well pumping apparatus [P] . 美国专利： US2808735A . 1957-10-08

  机译： 井抽设备的自动平衡

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