公开(公告)号：US20200270846A1

公开(公告)日：2020-08-27

申请号：US16799685

申请日：2020-02-24

申请人： Clark Equipment Company

发明人： Kevin Zent ,  David Glasser ,  Scott LaCoe ,  Daniel Krieger ,  Matthew Kaldor

IPC分类号： E02F9/22 ,  F15B15/24

摘要： A hydraulic assembly for an extendable lift arm assembly can include an extension cylinder, a leveling cylinder, a main control valve, a flow combiner/divider, and one or more flow-blocking arrangements. The main control valve can be configured to control commanded movement of the extension and leveling cylinders of the lift arm assembly. The flow combiner/divider can be configured to hydraulically link the extension cylinder with the leveling cylinder for synchronized operation of the extension cylinder and the leveling cylinder. The one or more flow-blocking arrangements can be configured to restrict flow from rod or base ends of the leveling or extension cylinders during commanded extension or retraction of the leveling and extension cylinders, or in the absence of commanded movement of the leveling and extension cylinders, to maintain synchronized orientation of the leveling and extension cylinders.

公开(公告)号：US20220243744A1

公开(公告)日：2022-08-04

申请号：US17522180

申请日：2021-11-09

申请人： Clark Equipment Company

发明人： Kevin Zent ,  David Glasser ,  Scott LaCoe ,  Daniel Krieger ,  Matthew Kaldor

IPC分类号： F15B11/22

摘要： A hydraulic assembly for an extendable lift arm assembly can include an extension cylinder, a leveling cylinder, a main control valve, a flow combiner/divider, and one or more flow-blocking arrangements. The main control valve can be configured to control commanded movement of the extension and leveling cylinders of the lift arm assembly. The flow combiner/divider can be configured to hydraulically link the extension cylinder with the leveling cylinder for synchronized operation of the extension cylinder and the leveling cylinder. The one or more flow-blocking arrangements can be configured to restrict flow from rod or base ends of the leveling or extension cylinders during commanded extension or retraction of the leveling and extension cylinders, or in the absence of commanded movement of the leveling and extension cylinders, to maintain synchronized orientation of the leveling and extension cylinders.

公开(公告)号：US11168712B2

公开(公告)日：2021-11-09

申请号：US16799685

申请日：2020-02-24

申请人： Clark Equipment Company

发明人： Kevin Zent ,  David Glasser ,  Scott LaCoe ,  Daniel Krieger ,  Matthew Kaldor

IPC分类号： F15B11/22

摘要： A hydraulic assembly for an extendable lift arm assembly can include an extension cylinder, a leveling cylinder, a main control valve, a flow combiner/divider, and one or more flow-blocking arrangements. The main control valve can be configured to control commanded movement of the extension and leveling cylinders of the lift arm assembly. The flow combiner/divider can be configured to hydraulically link the extension cylinder with the leveling cylinder for synchronized operation of the extension cylinder and the leveling cylinder. The one or more flow-blocking arrangements can be configured to restrict flow from rod or base ends of the leveling or extension cylinders during commanded extension or retraction of the leveling and extension cylinders, or in the absence of commanded movement of the leveling and extension cylinders, to maintain synchronized orientation of the leveling and extension cylinders.