发明申请
US20040011427A1 Hydraulic circuits for tree-harvesting knuckle booms 失效
用于采伐转向节臂的液压回路

  • 专利标题: Hydraulic circuits for tree-harvesting knuckle booms
  • 专利标题(中): 用于采伐转向节臂的液压回路
  • 申请号: US10199862
    申请日: 2002-07-19
  • 公开(公告)号: US20040011427A1
    公开(公告)日: 2004-01-22
  • 发明人: William Pierre Liu
  • 主分类号: A01G023/08
  • IPC分类号: A01G023/08 B27B001/00 B23Q015/00 B23Q016/00
Hydraulic circuits for tree-harvesting knuckle booms
摘要:
A hydraulic valve is used to judiciously shunt oil from lowering ends of the hoist and stick cylinders that have been plumbed to achieve near horizontal movement. This allows the use of cylinders that have unequal rod/bore ratios or to compensate for certain transient effects that may require the exchange of oil to the reservoir. The action of the hydraulic valve acts without obtrusive operator intervention and is essentially automatic. This allows for greater flexibility in the design of the boom system, allows the boom system to perform various tasks, while not requiring obtrusive intervention from the operator.
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