发明授权
- 专利标题: Hydraulic suspension hitch system
- 专利标题(中): 液压悬挂系统
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申请号: US13169369申请日: 2011-06-27
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公开(公告)号: US08683720B2公开(公告)日: 2014-04-01
- 发明人: David E. Ault , Jeffrey L. Kuehn
- 申请人: David E. Ault , Jeffrey L. Kuehn
- 申请人地址: US IL Peoria
- 专利权人: Caterpillar Inc.
- 当前专利权人: Caterpillar Inc.
- 当前专利权人地址: US IL Peoria
- 代理商 Bart A. Fisher
- 主分类号: E02F3/65
- IPC分类号: E02F3/65 ; E02F9/02
摘要:
The present disclosure provides a hitch suspension system that reduces a transfer of energy (e.g., provides a smoother ride) between two bodies hitched together, such as between a towing vehicle and a towed vehicle/trailer. In an embodiment, the suspension system includes a hydraulic cylinder with an extendable rod in fluid communication with a fluid pump. A control valve is fluidly coupled between the hydraulic cylinder and the fluid pump and is configured to adjust an extension length of the rod. Additionally, a variable orifice that adjusts resistance to extension and retraction of the rod is fluidly coupled between the hydraulic cylinder and the control valve. A first fixed restrictive element is fluidly coupled in series with the variable orifice to dissipate energy ad the rod extends and a second fixed restrictive element is fluidly coupled in series with the variable orifice to dissipate energy as the rod retracts.
公开/授权文献
- US20120324767A1 HYDRAULIC SUSPENSION HITCH SYSTEM 公开/授权日:2012-12-27
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