- 专利标题: Shift controlled bypass orifice for hydrostatic transmission
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申请号: US11509377申请日: 2006-08-24
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公开(公告)号: US07430861B2公开(公告)日: 2008-10-07
- 发明人: Douglas Dean Korthals
- 申请人: Douglas Dean Korthals
- 申请人地址: US IL Moline
- 专利权人: Deere & Company
- 当前专利权人: Deere & Company
- 当前专利权人地址: US IL Moline
- 主分类号: F16H61/40
- IPC分类号: F16H61/40 ; F04B23/00
摘要:
A shift controlled bypass orifice for a hydrostatic transmission includes a pump valve body with high pressure ports through which hydraulic fluid flows between a pump and a motor, a bypass orifice extending between the high pressure ports and the outside of the pump valve body, a bleed poppet movable between a closed position blocking the bypass orifice and an open position opening the bypass orifice, and a poppet push pin moving the bleed poppet toward the open position if the hydrostatic transmission is in neutral, and toward the closed position if the hydrostatic transmission is in forward or reverse.
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