发明名称 |
MARKER CONTROL VALVE |
摘要 |
<p>A sequencing valve utilized with a tractor-propelled planter having two row arms which pivot downward to the ground in an alternating sequence as the planter changes directions in the field. The sequencing valve is connected with the conventional hydraulic system which raises and lowers the planter at the end of each row so as to automatically lower alternate marker arms. This is achieved by pressurizing opposite ends of the sequencing valve spool for longitudinal movement through a cam means, causing the spool to rotate during movement in one direction whereby alternating lowering of the planter arms is achieved each time the planter is hydraulically lowered to the ground.</p> |
申请公布号 |
GB2133119(A) |
申请公布日期 |
1984.07.18 |
申请号 |
GB19830027090 |
申请日期 |
1983.10.11 |
申请人 |
THE * CESSNA AIRCRAFT COMPANY |
发明人 |
ROBERT MCKEE * DIEL;RICHARD CARLE * PUTNAM |
分类号 |
A01B69/02;F15B11/20;(IPC1-7):16K31/124 |
主分类号 |
A01B69/02 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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