发明名称 |
Furrow opener assembly with integral down-pressure adjustment |
摘要 |
A shank assembly including a rearwardly opening bracket pivotally mounting a shank. A tension link extends upwardly from a central portion of the shank and through an apertured strap. A stop member at the upper end of the link limits the downward rocking of the shank. An adjustable arm assembly including a trunnion slidably received over the tension link is pivotally connected to the bracket and adjustably compresses a down-pressure spring which encircles the link between the trunnion and the shank. Individual down-pressure adjustments can be made without affecting the transport height of the assembly.
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申请公布号 |
US4700785(A) |
申请公布日期 |
1987.10.20 |
申请号 |
US19860843418 |
申请日期 |
1986.03.24 |
申请人 |
DEERE & COMPANY |
发明人 |
BARTUSEK, ROBERT J.;STEILEN, RONALD M.;RETTIG, VERNON E. |
分类号 |
A01B35/24;A01B61/04;(IPC1-7):A01B35/24 |
主分类号 |
A01B35/24 |
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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