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1. 发明授权

US5816340A Rolling cultivator shield 失效
标题翻译：滚动耕耘机盾
公开(公告)号：US5816340A
公开(公告)日：1998-10-06
申请号：US828770
申请日：1997-04-01
申请人： Philip David Cox , James Thomas Noonan , David Lee Colgan
发明人： Philip David Cox , James Thomas Noonan , David Lee Colgan
IPC分类号： A01B23/06 , A01B35/18 , A01B17/00
CPC分类号： A01B23/06 , A01B35/18
摘要： A large diameter, short toothed rolling shield fabricated by vacuum forming talc filled polyethylene sheet having a smooth surface and sufficient flexibility to resist soil build-up in damp conditions. Preferably the diameter of the shield is substantially greater than twenty inches and on the order of twenty four inches and includes teeth uniformly spaced around the periphery, each tooth having a length less than approximately ten percent of the shield radius. A circular rib near the center of the shield and radial reinforcing ribs extending from the circular rib on the convex side of the shield to the base of alternating teeth provide stiffness and strength. The concave tool side of the shield is devoid of protrusions to reduce churning of thrown soil.
摘要翻译：通过真空成型滑石填充的聚乙烯片材制成的具有光滑表面和足够柔韧性的大直径短齿形滚动屏蔽件，以抵抗潮湿条件下的土壤积聚。优选地，屏蔽件的直径基本上大于二十英寸并且大约二十四英寸，并且包括围绕周边均匀间隔开的齿，每个齿的长度小于屏蔽半径的大约百分之十。屏蔽中心附近的圆形肋条和从护罩的凸面上的圆形肋延伸到交替的齿的基部的径向加强筋提供刚度和强度。护罩的凹形工具侧没有突起，以减少扔土的搅拌。

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