| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 21 | Improvement in harrows | US40614D | US40614A | 1863-11-17 | ||
| 22 | SELF-PROPELLED SOIL WORKING MACHINES | US15075461 | 2016-03-21 | US20160249520A1 | 2016-09-01 | Kevin V. Keigley |
| Unique self-propelled soil working machines are disclosed. In certain exemplary embodiments the self propelled soil working machine includes a tool carrier which is actively adjustable to provide variable downward force on a soil working tool via a suspension element which is further passively responsive to accommodate motion of the tool in response to external force. In certain exemplary embodiments, the tool carrier is configured to adjust the working depth and pitch of the tool. Further embodiments, forms, objects, features, advantages, aspects, and benefits shall become apparent from the following description and figures. | ||||||
| 23 | Self-propelled soil working machines | US13860367 | 2013-04-10 | US09332687B2 | 2016-05-10 | Kevin V. Keigley |
| Unique self-propelled soil working machines are disclosed. In certain exemplary embodiments the self propelled soil working machine includes a tool carrier which is actively adjustable to provide variable downward force on a soil working tool via a suspension element which is further passively responsive to accommodate motion of the tool in response to external force. In certain exemplary embodiments, the tool carrier is configured to adjust the working depth and pitch of the tool. Further embodiments, forms, objects, features, advantages, aspects, and benefits shall become apparent from the following description and figures. | ||||||
| 24 | SELF-PROPELLED SOIL WORKING MACHINES | US13860367 | 2013-04-10 | US20130264080A1 | 2013-10-10 | Kevin V. Keigley |
| Unique self-propelled soil working machines are disclosed. In certain exemplary embodiments the self propelled soil working machine includes a tool carrier which is actively adjustable to provide variable downward force on a soil working tool via a suspension element which is further passively responsive to accommodate motion of the tool in response to external force. In certain exemplary embodiments, the tool carrier is configured to adjust the working depth and pitch of the tool. Further embodiments, forms, objects, features, advantages, aspects, and benefits shall become apparent from the following description and figures. | ||||||
| 25 | Method and apparatus for a floating frame field harrow | US846147 | 1997-04-25 | US5862764A | 1999-01-26 | Tosh Umemoto |
| A method and apparatus for a harrow is provided, and more particularly to a harrow implement with a terrain following frame, able to be pulled by a tractor. The improved harrow includes a main frame that supports at least a floating frame on which harrowing blades are attached. The harrow blades follow the contours of a field or bed of soil, resulting in greatly improved tilling when compared to conventional apparatus used for this purpose. The harrow specifically suits the needs of a reduced tillage farming operation. The harrow is wide, yet the floating frames follow irregular surface contours, significantly improving the potential range of topography that can be farmed efficiently. The harrow can include a clod diverter to move or deflect clods to the irrigation furrows, away from the planting rows. It can also be customized in the field to handle the individual field's requirements, including tilling depth and seed row separation distances. The harrow can also incorporate a spray rigging that applies sprays onto the soil as it is tilled. | ||||||
| 26 | Harrow | US7121536 | 1936-03-27 | US2050905A | 1936-08-11 | TUNE GEORGE H |
| 27 | Harrow | US37643229 | 1929-07-06 | US1786194A | 1930-12-23 | DICKINSON DEAN D |
| 28 | Harrow | US27610828 | 1928-05-08 | US1712688A | 1929-05-14 | NATHANIEL BROWN |
| 29 | Weed harrow | US74307024 | 1924-10-11 | US1594085A | 1926-07-27 | DAVID WILLS |
| 30 | Harrow | US37085420 | 1920-04-02 | US1385861A | 1921-07-26 | MCLACHLANE COMRIE JAMES YOUNG |
| 31 | Ditching-machine | US1317371D | US1317371A | 1919-09-30 | ||
| 32 | Plow. | US23578918 | 1918-05-21 | US1279588A | 1918-09-24 | RICHEFEU CHARLES EDOUARD |
| 33 | Road-drag. | US23386418 | 1918-05-11 | US1277661A | 1918-09-03 | STEVENS EDWARD L |
| 34 | Road-grading machine and ditcher. | US420715 | 1915-01-25 | US1170592A | 1916-02-08 | WILLIAMS WILLIAM R |
| 35 | Road-grading machine and ditcher. | US1914328716 | 1914-04-01 | US1129936A | 1915-03-02 | WILLIAMS WILLIAM R |
| 36 | Harrow for meadows. | US1911650425 | 1911-09-20 | US1035000A | 1912-08-06 | GRUENENWALD AUGUST; WIDDER VINCENZ |
| 37 | Ditcher and road-grader. | US1907375986 | 1907-05-27 | US879478A | 1908-02-18 | LARKIN WILLIAM |
| 38 | Weeder. | US1906332677 | 1906-08-30 | US876580A | 1908-01-14 | NEWLAND FRANCIS M |
| 39 | Road-grader. | US1904196403 | 1904-03-03 | US763650A | 1904-06-28 | WOODS HENRY |
| 40 | Harrow. | US1903138176 | 1903-01-07 | US739699A | 1903-09-22 | MCDONALD MICHAEL |
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