| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 41 | Plow. | US1908445108 | 1908-07-24 | US901193A | 1908-10-13 | SAWATZKY THOMAS |
| 42 | Rotary disk plow. | US1903174993 | 1903-09-28 | US793240A | 1905-06-27 | SPALDING GEORGE |
| 43 | Cotton-thinner. | US1902091636 | 1902-01-28 | US718451A | 1903-01-13 | GREEN GEORGE L |
| 44 | Cultivator. | US1900037282 | 1900-11-21 | US674408A | 1901-05-21 | HARTIG WILLIAM F |
| 45 | Cyrenius a | US561227D | US561227A | 1896-06-02 | ||
| 46 | Cultivator | US502957D | US502957A | 1893-08-08 | ||
| 47 | Cultivator | US495365D | US495365A | 1893-04-11 | ||
| 48 | Cotton-chopper | US476628D | US476628A | 1892-06-07 | ||
| 49 | Listed-corn cultivator | US449527D | US449527A | 1891-03-31 | ||
| 50 | Harrow | US394514D | US394514A | 1888-12-11 | ||
| 51 | Harrow | US359988D | US359988A | 1887-03-22 | ||
| 52 | Cultivator | US352898D | US352898A | 1886-11-16 | ||
| 53 | Pulverizer | US313953D | US313953A | 1885-03-17 | ||
| 54 | Improvement in harrows | US201363D | US201363A | 1878-03-19 | ||
| 55 | Improvement | US148879D | US148879A | 1874-03-24 | ||
| 56 | wheeler | US82775D | US82775A | 1868-10-06 | ||
| 57 | High speed tillage system with discs and plow points | US443849 | 1982-11-22 | US4446924A | 1984-05-08 | William J. Dietrich, Sr. |
| A tillage system includes forward and rear sets of widely spaced discs and a set of plow points. The discs in the forward set are mounted at spaced intervals so as to leave alternate strips of worked and unworked soil of substantially equal width. Each disc of the rear set is mounted in a strip of soil left unworked by the forward set to complete the working of the top soil. The plow points are located in the furrows of one of the sets of discs (preferably the rear set) to permit some deep plowing. The working depths of the points and discs are independently adjustable. The system is designed for operation at high speed to provide complete coverage of the soil with minimal double working by the discs. It permits deeper penetration by the discs and a controlled amount of deeper plowing by the points while leaving a finished contour which is substantially free of ridges and furrows. | ||||||
| 58 | Soil cultivating implements | US758676 | 1977-01-12 | US4148363A | 1979-04-10 | Cornelis van der Lely |
| An implement assembly includes two elongated frame portions with respective coupling members that are linked to one another. Either frame portion can be leading or trailing and in a preferred arrangement, the leading frame portion has tined soil working members that work overlapping strips of top soil while the trailing frame portion has tined tools that work subsoil in non-overlapping paths. A common transmission can be fixed to either respective gear box that rotates the members and the tools. In either arrangment, the transmission is connected to the driving gears for both the members and the tools which can be rotated at different speeds from that of the members. A ground engaging wheel can be positioned at either side of the center of the assembly to bear on ground that is located between neighboring tools and/or members. The member can work paths of soil having different widths from those of the tools. The tools can be formed of horizontal carriers that are resiliently mounted in connectors with elastic elements that are located within a housing surrounding each carrier. | ||||||
| 59 | Vertically and laterally adjustable plow standard | US3647004D | 1969-06-12 | US3647004A | 1972-03-07 | FARMER ROBERT LESLIE EDWARD |
| A plough for use on weed-infested land comprising a semimounted frame, at least one ''''full-digger'''' share and at least one ''''semidigger'''' share located at different vertical levels in positions that are spaced apart lengthwise of the frame. Means are provided for both coarse and fine vertical adjustments of the shares.
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| 60 | Soil changing plow | US52079631 | 1931-03-07 | US1864262A | 1932-06-21 | STUMPF WALTER C |
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