Soil cultivating implements

摘要

A soil cultivating implement has a ground-engaging packer roller 8 located behind soil working members and substantially oblong scrapers 11 co-operate with the external surface of the roller 8 between groups of soil-penetrating teeth 10. Each scraper 11 is carried by a foot 12 mounted at the lower end of an upright arm 13 and each arm 13 is connected to a common carrier 20 of circular cross-section by at least one U-bolt 18 and a pair of clamping shoes 21. The nuts 19 of the U-bolt can be tightened so that each arm 13 can occupy a normal working position (full lines) in which its scraper 11 just makes scraping contact with the cylinder 9 but not such firm contact that rapid wear will occur. The degree of tightness of the nuts 19 is sufficient reliably to maintain this position under normal working conditions but, should a jagged stone or the like become tightly jammed between the neighbouring groups of teeth 10 so that it will tend to damage the scraper 11 and/or its mounting, the U-bolt 18 and shoes 21 will slip angularly around the common carrier 20 to move the scraper 11 into a withdrawn position (broken lines) before any damage occurs.