Agricultural machine

Details Agricultural machine Agricultural machine

A - Human Necessities

01

B

342/17, 97/69

A01B 71/00 (2006.01) A01B 71/08 (2006.01) A01D 75/20 (2006.01) F16P 3/00 (2006.01)

Patent

CA 1133604

ABSTRACT An agricultural machine, for example a rotary harrow, has a roller 10. A pivotable protective member 13 extends over the harrow and the roller and is held in a raised position by a spring 22. If the protective member 13 is pressed down, for example by the weight of a person falling on to the machine, a projection 16 engages rods 10A of the roller 10, so preventing further rotation of the roller. At the same time, a linkage 18, 19, 20 causes an overload coupling 5 to be disengaged, interrupting the drive to working members 2 of the harrow. The construction reduces the risk of injury to people coming into contact with moving parts of the machine. In other embodiments remote sensors are used to detect the presence of people too close to the machine. Further embodiments provide for the drive to the moving parts to be interrupted if the driver leaves the controls.

341471

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