| 摘要 |
An improved packer apparatus in which the means of applying pressure downwards on the packer wheel, a coil spring in the example, is at the point of pivotal attachment of the wheel mounting bracket to the cultivator shank. This allows the packer assembly to be very compact and have few moving parts, and in consequence it causes no interference to the shank when an obstruction is struck, is in less danger of breakage, does not exert upwards pressure on the shank, and has greater freedom of movement than earlier packer assemblies. The described example can also allow for varying the packing pressure by reversing the spring or connecting the wheel mounting bracket through a different hole in the bracket, or both. A neoprene bushing ensures trouble-free, grease-free maintenance of the one only moving part in the attachment/pivot assembly.
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