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| Number | Title | Issue Date |
| 4313504 | Tandem ripper assembly A ripper assembly (10) includes at least two ripper members (16,18) mounted in tandem relationship and adapted for connection to a vehicle (14). A linkage assembly (20) interconnects the ripper members. A hydraulic cylinder (44) is operable to raise and l... | 02/02/1982 |
| 4113028 | Lift for dragged implement A lift device is mounted on a wheeled implement such as a disc harrow which has retractable wheels for transport. The lift device includes a pair of arms mounted on a horizontal pivot bar which is rotated by activation of the mechanism for lowering the wh... | 09/12/1978 |
