Donald F Hornung, J Edson Mc Canse, Thomas A Klenke, Roger C McDonald: Grain Drill. CrustBuster Speed King, Stinson Mag & Fizzell, March 21, 1995: US05398771 (63 worldwide citation)

A grain drill is disclosed having a folding frame for parallel operation and a parallel link system that controls the tension to earth openers in order to produce relatively constant downward pressure for the openers. The grain drill includes a rotating tool bar for facilitating the adjustment of do ...

Jon E Kinzenbaw, Alan F Barry, Harry C Deckler: Agricultural implement with common mechanism for raising/lowering and rotating a lift frame about a vertical axis. Kinze Manufacturing, Emrich & Dithmar, September 13, 1994: US05346019 (51 worldwide citation)

An agricultural implement, such as a row crop planter, has a main carrier frame drawn by a tractor and including support wheels. Individual row units are mounted on a lift frame. The carrier frame includes a cornered lift post which is mounted for rotation about a vertical axis. A cornered sleeve or ...

Ryan Edward Clyde: Split-lift cultivator. Deere & Company, January 2, 1973: US3708019 (48 worldwide citation)

A row crop cultivator including an elongated toolbar adapted for attachment to a tractor three-point hitch and a plurality of cultivator rigs pivotally connected to the toolbar in spaced locations by upper and lower links. A pair of lift bars are pivotally mounted on the toolbar and extend beneath t ...

Alan F Barry, Harry C Deckler: Forward-folding, winged, implement frame. Kinze Manufacturing, Emrich & Dithmar, February 6, 1996: US05488996 (47 worldwide citation)

An improved frame for a drawn agricultural implement, such as a planter, includes a central main frame which is extensible. As the main frame extends, the wing sections fold forwardly. When the wing sections fold to a predetermined position, positioning links act to pull the main wheel set, which is ...

Alfred J Bailey, Ronald S Sargent: Seed and fertilizer drill with spring loaded coulters counter-mounted on vertically adjustable beam. Massey Ferguson Services, Robert L Farris, April 17, 1979: US04149475 (45 worldwide citation)

Seed drill has a row of coulters which are raised and lowered by a beam positioned above the coulters and connected to the coulters by spring assemblies. The beam is journalled for pivotal movement about its longitudinal axis and the spring assemblies are connected to the beam so that some exert rea ...

James I Van Blaricon, Eric Johnson, J Michael McClure, Dan J Obenland: Front folding no-till drill. Great Plains Manufacturing Incorporated, Hovey Williams Timmons & Collins, August 3, 1993: US05232054 (44 worldwide citation)

The front folding machine has a main fore-and-aft carrier frame provided with transport wheels that may be hydraulically actuated to raise and lower the frame simultaneously with the actuation of gauge wheels on a pair of transverse drill units connected to the rear of the carrier frame, thereby cau ...

Eugene H Schmidt, Lee F Nikkel: Positioning apparatus for drawn implement. A I L, Welsh & Katz, October 20, 1992: US05156219 (42 worldwide citation)

Apparatus for guiding a drawn agricultural implement of the type which has a transverse tool bar and a pull hitch. The apparatus controls the horizontal angular orientation of the tool bar relative to the pull hitch to guide the implement.

Fred P Moore Jr: Tillage implement having independent depth control mechanism. Allied Products Corporation, Lockwood Alex Fitzgibbon & Cummings, September 12, 1989: US04865132 (40 worldwide citation)

A tillage implement is provided which is of the type that has a plurality of working components that perform a multiple number of different soil treatment operations during a single trip across an agricultural field. One of these working components is a deep tillage component having a high draft req ...

Howard C Hadley: Hydraulic down pressure structure for an implement with multiple ground engaging tools. Deere & Company, November 19, 1991: US05065681 (36 worldwide citation)

An improved down pressure arrangement for an implement such as a multi-section grain drill having fixed-height section frames with corresponding gangs of opener assemblies. The opener assemblies of each gang are yieldingly biased downwardly by a spring and bracket structure operably connected to a r ...

Derek Sauder, Jeremy J Hodel: Variable pressure control system for dual acting actuators. Precision Planting, Thomas J Oppold, Larkin Hoffman Daly & Lindgren, October 8, 2013: US08550020 (35 worldwide citation)

A variable pressure control system for varying pressures in the fluid circuits of a dual acting actuator over a range of pressures. The variable pressure control system includes a controller that cooperates with pressure regulators for regulating the desired pressure in the fluid circuits.