Class 172/462 - Plural tools, individually spring biased down, lifted as unit

Subclass of Class 172 - Earth working
Definition: Apparatus comprising a plurality of earth working elements
No. of patents: 24
Last issue date: 12/18/2007

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Number	Title	Issue Date
7308859	Suspension system for planting unit A planting unit is provided having a seed trench opener that forms a seed trench in a ground surface as the planting unit travels along the ground. A depth regulating member is provided that has a predetermined vertical position relative to the opener. The depth reg...	12/18/2007
7111566	Seed planter including vertical positioner with locking member A seed planting assembly is provided having a plurality of planting units supported by a tool bar, each of which being operable to form a seed trench in soil, plant seeds in the seed trench, and close the seed trench. Each planting assembly is supported by the tool ...	09/26/2006
7032527	Vertical positioner for seed planter having integral locking mechanism A seed planting assembly is provided having a plurality of planting units supported by a tool bar, each of which being operable to form a seed trench in soil, plant seeds in the seed trench, and close the seed trench. Each planting assembly is supported by the tool ...	04/25/2006
6732812	Staggered frame element with overlap A transverse rank particularly useful with implement split frame construction includes first and second transversely extending tubular members welded to the fore-and-aft tubes on first and second halves of the frame. The locations of the first and second tubular mem...	05/11/2004
6505688	Soil conditioning implement A seed bed packer including a frame, a plurality of wheels connected to the frame, and a soil packing element. The packer also includes a spring shank for transferring weight from the frame to the soil packing element. The spring shank includes a first le...	01/14/2003
5590721	Conservation tillage tool A conservation tillage tool, including a main frame and a rear frame pivotally mounted on the main frame disposed to support a number of soil working implements in sequence. The main frame is supported by ground wheels attached to the rear section of the ...	01/07/1997
5555825	Direct drill stump jump seeder A direct drill seeding unit comprising a coulter wheel (5), a pair of depth control wheels (7) and a splitter (9) where the main components of the seeding unit are pivoted on an elongate arm (1) which is connected to a common or main frame (3). The pivota...	09/17/1996
5181573	Seed bed packer implement A drawbar packer having an adjustable bias assembly which transfers implement weight between the wheels and the coil packers. Tension on extension springs is adjustable so that sufficient weight is transferred from the wheels to the coil packers such that...	01/26/1993
5163518	Down force adjustment and lift for an opener supported from a frame by lift arms A plurality of parallel arm type openers are mounted on a frame tube, and a rockshaft is supported directly below the tube. Adjacent each of the openers, a lever arm is fixed for rotation with the rockshaft and, upon rotation of the rockshaft in a first d...	11/17/1992
5042589	Multi-tine cultivator frame suspension and adjustment mechanism The invention disclosed relates to a mechanism for adjusting the level, tine working depth, and tine working angle of a framework supporting a multiplicity of cultivator tines. The framework is cantilevered from and behind a boom drawn on wheels, and incl...	08/27/1991
5007485	Earth crust breaker An earth crust breaker drawn by a tool bar on a tractor is provided and consists of an elongated U-shaped frame having an angularly upwardly extending front end attached to the bottom of a vertical member of the tool bar. A post extends vertically from ea...	04/16/1991
4867247	Bedding plow A bedding plow providing a plurality of disks as plowing members each independently supported by a rearwardly located bearing supported by a trailing arm, which is supported, in turn, by a pivotal connection perpendicular to a fore to aft alignment of the...	09/19/1989
4865132	Tillage implement having independent depth control mechanism 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 d...	09/12/1989
4632192	Multiple-unit apparatus for lifting sod A sod cutting unit supports a vibrating sod-cutting blade on a pivot under a platform and driving and control mechanism above the platform, while drawing the platform across a field on a support which allows the platform to pivot around a horizontal axis ...	12/30/1986
4466364	Planter attachment The invention relates to agricultural implements for planting. Increased efficiency of planting in general and incorporating fertilizer in particular in no-till situations is achieved by frame, disk and knife assemblies (14, 15, 16) mounting a disk (44) i...	08/21/1984
4450779	Seed drills A seed drill comprising a frame, a series of coulters mounted on the frame at positions which are spaced apart in a transverse direction relative to the direction of operative forward motion of the drill, and actuating means comprising a beam that extends...	05/29/1984
4448259	Rubber spring for furrow opener A pre-stressed columnar rubber spring interposed between the pressure beam and pivoted draw bar tube of a no-till seed drill deflects under load in one direction only and the force causing increased spring deflection in the principle operational range inc...	05/15/1984
4311104	Press grain drill A press grain drill includes a plurality of opener units mounted on an elongated tow tube and including a plurality of elongated, pivotably coupled elements forming a pair of parallelograms which support a self-penetrating shovel and a press wheel respect...	01/19/1982
4291638	Agricultural implements The present invention provides in an agricultural ground treating device particularly but not exclusively a seed drill arranged to be towed over the ground and having a plurality of ground engaging implements, means for causing all of the implements to en...	09/29/1981
4275670	Seed drill mounting arrangement Seed drill (FIG. 1) having furrow openers 10 and accompanying press wheels 12 pivotally arranged on frame 1 by mounting means 3. A spring 18 is interposed between the frame and the furrow openers - press wheels. The bias of the spring can be adjusted by o...	06/30/1981
4155316	Coulter beam mounting assembly including articulate joint means Seed drill has a row of coulters which are raised and lowered by a beam extending along and above the row of coulters and connected to the coulters by spring assemblies. The beam is raised and lowered relative to the frame of the drill by two rams to actu...	05/22/1979
4149475	Seed and fertilizer drill with spring loaded coulters counter-mounted on vertically adjustable beam 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...	04/17/1979
4131162	Earth working apparatus An earth working apparatus comprising a main frame having a hitch for detachably connecting the apparatus to a prime mover, a first ground working implement mounted on the main frame, a pair of support arms operatively connected at forwardly disposed ends...	12/26/1978
4083412	Agricultural soil-working apparatus An agricultural seed-drill comprises a frame and pivotally mounted drag bar carrying a coulter disc. An ovoid rubber spring is located between the drag bar and a member, such as a moving beam or bell crank lever, associated with the frame to apply pressur...	04/11/1978

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Class 172/462 - Plural tools, individually spring biased down, lifted as unit