Did You Know...
...that while attempting to develop a super strong glue, 3M employee Spencer Silver accidentally developed a glue that was so weak it would barely hold two pieces of paper together? However, his colleague Art Fry needed the glue. Fry sang with his church choir and marked the pages of his hymnal with small scraps of paper that often fell out. He used Silver's glue to hold the papers in place. Today we call this invention Post-it Notes.
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| Number | Title | Issue Date |
| 8176993 | Ripper plough for soil tillage A ripper plough for soil tillage includes a body having an upper mounting attachment end, a lower soil engaging end, a leading edge, a trailing edge, and opposed sides. A ploughshare support extends outwardly from the body from the leading edge toward the trailing e... | 05/15/2012 |
| 8087470 | Tillage point In an embodiment, a tillage point includes a body having a top surface and a nose extending from the top surface. The tillage point also includes two wings each disposed on a lateral side of the body and extending laterally outward. In certain embodiments, a slope o... | 01/03/2012 |
| 8087471 | Agricultural implement with improved tillage point An agricultural implement includes a framework configured to be towed behind a vehicle, and a plurality of shanks mounted to the framework and configured to engage the soil. A tillage point is mounted on each shank. Each shank tillage point includes a body having a ... | 01/03/2012 |
| 7255179 | Cultivator sweep assembly A cultivator sweep assembly having a sweep adapted for releasable attachment to a shank of a mobile agricultural apparatus. The sweep assembly includes a sweep having a more narrow profile, and a coupling attached to a tapered end portion of the shank and disposed b... | 08/14/2007 |
| 7240741 | Knock-on sweep structure and tools therefor Sweep retaining structure includes a spring wire retainer with a base supported in a groove on the underside of the wedge support which mates with a stem portion of the sweep. The wedge support is apertured, and a central curved portion of the retainer passes throug... | 07/10/2007 |
| 7124836 | Knock-on sweep structure Sweep retaining structure includes a retainer having a contact end biased towards the sweep. The sweep includes two or more spaced end-receiving areas to accommodate changes in the mounted sweep position. In one embodiment, the retainer is a wire made of spring stee... | 10/24/2006 |
| 7104341 | Low disturbance deep tillage point Ripper point structure includes a nose with a tapered top that initiates lift and fracture of compacted soil layers. The tapered top with an included angle of about 100 degrees just forward of the parting wear shin creates a parting stress which increases until the ... | 09/12/2006 |
| 7070007 | Knock-on sweep structure Sweep retaining structure includes a retainer having a contact end biased towards the sweep. The sweep includes two or more spaced end-receiving areas to accommodate changes in the mounted sweep position. In one embodiment, the retainer is a wire made of spring stee... | 07/04/2006 |
| 6938700 | Knock-on sweep structure and tools therefor Sweep retaining structure includes a spring wire retainer with a base supported in a groove on the underside of the wedge support which mates with a stem portion of the sweep. The wedge support is apertured, and a central curved portion of the retainer passes throug... | 09/06/2005 |
| 6877568 | Tillage sweep A tillage sweep includes an elongated nose portion having forward cutting edges which are straight and diverge at an angle of approximately 45 degrees from a leading point. The top of the nose viewed from the side is straight and angles upwardly at an angle of appro... | 04/12/2005 |
| 6860336 | Subsoil fertilizer applicator A subsoil applicator has an upright shank provided with a leading soil-slicing edge and a pair of opposite sides. At the bottom of the shank, a pair of soil lifting wings are provided, presenting a pair of outermost wing edges that diverge rearwardly from the lowerm... | 03/01/2005 |
| 6702036 | Cultivator shovel A cultivator shovel for mounting on one of the shanks of a conventional agricultural cultivator. The shovel includes a shank mount in the form of a channel for receiving the shank therein. A shovel body is supported on a lower end of the shank mount and i... | 03/09/2004 |
| 6571884 | Quick change sweep retainer A novel solution for changing sweeps or knives on a cultivator or other soil working tool is the subject matter of the present invention. In today's farming world, where labor is at a premium and time is of the essence, a sole operator or farmer in prepar... | 06/03/2003 |
| 6508147 | Earth working sweep The present invention has several aspects to it, one of which is the provision of a chisel point which is straight and tapered from its thinnest part at the extreme front to a thicker part at the rear thereof for causing a sweep to wear longer than prior ... | 01/21/2003 |
| 6443237 | Minimum tillage ripper point with fin A deep tillage ripper point includes an aggressive long, narrow leading point portion with a top surface that forms a steep angle of approximately 40-50 degrees with the horizontal. An intermediate portion has a top surface and wings extending at a relati... | 09/03/2002 |
| 6422323 | Tillage tooth for use in an implement providing a smooth finish A tillage tooth for use in an implement which performs shallow tillage with tillage discs followed by chisel plows with winged points performing primary tillage in strips of untilled soil left by the forward discs. The points include wings mounted to eith... | 07/23/2002 |
| 6382115 | Plowshare particularly for seeding and eventual manuring in soil on continuous line Plowshare particularly for seeding and eventual manuring in soil in a continuous line of the type involving two equal and symmetrical opposite convergent wings with an apex having a substantial "V" shaped plan (31). Their ends are turned upwards (32) so t... | 05/07/2002 |
| 6357368 | Ground working paired row furrow opener A ground-engaging paired row furrow forming tool includes a tool body having fore and aft ends with an outer edge defined on each of two opposing sides of the tool body. A furrowing wing is located adjacent each of the opposing sides and protrudes from bo... | 03/19/2002 |
| 6332412 | Paired row furrow opener A ground-engaging paired row furrow forming tool includes a tool body having fore and aft ends with an outer edge defined on each of two opposing sides of the tool body. A furrowing wing is located adjacent each of the opposing sides and protrudes from bo... | 12/25/2001 |
| 6289996 | Securing device for knock-on earthworking tool A retainer is disclosed for preventing accidental release of a knock-on earthworking tool from an adaptor secured to the tine of an agricultural implement. The retainer, which is integrally formed from a single piece of metal, comprises an anchoring porti... | 09/18/2001 |
| 6119321 | Method of making an earth tilling sweep from disc scrap A method of making earth tilling sweeps from disc scrap including a process of cutting a plurality of circular discs side-by-side to form disc cut-outs as well as discs. Each cut-out is formed around an axis which is perpendicular to the plane of the shee... | 09/19/2000 |
| 5979568 | Agricultural sweep having reinforcing ridge An agricultural sweep has an upwardly extending stem adapted to be secured to a tine of an agricultural implement and a ground breaking member comprised of a pair of substantially planar wings diverging rearwardly from a tip. In order to prevent bending o... | 11/09/1999 |
| 5941318 | Cultivator sweep assembly A cultivator sweep secured to a sweep holder that is attached to a cultivator implement for shearing surface soil. The cultivator sweep includes a body member having a front nose portion, a rear portion and a pair of laterally outwardly extending wing mem... | 08/24/1999 |
| 5881821 | Fin sweep assembly and method of manufacture A tillage sweep assembly includes a base sweep with a central fore-and-aft slot. A support strap or stem includes a corresponding fore-and-aft extending protrusion which mates with the slot. A filet weld connects the top of the base sweep to the support s... | 03/16/1999 |
| 5730228 | Tool for a row cultivator, having a leading blade and cutting blades A row cultivator (10) includes a row following system (12) coupled to a toolbar (13) employing frame members (17) and (18) constrained to remain parallel by a cross member (21). Coulter wheels (30) and (31) secured to the frame members (17) and (18) are n... | 03/24/1998 |
| 5711378 | Knock-on earth working tool securement assembly A tapered adaptor (10) disposed at a free, leading end of a cultivator shank (S) is arranged to co-operate with a blocking member (27). The blocking member (27) defines forwardly facing abutment surfaces (28, 29). They engage a rear edge portion (54) of t... | 01/27/1998 |
| 5558165 | Agricultural sweep and mounting Knock-on sweep mounting structure includes a combination of first and second tapers, and mating notch structure in the sweep connecting portion and in the mounting structure on the shank, to provide easy installation and prevent sweep loss. The notch stru... | 09/24/1996 |
| 5540288 | Primary tillage unit with reduced disturbance of surface soil and residue A conservation tillage unit for use in primary tillage includes a rolling coulter followed by a chisel plow having a narrow shank and a soil working unit mounted to the bottom of the shank. The working unit includes a point and a delta wing mounted behind... | 07/30/1996 |
| 5531277 | Bent wing sweep A cultivator sweep includes a body with a forward point and wings diverging outwardly in the rearward direction. In one embodiment, a row side sweep includes a row side wing angled upwardly from the horizontal at an angle of approximately 27 degrees, and ... | 07/02/1996 |
| 5499686 | Deep tillage winged sweep A long wearing deep tillage sweep includes a central point member having a leading tip and attached to a shank at an angle to the horizontal of approximately 30 degrees. A pair of wings having the shape of a parallelogram are fixed to the lower, forward p... | 03/19/1996 |
| 5495814 | Sub-zone tiller with offset fertilizer placement A seed furrow cutting knife adapted for cutting a seed furrow, fluffing the furrow sidewalls to avoid soil compaction, and for offset placement of fertilizer in the furrow is provided. The furrow cutting knife has associated side wings for fluffing sidewa... | 03/05/1996 |
| 5465796 | Shank assembly with knock-on sweep An agricultural shank assembly includes an edge-bent standard having an integral tool-receiving end which is tapered to provide a self-locking fit for a matching sweep. A non-corroding plastic pin inserted through a hole in the sweep and through an elonga... | 11/14/1995 |
| 5456323 | Agricultural sweep and method of manufacture An agricultural sweep for being attached to a tractor for pulling the agricultural sweep across the ground. The agricultural sweep incudes a ground engaging portion having a cutting edge for cutting through the ground as the sweep is pulled across the gro... | 10/10/1995 |
| 5437337 | Tillage unit with reduced disturbance of surface residue and soil A conservation tillage unit includes a coulter and a plow having a shank, a point and a pair of wings mounted slightly forwardly of the shank. The unit fractures the soil at ground speeds up to seven miles per hour without throwing the surface soil and re... | 08/01/1995 |
| 5415236 | Subsoiler having rearwardly disposed soil fracturing structure The subsoiler has shank assemblies which are designed to cut a thin, clean slice in the soil without frontal upheaval forces that would cause eruption of the soil in a turbulent manner ahead of the shank line. The soil lifting components at the bottom of ... | 05/16/1995 |
| 5398770 | Cultivator A chisel cultivator for post-planting cultivation. The cultivator includes a main frame. A chisel member has one end portion coupled to the frame and a second end portion spaced from the first end portion along a longitudinal axis of the chisel member for... | 03/21/1995 |
| 5390745 | Cultivator with sweep and sifting assemblies A cultivator for post-planting cultivation. The cultivator includes a main frame. A chisel member has one end portion coupled to the frame and a second end portion spaced from the first end portion along a longitudinal axis of the chisel member for cultiv... | 02/21/1995 |
| 5373904 | Cultivator blade A blade construction for a cultivator blade or a cultivator sweep, wherein the blade is adapted to sever plants from the ground by digging up the roots, to permit collection of the plants and subsequent separation of the fruit contained thereon. The blade... | 12/20/1994 |
| 5259461 | Cultivator sweep A cultivator sweep having a substantially constant cross-sectional thickness and configured with a generally triangular head portion including a pair of side edges diverging symmetrically rearward from a nose region. Each of the side edges is provided wit... | 11/09/1993 |
| 5176209 | Cultivator sweep A cultivator sweep or shovel includes a rigid generally arrowhead shaped body having a central mounting flange enabling attachment to a support shank or tine. The sweep has rearwardly diverging primary cutting edges and one or more outwardly and forwardly... | 01/05/1993 |
