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Felix Hoffmann, a German chemist, was searching for something to relieve his father's arthritis. In doing so, he "rediscovered" acetylsalicylic acid and in 1900, patented a stable process for developing it. Hence, we have aspirin.
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| Number | Title | Issue Date |
| 7284621 | Ground levelling apparatus Tractor towed ground levelling apparatus includes an elongate cutting edge mounted on a cylindrical steel beam. The beam carries road wheels and is connected to a foldable drawbar hitched to the plough arms of the tractor. Alternatively, the drawbar may be connected... | 10/23/2007 |
| 7131500 | Sports surface reconditioner A device for reconditioning a damaged sports surface. The device includes at least one rotatably driven shaft with two ends, one of which is connected to a frame, the other end being disposed towards the surface. The driven shaft is disposed orthogonal relative to t... | 11/07/2006 |
| 7020923 | Fastener removal tool A body shop tool includes at least four fold out tool elements pivotally mounted at one end of a trough shaped holder and a fastener pry tool pivotally mounted at the opposite end of the through shaped holder wherein the pry tool is configured to fit over, retain an... | 04/04/2006 |
| 6763895 | Cultivating apparatus Soil cultivating apparatus which includes at least one rotary cutting assembly having a plurality of earth working implements (25, 26) spaced around a peripheral region of a rotary support member (18) mounted for rotation about a central upright axis o... | 07/20/2004 |
| 6564878 | Vertical rotating tiller A rotatable tiller apparatus for use in mixing soils in situ, including: (a) a vertically oriented rotatable drive shaft, connected to and driven by a motor external to the apparatus; (b) a drive assembly connected to the drive shaft; (c) at least two ver... | 05/20/2003 |
| 5875573 | Vertical spin ditcher with 3 point hitch A ditch digger having a horizontal cutting disc with spaced and angled replaceable cutting blades housed within a circular frame and surrounded in one semicircle by a dirt blocking chain barrier and by a solid guard barrier in the other semicircle. The di... | 03/02/1999 |
| 5667019 | Soil treating device The invention relates to a soil treating device comprising at least one working element rotatably driven by a rotation shaft and a frame accommodating the working element and displaceable practically parallel to the ground, characterized in that the rotat... | 09/16/1997 |
| 5069294 | Stub-shaft powered spinning tiller A powered spinning tiller with a box beam extending transversely of the direction of travel includes a plurality of spinners each consisting of a prong holder and a drive gear disposed rotatably on bearings side by side, adjacent prong holders being drive... | 12/03/1991 |
| 4889190 | Soil working machine The soil working machine, especially a circular spike harrow, includes a support housing (2) which extends perpendicular to the running direction (1), several soil working tools (3) disposed next to one another at the support housing (2), tool supports (4... | 12/26/1989 |
| 4887372 | Shallow angle furrow refurbishing method and apparatus Shallow angle furrows between crop beds are reshaped and cleaned in one pass using a tractor-towed implement having angularly even-spaced cutter blades mounted in tiers on drums for rotation about generally vertical axes, perpendicular to the furrow walls... | 12/19/1989 |
| 4736802 | Agricultural implement with orbiting knives An agricultural implement with one or more pairs of knives which are eccentrically mounted on rotary knife holders and extend from the underside of a housing which can be pulled or pushed by hand or by an engine. The knives of each pair orbit in the same ... | 04/12/1988 |
| 4726427 | Soil loosening device The soil loosening device has at least one, preferably two journals protruding downwardly from a supporting body, which are driven to a pivotal motion along a limited angle. Tine-like soil loosening tool members in bifurcate arrangement, to be driven alon... | 02/23/1988 |
| 4552223 | Soil cultivating implements A soil cultivating implement comprises a hollow portion which rotatably supports a row of substantially vertical shafts, each shaft carrying a corresponding soil working member at its lower end. Each soil working member comprises a tine holder having two ... | 11/12/1985 |
| 4552079 | Machine for planting seeds A machine for planting seeds includes a rotary soil lifting device which lifts broken-up soil, a tamping roller which tamps the remaining broken-up soil, an arrangement for placing seeds onto the upper surface of the tamped layer of the ground, and an arr... | 11/12/1985 |
| 4520874 | Agricultural machine An agricultural machine with a frame on which tool rotors are mounted on upright shafts in a row extending across the direction in which the machine travels. The rotors are driven by a horizontal driveshaft that is segmented and interlocked by couplings. ... | 06/04/1985 |
| 4508179 | Soil cultivating implements In a soil cultivating implement of the kind which comprises a row of rotary power-driven soil working members which extend substantially horizontally and perpendicular to the implement's intended direction of operative travel, the cost of making and assem... | 04/02/1985 |
| 4470467 | Vertical axis earthworking implement A vertical multi-axis cutter, comprising a plurality of knives mounted on axes of rotation that are vertical or somewhat inclined relative to the vertical, wherein said knives are arranged so that the cutting edge meets the circular path under an angle &#... | 09/11/1984 |
| 4465143 | Rotary harrows A rotary harrow has an elongated hollow frame portion that extends transverse to the direction of travel. The frame portion comprises three spaced apart sheet walls that define an upper chamber and a lower chamber. Driving means, including meshed pinion g... | 08/14/1984 |
| 4436161 | Soil cultivating implements A soil cultivating implement having an elongated frame portion which extends substantially horizontally perpendicular to the direction of travel of the implement mounts a side plate at each lateral end. The frame portion carries a row of rotary tined soil... | 03/13/1984 |
| 4423786 | Soil cultivating machines A soil cultivating machine attachment has a row of single tined rotary members. Each rotary member includes a shaft journalled in a hollow box-like frame portion and a lower tine has a holder bolted to the lower end of the shaft. The tine has an operative... | 01/03/1984 |
| 4354557 | Soil cultivating implement A cultivating implement has an elongated frame portion that mounts a row of rotors that rotate about upwardly extending axes. At the lateral sides of the frame portion, screening plates are positioned to arrest the lateral displacement of soil being worke... | 10/19/1982 |
| 4340118 | Soil cultivating implements A cultivating implement has a row of soil working members mounted along the length of an elongated portion of the implement frame. The members are rotatable about upwardly extending shafts that are geared to an overlying common driving shaft and an imput ... | 07/20/1982 |
| 4335789 | Soil cultivating implements A cultivating implement has an elongated frame portion that mounts a row of soil working members, each of which rotates about an upwardly extending shaft and mounts a lower tine or tines. The lower shaft end preferably is a flattened horizontal part and c... | 06/22/1982 |
| 4335790 | Soil cultivating implements A soil cultivating implement has tined, rotatable soil working implements mounted along the length of an elongated transverse frame portion that has carriers pivoted to the front of the frame by at least one pivot that defines a single axis. The rear ends... | 06/22/1982 |
| 4324123 | Soil cultivating implements A cultivating implement has an elongated frame portion that mounts a row of rotors, each rotor having an upwardly extending shaft and a lower tine. The lower shaft end is a flattened horizontal part with a threaded stub shaft that extends through a centra... | 04/13/1982 |
| 4301871 | Soil cultivating machines A cultivating machine has soil working members journalled in a hollow frame portion. Each member includes a harrow with supports and downwardly extending strips attached to the supports. The lower strip ends each mount a curved blade that is pointed in th... | 11/24/1981 |
| 4300639 | Soil cultivating machines A soil cultivating machine has a row of cultivating members which are mechanically driven and rotatable about upwardly extending axes positioned on a transverse row. An elongated, transverse hollow frame portion supports at least twenty shafts of the cult... | 11/17/1981 |
| 4299291 | Power harrow with vertical rotating rotors A power harrow has a frame that is normally substantially horizontal and at least one rotor. A rotatable shaft is journalled near one end in a bearing secured to the frame. The rotor is in driven connection with the other end of the shaft, and is rotated ... | 11/10/1981 |
| 4219086 | Soil cultivating implements An implement has rotatable soil working members that are driven to rotate about upwardly extending axes. The members each have a downwardly extending carrier that is releaseably connected to a driven shaft, and spaced apart soil working elements mounted a... | 08/26/1980 |
| 4210209 | Agricultural implement An implement is connectable to the lifting hitch of a tractor and at least one rotary tool is driven to rotate about an upwardly extending axis. The tool or a trestle frame has an overload connection that allows the tool or frame to pivot to an inoperativ... | 07/01/1980 |
| 4207948 | Soil cultivating implements A soil cultivating implement has a row of soil working members that are driven to rotate about upwardly extending axes. Each member includes a tine carrier and tines either in pairs or singly, are journalled for free rotation about further upwardly extend... | 06/17/1980 |
| 4200156 | Soil cultivating implements A cultivating implement has a row of rotors that are driven to rotate about upwardly extending axes and an elongated roller with pins that project obliquely rearwardly, considering the normal direction of rotation of the roller. The roller is mounted on a... | 04/29/1980 |
| 4199031 | Soil cultivating machines A cultivating machine has a row of soil working members rotatable about upwardly extending axes and each member includes a carrier from which tools detachably depend. The lower tool ends have blades that are adjustable and detachable from the remainder of... | 04/22/1980 |
| 4187915 | Soil cultivating implements An implement mounts a row of rotatable members, having resilient tines, that are rotatable about upwardly extending shafts. The members are driven to rotate intermittently by eccentric mechanisms that reciprocate connectors back and forth, the connectors ... | 02/12/1980 |
| 4183231 | Rotary harrows A safety coupling between a driving coupling and a driven coupling has a shear pin operative connection that shears upon overload, allowing relative movement between the two couplings. The shear pin is urged to establish a second operative connection afte... | 01/15/1980 |
| 4183412 | Rotary harrows A rotary harrow has soil working members that are driven to rotate on upwardly extending shafts. Each member has a horizontal central support, and an arm pivoted at each opposite end of the central support. A tine is fastened to the outer end of each arm ... | 01/15/1980 |
| 4178997 | Implements with side screening plates A harrow has an elongated frame beam supporting a row of rotatable soil-working members mounted side-by-side on upwardly extending shafts. The frame beam and row of soil-working members extend transverse to the direction of travel of the harrow. At each l... | 12/18/1979 |
| 4175623 | Soil cultivating implements A cultivator has driven soil working members mounted on corresponding upwardly extending shafts and each member includes a support with a hub secured near the lower end of a respective shaft. The support is formed from flat sheet material which define res... | 11/27/1979 |
| 4175624 | Soil cultivating implement A rotary harrow has a row of soil working members that are driven to rotate about upwardly extending axes and work overlapping paths. Each member has spaced apart downwardly extending tines having lower soil working portions. A flat tool is fitted on each... | 11/27/1979 |
| 4174002 | Soil cultivating machines A cultivating machine has soil working members that are driven to rotate about corresponding upwardly extending shafts. Each member includes a generally horizontal support and a tine or tine-shaped portion at each outer end thereof. The lower straight par... | 11/13/1979 |
