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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 |
| 7328567 | Wheel rake A wheel rake including an adjustment mechanism for adjusting wheel beam angle for more aggressive or less aggressive raking action. ... | 02/12/2008 |
| 7165386 | Vertically folding rake A vertically folding rake assembly is configured for forming a windrow of cut agricultural crop material. The rake includes a trolley; a pair of rake arm suspension supports interconnected with the trolley and movable in a vertical plane between a raised position an... | 01/23/2007 |
| 7134262 | Method of and device for drying grass surfaces Drying of wet ground surfaces provided with stalks includes removing droplets from stalks with comb-shaped slitted, cubical or squared projections provided on an underside of a broad plank, and guiding the removed droplets along the slitted, cubical or squared proje... | 11/14/2006 |
| 7100351 | Foldable hay rake A foldable hay rake has two rake arms comprised of two or more arm members with rake wheels thereon. The hay rake arms are pivotally secured together to a pivot assembly to pivot in a vertical plane. The pivot assembly is pivotally secured for pivoting in a horizont... | 09/05/2006 |
| 7076938 | Pivoting innermost rake wheel system for varying windrow width A bifold rake for agricultural crop material includes a rear wheeled trolley and a forwardly extending drawbar adapted for interconnection with a tow vehicle such as a tractor. A pair of rake arms are pivotably interconnected to opposite sides of the trolley, and ea... | 07/18/2006 |
| 7007450 | Internal windrow width adjustment system for a V-rake A bifold rake for agricultural crop material includes a rear wheeled trolley and a forwardly extending drawbar adapted for interconnection with a tow vehicle such as a tractor. A pair of rake arms are pivotably interconnected to opposite sides of the trolley, and ea... | 03/07/2006 |
| 6978592 | Rake wheel A rake wheel includes a hub and a plurality of tines connected to the hub and extending outwardly therefrom to an annular rim concentric with the hub. Each tine is journaled through a first plurality of apertures formed in the rim and projects outwardly from the rim... | 12/27/2005 |
| 6971225 | Control arrangement for a pull-type windrow merger A control arrangement is configured to remotely control operation of a windrow merger pulled by a tow vehicle. The windrow merger includes a plurality of functional systems or assemblies configured to selectively collect and discharge crop material, and that can be ... | 12/06/2005 |
| 6945024 | Internal opening and closing system for v-rakes A bifold rake includes a rear trolley to which a pair of rake arms are pivotably mounted, and a drawbar extending forwardly from the rear trolley. An opening and closing mechanism includes front and rear operating arms located on each side of the drawbar and pivotab... | 09/20/2005 |
| 6892520 | Foldable hay rake A foldable hay rake has two rake arms comprised of two or more arm members with rake wheels thereon. The hay rake arms are pivotally secured together to a pivot assembly to pivot in a vertical plane. The pivot assembly is pivotally secured for pivoting in a horizont... | 05/17/2005 |
| 6543212 | Rake wheel construction for an agricultural rake A rake wheel construction for an agricultural hay rake includes a central hub and a series of rake fingers that extend outwardly from the central hub. A peripheral rim is located outwardly of the central hub, and each rake finger is engaged with the rim a... | 04/08/2003 |
| 6539696 | Tension spring flotation agricultural rakes An agricultural rake basket flotation system that employs tension springs to support a portion of the weight of the rake basket, toward the lateral ends thereof, thus allowing for a more sensitive and complete response to encounters with obstacles and irr... | 04/01/2003 |
| 6467249 | Hay making machine comprising at least one raking wheel articulated to a carrying arm A hay making machine, particularly a windrower for plant matter, comprising a structure carrying at least one raking wheel. The latter is connected to the end of a carrying arm in such a way as to be able to pivot about a first axis and a second axis. The... | 10/22/2002 |
| 6330784 | Rake assembly A rake assembly for attachment to a tractor includes a mounting assembly for mounting to a tractor and an arm having a first end, a second end and a middle portion. The arm is fixedly coupled to the mounting assembly. A securing mechanism secures the arm ... | 12/18/2001 |
| 6330785 | Wheel rake spring assembly A lifting force is applied to a wheel rake arm through a spring assembly wherein a coil spring is placed in compression rather than tension. In the preferred embodiment a rod is connected at one end to a rake wheel arm and the free end of the rod extends ... | 12/18/2001 |
| 6314710 | V-rake with windrow width adjustment A V-rake includes a drawbar assembly adapted for connection to a tow vehicle, in combination with a transverse cross-member connected to the drawbar assembly. Wheels are mounted to the cross-member, to form a trolley for conveying the V-rake. A rake arm i... | 11/13/2001 |
| 6220008 | Wheel rake spring assembly A lifting force is applied to a wheel rake arm through a spring assembly wherein a coil spring is placed in compression rather than tension. In the preferred embodiment a rod is connected at one end to a rake wheel arm and the free end of the rod extends ... | 04/24/2001 |
| 5899055 | Pull type rake A "V" type pull rake includes a rigid primary frame to which rake arms are pivoted for movement about vertical and horizontal axes. The rake arms include at their outer ends upstanding posts to which control assemblies are connected and extend over the ra... | 05/04/1999 |
| 4689941 | Pulled dethatching unit A pulled dethatching unit includes a frame having a tow bar extending forwardly for attachment to a draw bar of a pulling vehicle. The rear end of the frame has an arm pivotally attached to each side with each arm having a wheel rotatably mounted thereon.... | 09/01/1987 |
| 4547984 | Brush uprooting attachment An attachment for a front lift of a farm tractor comprises an elongated tool bar extending forward and supporting at its far end a large claw having three spaced downwardly curved, sharpened tines. The end of the tool bar nearest the lift is welded both d... | 10/22/1985 |
| 4318631 | Texturing broom apparatus for roadway pavements A texturing broom apparatus for surface grooving freshly laid uncured concrete pavement comprising a traveling horizontal endless conveyor belt having a texturing broom, provided with a row of straight spring steel tines projecting from a base board in sp... | 03/09/1982 |
| 4317327 | Pushed dethatching unit A dethatching unit is mounted for attachment to the front end of a self-propelled lawn mower, for example, so that the dethatching unit is pushed by the lawn mower and thatches the ground prior to mowing thereof. The dethatching unit includes a frame havi... | 03/02/1982 |
| 4249367 | Brush windrower A brush windrower for accumulating brush and trimmings from under orchard trees, in which a main frame extends rearwardly from a tractor which is driven between the tree rows, and a rake bar extends outwardly from the main frame and passes underneath the ... | 02/10/1981 |
| 4146096 | Lawn rake and cultivator A lawn rake and cultivator comprising a frame having multiple rows of depending tines, each of which has a forward end which inclines forwardly and upwardly the majority of the time during forward travel, for pitching thatch forwardly and upwardly out of ... | 03/27/1979 |
