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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 |
| 7954572 | Steering system for tracked vehicles A steering system for tracked vehicles having two brake circuits which is activated after a failure of the primary steering mechanism. The steering system includes a steering switch (L) that can be controlled by a steering axle which, in the event of primary steerin... | 06/07/2011 |
| 7814999 | Hydraulic traction system for vehicles A hydraulic traction system for vehicles is described. The system comprises a hydraulic vane motor mounted at each wheel of the vehicle, and equal number of identical hydraulic vane motors operated as engine driven pumps, and a control system for regulating the flow... | 10/19/2010 |
| 7578361 | Differential steering assist system for utility vehicle A differential steering assist system is provided for an off road utility vehicle with a pair of steerable front wheels and at least one pair of driven left and right rear wheels. The system uses a steering position sensor and wheel speed sensors that sense the whee... | 08/25/2009 |
| 7431123 | Vehicle improved in steering A vehicle including an integral transaxle apparatus with axles, a driving hydrostatic transmission (HST), a steering HST, and a differential unit. Driving operating means for slanting operation of a first movable swash plate of the variable displacement driving hydr... | 10/07/2008 |
| 7341121 | Vehicle with improved turning A vehicle is disclosed having a reduced turning radius comprising a directional wheel assembly for turning the vehicle and a drive wheel assembly for driving the vehicle. The drive wheel assembly has a first and a second drive wheel independently driven by a first a... | 03/11/2008 |
| 7337869 | Hydraulic hybrid vehicle with integrated hydraulic drive module and four-wheel-drive, and method of operation thereof A vehicle includes an integrated drive module coupled to an axle thereof. The module includes a hydraulic motor configured to provide motive power at an output shaft, and a differential for distributing the motive power to right and left portions of the axle. The hy... | 03/04/2008 |
| 7331411 | Hydraulic traction system for vehicles A hydraulic traction system for vehicles is described. The system comprises a hydraulic vane motor mounted at each wheel of the vehicle, and equal number of identical hydraulic vane motors operated as engine driven pumps, and a control system for regulating the flow... | 02/19/2008 |
| 7331412 | Vehicle having twin transmissions for driving respective wheels A vehicle comprises a vehicle frame, a prime mover mounted on the vehicle frame, a laterally turnable wheel disposed at one side of the vehicle frame, a pair of drive wheels disposed at the other side of the vehicle frame, a steering operation device, a traveling op... | 02/19/2008 |
| 7325636 | Front-wheel drive steering compensation method and system A method of controlling the speed of a right front wheel and a left front wheel on a work machine includes receiving a speed command based at least partially on an operator input and monitoring at least one wheel steering angle of at least one front wheel. A first f... | 02/05/2008 |
| 7316287 | Hydraulic pump unit, hydraulic pump set, and working vehicle There is provided a working vehicle having first and second hydraulic pump units operatively driven by a driving source and arranged away to each other in a width direction of the vehicle. In the working vehicle, each of the first and second hydraulic pump units inc... | 01/08/2008 |
| 7294082 | Powertrain arrangement for a skid-steer vehicle A powertrain arrangement for selectively operating a vehicle in a skid-steer configuration is provided. The arrangement includes an engine coupled to a differential. A first torque transfer mechanism is coupled to a coupling mechanism and arranged to drive a first s... | 11/13/2007 |
| 7284626 | Patient support apparatus with powered wheel A patient support apparatus has a lower frame and an upper supported above the lower frame and movable relative to the lower frame. A plurality of casters are coupled to the lower frame. A wheel is movable relative to the lower frame between a lowered position engag... | 10/23/2007 |
| 7281601 | Fluid driven differential A fluid driven differential, having a fluid filled housing, an input shaft, and a pair of output shafts. The input shaft is attached to an automobile driveshaft outside of the housing and to a propeller inside the housing. The output shafts are each attached to an a... | 10/16/2007 |
| 7264068 | Steering control system for a skid steer vehicle A skid steer vehicle has a steering controller that monitors the speeds of the left and right wheels and steers those wheels in directions that are calculated to reduce, eliminate or minimize wheel skidding with respect to the ground while the vehicle is turning. | 09/04/2007 |
| 7261178 | Four wheel-drive vehicle An articulate vehicle comprises a first frame disposed at one of front and rear portions of the vehicle and a second frame disposed at the other of front and rear portions of the vehicle. The first frame supports a first transaxle apparatus supporting a first axle. ... | 08/28/2007 |
| 7246670 | Work vehicle with hydrostatic steering system A work vehicle with a hydrostatic steering system is disclosed which is capable of performing optimum control of the absorption torque of a hydraulic pump according to running load; capable of preferentially ensuring turning performance and implement speed when runn... | 07/24/2007 |
| 7237629 | Zero-turn radius vehicle with steerable front wheels The present invention relates to a zero turning radius vehicle having at least one steerable front wheel and a multistage steering input system separately capable of steering the at least one front wheel and selectively driving the drive wheels. A front wheel steeri... | 07/03/2007 |
| 7216579 | Variable flow control devices, related applications, and related methods Devices for adjustably controlling a flow of fluid through a common passage and through first and second auxiliary passages are disclosed. The flow control devices may be used for controlling the steering of a vehicle having independently controlled driven structure... | 05/15/2007 |
| 7207581 | Adjustable hydrostatic control system An adjustable hydrostatic control system that adjusts in length to locate mutual neutral locations while transmitting the necessary torque through mating sliding spines. ... | 04/24/2007 |
| 7182353 | Turn brake for multi-track vehicles A turn brake includes a cylinder assembly coupled to a conventional front-wheel steering system of a multi-track vehicle. The cylinder assembly generates fluid power for applying differential braking force to left and right wheels of the vehicle in response to turni... | 02/27/2007 |
| 7172041 | Drive-by-wire lawnmower The mower has at least two independently driven wheels that are each capable of bi-directional rotation. The at least two wheels are independently driven so that operation of the at least two wheels causes the at least two wheels to independently rotate which propel... | 02/06/2007 |
| 7165644 | Method and apparatus of controlling an automotive vehicle using brake-steer as a function of steering wheel torque A method of controlling an automotive vehicle having a turning radius includes determining a hand wheel torque and applying brake-steer as a function of hand wheel torque. ... | 01/23/2007 |
| 7163078 | Hydrostatic drive The invention relates to a hydrostatic drive comprising at least one hydraulic pump (1) and a first and a second hydraulic motor (6, 25), which are respectively connected to said hydraulic pump (1) by means of two service lines (4, 41, 5, 5 | 01/16/2007 |
| 7143853 | Roll-related reactive system A three-wheeled vehicle having a pair of front wheels and a single rear wheel is provided with a roll-related reactive system. The roll-related reactive system provides braking of at least one of the front wheels independent of braking initiated by an operator of th... | 12/05/2006 |
| 7140961 | Combine harvester A combine harvester with a rotor housing which is positioned in a lengthwise direction and with an inclined angle towards the horizontal line inside of the combine. To arrange the rotor housing in a favorable way inside of the combine harvester, it is suggested to u... | 11/28/2006 |
| 7121297 | Valve arrangement in a hydraulic circuit, use of the same and arrangement for controlling a hydraulic vehicle drive Arranged in a hydraulic circuit is a valve with an L-shaped duct arrangement, which is formed by a transverse duct 2 and a longitudinal duct 3. Formed in extension of the longitudinal duct 3 is a holding and guiding bore 4, in which a thr... | 10/17/2006 |
| 7117962 | Articulated forklift truck An articulated forklift truck for use in narrow aisles comprises a front chassis section (10) having a first pair of ground-engaging wheels (20) and a rear chassis section (12) having a second pair of ground-engaging wheels (22). The fron... | 10/10/2006 |
| 7114429 | Power steering assist apparatus and method of retrofitting A power steering assembly and method of retrofitting therefore includes a housing having a cavity defined therein. A drive member extends axially into the cavity and a first piston and a second piston are received in the cavity for axial reciprocation therein. The f... | 10/03/2006 |
| 7100732 | Positive traction hydraulic drive system A hydraulic drive system includes a pair of hydraulic drive motors connected in series. Each motor includes a hydraulic circuit with a spring-biased directional control valve and a pair of check valves. The circuits are located in the end cover for each motor, and a... | 09/05/2006 |
| 7077220 | Tractor with rear castor wheels A hydrostatic agricultural tractor has front ground wheels mounted on the frame at fixed angles parallel to each other and parallel to a center line of the frame and rear ground wheels mounted on a respective castor, with each of the front ground wheels being driven... | 07/18/2006 |
| 7044259 | Hydraulic transmission for driving and steering wheels In a hydraulic transmission for driving and steering wheels of a vehicle, which has at least a first pair of laterally disposed wheels, a first hydraulic pump is operatively connected to a driving source with inlet/outlet ports respectively and fluidly connected to ... | 05/16/2006 |
| 7036248 | Pattern select valve for control levers of a title work vehicle A backhoe control pattern selection arrangement is provided for a backhoe controlled by two control levers. The two levers are operatively connected to hydraulic systems that operate the boom and crowd hydraulic cylinders. An electrically operated valve block is ele... | 05/02/2006 |
| 7004268 | Vehicle having twin transmissions for driving respective wheels A vehicle comprises a vehicle frame, a prime mover mounted on the vehicle frame, a laterally turnable wheel disposed at one side of the vehicle frame, a pair of drive wheels disposed at the other side of the vehicle frame, a steering operation device, a traveling op... | 02/28/2006 |
| 6968913 | Skid steer vehicle including steering actuators to simultaneously steer one side's wheels A skid steer vehicle includes a left side steering actuator that is coupled to left front and left rear drive wheels to steer the wheels with respect to the chassis, a right side steering actuator that is coupled to right front and right rear drive wheels to steer t... | 11/29/2005 |
| 6962219 | Mechanical ZTR system with steering wheel A ZTR vehicle includes true or proper ZTR steering in the forward and reverse directions. The vehicle has independently driven locomotive drives that drive the wheels to provide mobility and steering to the vehicle. A steering wheel is included that pivots one of tw... | 11/08/2005 |
| 6953408 | Electric drive configuration for a skid steered vehicle An electric drive configuration for a tracked vehicle comprises a pair of propulsion motors (1a, 1b) each in operable communication with one of a first pair of track drive sprockets (3a, 3b) for driving a pair ... | 10/11/2005 |
| 6951091 | Riding lawn mower A rear-engine type riding lawn tractor having a frame, an engine carried on the frame, a cutting mower driven the engine, a seat set on the frame, a caster wheel supported on the front frame, a pair of drive wheels supported on the rear frame, axles connected with t... | 10/04/2005 |
| 6951259 | Multi-wheel vehicle A vehicle comprises a steering operation device, a pair of running-driving wheels, which differentially drive when the steering operation device is manipulated, a pair of steerable running wheels interlocking with the steering operation device, and a steering mechan... | 10/04/2005 |
| 6935445 | Back-up steering system for track laying vehicles A back-up steering system is provided having a hydraulic pump, an accumulator, a mode control valve, a main solenoid valve, and a pair of back-up solenoid valves. The system is connected, to left and right service brakes. The hydraulic pump and the accumulator are b... | 08/30/2005 |
| 6926111 | Vehicle having front and rear steerable driven wheels A vehicle, comprising a prime mover, a steering operation device, a first transaxle apparatus disposed at one of front and rear portions of the vehicle, and a second transaxle apparatus disposed at the other of front and rear portions of the vehicle. The first trans... | 08/09/2005 |
