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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 |
| 7413206 | Extra hand powered bicycle A drive system for use with a bicycle includes first and second gears arranged so that the second gear is rotatably driven responsive to the first gear. A freewheel is operatively coupled to the second gear, and a drive sprocket is operatively coupled to the freewhe... | 08/19/2008 |
| 7293789 | Wide power range bicycle with positive intuitive gear shifting system A pedal lever type bicycle includes a pedal lever having a front portion and a rear portion, with an intermediate pivot point located substantially above the center of the rear wheel, and to the rear of the front of the rear wheel. The rear portion of the pedal leve... | 11/13/2007 |
| 6920953 | Electrically assisted pedaled vehicle An improved electrically assisted bicycle has rear wheel, right and left, propulsion elements, each side having a modified freewheel that carries a hand operated electromagnetic-mechanical pawl, deployed along a pedal bar by a tape connected to a pawl positioning co... | 07/26/2005 |
| 6749211 | Bicycle with reciprocal pedal levers having shiftable pivot axis for transmission ratio change This invention relates to a cycle, such as a bicycle, having reciprocal pedal levers for propelling at least one wheel of the cycle. The cycle has a frame that includes a rack, a left pedal lever with a rack and a right pedal lever with a rack. A pinion is carried o... | 06/15/2004 |
| 6723029 | Pedal mechanism for cycles A drive mechanism for bicycles or similar exercise equipment in which the left and right pedals move generally up and down in a vertical plane. The pedals slide on vertical slide bars from their top to bottom positions. The pedals are connected by a pedal chain that... | 04/20/2004 |
| 6705630 | Personal vehicle The present invention provides an easy turning and highly accurate personal vehicle. This is accomplished by providing a frame with at least one hubless wheel, wherein the passenger's foot may be contained. As such, the foot may accurately and safely steer and at th... | 03/16/2004 |
| 6626442 | Rolling foot apparatus with motion-conversion mechanism A rolling foot-powered apparatus mounted for movement on rotatable rollers and including at least one upper movable assembly, a lower stationary assembly, and at least one motion-conversion mechanism or an alternatively retractable motion-conversion mecha... | 09/30/2003 |
| 6619682 | Scooter An occupant propelled vehicle is provided that includes a frame having a front portion and a rear portion, front and rear wheels, a platform, a steering mechanism and a drive mechanism. The drive mechanism may include a drive sprocket mounted on the frame... | 09/16/2003 |
| 6572128 | Ratchet propulsion system for scooters A scooter propulsion system is provided both as a kit for retrofitting and as an improved original manufacture. A foot pedal pivots forwardly and rearwardly as the user presses on a front foot pedal portion and rear foot pedal portion, respectively. A rat... | 06/03/2003 |
| 6499747 | Rocking cycle The present invention relates to a manually powered vehicle, such as a child's ride-on toy. The vehicle is powered by a rocking, or up-and-down, motion of the rider. The rocking motion is mechanically translated into a force for propelling the ride-on veh... | 12/31/2002 |
| 6419251 | Propelling scooter A propelling scooter includes a chassis, a front wheel steerably attached to a front end of the chassis, a rear wheel rotatably attached to a rear end of the chassis and an elongated pedal disposed longitudinally above the chassis. The pedal has a backwar... | 07/16/2002 |
| 6398244 | Propelling scooter A propelling scooter includes a chassis, an upright head tube with a handle, a front wheel, and a rear wheel. An elongated pedal is disposed swingably on the chassis. A horizontal transverse first shaft is journalled on the chassis, and is connected fixed... | 06/04/2002 |
| 6382043 | Transmission assembly for a bicycle having forward/back gear A bicycle transmission assembly comprises a gear shifting device and a reciprocating pedal device that are mounted to a bicycle frame. The reciprocating pedal device comprises a reverse gear train consisting of a first reverse gear and a second reverse ge... | 05/07/2002 |
| 6371502 | Universal conversion kit for human powered wheelchairs The present invention provides an economical, universal wheelchair conversion kit which offers two, hand-powered, variable-resistive, drive mechanisms for the main wheels of a wheelchair which can be retrofitted to existing wheelchairs and that provide th... | 04/16/2002 |
| 6325400 | Treadle-type vehicle body forward drive structure A treadle-type vehicle body forward drive structure comprised of a base plate, a transmission assembly and a treadle structure installed onto the base plate, a gear assembly enmeshing the transmission assembly to the treadle structure, and a position limi... | 12/04/2001 |
| 6311998 | Geared scooter The present invention relates to a geared scooter comprising a deck assembly, a handlebar, a front wheel assembly and a rear wheel assembly. The front wheel assembly and the rear wheel assembly are arranged at front and rear ends of the deck assembly. The... | 11/06/2001 |
| 6237928 | Pedaled propulsion system A pedaled propulsion system has left and right foot pedals that travel up and down on roller slides on track members mounted on the bicycle frame. An endless drive web passes between the pedals and loops around a driven wheel at one end of the track assem... | 05/29/2001 |
| 6189907 | Treadle cart A treadle cart, having two axles, each axle having one of two pairs of wheels mounted on it, the treadle cart being powered by the pivoting motion of a treadle board which transfers the power from the pivoting of the treadle board through a drive means in... | 02/20/2001 |
| 5839737 | Self propelled skateboard The present invention relates to a self propeller skateboard (10) comprising upper deck (12A) pivotally mounted on a drive shaft (22) having a left drive wheel (18L) securely fastened at a left distal end and a right drive wheel (18R) securely fastened at... | 11/24/1998 |
| 5662346 | Pedal mechanism for cycle and exercise equipment The invention discloses a pedal mechanism for a bicycle or a piece of exercise equipment which allows one to impart forward motion to the drive wheel of the bicycle through an alternating or stair climbing pedalling motion. The downward force of one of th... | 09/02/1997 |
| 5662347 | Pedal mechanism for cycle and exercise equipment A Pedal mechanism for a bicycle or similar piece of exercise equipment is disclosed which allows one to apply a forward force to the drive wheel by simultaneously pressing down on both pedals of the bicycle. The pedals are positioned parallel to one anoth... | 09/02/1997 |
| 5551718 | Pedal mechanism for cycle and exercise equipment A bicycle mechanism to permit a forward force to be applied to the bicycle's drive wheel by backward rotation of the bicycle's pedals in addition to permitting a forward force to be applied to the drive wheel by a forward rotation of said pedals. A prefer... | 09/03/1996 |
| 5294140 | Self-propelled vehicle A self-propelled vehicle includes a frame having a pair of foot treadles mounted in side-by-side relation and depressible with respect to the frame; an overrunning clutch for each of the foot treadles and having a drive member coupled to its respective fo... | 03/15/1994 |
| 5242181 | Human powered vehicle with improved drive system A human powered vehicle is disclosed. The vehicle includes a frame with the capability for supporting an operator one the frame. The vehicle further includes a drive wheel mounted for rotation to the frame, and a mechanism powered by the drive wheel to pr... | 09/07/1993 |
| 5066031 | Self-propelled vehicle A self-propelled vehicle includes a pair of foot treadles mounted in side-by-side relation, and an overrunning clutch for each foot treadle. Each foot treadle is mounted to the frame by a four-link parallelogram retaining the respective foot treadle subst... | 11/19/1991 |
| 4953882 | Transmission apparatus for bicycle or like pedal-operated vehicle A pedal driven vehicle is provided wherein up and down movement of a pair of pedals is converted into rotary motion of a drive wheel to provide vehicle locomotion. A chain or belt connected at the ends thereof to the pedals is movable back and forth in op... | 09/04/1990 |
| 4915403 | Skateboard with mechanical drive A skateboard has a frame (1) on which a petal (7b) is pivotably mounted. When the pedal (7b) is pressed down its movement is converted via a push rod (16), a crank (26) and a toothed segment (29) into a rotational movement which is transmitted to a gear t... | 04/10/1990 |
| 4865344 | Wheelchair hand propulsion apparatus An apparatus or attachment to a wheelchair to allow a patient to move the chair in a forward, reverse, right or left direction. The apparatus comprises a push rod, spring mounted, actuating at a first end a pawl capable of engaging a ratchet axially mount... | 09/12/1989 |
| 4781630 | Muscular force actuated vehicle On the vehicle are mounted an actuation member, a force transmission unit and a drive element. Preferably, the actuation member is comprised of two levers, each of them being fixed to a metal cable each connected to a chain, the two chains actuating the w... | 11/01/1988 |
| 4779863 | Running exercise bicycle A running exercise bicycle is ridden by a user who alternately pedals two pedals to drive two rotary wheels into unidirectional rotation via two sets of individual mechanical drive devices to make the exercise bicycle move forward in a zigzag or straight ... | 10/25/1988 |
| 4762332 | Wheel chair A wheelchair having a propulsion and speed change mechanism, the mechanism has a clutch with a cam clutch (21) and a cylindrical fly wheel (23) installed on a hub (24) of the shaft (25) of the main wheel of the chair. The clutch includes roller bearings (... | 08/09/1988 |
| 4761014 | Propulsion of scooters A scooter of an ordinary general shape but equipped with an improved mechanical drive for the rear wheel or wheels, which drive is comprised of a ratchet mechanism for driving the rear wheel, a stepping lever for transferring the stepping force of the rid... | 08/02/1988 |
| 4666173 | Foot pedal drive for bicycles A bicycle having pedal bars pivoted on the frame near the rear wheel, with a pedal sprocket positioned above the rear wheel. A connection member couples the rear end of each of the pedal bars to the pedal sprocket and further includes conversion mechanism... | 05/19/1987 |
| 4666174 | Wide powerful range bicycle A pedal lever type bicycle includes a pedal lever having a front portion and a rear portion, with an intermediate pivot point located substantially above the center of the rear wheel, and to the rear of the front of the rear wheel. The rear portion of the... | 05/19/1987 |
| 4657273 | Two-wheeled cycle A longitudinal frame is provided having upper front and rear end portions, a first stationary wheel supporting fork is dependingly supported from one of said portions and a second wheel supporting fork is oscillatably supported from the other frame portio... | 04/14/1987 |
| 4473236 | Pedal drive mechanism For a vehicle such as a bicycle having a frame and at least one drive wheel, a driving sprocket, and an endless chain connecting the sprocket to the drive wheel, an improved propelling mechanism having two longer than usual pedal arms pivotally mounted on... | 09/25/1984 |
| 4445701 | Vehicle structure There is provided a vehicle which includes a frame, a steerable wheel mounted on the frame and at least one further wheel mounted for free rotation on the frame. A flywheel is mounted for rotation adjacent one of the wheels. The vehicle includes means for... | 05/01/1984 |
| 4227712 | Pedal driven vehicle A pedal driven vehicle such as a bicycle which employs oscillating levers instead of crank type pedals, and endless chain to which the two pedal levers are respectively connected, one to each run of the chain by pull and push rods to impart an oscillatory... | 10/14/1980 |
| 4108459 | Spring powered bicycle A mechanism for a rider propelled vehicle having a frame and a ground engaging wheel mounted on it comprising two lever arms on opposite sides of frame, extending backwardly, with foot pedals on their extremities and mounted each on a cylindrical oscillat... | 08/22/1978 |
