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...that Kleenex tissue was originally designed to be a gas mask filter? It was developed at the beginning of World War I to replace cotton, which was then in short supply as a surgical dressing.
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| Number | Title | Issue Date |
| 8186699 | Wheelchair lever drive system A manual propulsion mechanism for wheelchairs utilizes a lever pivotally mounted to the hub of each rear wheel such that the wheelchair user can propel the chair with push/pull movements of the levers. Forward and reverse propulsion directions are accomplished by a ... | 05/29/2012 |
| 7967314 | Wheeled vehicle drive mechanism with hand lever arm A wheeled vehicle drive mechanism is provided that has a hand leverage arm and one or more horizontal gears to move associated drive gears. A drive chain meshed with a fixed drive sprocket keyed to the drive gears may be used to transmit motion from the horizontal g... | 06/28/2011 |
| 7963539 | Wheelchair A wheelchair comprises a main frame and a seat mounted on the main frame. A pair of front wheels and a pair of rear wheels are also mounted on the frame. A propulsion mechanism is provided for driving the rear wheels, the propulsion mechanism comprising an arm lever... | 06/21/2011 |
| 7360780 | Apparatus for hand propulsion and steering of a scooter, tricycle or bicycle An apparatus is disclosed by means of which an operator both propels and steers a scooter, tricycle, or bicycle with a single set of handlebars. Power is applied by pumping the handlebars up and down, and steering is positive, and very similar to that of a conventio... | 04/22/2008 |
| 7360841 | Articulating leg rest for a wheelchair An articulating leg rest is provided having a first member pivotally connected to a base frame. The base frame may be either connected to or part of a wheelchair frame. A second member is telescopically received by the first member. A drive system includes a motor-d... | 04/22/2008 |
| 7344146 | Quadracycle The improved wheelchair employs the use of two push levers attached to two forward drive gears, and two reverse drive gears, which propel the two main rear wheels of the chair through bicycle chains connecting the front drive gears to sprocket clusters mounted on th... | 03/18/2008 |
| 7341543 | Apparatus for shifting weight from a runner to a wheeled frame An apparatus for shifting the body weight of a runner from a runner's legs to a wheeled frame for enhancing the runner's performance and minimizing leg strain comprises a loop of elastic rod-shaped material stretchable during standing and during running movement. A ... | 03/11/2008 |
| 7318592 | Motorcycle steering damper According to the invention, there is provided a steering damper (10) in which the interior of a cylinder (12) is divided into two oil chambers (A), (B) by a piston (14) which slides in the cylinder (12) as a steering operation takes place... | 01/15/2008 |
| 7303202 | Apparatus for the transfer of linear human power to a rotating member An apparatus for the transfer of linear human power to a rotating member is disclosed, which is adaptable to exercise equipment, wheeled chairs, scooters, bicycles, tricycles, etc. The hands of the operator apply the power during the downward stroke of an up-and-dow... | 12/04/2007 |
| 7296811 | Wheelchair propulsion device This invention provides wheelchair propulsion devices that do not contact the axles of the wheels to which they are attached, that decrease the amount of force required to propel the wheelchair, and that can be easily installed. The devices toggle between sliding wi... | 11/20/2007 |
| 7293790 | Omni-directional toy vehicle The invention relates with the omni-directional toy vehicle that can move in all directions of forward, backward, rotational, left and right movement by driving manually the omni-directional wheels installed at the vehicle and combining their rotational directions. ... | 11/13/2007 |
| 7293623 | Assembly of a wheelchair and a reclining cycle An assembly comprising a wheelchair and a reclining cycle part which are connectible to each other with the aid of a coupling, the reclining cycle part comprising a wheel and at least one pedal with which the wheel is drivable, so that the assembly in a coupled cond... | 11/13/2007 |
| 7281724 | Wheeled work chair A wheel work chair has all the attributes and style of an office chair but is equipped with wheelchair-type supporting wheels The chair is height adjustable with the upper portion of the chair moving relative to the lower portion of the chair. Wheels connected to th... | 10/16/2007 |
| 7261309 | Wheelchair drive mechanism A wheelchair which shifts between forward and reverse by virtue of a roller mechanism which grabs in one direction and slips an opposite direction, thereby preventing binding. The shift mechanism is initiated by rotation of a shift paddle which is located on a extre... | 08/28/2007 |
| 7226062 | Recreational wheelie vehicle An amusement-type vehicle is provided particularly for doing so-called wheelies having a short wheel base upon a platform-type base with at least two side by side wheels forwardly and one wheel rearwardly upon which wheelies are performed and having a central handle... | 06/05/2007 |
| 7188853 | Tricycle A tricycle is comprised of a frame, a front wheel, a parallel four-bar linkage, two rear wheels, and two handlebars. The frame includes a stationary fork connected with the front wheel. The linkage is mounted at a rear section of the frame, having two side bars. The... | 03/13/2007 |
| 7150461 | Foldable skateboard A skateboard comprising an articulated structure having a foot platform, at least one forward and one rearward ground engaging wheel. The articulated structure is foldable between a skating position and a folded position. With the skateboard in the skating position,... | 12/19/2006 |
| 7140626 | Running exercise bike An exercise apparatus including a seatless frame for simulating running without the stress producing loads associated with each stride. The exercise apparatus has at least one front wheel and at least one rear wheel, both of which are rotationally connected to the f... | 11/28/2006 |
| 7108004 | Mobility aiding device A mobility aiding device, such as a walker, a wheelchair, a transport chair, a shower seat or a rollator, are used in providing support to injured or ailing persons during activity or movement. A solid two-piece seating platform is provided with a structural support... | 09/19/2006 |
| 7070191 | Safety driving arrangement for twist vehicle A twist vehicle includes a vehicle frame, a driving system, and a safety driving arrangement. The driving system includes a transmission member, having an upper portion connected to a steering member, rotatably supported by the vehicle frame. The safety driving arra... | 07/04/2006 |
| 7021639 | Bicycle of type driven by operation of handle Disclosed herein is a bicycle of the type driven by operation of a handle. According to the present invention, a shaft rod of the bicycle is installed with a hinge so as to enable the handle to rotate forward or backward. The handle is bent by a constant angle on th... | 04/04/2006 |
| 7021638 | Safety driving arrangement for twist vehicle A twist vehicle includes a vehicle frame, a driving system, and a safety driving arrangement. The driving system includes a transmission member, having an upper portion connected to a steering member, rotatably supported by the vehicle frame. The safety driving arra... | 04/04/2006 |
| 7007962 | Child's swaying bike A child's swaying bike includes a seat, two rear rollers, a center rod, two front rollers, and a handlebar. The bike can move forward by swaying of the center rod to the right and the left. The handlebar can be pivotally connected quickly with the center rod by inse... | 03/07/2006 |
| 6932370 | Human-powered, ride-on vehicle A human-powered, ride-on vehicle, includes a main longitudinal frame member having a steering/drive mechanism mounted thereon for oscillating movement; a driven rear wheel having an axle, a rear sprocket operatively fixed to the rear wheel for coastable engagement t... | 08/23/2005 |
| 6916032 | Manually-propelled vehicle and related systems The invention provides a propulsion, braking and anti-rollback control assembly for use in manually propelled vehicles such as wheelchairs. In one embodiment, the invention provides a wheelchair with a control lever assembly and related force conveyance connecter th... | 07/12/2005 |
| 6893035 | Wheelchair drive mechanism A wheelchair which shifts between forward and reverse by virtue of a roller mechanism which grabs in one direction and slips an opposite direction, thereby preventing binding. The shift mechanism is initiated by rotation of a shift paddle which is located on a extre... | 05/17/2005 |
| 6874587 | Electric vehicle with electric-free driving system An electric vehicle includes a vehicle frame, at least a driven wheel rotatably supported by the vehicle frame, and a power generator device including a clutch device for selectively engaging with the driven wheel assembly to drive the driven wheel rotate. The elect... | 04/05/2005 |
| 6866278 | Small man-powered bump car A small man-powered bump car that requires only human muscle as its energy source. Extended play, either individually or in a group, can be enjoyed by riders of the bump car in a relatively level ground. Riders are safely enclosed in a body panel while engaging in a... | 03/15/2005 |
| 6708996 | Manpower-driven cycle with rower mechanism A manpower-driven cycle comprising a driving mechanism transforming a reciprocating motion of a handle into a rotary motion of a rear wheel. A steering and maintaining device comprises a telescopic actuating system with articulated tubes along parallelograms deforma... | 03/23/2004 |
| 6581947 | Steerage of a vehicle A hand cycle includes a frame and a seat which is pivotable relative to the frame about a longitudinally extending axis to effect steerage of the hand cycle.... | 06/24/2003 |
| 6578860 | Dual function wheelchair The present invention implements a releasable wheel mounting mechanism and a dual braking system to provide a wheelchair that transforms from a conventional wheelchair to a companion wheelchair. A set of small rear wheels traditionally found on a companio... | 06/17/2003 |
| 6572129 | Dual power recumbent tricycle A recumbent tricycle which includes a propulsion system which includes a combination of foot and arm power for propulsion. Pedals are operated with the rider's legs. Handles are also connected to the drive mechanism, with the handles pulled back and pushe... | 06/03/2003 |
| 6561534 | Twist vehicle with rear operation system A twist vehicle which includes a rear operation system wherein the steering unit of twist vehicle is mounted in a relatively rear position with respect to the vehicle frame, such that a rider can drive the twist vehicle without leaning forwardly and uncom... | 05/13/2003 |
| 6557879 | Land rower This is a hand-propelled wheeled device for a rider. The device includes: a frame with two sides; a first and second drive wheel rotatably mounted to the two sides; a first hand crank connected to the first drive wheel through a first crank hub, and a fir... | 05/06/2003 |
| 6554309 | Bicycle pedaling power unit with leverage shifting A system for powering vehicles such as bicycles using leverage type pedals each connected to a freewheeling sprocket and then connected to a common drive shaft in the rear of the vehicle. A keyed shaft connects all free wheeling sprockets and provides for... | 04/29/2003 |
| 6499755 | Operation arrangement for a twist vehicle The present invention relates to an operation arrangement, particularly to an operation arrangement for a twist vehicle having a sliding slot located on an end portion of an driving frame, a pivot shaft located opposite to the sliding slot, a sliding shaf... | 12/31/2002 |
| 6386304 | Electric vehicle with electric-free driving system An electric vehicle having a steering assembly, a front wheel assembly, and an electric drive assembly. The steering assembly includes a rotatably mounted steering shaft and a steering hand mounted at an upper end of the steering shaft. The front wheel as... | 05/14/2002 |
| 6361058 | Playcart movable with hands A playcart movable with hands has two wheel supports each has a side wheel fitted onto it. The wheel supports are each connected to a connecting plate with two pins. The connecting plates are each connected to one of two bent ends of a front support membe... | 03/26/2002 |
| 6276703 | Land rower This is a hand-propelled wheeled device for a rider. The device includes: a frame with two sides; a first and second drive wheel rotatably mounted to the two sides; a first hand crank connected to the first drive wheel through a first crank hub, and a fir... | 08/21/2001 |
| 6276760 | Quick release hub for cycle wheel A quick release hub assembly having an elongate hollow axle for receiving thereon a captively held rotatable wheel. For attachment and release, the assembly is provided with an insert mechanism, which fits within a tubular opening on a vehicle. The assemb... | 08/21/2001 |
