Did You Know...
...that it was melting ice cream that inspired the invention of the outboard motor? It was a lovely August day and Ole Evinrude was rowing his boat to his favorite island picnic spot. As he rowed, he watched his ice cream melt and wished he had a faster way to get to the island. At that moment the idea for the outboard motor was born!
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| Number | Title | Issue Date |
| 7311160 | Wheelchair with forced driven front caterpillar wheels The present invention relates to a wheelchair with forced driven front caterpillar wheels with a cable-hauling ratchet lever by which a user, by himself/herself, can pass over a road-block or drains on roads, lifts up the caterpillars from the ground for easy steeri... | 12/25/2007 |
| 7255184 | Track assembly A track assembly having first and second hub assemblies that are operatively connected to a support frame by first and second attachment members, respectively. The first and second attachment members include resilient or movable mounts that are configured so that th... | 08/14/2007 |
| 7188694 | All-surface vehicle An all-surface vehicle comprising a pair of large inflatable tubes mounted on a common axis with sufficient buoyancy to enable the vehicle to travel on water and having a motor for independently driving each of the tubes, together with a passenger or load carrying c... | 03/13/2007 |
| 7134829 | Cargo trailer A trailer for carrying cargo includes a frame, at least two axles mounted to the frame, and a deck. The axles have wheels at opposite ends of the axles for movably supporting the frame above the ground. The deck is pivotally mounted to the frame and is pivotable abo... | 11/14/2006 |
| 6945342 | Track drive undercarriage device, kit and method A track drive undercarriage device, a kit for the device, and a method of using the same are described attached to a chassis of a heavy construction work vehicle for operationally connected to a transmission and drive shaft of the construction vehicle. The device is... | 09/20/2005 |
| 6857490 | Stair-climbing wheelchair A stair-climbing wheelchair has a pair of track assemblies that can be placed in an operative drive mode to propel the wheelchair along ascending and descending paths of travel relative to an obstacle such as a stairway, curb, or the like. Each track assembly includ... | 02/22/2005 |
| 6631778 | Shock linkage assembly for a snowmobile suspension system The present invention provides a snowmobile suspension system comprising a slide frame for engagement with an endless track, a suspension arm, a bracket arm, and a rocker arm. The suspension arm has an upper portion adapted to be pivotally mounted relativ... | 10/14/2003 |
| 6237705 | Self-propelled stairs moving unit The self-propelled stairs moving unit A1 moves on stairs, putting a manual wheelchair K on the pallet 7, by driving the front crawler traveling units 1a, 1b and the rear crawler traveling units 2a, 2b wherein right and left are unitedly connect... | 05/29/2001 |
| 6000485 | Tracked vehicle The invention relates to a tracked motor vehicle (10) with an engine-equipped vehicle drive module (12) with two parallel track carrier units (14) attached to the sides of the drive module in the longitudinal direction of the vehicle. The drive module (12... | 12/14/1999 |
| 5287938 | Vehicle suitable for on- and off-road use A vehicle suitable for on-and off-road use has a track drive with auxiliary frames mounted under the vehicle frame between front and rear wheels, the auxiliary frames having continuous tracks on carrier wheels driven by hydraulic motors, each auxiliary fr... | 02/22/1994 |
| 4960180 | Wheelchair A wheelchair is provided with an endless track drive for travel over rough ground. The endless track drive is detachably connected to the wheelchair by a frame such that a lower run of each of the endless tracks is located adjacent a lower periphery of ea... | 10/02/1990 |
| 4821824 | Auxiliary traction system An attachment for tractors is mounted on the tractor frame, and provides an endless track system for supporting and driving the tractor through power supplied with chains engaging sprockets secured to the conventional drive wheels. The position of the tra... | 04/18/1989 |
| 4813466 | Support track for a wheeled vehicle An improved support track assembly for both protecting and improving the flotation and mobility of the resilient wheels of a vehicle is disclosed herein that comprises both a manually operable retention assembly for fastening the track into an endless bel... | 03/21/1989 |
| 4687068 | Invalid's wheelchair and like conveyances To enable an invalid's wheelchair to negotiate stairways, it has a chassis frame equipped with ordinary motor-driven road wheels for level running and a pair of crawler belts for stair ascent or descent. Either the wheels or the belts may be selected, eit... | 08/18/1987 |
| 4674584 | Stair-climbing wheelchair with stair step sensing means A stair-climbing wheelchair having a sensor at the front end thereof for sensing the presence of a stair step or an inclined ramp. The sensor emits signals which reflect from a surface and to a receptor in the sensor, the receptor being coupled to a micro... | 06/23/1987 |
| 4671369 | Stair-climbing wheelchair with means for cushioning vertical movements thereof A stair-climbing wheelchair having wheels defining a first wheel base and a pair of endless, flexible tracks providing a second wheel base, there being a motor-driven structure for moving the tracks into and out of ground-engaging positions. A first pivot... | 06/09/1987 |
| 4657099 | Track-laying auxiliary thrust vehicle A track-laying auxiliary thrust unit is connectable to a steerable wheeled or skid-mounted vehicle to add thrust and reduce the per unit area force on the ground. Various couplings are disclosed for interconnecting the thrust unit with the vehicle. The th... | 04/14/1987 |
| 4595068 | Transmission apparatus A transmission apparatus converts rotational motion into technically linear motion and can be used for vertically displacing wheels or tracks on an off-the-road vehicle. The transmission apparatus includes at least one stationarily mounted control disk wi... | 06/17/1986 |
| 4564080 | Invalid's wheelchair and like conveyances To enable an invalid's wheelchair to negotiate stairways, it has a chassis frame equipped with ordinary motor-driven road wheels for level running and a pair of crawler belts for stair ascent or descent. Either the wheels or the belts may be selected, eit... | 01/14/1986 |
| 4560019 | All-terrain vehicle with tractive roller assembly An all-terrain vehicle includes a vehicle body with ground-engaging tracks and boom members pivotally mounted at each end of the vehicle which support generally cylindrical, cleated roller assemblies, the roller assemblies being characterized by having a ... | 12/24/1985 |
| 4541498 | Apparatus for increasing vehicle mobility Apparatus adapted to be mounted on a vehicle frame for the purpose of increasing traction comprises an L-shaped framework, a first shaft rotatably mounted on the upper portion of the framework, a second shaft rotatably mounted on the framework and dispose... | 09/17/1985 |
| 4496015 | Interchangeable drive means for a vehicle A cross country vehicle for seismic exploration is provided wherein a first drive means, such as wheels can be conveniently interchanged, in the field, for a second drive means having a different configuration such as endless tracks. The interchange is en... | 01/29/1985 |
| 4391343 | Retractable tracted cart A convertible traction device for permitting a road vehicle to be used in an off-road configuration is described. The device is provided as a trailer having a pair of retractable road wheels with a pair of traction belt assemblies mounted thereon. The tra... | 07/05/1983 |
| 4227562 | Road traction apparatus Vehicular road traction apparatus feeds a traction portion of an endless chain between a tire and the road surface and a recirculating portion of the chain is picked up aft of the tire and fed into a conduit which conducts it back to a point fore of the t... | 10/14/1980 |
| 4204583 | Wheeled vehicle with rotatable endless track A wheeled vehicle having a source of driving power and a chassis extending longitudinally of the vehicle, which comprises a rotatable endless track device disposed between front and rear wheels of the vehicle, a system for selectively raising and lowering... | 05/27/1980 |
| 3930553 | Track tension control A known vehicle normally operating on independently suspended trailing arms nd pneumatic tires can be converted to a tracked vehicle by wrapping endless tracks around the tire tread areas in multiples of two. An expansible wheel-connector device is provide... | 01/06/1976 |
