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| Number | Title | Issue Date |
| 7597161 | Terrain conforming track assembly An endless track assembly that mounts to a wheeled vehicle. The assembly provides 1) a track suspension having fixed or adjustable, independently biased sets of idler wheels to vary the track contour without affecting track tension, 2) an eccentric bearing housing a... | 10/06/2009 |
| 7520348 | Tracked implement with pivotal front and trailing idlers and powered rear drive member This invention relates to a mower and a tracked implement that convert from one to the other by coupling a mower unit or a tracked unit to a common drive unit. The drive unit is thus used in both products to provide cost savings in the purchase of the equipment. In ... | 04/21/2009 |
| 7201242 | Tracked vehicle with improved track drive unit An all-terrain vehicle is supported and driven by endless track units. Each track unit includes a drive belt with rows of interior drive lugs driven by cogs on multiple sprocket wheels of a common drive wheel assembly having an integrated, one-piece drum and hub. Mu... | 04/10/2007 |
| 7083012 | Motorized traction device for a patient support A patient support including a propulsion device for moving the patient support. The patient support includes a propulsion system having a propulsion device operably coupled to an input system. ... | 08/01/2006 |
| 6983812 | Tracked vehicle with improved track drive unit An all-terrain vehicle is supported and driven by endless track units. Each track unit includes a drive belt with rows of interior drive lugs driven by cogs on multiple sprocket wheels of a common drive wheel assembly having an integrated, one-piece drum and hub. Mu... | 01/10/2006 |
| 6866108 | Wheeled-tracked vehicle hybrid A vehicle for use on a battlefield, having a hull with at least one endless track unit mounted underneath, and with a plurality of selectively vertically moveable wheels. The endless track unit may cover substantially all of the bottom side of the vehicle and may wr... | 03/15/2005 |
| 6408962 | Convertible sled for transporting large game A convertible sled can be dragged silently into the woods by the hunter. Once the hunter has bagged his game, he converts the sled into a track-driven and battery-powered cart. The sled portion is at the bottommost part of the assembly on the way into the... | 06/25/2002 |
| 5601303 | Combine trailer A trailer assembly is provided for towing a vehicle having a lift arm which can be raised and lowered. The trailer assembly utilizes a front and rear frame support which are coupled to opposite ends of the frame of the vehicle being towed. A support leg, ... | 02/11/1997 |
| 5564517 | Snowmobile conversion frame kit A snowmobile conversion frame kit including a frame member arranged for securement to a roll bar, that in turn is secured to an associated snowmobile, such that the frame member includes a steering assembly at its forwardmost end and the steering assembly... | 10/15/1996 |
| 5395129 | Wheel chair This invention relates to a wheel chair which is composed of a seat, a track device, a cushion device and an angle-regulate device so as to make the wheel chair can cross over the ditch or go up or down the stairs, when going up the stairs, user must lift... | 03/07/1995 |
| 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 |
| 4977971 | Hybrid robotic vehicle A hybrid robotic vehicle is provided for use in environments which are hazardous to humans, the vehicle being adapted to carry a payload for use in viewing the area or acquiring other types of sensory data. The hybrid robotic vehicle has a main body and f... | 12/18/1990 |
| 4915184 | Cushioning mechanism for stair-climbing wheelchair A latch for each of a pair of cushioning arms, respectively, of a stair-climbing wheelchiar. The latch for each arm includes a first member coupled to the arm and a second member coupled to a fixed support of the wheelchair, with the second member being c... | 04/10/1990 |
| 4747457 | Platform truck for transporting bulky loads A truck for transporting bulky loads, the truck having a frame provided with lateral crawler tracks and an upper load carrying platform movable in relation to the frame; a trolley assembly being connected to the frame for movement relative thereto to lift... | 05/31/1988 |
| 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 |
| 4592693 | Carrying platform for receiving a goods van or container and provided with means for its adaptation to transport by road, rail and sea The carrying platform includes means for adapting it to railway bogies, a tracked road bogie or a support structure in a boat for transporting the van by railway, road or sea. The platform comprises a frame having two parallel side-members 100 each of whi... | 06/03/1986 |
| 4566551 | Stair-climbing conveyance An improved power driven conveyance intended primarily for use by handicapped persons or invalids. A power means to drive the conveyance on level surfaces at normal pedestrian speeds and or to ascend or descend conventional or irregular stairways at reduc... | 01/28/1986 |
| 3937288 | All terrain vehicle A power driven vehicle having a set of wheels mounted along each of its sides and having endless tracks suspended between the two sets of wheels in an arrangement that substantially covers the whole underside of the vehicle and thereby renders the vehicle... | 02/10/1976 |
