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"That’s an amazing invention, but who would ever want to use one of them?"
President Rutherford B. Hayes ; Said in 1876, after Alexander Graham Bell demonstrated the telephone to him at the White House
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| Number | Title | Issue Date |
| 8136830 | Towable impact attenuator A crash attenuator includes a crash cushion having a front end and a rear end, and a restraint element disposed adjacent the front end and capable of being coupled to a towing vehicle. The crash attenuator further includes at least one wheel supporting the crash cus... | 03/20/2012 |
| 7874572 | Towable impact attenuator A crash attenuator includes a crash cushion having a front end, a rear end, and a trailer hitch component disposed adjacent the front end. The trailer hitch component is capable of being secured to a mating hitch component located on the towing vehicle, such that hi... | 01/25/2011 |
| 7784812 | Central multi directional transmission system A dual chassis with multi-directional transmission wherein a front chassis and a rear chassis can be united to function as a traditional chassis or separated when traveling over uneven terrain. A multi-directional transmission serves to increase the distance between... | 08/31/2010 |
| 7766362 | Method and apparatus for the lineal, straight, reverse movement of one or more vehicles in tow behind a prime mover A secondary trailer hitch is provided by the present invention for allowing the lineal, straight, reverse movement of one or more vehicles in tow behind a prime mover. The secondary trailer hitch includes a housing configured for being connected with a first vehicle... | 08/03/2010 |
| 7712761 | Extension coupling for interconnecting trailer and tow hitch An extension coupling for interconnecting a trailer to a tow hitch carried on a tow vehicle includes a pin box assembly having a first end and a second end. The first end is pivotally connected to the trailer. A king pin is connected to the second end. The pin box a... | 05/11/2010 |
| 7527279 | Trailer hitch assembly A trailer hitch assembly is used with a trailer having a plurality of wheels each rotatable about a horizontal axis and a vertical axis. The hitch assembly includes coupling elements on the trailer for fixedly engaging the trailer to a towing vehicle in a horizontal... | 05/05/2009 |
| 7464955 | Articulated vehicle Method and arrangement including a vehicle having a first and a second vehicle section connected to an articulation that allows rotation about a vehicle longitudinal axis of the vehicle. A positioning arrangement is included that has at least one adjusting device in... | 12/16/2008 |
| 7341397 | Utility trailer and safety barrier for street repair A utility trailer provides a frame defining a forward open bottom work space, a medially rearward deck and a rearwardmost extendable impact attenuator. Hitch structure encloses the forward portion of the work space. The impact attenuator is deployable spacedly rearw... | 03/11/2008 |
| 7293377 | Wear pad for an extendable linkage A wear pad on a linkage of a work machine is disclosed. The linkage includes a first and a second linkage member in a telescoping relationship. The wear pad includes a first end having a first thickness and a second end having a second thickness, the first thickness... | 11/13/2007 |
| 7273114 | Elimination of jack-knifing of the tractor-trailers A tractor-trailer coupling mechanism for a powered tow vehicle and unpowered trailer vehicle which eliminates jack-knifing. The coupling includes at least one extension or more on the trailer vehicle which is constructed to slide into a receptor channel or recesses ... | 09/25/2007 |
| 7175192 | Foldable bicycle A foldable bicycle includes a frame. A first foldable device is connected to a top tube of the frame so as to fold a front wheel together with a head tube and a handlebar backward at the first foldable device such that the front and rear wheels are located parallel ... | 02/13/2007 |
| 7074003 | Helicopter moving device A helicopter moving device has a lever arm, a helicopter support arm to attach to a helicopter, and a wheel mounted to the lever arm, such that applying downward pressure to the lever arm causes a corresponding upward movement of the helicopter support arm about a p... | 07/11/2006 |
| 7063364 | Bumper arrangement A moveable bumper arrangement. The moveable bumper arrangement includes an elongated bumper member, an end bumper member, and a mechanism coupled to the end bumper member. The mechanism allows substantially translational movement of the end bumper member with respec... | 06/20/2006 |
| 7055848 | Folding trailer A foldable trailer that is attachable to a vehicle, particularly an ATV, for hauling a load. The trailer includes a hitch assembly for attachment to the vehicle, a first bed rotatably attached to the hitch assembly, and a second bed rotatably attached to the first b... | 06/06/2006 |
| 7044493 | Trailer hitch tow bar assembly The invention is a tow bar assembly used for towing trailers with vehicles. The tow bar assembly is located between the vehicle and the hitch assembly, such as a ball mount hitch assembly. ... | 05/16/2006 |
| 7032919 | Tow bar for vehicle A tow bar for connecting a towed vehicle to a towing vehicle, the tow bar comprising a towing vehicle connection mechanism connected to the towing vehicle; a towed vehicle connection mechanism connected to the towed vehicle; and an interconnecting mechanism connecti... | 04/25/2006 |
| 7032918 | Stabilization of an articulated vehicle A method for stabilizing an articulated vehicle, which articulated vehicle comprises at least a front frame structure and a rear frame structure, and a frame joint structure, which is arranged to couple the frame structures to each other and to allow them to rotate ... | 04/25/2006 |
| 6991246 | Trailer hitch assembly A trailer hitch assembly is used with a trailer having a plurality of wheels each rotatable about a horizontal axis and a vertical axis. The hitch assembly includes coupling elements on the trailer for fixedly engaging the trailer to a towing vehicle in a horizontal... | 01/31/2006 |
| 6866284 | Crash attenuator for vehicle and method for transporting such attenuator Impact attenuating device for vehicles with frame side members. The attenuator includes an attenuating part, wheels and a connecting part which connects the device to the vehicle either in an operating position or in a transport position. To be able to transport the... | 03/15/2005 |
| 6749213 | Drawbar support assembly A vehicle drawbar support assembly for supporting a drawbar pivotally coupled to a frame of the vehicle includes a drawbar support attached to the frame. The support engages and supports an end of the drawbar. A pair of bushing members are mounted to the support on ... | 06/15/2004 |
| 6712380 | Trailer A trailer, comprising a trailer coupler portion, a trailer frame attached to the trailer coupler portion, and at least one caster wheel attached to the trailer frame. The trailer coupler portion comprises a trailer hitch including a proximal hitch portion, a distal ... | 03/30/2004 |
| 6591918 | Agricultural tractor hitch A draft link of an agricultural tractor three-point hitch has a recessed pocket on the inside surface thereof. The recessed pocket has a convex back wall surface with a center of curvature. A bumper is disposed in the pocket and has a concave inner surfac... | 07/15/2003 |
| 6523629 | Tandem mobile robot system A robotic vehicle system for terrain navigation mobility provides a way to climb stairs, cross crevices, and navigate across difficult terrain by coupling two or more mobile robots with a coupling device and controlling the robots cooperatively in tandem.... | 02/25/2003 |
| 6488306 | Mobility platform coupling device and method for coupling mobility platforms A coupling device for connecting a first mobility platform to a second mobility platform in tandem. An example mobility platform is a robot. The coupling device has a loose link mode for normal steering conditions and a locking position, tight link mode f... | 12/03/2002 |
| 6443475 | Movable drawbar control system A movable drawbar control system for use on a typical tractor and specifically on endless track type tractors. The drawbar control system is hydraulically controlled by the user of the tractor via controls in the cab. The system uses a hydraulic cylinder ... | 09/03/2002 |
| 6340167 | Anti-jackknife trailer coupling This invention is a trailer-tractor rig coupling that prevents jackknifing. It performs like a standard coupling in all normal cases, but if on icy roads, the semi slips and turns opposite to the steering wheel, the coupling brake locks the semi to the tr... | 01/22/2002 |
| 6116631 | Shock absorbing trailer hitch assembly A trailer hitch assembly for attachment to a vehicle and trailer is provided with a fixed support member attached to the vehicle. A floating hitch member is attached to the trailer. Variable pressure shock absorbers interconnect the hitch and support. Rol... | 09/12/2000 |
| 6109814 | "Float/no-float" mechanism for 3-point hitch An implement-positioning apparatus used on an implement-towing vehicle such as a tractor includes a draft arm, a lift link, and a mechanism coupling the arm and the link together. The mechanism selectively permits floating arm movement (and therefore floa... | 08/29/2000 |
| 5823268 | Trailer hitch anti-sway device A stabilizing device comprising a rigid anti-sway roller journalled about a wear axle is mounted on an agricultural tractor. The device provides a rigid stabilizing opposing force between the draft links and the rear structure of the tractor, while allowi... | 10/20/1998 |
| 5823271 | Lifting rod for the three-point attaching device of a tractor A lifting rod for the lower steering arm of a tractor, at the ends of the lifting rod, has connecting elements in the form of a connecting yoke 6 and a ball joint 7. The connecting yoke 6, via a threaded rod 9, is threaded into a threaded bore 10 of a tub... | 10/20/1998 |
| 5725231 | Trailer hitch In accordance with the present invention there is provided a trailer hitch for quickly and easily connecting a trailer to a tractor including a draw bar, a primary pivot device for connecting the draw bar to the tractor, a hitching device connected to the... | 03/10/1998 |
| 5658003 | Trailer system A trailer system has a drawbar that connects to a flat bed via a laterally-swiveling joint. The drawbar has a forward member and an aft member. A clevis structure on the mating-end portion of each drawbar member is formed by two plates fixed to the sides ... | 08/19/1997 |
| 5601146 | Hitch assembly for a tractor A hitch assembly for a work vehicle, such as an agricultural tractor, includes a pair of mounting brackets, a rocker pivotally mounted on the brackets, a pair of draft links secured to the brackets, a pair of actuators coupled between the brackets and the... | 02/11/1997 |
| 5531468 | Trailer articulation device An articulated trailer utilizing two pivot points and an angular transfer system to control the radial movement of the front axle during turning is disclosed. The articulated trailer comprises an elongated carriage having two spaced-part, wheeled axles. T... | 07/02/1996 |
| 5528886 | Hitching arrangement for a mower deck A hitching arrangement for attaching a mower deck to a propelling vehicle has a lift shaft rotatably supported by the mower deck and extending transversely across the deck. At least one hitch arm is fixedly secured on one end to the lift shaft. The hitch ... | 06/25/1996 |
| 5509682 | Fifth wheel hitch assembly A fifth wheel hitch includes a frame for mounting to a towing vehicle and a head assembly for engaging a trailer to be towed. The head assembly is mounted for pivotal movement relative to the frame by means of a pivot pin secured to the head assembly, a y... | 04/23/1996 |
| 5404958 | Lifting structure for an agricultural tractor An agricultural tractor includes an axle body and a vehicle substructure. A generally vertical lifting structure is rigidly attached to the vehicle substructure and engages a lifting frame which is adjustable in height. The lifting frame carries coupling ... | 04/11/1995 |
| 5308100 | Trailer coupler assembly A coupling device for coupling a trailer to a vehicle includes a first channel adapted to be connected to the tongue of the trailer and a second channel adapted to be connected to a hitch member. The hitch member is adapted to be connected to the hitch of... | 05/03/1994 |
| 5201539 | Actuating mechanism for a hitch guidance system A hitch guidance mechanism for an agricultural vehicle having a pair of movable draft links for coupling to an implement and having a pair of brackets attached to the rear end of a frame of the vehicle. The brackets are positioned above and on opposite si... | 04/13/1993 |
| 5152545 | Trailer tow bar lift mechanism A lift mechanism is provided for lifting the tow bar of a trailer to facilitate connection of the trailer tow bar to a truck's pintle. In the preferred embodiment the lift mechanism includes a bladder which may be connected to a pneumatic system on the tr... | 10/06/1992 |
