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 |
| 7992887 | Trailer hitch for a vehicle having a single rear wheel A trailer hitch for a single rear wheeled vehicle having a single rear wheel mounted between left and right arms comprises left and right hitch arms having first and second ends. The first ends have first apertures. The second ends are connected together. Shock abso... | 08/09/2011 |
| 7703793 | Fifth wheel hitch assembly Fifth wheel hitch assemblies and fifth wheel hitch adaptors for dampening differential motion between a fifth wheel trailer and a tow vehicle. An upper assembly is formed as a box with an open bottom, and a lower assembly has front, rear, and side plates that extend... | 04/27/2010 |
| 7387308 | Single wheel trailer and stabilizing hitch The single wheel trailer and stabilizing hitch assembly includes a hitch which precludes lateral tilt or roll of a trailer about the longitudinal axis of the towing vehicle and trailer, the trailer having only a single wheel for support. The hitch includes a pair of... | 06/17/2008 |
| 7380811 | Shock absorbing trailer hitch Shock-absorbing trailer hitches each include a mounting member mountable on a towing vehicle; a hitch member which includes a coupler and which is mountable on a towed vehicle and pivotally mounted on the mounting member; and a shock absorbing mechanism for reacting... | 06/03/2008 |
| 7377536 | Shock absorbing trailer hitch Shock-absorbing trailer hitches each include a mounting member mountable on a towing vehicle; a hitch member which includes a coupler and which is mountable on a towed vehicle and pivotally mounted on the mounting member; and a shock absorbing mechanism for reacting... | 05/27/2008 |
| 7338063 | Trailer damping apparatus and trailer utilizing same A damping apparatus for a gooseneck trailer and a gooseneck trailer are provided. The damping apparatus includes an inner shaft and an outer shaft reciprocable about the inner shaft. A first plate is coupled with the outer shaft. A second plate may be coupled with t... | 03/04/2008 |
| 7334357 | Snowplow impact reduction system An improved front hitch assembly is provided for mounting a snowplow to the front of a vehicle. The hitch assembly includes a pair of mounting brackets secured to the vehicle frame, and a pair of receivers releasably connected to the mounting brackets. The plow incl... | 02/26/2008 |
| 7261311 | Fifth wheel hitch assembly with self-locator Typical fifth wheel hitch assemblies require the operator to leave the cab of the vehicle to put the fifth wheel hitch assembly into position to receive a king pin of a trailer. The present invention is a fifth wheel hitch assembly that comprises a base assembly, a ... | 08/28/2007 |
| 7222872 | Hitch damping system A hitch damping system for dampening forces transferred between a towed vehicle and a towing vehicle. The hitch damping system includes a first assembly being designed for being operationally coupled to the towed vehicle. A second assembly is designed for being oper... | 05/29/2007 |
| 7219915 | Trailer ball raising and lowering apparatus A trailer ball raising and lowering apparatus includes vehicle attachment means, a first hitch-support unit connected to the vehicle attachment means, a raisable and lowerable second hitch-support unit, continuously movable first-to-second connector means connected ... | 05/22/2007 |
| 7185906 | Fifth wheel coupling for a towing vehicle A fifth wheel coupling includes a receiver that is suspended from the frame of a towing vehicle by a linkage mechanism to permit limited relative longitudinal and vertical displacement of the towing vehicle and a towed vehicle. The receiver is mounted on a wishbone ... | 03/06/2007 |
| 7152870 | Gooseneck trailer hitch A trailer hitch having an assembly housing that is mounted to the bed of a vehicle, the assembly housing receiving a ball hitch that extends out of the top of the assembly housing, and a torsion bar disposed within the assembly housing to dampen the vibration of the... | 12/26/2006 |
| 7108272 | Trailer hitch cushioning device and method for using same The present invention includes a base frame or hitch receiver which can be attached to the under surface of a pulling vehicle. A hitch frame is pivotally mounted to the base frame for pivotal movement about a horizontal axis. An air bag is positioned between the bas... | 09/19/2006 |
| 7097193 | Gooseneck trailer hitch and method The gooseneck trailer hitch assembly includes a block tube that is fixed to a trailer frame. A top plate is fixed to the block tube. A vertical shaft is connected to the top plate. A steel spherical member is slidably mounted on the vertical shaft. Two rings are cla... | 08/29/2006 |
| 7093845 | Motion absorbing hitch A motion absorbing hitch for dampening forces on a towing vehicle from movement of a trailer assembly towed by the towing vehicle includes a towing attachment assembly coupled to a towing vehicle, a trailer attachment assembly pivotally coupled to the towing attachm... | 08/22/2006 |
| 7040645 | Hitch receiver A trailer hitch assembly including a mounting frame including a tubular receiver readily attachable to a chassis of a towing vehicle and a hitch mount assembly detachably coupled to the tubular receiver for free 360° horizontal rotation therein. ... | 05/09/2006 |
| 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 |
| 7021644 | Towing strap A towing strap has two ends, which may be permanently or releasably attached to an item to be towed. Each strap end which is releasably attached, includes a fastening mechanism, which permits a person to attach towing strap to the item to be towed. The permanent str... | 04/04/2006 |
| 6957825 | Trailer impact suppression apparatus A hitch receiving assembly for connecting a trailer to towing vehicle is disclosed. The hitch receiving assembly includes a first fixed elongate member mountable to a trailer and a second floating hitch receiving member that is separated from the fixed member by a p... | 10/25/2005 |
| 6932375 | Trailer coupling for a work vehicle A trailer coupling for an agricultural or industrial vehicle includes two guide rails which extend vertical and parallel to each other. A support is slidingly received by horizontal extending guide grooves in the guide rails. Different couplers can be mounted on and... | 08/23/2005 |
| 6923460 | Split-frame for heavy trucks A split-frame, heavy truck, suspension system for trucks that haul trailers made of three moveable interlocked rigid frames referred to as the front frame, rear frame, and interconnecting frame. The front frame supports the cab, engine, and transmission. The rear pr... | 08/02/2005 |
| 6913276 | Hitch damping system A hitch damping system for dampening forces transferred between a towed vehicle and a towing vehicle. The hitch damping system includes a first assembly being designed for being operationally coupled to the towed vehicle. A second assembly is designed for being oper... | 07/05/2005 |
| 6908094 | Heavy duty towing hitch A tow hitch having a shell and a draw bar in which the draw bar fits into a channel formed on the shell such that the draw bar may be shifted along the entire length of the channel and either enter or exit on either end of the channel. The shell is adjusted for conn... | 06/21/2005 |
| 6902181 | Trailer hitch having rapid adjustment An adjustable trailer hitch assembly which provides rapid and easy coupling by moving the ball to the tongue, rather than by moving the tongue to the ball. Adjustment is provided in each of three axes. Simultaneous movement in the lateral and vertical directions is ... | 06/07/2005 |
| 6874807 | Coupling device for a handling trolley A coupling device for a handling trolley comprises a drawbar (22) arranged at the front of the trolley and designed to co-operate with the hook (24) provided at the back of a tractor, in particular a trolley preceding a line of trolleys. The drawbar ( | 04/05/2005 |
| 6834879 | Elastomerically isolated tow hitch drawbar A damped drawbar for use in towing a drawn trailer that provides for the attenuation of noise, shock, and vibration that may be conducted into the towing vehicle. The newly designed drawbar uses a resilient elastomer, operating in shear, sandwiched between an outer ... | 12/28/2004 |
| 6766876 | Rear wheel suspension system in vehicle A rear wheel suspension system for a four-wheeled vehicle suitable for attaining vehicle weight reduction, setting weight distribution of the vehicle, improving vehicle design freedom, and decreasing the number of components as compared to conventional rear wheel su... | 07/27/2004 |
| 6761238 | Vehicle body structure of tricycle A joint case includes a flange, a joint shaft extending from the flange, and a case main body fitted to the joint shaft. The flange is fitted to a rear portion of a front vehicle body, whereas the side of the case main body of the joint case is fitted to a rear vehi... | 07/13/2004 |
| 6722684 | Trailer hitch and associated methods A trailer hitch that is capable of measuring or sensing the weight of trailer coupled thereto, or “tongue weight” is disclosed and described. In one aspect, the trailer hitch may include a ball slidably coupled to a post member and fastened thereto with a fasten... | 04/20/2004 |
| 6601867 | Breakaway coupler assembly A trailer having a tongue that defines a longitudinal axis and includes a coupler portion. The coupler portion of the tongue can pivot relative to the longitudinal axis, thereby forming an angle between the coupler portion and the longitudinal axis. In a ... | 08/05/2003 |
| 6581953 | Trailer hitch assembly and method for connecting a tractor vehicle and a trailer vehicle with force dampening capabilities A trailer hitch uses a draw bar to interconnect tractor and trailer vehicles. The draw bar includes an elongated shank with a transverse throughway. A resilient cushion is disposed in the throughway. A passageway is associated with the throughway to recei... | 06/24/2003 |
| 6494478 | Force responsive trailer hitch A trailer hitch apparatus (10) for dampening shocks and surges between a towing vehicle (2) and a trailer (1) is disclosed. The hitch apparatus (10) includes a draw bar (20) for removably coupling to a towing vehicle (2), a hitch ball assembly (16) for co... | 12/17/2002 |
| 6481739 | Docking assembly A docking assembly configured to allow a first medical device to move with a second medical device includes a hitch, a base, and a connector. The hitch is configured to be coupled to the first medical device. The base is spaced apart from the hitch and is... | 11/19/2002 |
| 6354615 | Vehicle having a torsional suspension and torsional joint An articulating vehicle (10) includes a front axle (21) operatively connected to a front frame (40) and a rear axle (21) is operatively connected to the rear frame (30). A torsional joint (50) has an inner shaft member (51) operatively connected one of th... | 03/12/2002 |
| 6276721 | Pivoting seat belt upper anchor point attachment A three-point passenger restraint system for a passenger seat including a lap belt having a first end connected to a lap belt retractor and a second end. A torso belt having a first end connected to the second end of the lap belt and a second end. The sec... | 08/21/2001 |
| 6220618 | Translatable trailer hitch A Trailer hitch for towing a four wheeled vehicle. The hitch has a fixed in place portion attached to the towing vehicle and a translatable portion attached to the vehicle being towed. The translatable portion is spring biased to a center position. A damp... | 04/24/2001 |
| 6142500 | Adjustable, weight distributing trailer hitch apparatus with spring dampening assembly A weight distributing hitch apparatus includes a drawbar assembly, which is interconnected to a tow vehicle and includes an elongate bar and a component that is pivotally interconnected and angularly adjustable relative to the bar. A hitch head assembly i... | 11/07/2000 |
| 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 |
| 5975553 | Height adjustable coupling device with vertical cushioning An improved coupling device for connecting a towed vehicle and a towing vehicle, and includes a draw bar that is adapted to be affixed to the towing vehicle, a tube support structure connected to a distal end of the draw bar, and a tube that is movably co... | 11/02/1999 |
| 5947503 | Fifth-wheel trailer connector An apparatus for acting as a shock absorber for a truck towing a vehicle mated with a fifth-wheel, or a gooseneck, hitch. A fifth-wheel, or gooseneck, trailer has members extending away from the trailer bed and converging. A cylindrical housing, having a ... | 09/07/1999 |