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| Number | Title | Issue Date |
| 8136456 | Friction wedge for railroad car truck A single-piece friction wedge for use in damping relative movement between a bolster and a side frame of a railroad car truck includes a generally horizontal bottom surface, a generally vertical front surface, and a back surface oriented at an acute primary angle wi... | 03/20/2012 |
| 7798069 | Suspension for a rail vehicle A suspension for a rail vehicle includes a bogie pedestal 10, an axle box 11 and suspension springs 16, 18 and 19 arranged such that the axle box supports load exerted on the pedestal via the springs. The suspension includes a pair of wed... | 09/21/2010 |
| 7571684 | Rail road freight car with damped suspension An auto rack rail road freight car is provided for carrying low density, relatively high value, relatively fragile lading. The car has trucks that have multiple dampers in a four corner arrangement in the sideframes. The dampers may include damper wedges having prim... | 08/11/2009 |
| 7328659 | Rail road freight car with resilient suspension An auto rack rail road freight car is provided for carrying low density, relatively high value, relatively fragile lading. The car has a relatively soft suspension and an empty vertical bounce natural frequency of less than 2.0 Hz. The car also has additional ballas... | 02/12/2008 |
| 7267059 | Rail road freight car with damped suspension An auto rack rail road freight car is provided for carrying low density, relatively high value, relatively fragile lading. The car has trucks that have multiple dampers in a four corner arrangement in the sideframes. The dampers may include damper wedges having prim... | 09/11/2007 |
| 7263931 | Rail road car and truck therefor A rail road car truck has side frames mounted to rock on the wheelsets. A bolster is mounted cross-wise on the sideframes, each end of the bolster being seated on a spring group, each spring group being seated in one of the sideframe windows. The bolster has damper ... | 09/04/2007 |
| 7255048 | Rail road car truck with rocking sideframe A swing motion rail road freight car truck is provided that does not have lateral underslung cross bracing in the nature of a transom, a frame brace, or lateral rods. The truck has a truck bolster and a pair of side frames, the truck bolster being mounted transverse... | 08/14/2007 |
| 7174837 | Three-piece motion control truck system An improved three-piece truck system for railroad cars provides long travel side bearings for improved stability, a “wide” friction shoe design or equivalent to improve sideframe and bolster squareness, a resilient pedestal pad for improved curving performance a... | 02/13/2007 |
| 7004079 | Rail road car and truck therefor An autorack rail road car is provided with a truck that includes a pair of sideframes supported on wheel sets with bearing adapters positioned therebetween. The bearing adapters and the sideframes have associated parts or surfaces with curvatures configured to permi... | 02/28/2006 |
| 6971319 | Friction wedge with mechanical bonding matrix augmented composition liner material A friction wedge assembly for use in a suspension system of railroad car trucks. The friction wedge assembly comprises a cast metal wedge having a bolster engaging surface, a truck side frame engaging surface and a surface disposed between the bolster engaging surfa... | 12/06/2005 |
| 6920828 | Rail road freight car with resilient suspension An auto rack rail road freight car is provided for carrying low density, relatively high value, relatively fragile lading. The car has a relatively soft suspension and an empty vertical bounce natural frequency of less than 2.0 Hz. The car also has additional ballas... | 07/26/2005 |
| 6895866 | Rail road freight car with damped suspension An auto rack rail road freight car is provided for carrying low density, relatively high value, relatively fragile lading. The car has trucks that have multiple dampers in a four corner arrangement in the sideframes. The spring groups in the side frames are relative... | 05/24/2005 |
| 6691625 | Friction wedge for a railroad car truck having a replaceable wear member A friction wedge for a railroad car truck including a body and a wear member. The body includes a front face having a pocket adapted to removably receive the wear member. The pocket includes a bottom wall and a peripheral side wall extending outwardly fro... | 02/17/2004 |
| 6688236 | Friction wedge design optimized for high warp friction moment and low damping force A damping system for a rail car truck utilizes friction wedges supported on side springs to damp relative movement between the rail car truck bolster and the side frames supporting it. Each friction wedge has a generally triangular shape with an angle θ ... | 02/10/2004 |
| 6425334 | Friction shoe for freight car truck A friction shoe is provided for use in a railway freight car truck. A freight car truck comprises two laterally spaced sideframes with a bolster extending transversely between said sideframes. The bolster has two ends each of which extends into an opening... | 07/30/2002 |
| 6269752 | Friction wedge design optimized for high warp friction moment and low damping force A damping system for a rail car truck utilizes friction wedges supported on side springs to damp relative movement between the rail car truck bolster and the side frames supporting it. Each friction wedge has a generally triangular shape with an angle θ ... | 08/07/2001 |
| 6250232 | Running gear for a rail vehicle A running gear for a rail vehicle having sprung longitudinal members of plastic, connected to one another by means of a cross-member structure and at their free ends to axle-boxes for rail wheels. In order to obtain optimal stability of the wheelset guida... | 06/26/2001 |
| 5943961 | Split wedge bolster pocket insert In a freight car truck assembly, an insert for converting a substantially flat, inclined, bolster pocket back wall into a pair of inclined surfaces for biasing a pair of split wedges laterally outwardly against side walls of the bolster pocket to create a... | 08/31/1999 |
| 5875721 | Railway car truck and method and apparatus for velocity-dependent friction damping Viscous damping such as provided by hydraulic dampers is employed to load frictional energy dissipating elements, such as friction wedges used to damp relative movements between the bolster and the side frames in a conventional railway car truck, such tha... | 03/02/1999 |
| 5850795 | Rail car truck damping system A rail car truck damping system includes a bolster with a bolster pocket having an interior slanted wall, a side frame having a column wear resistant surface facing said pocket and a friction wedge positioned within the pocket. The wedge has a body with a... | 12/22/1998 |
| 5555817 | Pad of substantially rigid synthetic resin for a friction wedge in a bolster pocket A novel friction wedge for use in a bolster pocket of a truck of a railroad car, comprises a metal body portion having a vertical wall and one or more pad members supported on the surface of a pad-support body. The metal body portion has a vertical wall t... | 09/17/1996 |
| 5555818 | Dual face friction wedge A friction wedge for use in damping relative movement between the bolster and the side frame of a railroad car truck includes a body formed and adapted to be positioned in a pocket of one of the bolster and side frame. The body has spaced body portions in... | 09/17/1996 |
| 5511489 | Dual face friction wedge A friction wedge for use in damping relative movement between the bolster and the side frame of a railroad car truck includes a body formed and adapted to be positioned in a pocket of one of the bolster and side frame. The body has spaced body portions in... | 04/30/1996 |
| 5452665 | Bolster friction shoe pocket with relieved outer wall A railway vehicle truck bolster friction shoe pocket includes a sloped rear wall and longitudinally spaced sidewalls depending from the rear wall to form a friction shoe pocket having open top and bottom ends for receiving a variable rate type of friction... | 09/26/1995 |
| 5331902 | Truck boltser with laterally wider friction show pocket and mechanism for lateral travel of the friction shoe Prior art railcar bolsters and friction shoe assemblies were constructed such that the friction shoe was tightly restrained within the friction shoe pocket. The present invention utilizes a friction shoe sled for promoting lateral sliding of the friction ... | 07/26/1994 |
| 5239932 | Force dampening mechanism of a railroad car truck A new improved mechanism is described for dampening forces between the sideframes and bolster of a railroad car truck or bogie. The mechanism comprises a pair of triangularly shaped wedges which are positioned between a pair of wear plates carried by each... | 08/31/1993 |
| 5176083 | Railroad car truck damping member with open cavity and support rib construction A friction casting for use in a railroad car truck between a side frame column and a bolster pocket slanted wall has a slanted wall to face and be in contact with the bolster pocket slanted wall and a vertical face in contact with the side frame column. T... | 01/05/1993 |
| 5095823 | Friction shoe for railcar truck The present invention provides a friction shoe for use in a railway freight car truck. The friction shoe is disposed to dampen movements between the truck bolster and the side frames, and consists of a unitarily cast metal body having a generally planar v... | 03/17/1992 |
| 5086708 | Railcar truck bolster with immobilized friction shoes Friction shoes are immobilized within the pockets of a railcar truck bolster by threaded pins that are inserted through apertures in the pocket walls and friction shoes and guided into the inboard pocket wall apertures by a concentric tapered surface with... | 02/11/1992 |
| 5072673 | Bogie with a deformable underframe including an oblique faced friction wedge and direct engagement between bolster and side-frame The bogie has two side-frames. Each side-frame has an opening in which a respective end of a bolster bar rests upon the side-frame by way of suspension springs. Two wedges, themselves supported by springs and having an oblique face which is thereby presse... | 12/17/1991 |
| 4915031 | Railway truck damping assembly A railway truck assembly provides sprung support of a car body with respect to the truck wheels by means of compression springs interposed between axle carried supports such as truck side frames and a car body support such as a bolster, wherein biased fri... | 04/10/1990 |
| 4771704 | Damping device in a bogie for a railbound vehicle A damping device in a bogie of a railbound freight car has good ride properties independent of the load carried by the car by making the damping device with friction wedges of triangular cross-section, an upper surface of which confronts an adjoining load... | 09/20/1988 |
| 4760799 | Lightweight railway vehicle truck A railway vehicle truck in which the framing consists of sideframes resiliently supported at their ends on the axle bearings and a main frame supported on the sideframes by flat elastomeric pad devices inclined longitudinally of the truck and located at a... | 08/02/1988 |
| 4574708 | Damping mechanism for a truck assembly A damping mechanism for a truck assembly employing a resiliently mounted wedge to cooperate with a bolster in a manner to prevent wear. The damping assembly is biased outwardly and a friction plate employed between the wedge and bolster, further reducing ... | 03/11/1986 |
| 4363276 | Railroad car truck side frame - bolster connection A railroad car truck may be assembled by spacing a pair of side frames to which is connected a transversely positioned bolster. End portions of the bolster are located within a window formed in a middle portion of each side frame to form a connection ther... | 12/14/1982 |
| 4244297 | Articulated railway car trucks An articulated railway truck assembly is provided with a pair of side frames, a transverse center support structure and a pair of wheelset swiveling assemblies. An inward portion of each of the wheelset swiveling assemblies is supported by either the side... | 01/13/1981 |
| 4109586 | Universally suspended snubbing railway axle truck This invention provides a railway wagon suspension unit comprising a frame mounted over a saddle accommodating an axle journal housing. The saddle can rock laterally relative to the journal housing. Suspension means are disposed between the frame and the ... | 08/29/1978 |
| 4003316 | Articulated railway car trucks An articulated railway truck assembly is provided with two wheelset assemblies, each of which is attached for pivotal movement about a pivot near the center of the truck frame assembly and each of which extends beneath the respective adjacent ends of the ... | 01/18/1977 |
| 4003318 | Reinforced bolster pocket wall A bolster for use in a stabilized railroad car truck has stabilizer pockets on each side of each end. Portions of the bolster adjacent the pockets extend above the bolster top wall. There are reinforcing means for each bolster pocket positioned generally ... | 01/18/1977 |
| 3944196 | Recoil spring housing assembly A recoil assembly for track type vehicle includes a housing having a preloaded spring assembly mounted therein. The housing is an open sided housing having a pair of ends with aligned apertures formed therein. The spring assembly includes a pair of spaced... | 03/16/1976 |
