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| Number | Title | Issue Date |
| 8104409 | Rail car suspension damping A freight rail car suspension has independent but co-operating springs; a first spring is load carrying and has a variable damping function and a second control spring operates on a friction shoe to apply a constant damping component. A practical embodiment has a fr... | 01/31/2012 |
| 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 |
| 7263930 | Railway truck suspension design A tuned spring group with load springs, control springs, and a frictional damping arrangement for a railcar truck assembly provides better ride quality, increased resistance to suspension bottoming, and increased hunting threshold speed of a railroad car. Specifical... | 09/04/2007 |
| 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 |
| 7023949 | Jet pump assembly repair method A BWR jet pump assembly has a wedge slidably mounted on a jet pump that is movable under the force of gravity to seat between a bracket and the jet pump in order to horizontally support the jet pump against vibrations. The wedge or the bracket is repaired in situ by... | 04/04/2006 |
| 7017498 | Multi-purpose universal sideframe for railway trucks An improved sideframe has a bolster opening configured to accept a variety of spring group and friction shoe assembly designs. The bolster opening is defined by a bottom section, a top compression member, and two opposing column members and has two column wear plate... | 03/28/2006 |
| 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 |
| 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 |
| 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 |
| 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 |
| 5524551 | Spring-pack assembly for a railway truck bolster assembly A variable spring group for a railcar wheel truck assembly, which spring group has independent variable rate control springs for biasing snubber assemblies of a bolster in the wheel truck assembly, with the spring group having a first linear spring rate a... | 06/11/1996 |
| 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 |
| 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 |
| 5046431 | Railway truck A railway truck assembly having a bolster and side frames with a novel arrangement of solid lateral stops which limit movement of the bolster ends with respect to the side frames of the truck, the novel lateral stops also accommodating an improved column ... | 09/10/1991 |
| 4986192 | Railway truck bolster friction assembly A railway truck and more particularly a truck including a variable bias bolster friction assembly having an elongated retention spring which extends preferably between a side frame spring seat and an inner end portion of a downwardly opening spring pocket... | 01/22/1991 |
| 4974521 | Friction casting for a bolster pocket A friction wedge for use in a railroad car truck bolster pocket which has a slanted rear wall and adjoining side walls perpendicular thereto, one surface thereof adapted to bear against a portion of a car truck side frame and a slanted surface and adjoini... | 12/04/1990 |
| 4953471 | Friction shoe assembly for repair of worn railway truck A method of repairing railway trucks in which the sloped surfaces of the truck bolster ends have become worn during service is provided that avoids the hetertofore required restoring of the sloped surfaces with weld material. An improved replacement frict... | 09/04/1990 |
| 4512261 | Self-steering railway truck A railway truck having a suspension wherein pivotal suspension links are connected between the pedestal openings of a truck side frame and the bearing adaptor of the bearing received within the respective pedestal opening to suspend the side frame with re... | 04/23/1985 |
| 4491075 | Snubbed railway car truck A snubbed railway car truck including a side frame having a bolster opening defined by a pair of columns. A bolster end is disposed in the bolster opening. Resiliently biased friction shoes are provided with friction faces which engage friction faces of w... | 01/01/1985 |
| 4426934 | Friction casting bolster pocket wear plate having a plurality of sides A railroad car truck bolster has a plurality of pockets each of which will position a friction wedge for use in damping motion between the bolster and the side frame. Each pocket has a slanted rear wall and adjoining side walls perpendicular thereto, the ... | 01/24/1984 |
| 4295429 | Railway truck bolster friction assembly A railway freight truck bolster friction assembly and more particularly improved friction assemblies of elastomeric material which are adapted to be captively retained intermediate an axial end portion of a boltster member and an adjacent side frame.... | 10/20/1981 |
| 4265182 | Damping railway car truck In a railway car truck a lower transom extends between transversely spaced side frames. The side frames include depressed portions having transversely aligned vertical openings or slots which receive spring groups. A bolster including a center connection ... | 05/05/1981 |
| 4256041 | Damping railway truck friction shoe An improved railway truck friction shoe is provided. The contact point of the shoe slope face with the bolster and the spring center line of the shoe are substantially coincident; the contact point is substantially equidistant from the top and bottom edge... | 03/17/1981 |
| 4254713 | Damping railway truck friction shoe A friction shoe is provided for use in a railway truck. The shoe is placed such that it frictionally engages both a side frame vertical column and the slope surface of the bolster to dampen the oscillating motion of the bolster in the side frame. The shoe... | 03/10/1981 |
| 4244298 | Freight car truck assembly Wedges of novel design are interposed between the side frames and bolster of a three-piece freight car truck assembly in an effort to provide an assembly having greater high speed stability.... | 01/13/1981 |
| 4230047 | Railway truck bolster friction assembly A railway freight truck bolster friction assembly and more particularly improved friction assemblies of elastomeric material which are adapted to be captively retained intermediate an axial end portion of a bolster member and an adjacent side frame.... | 10/28/1980 |
| 4179995 | Snubbed railroad car truck A truck for a railroad car includes two spaced side frames which resiliently support ends of a transversely positioned bolster in a window formed in each side frame. On each side of the bolster is a vertical recess formed having opposing convex-shaped sid... | 12/25/1979 |
| 4167907 | Railway car truck friction damper assembly A three-piece dampener assembly provides means to depress vertical and horizontal oscillations between ends of a bolster of a railroad car truck and side frames of the truck. This assembly includes a control or friction shoe having an outer vertical engag... | 09/18/1979 |
| 4109585 | Frictionally snubbed railway car truck A winged friction shoe is provided to frictionally engage both the side frame column and bolster in order to control the oscillating movement of the latter. The wings of the friction shoe are formed with a surface which is inclined with respect to the sur... | 08/29/1978 |
| 4103623 | Squaring frictionally snubbed railway car truck A friction shoe is provided on a railway car truck to frictionally engage both the side frame column and bolster in order to control the oscillating movement of the latter. The interfaces between the friction shoe and its reaction surfaces on the side fra... | 08/01/1978 |
| 4084514 | Damping railway truck bolster friction shoe A friction member for use in the bolster pocket of a stabilized railroad car truck has a slanted friction surface adapted to bear against the bolster within the bolster pocket and a vertical friction surface adapted to bear against the side frame. The sla... | 04/18/1978 |
| 4084513 | Railroad car side frame construction A railroad truck side frame includes spaced tension and compression members connected by vertical columns. The tension and compression members, as well as the vertical columns, define a window and there is a bolster extending through the window. One side ... | 04/18/1978 |
| 3977332 | Variably damped truck A stabilized railroad car truck has a side frame with a window, a bolster extending into the window, a stabilizer pocket on each side of the bolster and a friction element in each pocket. The spring means constitute coaxially positioned spring assemblies ... | 08/31/1976 |
