Abstract: A noise-absorbing device for a railway vehicle wheel includes: at least one strip extending radially from a connecting end capable of being fastened to the periphery of the wheel, to a free end; and at least one damping mass fastened on a face of the free end of the strip, away from the connecting end. The strip includes at least two metal or composite layers and at least one layer of viscoelastic material gripped between the two or composite metal layers.

Abstract: This soundproof wheel includes a soundproofing device (3) which is mounted to an inner peripheral surface (6) of a rim section (5) of the wheel. The soundproofing device (3) is provided with: a fixing ring (10) which is fitted in and fixed to a groove (8) formed in the inner peripheral surface (6); a first elastic body section (11A) which is stuck to an outer peripheral surface (10a) of the fixing ring (10), is disposed within the groove (8), and has a plurality of first elastic body pieces; an additional mass section (12) which is stuck to a side of the first elastic body section (11A) opposite to the fixing ring (10), is disposed within the groove (8), and has a plurality of additional mass pieces; and a second elastic body section (11B) which is stuck to a side of the additional mass section (12) opposite to the first elastic body section (11A), is disposed within the groove (8), and has a plurality of second elastic body pieces.

Abstract: A rail wheel with a wheel body and wheel brake discs connected thereto with fastening elements on both sides is designed in such a way that at least in the respective contact regions of the wheel brake discs a mechanically and thermally highly resilient intermediate layer is arranged on the wheel body.

Abstract: In order to reduce torsional vibrations and wheel slip in a wheel set for a rail vehicle the wheel set comprising a pair of wheels connected by an axle is provided with a vibration absorbing device comprising a mass, resiliently mounted on the wheel set and adapted to oscillate at the resonant frequency of torsional vibrations of the wheel/axle system. A method of preventing or reducing torsional vibrations in a wheel set of a rail vehicle is also disclosed, the method comprising determining the resonant frequency of torsional vibrations of the wheel/axle system and resiliently mounting a vibration absorbing device in the form of a mass, on the wheel set, the mass and its resilient mounting being selected to oscillate at or near that resonant frequency.

Abstract: An elastic wheel includes a disk (1) having a base rim (2), a rim (3) for supporting a tire (10), and an annular elastic rubber body (4) arranged between the outer peripheral surface of the base rim (2) and the inner peripheral surface of the rim (3). A gap is formed between the elastic rubber body (4) and the outer peripheral surface of the base rim (2) or the inner peripheral surface of the rim (3). The elastic rubber body (4) with the gap has a spring constant that shifts from a smaller value to a larger value as the input load increases, so that it absorbs vibration under small input conditions while being prevented from undergoing substantial deformation under large input conditions. The elastic wheel ensures riding comfortablesess performance and provides improved vibrationproof performance and soundproof performance, regardless of whether the input load is small or large, without sacrificing durability and safety.

Abstract: A damper plate for an automobile wheel by which ride comfort and interior noise characteristics are improved without seriously deteriorating driving stability or unfastening nuts. The damper plate has a structure in which a metal plate and a buffer member are laminated and is inserted between the automobile wheel and an axle.

Abstract: A railway vehicle wheel always improve damping characteristics when a thin visco-elastic layer is placed between the tire and the connecting disc or ring. The visco-elastic layer improves damping through shearing action and has a thickness that is lower than that of the tire by an order of magnitude.

Abstract: A wheel rim (1) with a circumferential surface (4) has a tire that can be mounted thereon. A sound-absorbing material (6) rests on the wheel rim (1) and is arranged underneath a surface-forming structure (8) extends transversely over the entire width of the sound-absorbing material. A recessed receptacle (5) for the sound-absorbing material (6) is formed in the circumferential surface (4). The upper side (8a) of the surface-forming structure (8) coincides with the predetermined course (7) of the circumferential surface (4).

Abstract: A pneumatic tire, a wheel rim, and an assembly of a pneumatic tire and a wheel rim, which are provided with lawn-like materials for damping air resonance of the tire cavity are disclosed. An assembly of a pneumatic tire and a wheel rim where a foaming agent is injected into the tire cavity is also disclosed.

Abstract: The invention relates to a resilient, multi-component wheel for rail vehicles, comprising a rim (2) and hub (11) as well as an elastic element (6, 8) removably inserted between said rim and hub. Said elastic element (6, 8) is configured as a concentric, separate part consisting of a central disk (7), two larger outer disks (5, 9) and two elastomer rings (6, 8) positioned between said disks. Said elastomer rings (6, 8) are made of a plastic material or rubber, can have different shapes depending on the desired type of compressive stress or shear stress and are connected to the disks (5, 9) in a non-positive manner.

Abstract: An automotive road wheel with improved vibration characteristics comprises a wheel body, and at least one pocket defined in the wheel body for altering a resonant frequency of vibrations of the wheel body. The wheel body is preferably formed of aluminum or a lightweight metal alloy, and includes a rim, a hub, and a plurality of spokes radially connected between the rim and the hub. The pocket is an enclosed space within the wheel body, the wheel preferably includes a plurality of the pockets defined in the spokes, respectively, a vibration damping material may be disposed in some or all of the pockets, and a sheet of vibration damping material may also be disposed concentrically about the rim.

Abstract: A rim and disk type wheel which is mechanically reinforced to raise the fuencies of several of the vibration modes of the wheel to attenuate the running noises heard in the passenger space.

Abstract: A noise damping system for a railroad wheel: at one axial side of the wheel a groove is formed having radially inward and radially outward sides. A ring is installed in the groove. When one set of opposing sides, e.g. the radially outward sides, is engaged, they transmit torque. The ring and the groove are cooperatingly either trapezial in shape, that is one radial side inclined and one axial direction side, or are shaped with both radial sides uninclined. Screws secure the ring into the wheel and establish a torque transmitting connection between their opposing engaged sides. The ring may be in sections fastened together at the wheel to form the complete ring.

Abstract: A muffler for structure-borne noise of running wheels of different diameters and/or different frequency spectrums of structure-borne sound vibrations has vibration absorbing elements in the form of members which are arranged next to one another in the circumferential direction, forming a circular disk, and are each connected on the base surface in a force-locking manner with the running wheel. The muffler for structure-borne noise consists of at least a first type of vibration absorbing elements which is always the same for a larger range of running wheel diameters, and at least a second type of vibration absorbing elements which is adapted to the respective running wheel diameter and frequency spectrum of structure-borne sound vibrations.

Abstract: Polyblock railway wheel of the type comprising a rim (1), a center part (2) constituted by a hub (22) and a web (6), a damper (5) disposed between the center part (2) and the rim (1), at least one flange (3), and fasteners (7) for fixing the at least one flange (3). The rim (1) comprises in its inner part (9) two connection fillets (10,11) located on opposite sides of the plane of symmetry of the wheel and interconnected in their innermost part, by a generally flat annular strip (12). The damper (5) has a tulip-shaped section. It comprises two rings (19,20) each formed by a ring of elastic polymer material inserted between and bonded to an upper metal flank (31) and a lower metal flank (32); the upper metal flank (31) cooperating with the innermost part (9) of the rim (1), and the lower metal flank (32) cooperating with a flange (3,4).

Abstract: In order to obtain, in service, a reduced acoustic emission, the position of the true point of contact (P) of the wheel with the rail is determined, the distribution of the masses of the section of the rim and of the wheel center of the wheel is adjusted so that the point of contact (P), the center of inertia (G1) of the section of the rim and the center of inertia (G2) of the section of the wheel center are located on one and the same straight line (XX') perpendicular to the axis (YY') and the outline of the section of the wheel is adjusted so that the point (P) is a vibration node for the axial vibration modes of the rim. The invention applies particularly to wheels for high-speed trains.

Abstract: Device for attenuating the rolling noise of vehicles, mounted on a component (3) connected to the wheel. The device includes an annular mass (5) coaxial with the wheel shaft (2) and several actuators of the automatically-controlled linear motor type (6 to 8), acting radially between the mass (5)and the component (3). The motors (6 to 8) are variable-reluctance motors. The device also includes elastic members (9) around the shaft (2) and capable of withstanding the static loads exerted between the inertial mass or masses (5) and the said component (3). The actuators and their powering alternators may be housed in the wheel rims.

Abstract: A transit system is provided for application within existing routes of travel infrastructures, travelling along the median strip and utilizing the air space over the median strip and above limited height roadway traffic and beneath overpasses and height limiting infrastructures. The transit vehicles are supported on or side mounted from trucks operating on an elevated structural beam trackway with a lower upwardly facing support surface, an upper downwardly facing support surface, and (on certain vehicles) an upper medially facing support surface. Variations of the structural beam mount under overpasses or along the ground surface, and are used in switching means for secondary trackways. The transit system's vertical dimension is reduced by the interrelationship of the trucks and structural beam trackway with the transit vehicles, and by placing the vehicle to the side of the structural beam and side supporting the vehicle from the trucks.

Abstract: A rotatable machine component with a ring of resilient material secured to it in the vicinity of at least one axially projecting collar. The collar has a continuous annular groove around it that cuts into its contour radially, and the ring is secured in the groove just by snapping into it. The ring and the rotatable component rest loosely against each other, when the component is not rotating, without internal tension in the ring.

Abstract: In a vibration-damping device, viscoelastic material which dissipates vibration energy is bonded to a supporting member so as to form a removable unitary assembly which can be coupled to the vibration emitter, the viscoelastic material being clamped between the supporting member and a stressing element.

Abstract: A noise attenuating assembly for reducing noise levels caused by an endless track assembly during operation of an off-highway implement such as a crawler tractor. The noise attenuating assembly comprises an annular elastomeric ring affixed about an idler wheel on the track assembly. The elastomeric ring is positioned such that pin and bushing assemblies of the track assembly directly and resiliently engage with the periphery of the ring thereby reducing noise as the track assembly rotates about the wheel. A ring retaining assembly which circumferentially extends in recessed relation about the outer periphery of the ring facilitates assemblage of the ring to the idler wheel.

Abstract: A rail vehicle wheel comprises a wheel center (1), a flanged tire (2), a rubber ring (3) between the wheel center and the tire, and a pressure ring (4). The rubber ring consists of an annular, axial body (3') and at each side thereof a flange (3"), which forms an angle of for example 60.degree. with the wheel axis.

Abstract: A device for attenuating sound in and of wheels, the wheel having a rim portion, a hub, and a web in between, there being a radially inwardly oriented flange surface, is improved by an attenuating layer on or in a groove of the flange surface, possibly with an extension against the web, and a cover, radially outwardly, and axially urging the attenuating layer upon the flange and the web.

Abstract: An idler wheel assembly for supporting and guiding an endless track chain assembly of a track-type vehicle includes a spoked idler wheel having a plurality of aligned apertures through the sidewalls. A resilient plug assembly is contained within each set of aligned apertures. A resilient pad isolates each plug assembly from the idler wheel. Conventional spoked idler wheels have a plurality of holes through the sidewalls. These holes collect debris which can damage the idler wheel or other undercarriage components. The subject idler wheel assembly includes resilient plug assemblies to close the apertures and maintain the sound reducing characteristics of the idler wheel assembly.

Abstract: A device for attenuating sound in and of wheels, the wheel having a rim portion, a hub, and a web in between, there being a radially inwardly oriented flange surface, is improved by an attenuating layer on or in a groove of the flange surface, possibly with an extension against the web, and a cover, radially outwardly, and axially urging the attenuating layer upon the flange and the web.

Abstract: A track roller assembly supports and guides a portion of the endless track of a track type vehicle as that portion of the track travels between a drive wheel and an idler wheel of the vehicle. The rim portions of the roller assembly include a plurality of alternating resilient non-metallic rings and metallic rings. The non-metallic rings are compressed between the metallic rings to increase the diameter of the outer walls of the rings. The link rails contact the non-metallic rings only. Conventional track supporting rollers have metallic treads which generate noise and impact against the metal link rails. The rollers often fail to rotate due to insufficient friction with the link rails. The subject roller assembly, with resilient rings in contact with the link rails, generates low levels of noise and vibration and produces sufficient friction to rotate the rollers.

Abstract: An idler wheel assembly for a track-type vehicle has a hub member and a plurality of replaceable wear segments positioned around the circumference of the hub. A plurality of U-shaped grooves in the circumferential surface of the hub receive resilient means. The wear segments also fit within the grooves and hold the resilient means in place. A plurality of clamping members encircle the hub, overlap the wear segments, and clamp the resilient means between the wear segments and the grooves as they are secured to the hub. The wear segments are therefore resiliently isolated from the idler hub. Conventional idler wheels for track-type vehicles have exterior rims which contact the track and guide the track as the vehicle is operated. This contact between the wheel rims an the track produces objectionable noise and vibration. The subject idler wheel assembly generates low levels of noise and vibration by isolating the rims or wear segments from the wheel hub with resilient rings.

Abstract: A disk wheel, especially a railroad wheel, has a composite construction of single piece metal hub and a single piece metal rim connected to each other by a wheel disk of fiber reinforced composite material providing exclusively adhesive bonds. The wheel disk transmits shearing stress between hub and rim. The rim is provided with two radially inwardly extending rim flanges. The hub has two radially outwardly extending hub flanges. The shearing stress transmitting wheel disk (12) has a radially outer rim contacting surface (9) adhesively bonded to the rim (3) and rim flanges (7), and a radially inner hub contacting surface (8) adhesively bonded to the hub (2) and hub flanges (6). The wheel disk (12) is inserted into the space between the concentrically arranged hub and rim as long as the composite material is not yet cured and hence sufficiently deformable. The wheel disk is exposed to compression during curing.

Abstract: A resilient wheel of a railway car includes a hub (1) with an annular projection (2) on the outer surface thereof, and a pressure disk (8), the hub and the disk being connected by bracing elements (7), and having ventilation ports (3, 9). An inner rim (4) having an annular projection (5) on the inner surface thereof is interposed between the hub (1) and the pressure disk (8). The wheel further includes resilient elements (13) some of which are reinforced and disposed between the side surfaces of the pressure disk (8) and the annular projections (2, 5) of the inner rim (4) and hub (1), while one more resilient element is disposed between the hub (1) and the inner surface of the annular projection (5) of the inner rim (4).

Abstract: A rail wheel has in one of its rim surfaces, preferably the inner one, a circumferential undercut groove. Vibration-damping elements are connected to the wheel by means of screws which either engage in the undercut groove via appropriately shaped heads, or are threaded into wedges lodged in the groove.

Abstract: A conductor provides electrical connection passing through a rubber cushioned rail vehicle wheel having rubber elements in between a central metal wheel portion and an outer flanged metal wheel tire. Thus, a length of wire has a central conductor connection tag attached to the central wheel portion with U-shaped spring clips at each end straddling over and electrically connecting with an internal mating ridge on the tire extending between two spaced rubber elements separating the central portion and tire.

Abstract: Method and device for enhancing the adhesion qualities of vehicle wheels through the use of a plurality of embedded members having exposed high frictional surfaces, which are capable of automatically being caused to attain frictional contact with a wheel bearing surface in response to slippage. Under normal conditions where enhanced friction is not needed, the embedded members lie in a relative retracted position from which they may respond to slippage conditions as needed.

Abstract: The running characteristics of a tire for a wheel are improved to provide a more quiet run, by attaching to an inner and/or outer surface of the tire vibration absorbing elements. Vibration absorbing elements may even be inserted into the tire material itself. The vibration absorbing elements are secured to the tire surface in a force and moment or torque transmitting manner by vulcanization or by a suitable adhesive. A strap may hold the individual absorbing elements together or the elements may form integral parts of the strap which is secured to the tire surface, for example, by a rubber vulcanizing operation. The vibration absorber elements may be secured to an inner tube instead of to the tire.

Abstract: In a vibration absorber for resonance vibrations of rotating bodies, in particular rail wheels, comprising several oscillatory plates which establish a damping mass; intermediate layers of damping material separating the plates from each other; a fastener connecting the plates with the rotating body at at least one point and an intermediate layer of damping material coupling the plates over a large remaining area to the rotating body the geometric dimensions of the plates and the intermediate layers and the Shore hardness of the damping material of the intermediate layers is selected such that all plates oscillate at a natural frequency of the rotating body to be damped, but with the amplitudes and phases of the vibrations of the individual plates differing in such a manner, with respect to one another, that the damping material is as strongly distorted as possible.

Abstract: A vibration damping device for a body resonant at two frequencies, is formed by a plate which can be connected to the body transversely with respect to its vibration direction. A post extends from the plate and mounts one end of an elastically flexible tongue which extends from the post substantially parallel to the plate so as to form a space between the tongue and plate. A weight is fixed to the other end of the tongue and vibration damping material is positioned in the space. The tongue and weight form a system resonant at both of the bodies' resonant frequencies, the tongue's energy being absorbed by the damping material.

Abstract: A vibration damping assembly for a wheel or the like that undergoes rotation is achieved by providing an annular groove in a surface of the wheel coaxial with the wheel axis. An annular metal ring formed from a channel member generally U-shaped in cross-section is positioned with one of its legs within the annular groove substantially encased therein by a vibration damping material. The remainder of the channel member extends close to areas of the wheel that are adjacent to the groove, and vibration damping material is sandwiched between the wheel and the channel member. Vibration damping material subject to shear deformation during rotation of the wheel is used, along with vibration damping material subject to deformation in tension and compression.

Abstract: A system comprising a rail wheel and rail has the wheel and preferably also the rail provided with vibration dampers which absorb vibration having the frequency of the radial resonant vibration frequency of the wheel, for the purpose of preventing the formation of ripples in the rail head's surface on which the wheel runs.

Abstract: A vibration absorbing track wheel having one or more different natural frequencies. The wheel body has a wheel flange with one or more resonance absorbers on the wheel flange. Each resonance absorber comprises at least two tongues and an intermediate layer of damping material between each of the two adjacent tongues, and each tongue is turned to a different natural frequency of the wheel.

Abstract: A wheel for rail vehicles with at least one disc which is connected to an axle, and with a wheel rim having a tread or surface surrounding the disc, while the rail tread in engagement with the rim tread results in contacting points of the wheel during straight forward drive of the vehicle located on the tread or track of the rails. At least within that region of the rim which contains the above mentioned rail contacting points of the wheel rim the wheel rim is turnably connected to the disc for turning about an imaginary axis located in about the driving direction of the wheel.

Abstract: A vibration damping assembly for a wheel or the like that undergoes rotation is achieved by providing an annular groove in a surface of the wheel which is coaxial with the axis of the wheel. A viscoelastic damping material subject to shear deformation during rotation of the wheel is positioned within the groove against the surface of the groove, and an annular metal ring is positioned in the groove against the viscoelastic damping material with the damping material sandwiched between the ring and wheel.

Abstract: A resilient wheel is provided comprising a hub and web having a rim mated to and resiliently bonded to the web with an elastomeric adhesive. Depending on the application the outer circumference of the rim may have a flange machined into it so that it serves as the tire for the wheel or machined smooth to accept a separate tire. To prevent the rim from shifting relative to the web as the elastomeric adhesive ages, a plurality of locking pins are inserted through the rim and bond line into the web and bonded into place. The rim is thus effectively prevented from shifting even if the adhesive substantially or even totally disbonds from the mated parts. Several variants of these locking pins are possible to achieve improved economy for maintenance purposes or improved longevity of the wheel.

Abstract: An axle and wheel assembly particularly adapted for railcar usage is disclosed as having a metal-foam construction that is light in weight but of a relatively high strength. The axle includes an elongated hollow steel outer axle member and an elongated hollow steel inner axle member received within the outer axle member with the foam injected therebetween so as to cure and bond to the members and function as a load bearing element therebetween. Adhesion between the axle members and the foam is increased by applying an adhesive to the members prior to the injection of the foam. An intermediate portion of the outer axle member between ends of the axle includes outwardly deformed ribs that increase the cross-sectional area thereof without increasing the weight to enhance the lightweight and high strength characteristics of the axle.

Abstract: The present noise damping apparatus is especially intended for damping the noise caused by wheels running on rails. For this purpose there is provided a noise screen connected to at least one surface of the rail wheel in a force transmitting, yet removable manner. The noise screen comprises vibration damping reed members. This screen prevents noise generated by the wheel proper from radiating outwardly and it also acts as a noise absorber for the impact noise propagating in the wheel and other solid bodies.

Abstract: A truck for a high speed rail vehicle which has a friction bearing between the car body and the truck frame so as to restrain movement of the frame about its vertical axis until the friction between the friction bearing and the truck frame has been overcome. The truck also has axle bearings in the form of mutually inclined surfaces made of material of high stiffness in the normal direction of travel of the truck.

Abstract: A rubber shock-absorbent track wheel in which annular grooves are provided on the ring of the wheel and on the rim of the wheel disc. The grooves are formed between shoulders, and a clearance space is defined between the grooves and the shoulder. Prestressed rubber plates located within the clearance space have plane areas when in the original state. The two annular grooves are turned to one another so that the height of the clearance space varies over its width, and the height of the clearance space is maximum at the centers of the grooves. The rubber plates are more prestressed at their outer areas than in the middle areas of the rubber plates when positioned between the base of the annular grooves of wheel disc and ring.

Abstract: A rubber-suspended railway wheel having a highly-prestressed rubber insert embedded in facing annular grooves formed in the wheel rim and in the wheel tire and wherein, in order to restrict the extent of axial movement between the wheel tire and wheel rim, a shoulder of the annular groove of the wheel rim overlaps a shoulder of the annular groove of the wheel tire.

Abstract: A railway wheel of lightweight construction, having a disc-like wheel body and a tire which is tension-mounted on the wheel rim, and with the wheel disc including a tangential undulating or wavelike configuration of radially extending crests and troughs. In the railway wheel, between an inner annularly extending groove formed in the wheel tire and an outer annular groove formed in the wheel rim, there is provided a pre-tensioned or pre-stressed rubber insert, and in which the wheel disc has a radially unwaved conical basic configuration.