Abstract: To prevent a shock absorbing material mounted on a vehicle body from collapsing or being scattered under the shock at the time of a collision. The four sides of a shock absorbing material formed of a foamed material are surrounded by a bellows form cover consisting of four corrugated plates inclusive of corrugated plates. Under an external force due to collision, the bellows is folded and contracted easily, but is difficult to be deformed in the width directions. Therefore, the shock absorbing material receives the energy upon collision in its initial shape, so that the energy is absorbed substantially by the compression of the shock absorbing material. Accordingly, it suffices to design a set load for the shock absorbing material by taking into account only the shock absorbing material, so that it is easy to design the shape, material and the like of the shock absorbing material.

Abstract: A protective bumper structure for the exterior surface of tugboats or towboats. The protective bumper includes a backing member for supporting the bumper to the boat, a resilient cushion layer supported on the backing member and a protective face supported on the resilient cushion. The protective face is formed of a durable low friction material and is provided in the form of plural segments, such as spaced elongated strips extending along the length of the resilient cushion. The protective face provides an engagement surface for engaging a cooperating surface on a barge.

Abstract: A protective apparatus for covering bolts and gussets of a mounting base of an in-ground anchoring system for a basketball goal post includes a shell formed of a resiliently deformable material. The shell includes a top wall defining a post opening configured to receive the goal post therethrough and at least one side wall integral with the top wall. The top wall and side walls define a cavity for enclosing the protruding features of the mounting base when the post is received in the opening of the top wall. An access opening is provided through which the goal post is maneuvered into the post opening. The access opening can be in the form of a slot or a closeable slit in the shell. In certain embodiments, a retention element is provided that attaches to the bolts of the mounting base to hold the protective apparatus in position.

Abstract: A protective bumper or guard having a substantial thickness of semi-rigid material formed in a geometric configuration, such as a dome, which will not catch or snag personnel or garments moving about structures such as posts having jagged edges or points. The protective bumper or guard incorporates a downwardly depending shaft having one end exposed in the form of a wedge for insertion between crimped portions of the damaged structure, while the opposite end of the shaft includes a head for retaining the shaft in a secured fitting with the semi-rigid pad or body. Preferably, the semi-rigid pad or body is dome-shaped, having a flat bottom, whereby sharp edges and points of damaged structure can impact or slightly penetrate into the material when the wedge has been inserted into the crimped closing of the post or structure. A sufficient portion of the pad or body exists between the secured portion of the shaft with the body so that a person engaging the pad will not feel or snag on the shaft.

Abstract: Disclosed is a vibration damping bushing comprising: an inner and outer sleeve fixable to a first and a second component, respectively; an elastic body having a tubular main body portion interposed between the inner and outer sleeves and a pair of flange portions integrally formed at axial end portions of the main body portion, which extends radially outwardly and is laminated on axial end faces of the outer sleeve; and a deformation resistant portion provided for at least one flange portion over a given circumferential length, projecting axially outwardly to be opposed to a member of the first component with a spacing therebetween. Due to radial compressive deformation of the main body portion, the flange portion undergoes elastic deformation toward the member of the first component so that the deformation resistant portion comes into contact with the member of the first component to increase resistance to the radial compressive deformation of the main body portion.

Abstract: A vibration isolation device is disclosed. More specifically the vibration isolation device of the present invention comprises a fuse for decreasing the mount stiffness when loads above a threshold load value are applied to the device. The fuse for decreasing the mount stiffness comprises a shear pin with shear locations that comprise annular grooves with semielliptical cross sections.

Abstract: A vibration-reducing system for use with a data processing apparatus is provided. The data processing apparatus includes a data access apparatus. The vibration-reducing system includes at least one first elastic element and at least one second elastic element, and the elastic modulus of the second elastic element is smaller than the elastic modulus of the first elastic element. The first elastic element connects the data access apparatus to the data processing apparatus, and the second elastic element is disposed between the data processing apparatus and the data access apparatus. A part of impact energy is removed from the data access apparatus by using the difference between the elastic modulus of the first and the second elastic elements.

Abstract: A lock and dam system for a waterway includes a dam extending across the waterway, a channel having a first entry-exit opening on a first side of the dam and a second entry-exit opening on a second side of the dam. The channel includes a lock. The system further includes a fascia proximate first entry-exit opening in the channel, and a fender system to protect the fascia from impact. The fender system includes a plurality of resilient flexible support element, a first panel supported by a first one of the plurality of support elements in front of the fascia and a second panel supported by a second one of the plurality of support elements in front of the fascia. The first and second panels overlap in a first direction parallel to the fascia and a second direction perpendicular to the fascia. In one exemplary embodiment, the first panel has a first shoulder and the second panel has a first step facing and overlapping the first shoulder.

Abstract: A fender protective structure having an inner layer of resilient plastic/elastomer alloy having a delayed elastic response, having voids to reduce weight and allow the inner layer to expand upon impact. A relatively hard top layer is also provided.

Abstract: A modular shock isolator and method of isolation of components of a system with multiple modular shock isolators arranged to provide different damping and vibration characteristics than an individual modular shock isolator. In one mode, a modular shock isolator having a base with legs extending from each side of the base with each of the legs having a foot that extends outward from the legs with the modular shock isolator either individually mounted to isolate a component or a plurality of modular shock isolators are be ganged, or stacked together to change the shock isolation characteristics of the shock mount formed from the multiple modular shock isolators. A layer of damping material can be sandwiched between layers of elastomers to dampen the natural spring-back of the materials.

Abstract: A vibration damper of composite type including a vulcanized-rubber body formed of a vulcanized rubber material and a polyamide-resin member formed of a polyamide resin material. The vulcanized-rubber body and the polyamide-resin member are integrally bonded together, and the exposed surface of at least the polyamide-resin member is covered by a coating layer formed of an elastic material with a predetermined thickness. Also disclosed is a method suitable for producing the vibration damper, wherein a solution of an unvulcanized rubber material or a thermoplastic elastomer is applied to the exposed surface of at least the polyamide-resin member, and is subjected to a vulcanizing or drying operation to form the coating layer.

Abstract: In accordance with the present invention, an elevator noise and vibration isolation system is provided. The system includes an elevator component, a second component, and at least one vibration isolator being positioned between the elevator component and the second component. Each vibration isolator has a plurality of layers with at least one layer being a hard layer and a second layer being a soft layer. The system may be used to isolate noise and vibration. Components which may have at least one vibration isolator include a slide guide, a roller guide, the cab steadying system, the rope hitch system, and the sheaves.

Abstract: A system for isolating wall hung equipment from shock and vibration including a wall mountable support or fixture having a first member for securing to a wall and a second member for securing to equipment with a plurality of triad elastomers mounted therebetween to cantileverly support the equipment and at the same time isolate the equipment from shock and vibration. The elastomer mounts while permitting displacement of the members with respect to one another inhibit the members from contacting each other when one or the other is subject to shock or vibration.

Abstract: An elastomeric mounting suitable for use in the suspension of an off-road vehicle comprises two rigid end members (11, 12) maintained spaced apart by an intervening tubular body (13) of elastomeric material which defines a central chamber (26), a connecting member (36) arranged to extend through the central chamber to interconnect the end members (11, 12) and serve at least to resist more than a predetermined separation of the end members, and buff member (37) provided to act in series with the connecting member (36) at a position between said connecting member and one (12) of the rigid end members thereby to cushion the transmission of force between the end members when the connecting member is loaded in tension.

Abstract: A device for absorbing vibration is disclosed, along with compensator elements for use therein. The device comprises a primary fluid system for dynamic isolation and/or damping, and a volume compensator having an auxiliary chamber fluidly interconnected with, but dynamically isolated from, the primary fluid system. The volume compensator features a compensator element having an elastic layer in fluid communication with the auxiliary chamber and disposed in sealing engagement within the device. The compensator element advantageously comprises a deformable elastomer stiffener cooperative with the elastic layer for providing static pressurization to the primary fluid system. The compensator element may further provide a reduced rate of change in volume stiffness characteristic that allows the fluid pressure in the primary fluid system to increase at a reduced rate. Further, the reduced rate characteristic prevents excessive static pressure swings. The compensator element may further comprise a seal bead.

Abstract: In a side bearing pad assembly two housings are provided, each having a bore of such size and orientation that the housings slide telescopically one within the other. When assembled the bores constitute a single internal cavity which houses resilient members. Each housing is mounted onto a load bearing member. The biasing resilient members urge the load bearing members apart when a compressive load is imposed on either of such members. The resilient members respond in a non-linear manner to force exerted on them.

Abstract: An elongate or continuous fender having a surface mounting meeting portion and a conjoined fendering body. The meeting portion includes one or more elongate or continuous mounting pieces located alongside the fendering body to create upper and lower shoulders. The shoulders provide one part of a two part fastening with a surface mounting. The mounting piece can be an elongate strip. The fender and surface mounting together form a suitable impact-energy absorbing assembly. The form and shape of the fender provide a secure method of attaching such fenders to a supporting surface without affecting the fendering properties.

Abstract: A flexural pivot assembly which reduces the number of component parts to five and reduces the number of operations in the manufacturing process is disclosed. The component parts include two sleeves, one inner flexure, one outer flexure, and one slotted tubular core that may be coated with a suitable bonding material. The core has a slotted end and an unslotted end and includes two pairs of diametrically opposed flexure slots each having substantially the same length as a side of a flexure so that the interlocked flexures can slide into the slotted end of the tubular core until they abut an end of the flexure slots and, at the same time, be positioned flush with the slotted end. The core further includes a pair of diametrically opposed travel slots.

Abstract: A vibration-isolating apparatus and a metal stopper having an excellent and lasting reliability comprises an outwardly projecting stopper rubber, and a metal stopper fixed to a first fixture so as to surround the stopper rubber. The metal stopper has a first contact surface in parallel with a compression-direction-facing surface of the stopper rubber, a second contact surface in parallel with a radial-direction-facing surface of the stopper rubber and a third contact surface in parallel with a drawing-direction-facing surface of the stopper rubber, and a fourth contact surface in parallel with a circumferential-direction-facing surface of the stopper rubber. The third contact surface inclines at an angle range of 10°-50° with respect to a plane perpendicular to the compression and drawing directions, while an inner edge of the third contact surface projects radially inward from the second contact surface by not less than 10 mm so as not to contact with the vibration-isolating base body.

Abstract: The lock and dam system for waterway includes a dam extending across the waterway, the channel having a first entry-exit opening on a first side of the dam and a second entry-exit opening on the second side of the dam. The channel includes a lock. The system further includes a fascia approximate first entry-exit opening in the channel, and a fender system to protect the fascia from impact with objects generally moving in a first direction. The system includes a first panel, a second panel, a first support element coupled to one of the first and second panels and coupled to the at least one fascia and a second support element coupled to one of the first and second panels and coupled to the at least one fascia. The first support element extends oblique to said one of the first and second support panels with the second support element extends oblique to said one of the first and second panel.

Abstract: A bump stopper for elastically limiting an amount of operation of a suspension system of a vehicle, including a rigid holding member which includes a hollow holding portion opening toward the other suspension member, a spring member which is formed of a foamed elastic material and which includes a base end portion held by the hollow holding portion of the holding member and also includes a free end portion projecting away from the holding portion toward the other suspension member, and a stopper rubber which projects from an end surface of the hollow holding portion of the holding member toward the other suspension member such that a free end surface of the stopper rubber is more distant from the other suspension member than a free end surface of the spring member.

Abstract: A chair height control mechanism has a gas cylinder with a valve control finger extending from an upper end overlain by a tilting actuator. A resilient pad is adhered to the upper end of the gas cylinder surrounding the valve control finger and maintains a spacing between the valve control finger and actuator when the actuator is not in use to avoid rattle.

Abstract: A marine fender for securely affixing to an object such as a dock, piling, seawall, and the like is formed by extrusion of a resilient material. It is provided with unique energy absorbing properties. The fender has a uniform cross section with an outer arcuate wall, and an inner arcuate wall. Strips connect the two walls to transmit forces from items impinging on the outer wall to the smaller arch of the inner wall. A planar panel connects the two walls and transmits any remaining forces to the object on which the fender is mounted. Flanges coextensive with the outer wall enable the fender to be securely affixed to the object.

Abstract: A fender integrally made of a rubber material, including a first bumper member of a cylindrical shape and a second bumper member of a hollow conical shape, the fender further including at least one of:

Abstract: The disclosed invention is directed toward an improved airspring bumper (20) and an airspring (10) comprising the improved bumper (20). The bumper (20) is defined by a dual reinforcing structure comprising concentric sets of ribs (50, 58) for absorbing and distributing loads generated from contact between the bumper (20) and an opposing retainer (16). The bumper (20) is secured to one of the airspring retainers (18) by a compression fit between the retainer (18) and the bumper (20) or by a central barbed post (36).

Abstract: The present invention relates to a bumper device which is to be mounted on a stationary object to absorb a shock in the case a vehicle collides against the object, comprising at least one body of resilient material; and, at least on the front part of the body, a closed and flat front element of material with a low coefficient of friction in the case of contact with material of the vehicle.

Abstract: A shock absorber includes an outer tube, an inner tube having a proximal end sleeved slidably into the outer tube and a distal end extending away from the outer tube, a shaft disposed inside the inner tube, a plurality of shock absorbing elastic blocks which are mounted on the outer tube for positioning resiliently the distal end away from the outer tube and which are sleeved around the shaft inside the inner tube without contacting the inner tube, each block having an inner tubular part sleeved around the shaft, and an outer tubular part wrapped around the inner tubular part. The inner and outer tubular parts are made of rubber materials having different degrees of stiffness. The inner tubular part has a stiffness higher than that of the inner tubular part to resist and limit impact pressure acting on the outer tubular part, thereby reducing deformation of the outer tubular part along radial directions and preventing the blocks from contacting the inner tube upon shock.

Abstract: Contact noise generated between a striker cap mounted on a strut and a jounce bumper connected to a shock tower is reduced by providing an axial projection on the roof of the striker cap. The projection progressively displaces and compresses the elastomeric jounce bumper material and thereby avoids large compressive impulse forces and associated noise generation.

Abstract: A novel elastic bumper assembly put on an automotive vehicle or the like which includes an elastic bumper member adapted for repetitive cushioning against impacts, wherein the elastic bumper member is formed of a material selected from at least one of the group consisting of solid and foamed elastomeric materials. The elastic bumper member assembly further includes an insert member generally having a cup shape, the insert member having locking holes and dimples. The insert member is molded within the elastic bumper member. The insert member includes a locator projection which extends from the elastic bumper member. A fastener extends from the insert member through the elastic bumper assembly.

Abstract: An engine mounting device for connecting an engine with a body of a vehicle through a bumper cushion comprises a first support member connected to the engine, a stopper integrally formed with the first support member, an elastic member integrally formed with the first support member, a second support member connected to the body and a stopper holder integrally formed with the second support member for restricting a movement of the stopper. When the vehicle has an impact, either the stopper or the stopper holder is broken, thereby the engine is disconnected from the body to protect an occupant.

Abstract: A jounce bumper assembly for cushioning the impact between two components of an automotive suspension system is provided. The jounce bumper assembly includes a mounting plate with at least one, but preferably two, substantially tubular proturbances protruding from a face thereof. A bumper is molded from a microcellular polymeric material around the mounting plate such that the ends of the proturbances extend out from the bumper. The bumper is disposed within a mounting cup having a recess sized and shaped to receive the bumper. The recess has holes passing therethrough corresponding to the proturbances such that the ends of the proturbances pass through the holes. The ends of the proturbances passing through the holes are deformed radially outwardly such that the bumper is fixed within the recess of the mounting cup. A method of manufacturing such a jounce bumper assembly is also provided.

Abstract: An air spring has a pair of spaced end members for mounting the spring at spaced locations on a structure. A flexible sleeve of elastomeric material is sealingly engaged with the end members and forms a pressurized fluid chamber therebetween. A post is mounted on one of the end members and extends into the fluid chamber. A shock absorbing bumper formed of a high strength plastic is snap-fitted on an enlarged top of the post. One or more bumper extensions are stackable and matable on top of the bumper so as to allow for height adjustment without bumper removal.

Abstract: An elevator system 10 includes an elevator car 12 with a plurality of roller guide assemblies 20 attached hereto. The roller guide assemblies 20 guide the elevator car 12 vertically within a hoistway along a plurality of guide rails 16. Each roller guide assembly 20 includes at least one resin stop assembly 50 to minimize vibration and lateral movement of the elevator car 12. The resin stop assembly 50 includes a resin spring 52 adjacent to a rigid container 54, both coupled between a roller wheel arm 26 and the roller guide base 40. The resin stop assembly 50 improves the ride quality of the elevator car 12 by selectively limiting lateral acceleration and velocity of the elevator car 12.

Abstract: A marine fender has high bonding strength between a high-slip synthetic resin plate such as an ultrahigh-molecular-weight polyethylene plate and a rubber fender member, and quite long life-time of the high-slip synthetic resin plate. The high-slip synthetic resin plate and a rubber layer are previously welded to each other. The high-slip synthetic resin with the rubber layer and the rubber fender member are welded to each other by vulcanization. In this way, the marine fender is made.

Abstract: A vibration damper comprises an attachment member and a damping mass connected by an elastomer spring with a plurality of elastic coupling elements. The coupling elements are inclined relative to the direction of the spacing between the damping mass and the attachment member. The inclination angle of the coupling elements is adjusted so that the natural vibrational frequency of the vibration damper in the spacing direction can be tuned largely independently from that in a direction perpendicular to the spacing direction.

Abstract: A suspension stop member, for positioning between a first, movable element and a second, relatively fixed element, such as between the frame and the axle of a vehicle, for resiliently absorbing suddenly applied shocks and stopping the relative movements of the elements, is formed of a generally pear-shaped, resilient tube having a generally circular opening. The tube has an upper, flat end portion, for fastening to the movable element, and a lower, flat end portion for engaging the second element. The sides of the outer surface of the tube are bulged outwardly from the upper end portion part way towards the lower end portion and then are tapered downwardly towards each other to join the lower end portion. The upper part of the surface defining the opening is generally flat and coextensive with said upper end portion. The thickness of the wall segment at the lower end of the stop member is considerably greater than the generally similar wall thicknesses of the remainder of the member.

Abstract: A vibration damper comprises an attachment member and a damping mass connected by an elastomer spring with a plurality of elastic coupling elements. The coupling elements are inclined relative to the direction of the spacing between the damping mass and the attachment member. The inclination angle of the coupling elements is adjusted so that the natural vibrational frequency of the vibration damper in the spacing direction can be tuned largely independently from that in a direction perpendicular to the spacing direction.

Abstract: A composite elastomeric spring having a predetermined final shape and including a first member of elastomeric material having a first durometer hardness and a second member of elastomeric material having a second durometer hardness is disclosed. The second member has a predetermined initial shape complimentary to an initial shape of the first member. The second member is positioned adjacent and in circumferential surrounding relation relative to the first member to define a preform composite spring member. After the second member is positioned about the first member, a force is applied to the preform composite spring member sufficient to simultaneously compress the first member and the second member thereby permanently changing the initial shapes of the first member and second member are permanently changed from their respective predetermined initial shape such that the first and second members are thereafter maintained in captured relationship relative to each other.

Abstract: A bump stop seat structure which can achieve a larger cabin space in the room of a vehicle or automobile without sacrificing a bump stroke by suppressing roll angle. In the bump stop seat structure, a stop seat (12) is provided on a housing (6) of an axle (2) of the vehicle in such a manner as to face a bump stop (9) mounted on a body (1) thereof. Further, a flat end face (13), which is nearly level and faces upwardly, is provided on one of opposite side portions of the stop seat (12), which are arranged in the direction of width of the vehicle. Moreover, a convex part (14) projecting to the bump stop (9) is provided only on a part of the other side portion of the stop seat (12). Thus, the convex part (14) is in contact with the bump stop (9) only when the vehicle performs a rolling movement.

Abstract: A conveyor platform is formed from a series of pivotally interconnected segments. Each segment has a stop block, and each stop block has two strike faces. Each strike face abuts against an opposing strike face on adjacent stop blocks when the platform is in a planar position. The stop blocks cannot be compressed, so, when the platform is carrying a load, the stop blocks prevent the platform from sagging. The platform turns as it travels around drive chain sprockets on the return portion of the cyclical drive chain pattern. When it turns, a gap is created between opposing strike faces on adjacent stop blocks. When adjacent segments of the platform emerge from the turn, the opposing strike faces come rapidly together. A bore extends inwardly from one of the strike faces on each stop block and a resilient urethane plug is mounted in the bore. The plug projects slightly beyond the strike face when the opposing strike face on the adjacent stop block is spaced from the plug-bearing strike face.

Abstract: A noise damping composite includes a viscoelastic layer disposed between a pair of constraining metal layers, the viscoelastic layer including a pattern of adjacent stripes of different viscoelastic materials. Stripes of two or three different materials are disclosed. The viscoelastic layer can be applied in either liquid or solid form. In the former, it may be provided with mica platelets distributed throughout the layer.

Abstract: A vibration-reduced impact tool is disclosed wherein an elastomeric vibration isolator is fixedly attached within the tool housing and functions to absorb the vibration typically transmitted from the handle to the operator. The isolator is mounted between the cylinder assembly and the handle. As the tool is operated, a piston within the cylinder assembly is driven forward where it impacts with a tool accessory. The impact causes the piston and cylinder assembly to slide rearward in the tool housing, toward the handle. The elastomeric isolator absorbs the rearward movement of the cylinder assembly and thereby eliminates much of the vibration normally transmitted from the cylinder assembly to the handle and in turn, to the operator.

Abstract: A tubular compression spring body made of a thermoplastic elastomeric material has stepped internal and external wall surfaces that are designed so that when the body is compressed, it absorbs a large amount of the compression energy and has a low rebound force. Also, when compressed again after rebound, the compression spring body exhibits excellent repeatability in its force-displacement performance. In different embodiments, the compression spring body may be designed to exhibit various force-displacement performance curves in order to meet various criteria desired by the user, such as maximum energy absorption and/or minimum rebound force.

Abstract: A fender protective structure includes a top layer of ultra high molecular weight polyethylene on a resilient layer comprised of a rubber and plastic alloy. Bore holes are provided in the resilient layer for permitting bulging to facilitate energy absorption when the fender protective structure is impacted by a moving object.

Abstract: An elastomeric bumper restricts movement of large objects such as diesel engines to .+-.0.5" along the bumper's axis. The bumper includes a solid elastomeric button, an elastomeric sleeve spaced therefrom by a gap, and a rigid, tight fitting cup which surrounds the sleeve and limits the outward bulging of the elastomer. The button has an axial length which exceeds the length of the sleeve by an amount which defines a first volume of elastomer. That volume is designed to be equal to the volume of the gap. When the movement of the large object has caused the equivalent of the first volume of elastomer to flow into the gap, additional movement of the object is resisted by bulk loading of the elastomer which behaves as an incompressible fluid and resists additional motion with the full weight of the support to which the bumper is attached.

Abstract: A portable emission microscope for analyzing failures in an integrated circuit chip while the chip is contained within a wafer sorter. A base for the microscope is placed over an opening in the wafer sorter. A translational apparatus is attached to the base for lowering a charge coupled device camera into an opening in the wafer sorter. A compact housing containing microscope optics is coupled to the camera. Also, a flexible rubber boot is coupled to the microscope optics for shielding extraneous light from entering the camera. A vibration reducing apparatus is coupled to the microscope optics for preventing movement of the camera relative to the chip. The vibration reducing apparatus fits within the rubber boot and is a rigid, hollow cylinder having an adjustable length. The microscope optics view the chip through the cylinder.

Abstract: An energy absorbing device includes an energy absorber element having a plurality of elongated hollow hexagonal cells. The cells are arranged in a block shape with first and second layers interconnected by an intermediate plate. The intermediate plate closes adjacent ends of the first and second layers and forms three-sided pyramidal structures which project into each individual cell of the first and second layers. Each pyramidal structure has an apex located near the center of each cell. The energy absorber element is deformable under impact loading conditions to absorb and dissipate energy. Upon the removal of the impact load the energy absorber element returns to its original shape.

Abstract: An improved shock absorber device including first and second shock absorbers. The spring characteristics of the shock absorbers provide a jump function. The position and size of the differential force value in the region of the spring characteristics are such that, when propulsive and shock forces occur with a force value within the differential force value, the second shock absorber is not activated and the first shock absorber has already reached its maximum shock absorbing limit.

Abstract: An jounce bumper apparatus has an elastomeric body (18) bonded directly to a head (30) of a threaded fastener (20) for providing controlled impact of a second member 46, such as a lower control arm of a vehicle suspension, with an adjacent first member (48), such as a vehicle frame. Bonding strength may be enhanced by the use of an enlarged head (30) combined with forming circumferential grooves thereon.

Abstract: A loading dock bumper assembly includes at least one bracket for mounting the assembly on a surface of a loading dock. At least one resilient bumper component is attached to the bracket, the bumper component formed of a block of resilient recycled plastic material is positioned to receive the impact of a motor vehicle backed into abutment with the dock. The block is preferably formed of extruded high density polyethylene. A side of the block adapted to receive contact with a motor vehicle may be provided with a slot along its length. The slot is adapted to have secured therein a wear bar substantially of equal length with the bumper component. The preferred wear bar is a steel bar of rectangular cross section fitted into the slot with a surface thereof substantially flush with the surface of the resilient component. At least one corner of the block preferably is provided with a chamfer cut at approximately 45.degree. whereby lodging of a truck bumper on the assembly is obviated.