Abstract: An upper-extremity prosthetic is adapted to engage with an athletic ball. The prosthetic includes one or more springs that provide energy return as a user is throwing the ball using the prosthetic. The springs can have a conductivity that changes in relation to an amount of strain or deformation of the spring. The change in conductivity can be used to provide haptic feedback to the user so the user can sense the amount of force being applied to throw the ball. In some embodiments, the springs are made by a multi-material 3D printing (additive manufacturing) process and include a first material that is electrically non-conductive and a second material that electrically conductive. In some embodiments, the prosthetic also includes one or more cantilevered springs that are also adapted to engage with the ball and to provide energy return while throwing the ball.

Abstract: A method and apparatus for a vehicle suspension system gas spring. In one embodiment, a vehicle suspension system gas spring includes a compressible main gas chamber and an additional volume combinable with the main chamber to change a gas spring rate of the system. In one embodiment, a low friction piston seal is created by a flexible seal member.

Abstract: Some embodiments are directed to a method for estimating a periodic or substantially periodic force present in a mechanical or electromechanical system, the method comprising: estimating, by a processing device, one or more harmonic frequencies of an acceleration signal representing an acceleration in the system, the substantially periodic force contributing to said acceleration; and estimating, by the processing device, the force on the basis of a dynamic model of the system, the dynamic model being defined by said one or more estimated harmonic frequencies.

Abstract: Shock and vibration isolators and their use to isolate loads from vibration and shock, where the isolators include a fluid spring assembly and a mechanical spring assembly, where the fluid spring assembly and the mechanical spring assembly are arranged in series. The mechanical spring assembly includes a first spring and a second spring arranged so that compression of the mechanical spring assembly simultaneously directly compresses the first spring and indirectly compresses the second spring via an intermediate actuator, such that the first and second spring are compressed in parallel.

Abstract: A vehicle wheel suspension includes a suspension spring and an additional spring element. The additional spring element is disposed in a working chamber of a hydraulic cylinder. The working chamber, in hydraulic terms, is configured to be completely shut off by a check valve and the volume thereof with an opened check valve while activating a vehicle drive apparatus with braked vehicle wheels being variable by the anti-dive angle and/or the anti-squat angle. For such a volumetric variation of the working chamber, a hydraulic medium is flowable through the opened check valve.

Abstract: A bearing spring/damper system of a vehicle wheel has a hydraulic vibration damper consisting of a damper cylinder and a damper piston guided therein, the piston rod of which hydraulic vibration damper is fastened to the vehicle body, whilst the damper cylinder is supported to a wheel guiding element. A pretension spring is clamped functionally between the damper piston and a pretension piston which can be displaced hydraulically in the longitudinal direction of the piston rod. The pretension piston is supported hydraulically with respect to the damper cylinder by a support chamber filled with the hydraulic medium of the vibration damper, and can be displaced by a conveying device, which conveys hydraulic medium into or out of the support chamber. The pretension spring is parallel-connected in every possible position of the pretension piston of a bearing spring ultimately clamped between the vehicle body and the wheel for force transmission.

Abstract: A regenerative shock absorber that include a housing and a piston that moves at least partially through the housing when the shock is compressed or extended from a rest position. When the piston moves, hydraulic fluid is pressurized and drives a hydraulic motor. The hydraulic motor, in turn, drives an electric generator that produced electric energy. The electric energy may be provided to a vehicle, among other things. The regenerative shock absorber may also provide ride performance that comparable to or exceeds that of conventional shock absorbers.

Abstract: A vehicle shock absorbing system includes a wheel, a vehicle body, a first absorber, a dynamic absorber, and a third absorber. The third absorber is attached to the vehicle body. The first absorber is between the third absorber and the wheel. The dynamic absorber is attached to the wheel and includes a dynamic absorber mass and a spring.

Abstract: A damper assembly for a vehicle which includes a damper body, a first ring element, and a spring coupler. The damper body includes a threaded portion which extends between a first end and a second end of the damper body. The first ring element is disposed within a first groove in the threaded portion. The spring coupler having a passage to concentrically receive the damper body such that the spring coupler is configured to slide over the first ring element. The first ring element is disposed within the first groove of the threaded portion such that a sliding clearance is provided between an inner portion of the spring coupler and the threaded portion.

Abstract: Non-linear forces are simulated by a dual-rate spring apparatus, which may also be used to impose nonlinear forces. The apparatus includes a carriage and at least two springs arranged sequentially in series with one another. The spring constant is changed by initially allowing both of the springs to compress to a point and, thereafter, after one spring is generally completely compressed, allowing only the other spring to compress further.

Abstract: A damper with a cylinder and a rod, a spring arranged around the damper and a linear actuator arranged to change in a controlled manner the axial position of a bottom end of the spring relative to the cylinder of the damper. The actuator comprises an inner cylindrical element arranged to be mounted around the cylinder of the damper, an outer cylindrical element, which is mounted so as to be axially slidable relative to the inner cylindrical element and is arranged to support the bottom end of the spring, and a working chamber arranged to be filled with a fluid under pressure to adjust the axial position of the outer cylindrical element relative to the inner cylindrical element. The working chamber is delimited, both radially and axially, only by the inner cylindrical element and by the outer cylindrical element. The outer cylindrical element is provided with a support flange arranged to support the bottom end of the spring.

Abstract: The invention relates to a process for the impregnation of air core reactors or parts of air core reactors and impregnated air core reactors or parts thereof obtainable by said process.

Abstract: A hydraulic shimmy damper that resolves drawbacks in several known shimmy dampers, such as damping characteristics that are dependent on oil temperature variations. The disclosed shimmy damper includes a hydraulic compensator (40) having an internal fluid volume that is significantly more important than a fluid volume expelled from the body of the shimmy damper when its piston moves fore and aft. The shimmy damper also includes a hydraulic manifold (30) arranged between the body and the hydraulic compensator and defining a transfer channel between chambers in the piston that is connected to the hydraulic compensator. The manifold receives interchangeable hydraulic cartridge-type valves (CV1,RV1; CV2,RV2) for metering the fluid flowing from the chambers to the transfer channel, and allows the fluid to freely enter the chambers from the transfer channel. The present shimmy damper is therefore much less sensitive to oil temperature variation under intense shimmy.

Abstract: A shock absorber, which is particularly applicable to bicycles, includes a mount body, a first cap portion, a second cap portion, and a fluid cylinder. The fluid cylinder cooperates with a valve assembly that is offset from the mount body. The first and second cap portions enclose a gas cavity or gas chamber. One of the first and second cap portions is interchangeable with other caps so as to alter the performance of the shock absorber by altering the size of the gas chamber. The replaceable cap cooperates with the mount body such that it can be replaced without removing the shock absorber from a bicycle.

Abstract: Methods and apparatus are provided for a damper having a jounce shock. The damper includes a top mounting portion adapted to couple the damper to a vehicular frame and a bottom mounting portion adapted to couple the damper to a vehicular suspension system. The damper further includes a damper tube assembly disposed between the top mounting portion and the bottom mounting portion. The damper tube assembly includes a jounce shock system and a rod having a first piston and a second piston. The rod is movable within the damper tube assembly from a first position to a second position, and the second piston engages the jounce shock system as the rod approaches the second position.

Abstract: A vehicle and a suspension assembly for a vehicle are disclosed. A shock absorber includes a distal end and a proximal end spaced from each other along a central axis. A first spring and a second spring each encircle the shock absorber. The first and second springs align with each other along the central axis between the distal and proximal ends. An actuator includes a movable portion which is movable relative to the shock absorber between a first position wherein the first spring and the second spring are both compressible to define a first total spring rate, and a second position wherein the first spring is incompressible and the second spring is compressible to define a second total spring rate different from the first total spring rate.

Abstract: A passive skyhook and groundhook damping vibration isolation system and a method for determining parameters thereof, which utilize the anti-resonance of an “inerter (b1, b2)-spring (k1, k2)-mass (m1, m2)” vibration state converting system to convert the resonance of the isolated mass into the resonance of the inerter, thus eliminating the resonance of the isolated mass, is provided. A damper spans and is connected in parallel to the inerter, preventing the damper from spanning and being connected in parallel to the isolated mass. The damper is not required to connect to an inertial reference frame, and the vibration of the isolated mass is suppressed.

Abstract: A spring structure includes a clockwise spring and a counterclockwise spring that are coaxially arranged under a state in which a spring seat is interposed between a lower end portion of the clockwise spring and an upper end portion of the counterclockwise spring. An upper end portion of the clockwise spring is supported on an upper spring seat portion, and a lower end portion of the counterclockwise spring is supported on a lower spring seat portion.

Abstract: A damper for a landing gear of a helicopter having a barrel, a piston defining a first hydraulic cavity between the piston and a bottom end of the barrel and a second hydraulic cavity between the piston and a top of the barrel, a stack of disc springs disposed within the first hydraulic cavity in a compressed state between the bottom end of the barrel and the piston. Each of the disc springs having a substantially concave side and an opposing substantially convex side, the disc springs stacked in an alternating pattern such that any two adjacent washers have their like sides positioned adjacent to each other. A spring disposed within the second hydraulic cavity such that the spring is compressed between the compression member and the top of the barrel when the piston is in an extended position. A hydraulic fluid is disposed inside at least a portion of the first hydraulic cavity and at least a portion of the second hydraulic cavity.

Abstract: A suspension device (S) as a solution for the problem of the present invention includes: an active suspension unit (U) equipped with a linear actuator (A) and a first fluid pressure damper (D1) connected to the actuator (A) to extend and retract in the same direction; and a second fluid pressure damper (D2) arranged in parallel with the active suspension unit (U).

Abstract: The invention relates a spring strut arrangement for wheel suspensions of motor vehicles, which is formed from a telescoping shock absorber, a suspension spring element which is preferably made as a helical compression spring, and a preloaded spring element which is preferably made as a helical compression spring, the spring elements being supported by way of spring caps on the body of the motor vehicle and on a wheel suspension element and a third spring cap located in between being movably guided along the longitudinal axis of the shock absorber relative to the body by way of an electrically driven positioning drive which is located within the spring elements, the positioning drive having a positioning spindle which is pivoted around the shock absorber and an adjusting nut which is connected to the movable spring cap.

Abstract: A suspension system may be provided. The suspension system may comprise a wheel support idler and a strut. A top end of the strut may be attached to a bottom of the wheel support idler. The suspension system may further comprise a spring configured to absorb shock from the strut. A bottom of the spring may be attached to a top of the wheel support idler. The suspension system may further comprise a first tower and a second tower. The wheel support idler may be configured to slide up and down on the second tower and the wheel support idler may not contact the first tower.

Abstract: A damper (D1) comprising an actuator A connected to a sprung member (B) side of a vehicle, the actuator having a motion converting mechanism (T) for converting a linear motion into a rotational motion and a motor (M) to which the rotational motion resulting from the conversion by the motion converting mechanism (T) is transmitted; a hydraulic damper (E), the hydraulic damper (E) having a cylinder (C), a piston (P) inserted slidably into the cylinder (C) and defining two pressure chambers within the cylinder (C), and a rod (R) connected at one end thereof to the piston (P), the linear motion of the actuator (A) being transmitted to one of the rod (R) and the cylinder (C), the other of the rod (R) and the cylinder (C) being connected to an unsprung member (W) side of the vehicle; a spring (1) accommodated within one of the two pressure chambers and biasing the hydraulic damper (E) in a damper compressing direction; and a spring (2) accommodated within the other pressure chamber and biasing the hydraulic damper

Abstract: The invention relates to a wheel suspension for motor vehicles, with a suspension strut which is formed from a shock absorber and a bearing spring, the bearing spring being supported by way of spring plates on the body of the motor vehicle and on the tube of the shock absorber, and a spring plate being movably guided relative to the body and able to be moved axially by means of an actuator relative to the shock absorber tube, and the suspension strut having a preloaded spring with a spring force which is opposite the bearing spring, which is supported on the body of the motor vehicle and also on the movable spring plate of the bearing spring. According to the invention, the actuator is located outside, in particular radially outside the suspension strut.

Abstract: A suspension strut with an elastomer block for a wheel of a vehicle, in particular, for a wheel of a motorcycle is provided. The spring constant of the elastomer block, which interacts with an additional spring element, can be changed by introducing a control sleeve between the elastomer block and the body of the suspension strut. The elastomer block further is effectively disengaged from the additional spring element when the control sleeve is in a lower end position, so that the spring rate is determined only by the additional spring element.

Abstract: The present invention relates to dual-spring assembly that may be employed in cooperation with a damper unit to form a shock absorber. The spring rate of at least one of the springs is adjustable with a preload mechanism, which in turn is movable relative to the damper unit. Further, the dual-spring assembly includes two compression springs arranged in series and each having selected, but different spring rates. The first spring primarily absorbs the energy of applied loads that are below a first amplitude or threshold of applied load. Once the applied loads exceed the first amplitude of applied load, the dual-spring assembly operates with an effective spring rate to absorb the energy of applied loads that exceed the first amplitude of applied load. After a second spring of the dual-spring assembly achieves a desired amount of deflection, the first spring continues to absorb energy from the applied loads.

Abstract: In a front fork in which a partition wall member is provided in an inner periphery of an inner tube, a working fluid chamber is comparted under the partition wall member and an oil reservoir chamber is comparted over the partition wall member, a main suspension spring is interposed between an upper spring bearing in a piston rod side attached to an outer tube side and a lower spring bearing in a bottom portion side of the inner tube, within the working fluid chamber of the inner tube, and a sub suspension spring is interposed between an upper spring bearing in an upper end portion side of the outer tube side and a lower spring bearing in the partition wall member provided in an inner periphery of the inner tube, within the oil reservoir chamber of the inner tube.

Abstract: The invention relates a spring strut arrangement for wheel suspensions of motor vehicles, which is formed from a telescoping shock absorber, a suspension spring element which is preferably made as a helical compression spring, and a preloaded spring element which is preferably made as a helical compression spring, the spring elements being supported by way of spring caps on the body of the motor vehicle and on a wheel suspension element and a third spring cap located in between being movably guided along the longitudinal axis of the shock absorber relative to the body by way of an electrically driven positioning drive which is located within the spring elements, the positioning drive having a positioning spindle which is pivoted around the shock absorber and an adjusting nut which is connected to the movable spring cap.

Abstract: A piston/cylinder unit is disclosed. The piston/cylinder unit includes a pressure tube having one end; a piston rod axially movable in the pressure tube, the piston rod extending through the one end of the pressure tube so that a portion of the piston rod is disposed outside the pressure tube; a casing tube attached to the portion of the piston rod, the casing tube at least partially enveloping the pressure tube; and a bush attached to the pressure tube, wherein the bush is disposed between the casing tube and the pressure tube so that the casing tube is axially movable relative to the pressure tube via the bush.

Abstract: A spring assembly has a master spring, a slide, a stop and at least one auxiliary spring connected in series with the master spring. The auxiliary spring has a first end to which the stop is fastened, and a second end facing away from the first end, with respect to which the slide can be fastened. The position of the slide is adjustable such that, when, during the compression of the spring assembly, the auxiliary spring has overcome a predetermined compression path, the stop strikes against the slide, and a further compression of the auxiliary spring is thereby prevented. A spring strut for a motor vehicle has the spring assembly. An alternative spring assembly arranges the auxiliary spring parallel to the master spring with a first end in the compression direction of the spring assembly being freely displaceable.

Abstract: The invention relates to a wheel suspension for motor vehicles, with a suspension strut which is formed from a shock absorber and a bearing spring, the bearing spring being supported by way of spring plates on the body of the motor vehicle and on the tube of the shock absorber, and a spring plate being movably guided relative to the body and able to be moved axially by means of an actuator relative to the shock absorber tube, and the suspension strut having a preloaded spring with a spring force which is opposite the bearing spring, which is supported on the body of the motor vehicle and also on the movable spring plate of the bearing spring. According to the invention, the actuator is located outside, in particular radially outside the suspension strut.

Abstract: A device is provided for pivoting a lid, especially a motor vehicle lid, around a pivot axis. The pivoting device has a first actuating unit on one side of the lid and a second actuating unit on the opposite side of the lid. The two actuating units have substantially the same drive forces in a first section of the lid travel distance and different drive forces in a second section of the lid travel distance.

Abstract: A stabilizing apparatus and method that replaces the existing shock absorber of a road vehicle that works to resist the initiation of body roll during cornering. It seeks to counter act the forces being generated by the vehicle suspension springs that exacerbate the rollover propensity of vehicles during certain steering maneuvers.

Abstract: A stabilizing apparatus and method that replaces the existing shock absorber of a road vehicle that works to resist the initiation of body roll during cornering. It seeks to counter act the forces being generated by the vehicle suspension springs that exacerbate the rollover propensity of vehicles during certain steering maneuvers.

Abstract: A balance suspension system for a vehicle having a body and at least four wheels (FR, FL, BR, BL) independently supported for movement between upper and lower positions relative to the body, the suspension system includes a balance mechanism adapted to support suspension forces in the vehicle and a plurality of actuating elements (73, 74, 78, 79) which are responsive respectively to the positions of the wheels relative to the body and are operable on spaced apart points on the balance mechanism. The system also includes control means for controlling relative movement between the balance mechanism and the body. The control means act to redistribute suspension forces between the body and the wheels, thereby to induce predetermined suspension behaviour.

Abstract: A piston-cylinder assembly has a principal structural group including a cylinder and another principal structural group including a piston rod which has a part-length axially displaceably arranged within the cylinder. The piston rod adopts a default stroke position without external displacement forces acting on the piston-cylinder assembly, the default position being determined by positioning equipment. The positioning equipment includes at least one energy accumulator which acts in the inward and outward movement directions of the piston rod as a function of the stroke position of the piston rod. The at least one energy accumulator includes a tension spring arrangement and a compression spring arrangement.

Abstract: The invention herein relates to a hydraulic oil cylinder structure with reverse force function comprises of a piston rod with one threaded end and ring base on the other end; the piston rod is housed in order with a elastic cushion, a cover body, a cushioning circle, a spring, a spring fastening member, a tension spring, a cushioning ring and a piston; when the piston rod is stepped downwards for physical exercise, the piston rod can resume automatically by the reverse force function of the tension spring to allow the exerciser to choose to operate by exercising with single foot, both feet up or both feet down.

Abstract: A cushioned braking system for cushioning the impact of a moving vehicle for amusement for children is disclosed. The braking system comprises a double ended air cylinder having a first cylinder end and a second cylinder end. A first head member and a second head member close the first and second cylinder ends, respectively. A first piston rod extends axially outward from the cylinder through the first head member. A first piston is on the first piston rod within the cylinder. A second piston rod extends axially outward from the cylinder through the second head member. A second piston is on the second piston rod within the cylinder. A spring assembly resiliently connects the first piston to the second piston within the cylinder. The spring assembly serves to bias the first and second pistons toward a reference position. The cylinder also has a vent for controlling air flow within the cylinder.

Abstract: The present invention is directed to a one piece, integrally molded, bumper-bellows subassembly for use in vehicles, for example, for use in suspension systems, rack and pinion steering systems and airsprings. The present subassembly prevents the elements from entering the bottom of the subassembly and thus eliminates the possibility of damage to the piston rod and seals of the damper. The present subassembly is cost-effective to produce and can be installed quickly and easily. During operation, the present subassembly is stable and is not affected by a severe drop in the suspension.

Abstract: A suspension system for motor vehicles is disposed between body (1) and wheel (2) and is provided with a damper (4) with integrated resonance dampers (40, 48) for improved insulation of transmission of road unevenness to the body. The resonance damper is formed in that the casing (40) of the damper (4) forms a moving mass m.sub.40 between the body (1) and the wheel (2), the casing being connected to the wheel via a spring (48) harmonized with the mass m.sub.40. The pistons (41, 42) of the damper are connected via piston rods (43, 44, respectively) to the body (1) and the wheel (2), respectively.

Abstract: A suspension for a vehicle wheel, comprising an elongated shock absorber (7) having an elongated body (6) and first and second abutments at opposite ends of the shock absorber. First and second coil compression springs (R20, R30) are aligned with each other and surround the shock absorber (7). One of these springs bears against one of the abutments and the other of the springs bears against the other of the abutments. A cup (32) is disposed between the springs, this cup surrounding the body and being movable lengthwise of the body. Both of the springs bear on the cup (32). An annular jack (5) is fixed to and surrounds the body and comprises one (10) of the abutments. A third abutment (31) is fixed to the body a distance from the jack (5). An elastic ring (54) is compressible between the cup (32) and the third abutment (31).

Abstract: A shock absorbing device is disclosed, allowing reducing the vehicle weight at least by half. The device includes a tubular housing (TH) and within it a resilient shock dampening assembly (SDS) elastically axially movable is secured, through one or more inter coiled preliminary extended tension coil springs 6 and (6a). (SDS) also is locked to (TH) by a locking ring (8), in order to preserve said preliminary extension. (SDS) includes a plurality of telescopic sections, (UTS), (ITS2), (ITS1), and (LTS), resiliently supported by a plurality of compression coil springs (1), (2), and (3), interposed between them, designed to absorb average shocks. When the greater shock forces after entirely compressing the springs reach their predetermined unlocking level, rather than bottoming, ring (8) is opened, allowing the (SDS) to extend axially upward, opposed by springs (6) and (6a).

Abstract: An air damper utilizing only recirculating internal air for dampening in one direction of movement an openable object includes inner and outer cylinder members, primary and secondary shafts, first and second controllable orifice structures, primary and secondary end caps, and primary and secondary compression springs. The first controllable orifice structure restrains the flow of air from a first shaft chamber to the first head chamber to pass only through a first orifice in accordance with the movement of the primary shaft in a first axial direction. The second controllable orifice structure restrains the flow of air from a second shaft chamber to a second head chamber to pass only through a second orifice in accordance with the movement of the secondary shaft in the first axial direction.

Abstract: The stiffness of the suspension is very much a function of the load in hydro-pneumatic vehicle suspensions. With high loads the vehicle suspension is stiff and with a light load it is relatively soft. In addition, the vehicle suspension of the wheel on the outside of the turn is stiffer than that of the wheel at the inside of the turn. The changes in the stiffness of the vehicle suspension are very disagreeable and can result in dangerous driving conditions. Equalization of the stiffness of the vehicle suspension is provided with the aid of a supplemental force. The supplemental force acts in the same direction as the load force of the vehicle chassis. The vehicle suspension is preferably suited for motor vehicles.

Abstract: A hydraulic positioner for seats includes a cylinder and piston structure with a piston rod secured to the piston and extending from the cylinder. A reservoir is provided in the cylinder by a gland jointly biased by a first spring located within the cylinder and a second spring which also urges the piston rod to an extended position. A sleeve is movable by the gland for visual indication of the hydraulic fluid in the cylinder.

Abstract: Among two damping devices arranged in series between wheel side members and body side members, while in one damping device spring constant of a spring member is set low and damping coefficient of a damper member is set high, in the other damping device spring constant of a spring member is set high and damping coefficient of a damper member is set low. By this arrangement, difference in damping force between the area of low oscillation frequency and the area of high oscillation frequency can be made large, whereby running stability and comfortableness to ride in can be improved on a high level.

Abstract: The total periodically induced vibratory disturbance in a structure having unique structural characteristics is minimized. Actuators are operated in response to complex input signals to produce counteractive forces in the structure. Sensors responsive to the vibrational disturbance and the counteractive forces produce outputs indicative thereof. A processor having an electrical characteristic related to the structural characteristic produces complex outputs for each actuator in response to the sensor inputs. The complex outputs are adjusted by the processor to result in a convergence of the structural response to the minimum vibration in response to the disturbance and the actuator inputs.

Abstract: A vehicle seat mounting structure includes a base, a seat mount, and a mechanism operably interposed between the base and mount for controlling relative motion thereof. The mechanism includes a platform, air springs to cushion roadway induced shock, and linkage arms to couple the base, seat mount and platform. The mechanism produces a rearward tilting of a seat which is mounted on the structure when vehicle movement tends to throw the seat toward the front of the mounting structure.

Abstract: A method and apparatus for cancelling vibrations caused by periodic pulsating forces acting on a rotating shaft which are synchronous with the shaft rotation. An adaptive algorithm is implemented which utilizes the sensed velocity or acceleration of the difference between the pulsting forces acting on the shaft and an applied control force to generate an estimate of the phase shift existing therebetween to adjust a pair of adaptive weighting coefficients for sine and cosine force components which are adjusted by a least mean square (LMS) algorithm. Actuating signals for the reaction mass actuator are generated from the weighted force components which applies a controlled force to the shaft to oppose the shaft pulsation force and thus cancel the vibration.

Abstract: A hydraulic snubber device and more particularly, a snubber adapted to be interposed in the spring group between a bolster and a side frame member and having a single primary operating cartridge which is selectively usable with a plurality of differing configuration snubber casings or envelopes for a variety of spring group positions; and, further, a snubber device which is operationally positionable within the center of a spring group and is captively retained therein solely by communication of the snubber casing thereof with laterally adjacent springs of such a spring group.