Abstract: An automatically retractable swivelling wheels device of a pullman case is disclosed. The swivelling wheels device comprises a bushing, in which a spring retainer is formed on a bottom of a circumferential flange of the bushing, a wheel housing assembly and a swivelling wheels. The swivelling wheels is permitted to swing in any direction as the pullman case moved by a force, and once the force is removed, the swivelling wheels is automatically returned to its original direction by the cooperation of the restoration force of two out of shape springs provided in a C shaped groove of the wheel housing assembly with the spring retainer therebetween in order for the swivelling wheels to be retracted to a recess of the pullman case.

Abstract: A non-skid wheel brake mechanism includes a wheel body, a shaft part, left and right wheels each with a ring rim. The device includes an outer rim having an oval ring groove having upper and lower half portions. A substantially oval shaped shaft bore extends through the outer rim. A rim bore extends vertically through the outer rim to form an accommodating channel. The accommodating channel is in communication with the shaft bore. The ends of the wheel shaft is secured within the insert bores of the ring rims. An S-shaped spring plate is positioned inside the accommodating channel and extends into the shaft bore against the wheel shaft such that the ring rims are frictionally braked by the lower half portion of the oval ring groove.

Abstract: A juvenile high chair includes at least one leg. The leg comprises a foot having a bottom edge adapted to engage a surface underlying the foot, a roller, and a bracket having a first end coupled to the leg, a second end coupled to the roller, and a center flexible portion extending between the first and second ends. The first and second ends are substantially parallel to each other when a portion of the wheel engages the surface and displaces the bottom edge of the leg from the surface.

Abstract: A universal angle wheel assembly has a wheel holder plate, a main seat disposed on the wheel holder plate, a cover plate disposed on the main seat, a shaft extending from a top portion of the wheel holder plate, and a pivot pin fastening a wheel in the wheel holder plate. A positioning block is disposed in the main seat defining an upper hollow interior and a lower hollow interior. A guide hole is formed on the positioning block. A through hole is formed on a bottom of the main seat. A coiled spring, a bearing, and a cushion ring are inserted in the lower hollow interior. The shaft passes through the through hole, the cushion ring, the bearing, the coiled spring, and the guide hole. A round hole is formed on the shaft. A first positioning pin passes through the cushion ring and the round hole.

Abstract: A wheel assembly has a wheel holder seat having a hollow pivot end and two lugs, and a main seat having a reinforced main body, a hollow pivot cover, a notch, two inner flanges, an inner interior, and a post. The wheel holder seat has two laterals engaging with the inner flanges. A push rod has an upper recess hole. The push rod is inserted in the inner interior. A coiled spring has a lower portion inserted in the upper recess hole and an upper portion enclosing the post. The hollow pivot end is inserted in the hollow pivot cover. A pivot shaft fastens the hollow pivot cover and the hollow pivot end together. A pivot pin fastens a wheel between two lugs.

Abstract: A forklift truck having a drive wheel and a plurality of support wheels and a mounting arrangement for independently adjusting the vertical position of each support wheel. The mounting arrangement includes a cylindrical pivot sleeve attached to the forklift truck and a cylindrical pivot member coaxial with the cylindrical pivot sleeve and longitudinally and rotatably adjustable in the cylindrical pivot sleeve. A support wheel is pivotally mounted on the lower end of the cylindrical pivot member and a pin is provided adjacent to the lower end of the cylindrical pivot member for locking the cylindrical pivot member in one of at least two vertical positions in the cylindrical pivot sleeve.

Abstract: A wheel assembly for a baby stroller in which the wheel or wheels are mounted to the trailing portion of a linkage assembly that is pivotally carried at its midportion by a lower support. The leading portion of the linkage assembly is located ahead of the wheels and is connected by a tension spring to an upper support. Upward travel of the wheels is resisted by extension of the spring. The lower support mounts a lock movable into lock and release positions. In the lock position the lower support is prevented from rotating about a vertical axis relative to the upper support. In the release position such rotation can occur. Consequently, the baby stroller can be turned around and pushed in a direction opposite the original direction of travel once the wheel assemblies are properly oriented.

Abstract: A caster has a stationary hub with a bearing between the hub and a floor engaging wheel ring which allows the wheel ring to rotate relative to the hub. Torsional elastomeric elements mount the hub between spaced support arms radially inward of the bearing and are positioned eccentrically relative to the axis of rotation of the wheel ring so as to suspend the hub resiliently between the arms. In an alternate embodiment, the hub is cantilevered from a single support arm.

Abstract: A castor wheel assembly comprises a base member for mounting on an object to be supported, a swivel member mounted on the base member for rotation about the vertical axis. A castor wheel is mounted on a pair of side plates which extend upwardly from an axle of the castor wheel and horizontally to a cross shaft connected to the side plates. The cross shaft is mounted within a square tube forming part of the swivel member. The cross shaft carries a plurality of radially extending flanges so that elastomeric members positioned between the flanges and inside the tubular member act as a spring suspension allowing the side plates to rotate with the castor wheel relative to the swivel member about a horizontal axis providing a suspension action.

Abstract: The legs of a swivel caster assembly horn are mounted to a pair of horizontally-spaced beam plates which are pivoted to the legs ahead of the swivel axis. The caster wheel is mounted on an axle behind the swivel axis. A pair of urethane springs is mounted to the horn legs ahead of the pivot axis. A bolt across the front ends of the beams receives collars, each collar having a threaded transverse aperture which is screwed onto threads on the lower ends of bolts whose upper ends have heads with flanges which bear downward on a spring cap plate bearing downward on the tops of the springs, whereby the load on the caster horn is applied by lever action to the springs which are pre-loaded by the collars screwed onto the bolts.

Abstract: Three embodiments of a shock-isolating caster. A surface-effect damper engages at least one of a wheel element and an intermediate structural member to dampen vibration and shock loads which would otherwise be transmitted from the wheel element through the intermediate structure and mounting member to the equipment supporting cart. A first embodiment positions the damper between an outer wheel rim and an inner wheel hub. Second and third embodiments mount the wheel on a pivotable arm and dampen the movement of the arm. Capability to adjust damping levels is provided.

Abstract: A movable base for a baby walker includes a looped base frame, a number of casters, a corresponding number of compression spring members and a plurality of suction cup units. The base frame has a horizontal ring portion with an outer peripheral edge and a surrounding wall which extends downwardly from the outer peripheral edge. Each of the spring members has a first end connected to the ring portion and a second end connected to a respective one of the casters. The spring members are compressible so as to permit movement of the base frame between a first position, wherein the lowermost edge of the surrounding wall is located above the casters, and a second position, wherein the lowermost edge of the surrounding wall is in contact with the floor. Each of the suction cup units includes a shank portion that has a first end connected to the ring portion and a second end that is provided with a suction cup.

Abstract: A pivoting castor comprises a main body, a cross shaft, two wheeled members, a braking member, an elastic element, and a plug cover. The main body is provided with a receiving space, and a pivoting hole having respectively under both sides thereof a recessed arcuate collar block with a first contact portion. The two wheeled members are mounted on both ends of the cross shaft pivoted in the pivoting hole of the main body. The wheeled member is provided with a second contact portion engageable with the first contact portion to incapacitate the mobility of the wheeled members. The engagement of the first and the second contact portions is actuated by the elastic element received in the receiving space of the main body.

Abstract: A caster-supporting device includes a connector which is adapted to be connected to a stroller frame, a caster-mounting member which is mounted rotatably to the connector and which is adapted to carry rotatably a caster, and a locking unit which locks releasably the caster-mounting member on the connector to set a direction of the caster. The connector extends rotatably into a first upright tube of the caster-mounting member and is formed with a retaining notch. The locking unit includes a spring-loaded control piece provided in a second upright tube of the caster-mounting member, and a lever connected pivotally to the second upright tube adjacent to a top end of the latter. The control piece is axially movable in the second upright tube and has a raised cam portion that extends normally out of an open top end of the second upright tube.

Abstract: A retracting caster assembly is provided with a frame, a lever, a spring, a roller, and a manual retracting bolt. The lever is pivotally connected to the frame. The roller is connected to a first end of the lever. A spring loading member connects the spring to a second end of the lever. The spring biases the lever at a first position with the roller extended from the frame. The manual retracting bolt is adapted to manually move the lever to a second position with the roller retracted. The lever is suitably sized, shaped, and connected to the frame to hold the frame at a minimum predetermined distance from the ground until a predetermined weight is applied to the frame, at which point the linkage and lever arrangement decreases the mechanical advantage of the spring as the roller retracts, thereby minimizing the force required to retract the roller.

Abstract: A caster has two spaced apart wheels with an elastomeric torsional shock and vibration isolating suspension between them. The wheel axis is spaced longitudinally from a bearing axis to subject elastomeric disks positioned between the wheels to torsional shear stresses to help absorb shocks and vibrations. A snubber is provided for limiting the angular motion of the wheels about a bearing axis.

Abstract: The present invention provides a device for mounting a pair of casters to a tubular segment of a structure of a stroller. The mounting device consists of a first sleeve, a second sleeve and a cushion. Generally, the first sleeve is securely attached to a tubular segment of a structure of a stroller by means of a rivet or the like. The second sleeve pivotally receives the first sleeve, thereby permitting them to rotate relative to each other. The cushion consists of a cap-like element, a spring and a plug. The cap-like element has two slots longitudinally extending therein. The plug has a hole transversely extending therethrough. The cap-like element is securely connected with the second sleeve. The spring is received in the cap-like element. The plug is also received in the cap-like element. A shaft on which a pair of casters rotate is inserted through the slots in the cap-like element and the hole of the plug, whereby the spring is sandwiched-between the top in the cap-like element and the plug.

Abstract: An improved chair caster comprises a main body, an upright tube, an elastic element, and a sustaining element. The chair remains stationary when no one sits on the chair, so as to enhance the safety of an office worker.

Abstract: A baby walker includes a seat supported by a tray for surrounding a child in a standing position, and permitting the walker to move with the child as he walks, and for supporting a child in a seated position, a friction pad on the walker for selectively engaging the surface upon which the walker is supported for selectively inhibiting movement of the walker, a plurality of supporting wheels on the walker for supporting the walker for rolling translation on the supporting surface, and an adjustable suspension coupled between the walker and one or more of the supporting wheels for selectively actuating one of three modes of operation, namely a first mode in which the friction pad engages the surface substantially continuously for inhibiting movement of the walker, a second mode in which the walker is movably supported on the wheels when the child is standing and is supported on the friction pad means for inhibiting translation when the child is seated, and a third mode in which the walker is continuously suppor

Abstract: An undercarriage system apparatus is provided for supporting and transporting a fluidized patient support system above and across a floor. The apparpatus includes a base frame for carrying the fluidized patient support system, a plurality of heavy duty casters, and a pair of disk springs disposed between each caster and the base frame. Each caster includes a central shaft, a shoulder portion disposed about the central shaft for carrying the load, a wheel carriage rotatably mounted via needle bearings to swivel about the central shaft, and a pair of caster wheels mounted side-by-side to rotate about the wheel carriage. The disk springs of each pair are disposed to contact at their outermost edges. Each dish spring desirably has a maximum load capacity rated at least 50% above the nominal load which the disk spring must carry. The base frame defines a sleeve for receiving each central shaft of each caster. An elongated slot is defined through each sleeve.

Abstract: An apparatus defining a carriage to arrange for securement to a bottom surface of a gate, wherein the carriage includes an upper tray assembly for receiving the gate, with a lower framework pivotally mounted relative to the upper framework for accommodating uneven ground terrain, with the lower framework mounting a wheel rotatably thereto, with the wheel's axle generally aligned with the lower framework.

Abstract: A caster is provided that is vertically and rigidly coupled to a heavy instrument via a connecting member surrounded by a resilient damper that will flex under horizontal loading. The caster is improved in that the connecting member connects to a vertical load plate having a horizontal extension that provides a moment arm that exceeds any moment arm of the journal axis of the caster, thereby ensuring that minimum vertical preloading of the damper occurs, reducing the tendency to provide harmonic oscillation under vertical loading.

Abstract: A hub and wheel assembly for light load vehicle including baby carriages, infant strollers, wheelchairs and the like, the assembly having tandem wheels and a shock absorbing member in a trailing link suspension configuration. The assembly includes a wheel locking mechanism to lock one or both wheels into a secured position preventing the wheels from rolling about the axle. The wheel assembly incorporating a thrust bearing system to provide smooth and controlled swiveling relative to the vehicle body or frame and eliminates creeping and wobble. A swivel lock mechanism is also provided to allow the user to lock the tandem wheel assembly in a angular position relative to the vehicle body thereby preventing swiveling about the longitudinal axis of the swivel base housing. Each wheel is mounted to the axle in tandem using two low friction bearings and having a low-profile tire mounted to a rim with a reflective area for increasing safety in low elimination environments.

Abstract: A lockable caster wheel, in particular for movable hospital beds, has a fastening pin (1) and a swivel arm (8) which is positioned in a swivel bearing (7) with respect to said fastening pin. A wheel carrier (10), which bears at least one wheel (13), can swivel at the swivel arm (8) and is braced in a flexible manner via a wheel spring (20) against said swivel arm. A locking bolt (21), which is arranged coaxially to the fastening pin (1) and can be moved in the axial direction relative to said pin against the action of a lift spring (25) bears a brake lever (33), which blocks the wheel (13), and a mechanism for locking the swivel motion of the swivel arm (8), which encloses a locking disk (38a). The flexible axle (11) of the wheel carrier (10) runs parallel to the axis of rotation of the wheel (13) and intersects the longitudinal axis of the locking bolt (21). The brake lever (33) can be tilted in the wheel carrier (10) parallel to the flexible axle (11).

Abstract: A castor, which can efficiently absorb shock and the ball wheel of which can be alternatively received in or protruding beyond a cup-like shield thereof for positioning or moving. The caster comprises a sleeve which is secured to a hoop on the frame of a baby-walker for receiving a spring and a central shaft which comprises a ball wheel on the bottom. The sleeve comprises a Z-shaped track on its wall surface for the sliding and positioning therein of a lateral guide which is inserted therethrough and secured to the central shaft. A cup-like shield is secured to the bottom end of the sleeve to protect the ball wheel.

Abstract: A system for anchoring a mobile equipment carrier on a platform for transport by a freight carrier wherein the mobile equipment carrier is supported on a plurality of shock absorbing casters. Wheel anchors including a base bracket and a hold-down bracket attach the wheel of each caster to the platform to retain the caster against rolling and swiveling about the caster axis while accommodating vertical movement of the shock absorbing casters and the equipment supported thereby. The base bracket comprises a sheet metal member having end portions and an upwardly facing saddle shaped intermediate portion integral with the end portions and adapted to receive a caster wheel.

Abstract: A caster-supporting device for a baby stroller includes a sleeving secured to a stroller body. A connector is inserted into the sleeving and is retained on the sleeving by engaging the window of the sleeving with the resilient retaining member of the connector. The retaining member may be pressed to disengage from the window so as to remove the connector from the sleeving. A rotating body has a fixed circular tube inserted into the annular groove of the connector and carries a caster axle which extends therethrough. A vertical pin extends through the circular tube into the connector. A sliding body can slide on the connector and has two arms which flank the connector. The arms have vertical slide slots in which a horizontal pin slides. The horizontal pin extends through the connector and the upper end portion of the vertical pin so as to retain both the rotating body and the sliding body on the connector.

Abstract: This invention relates to a detachable castor support for a baby carriage and in particular to one including a body portion having a vertical shaft with a pivot hole and a protuberance, a stand having a rectangular recess having two sides each formed with a semicircular hole at the lower part thereof and an elongated slot at the front part thereof, a U-shaped member extending from the rear part of the stand and having a hole in each vertically extending sidewall of the U-shaped member and a semicircular notch at the bottom thereof, a connector disposed within the stand with its tubular lug engaged with the semicircular notch of the stand and its protuberance fitted into the elongated slot of the stand and a rivet extending through the hole of the U-shaped member and the lower part of the vertical shaft of the body portion whereby the baby carriage can be stowed conveniently and the castor thereof can be easily replaced with a new one once damaged.

Abstract: An improved wheel attachment mechanism for securing wheels to a child vehicle, such as a stroller or a carriage. The mechanism comprises a leg attachment member which is removably securable to a leg of the vehicle. An intermediate housing is removably secured to the leg attachment member and has a support surface for mating frictional engagement with an abutment wall of the leg attachment member to form a swivel joint to permit swivelling of the leg attachment member about a swivel post. The swivel joint is protected by an inverted cup member. A wheel axle housing is also removably secured to a suspension portion of the intermediate housing whereby the entire attachment mechanism may be dimantled by removable fasteners for servicing or repair of the wheel attachment mechanism.

Abstract: A caster has a fixed bracket (15), a rotary yoke (16) rotatably supported on the fixed bracket (15), and a wheel (2) rotatably supported on the rotary yoke (16) by a horizontal axle (16). The axle (16) is mounted for movement in a predetermined range in a horizontal plane in a direction which is at right angles to the axle. The rotary yoke (16) includes an automatic locking member (17) capable of moving between first and second positions in response to the movement of the horizontal axle. The fixed bracket (15) is provided with an engaging recess (36) for engaging the automatic locking member (17) to inhibit the rotation of the rotary yoke (16) when the fixed bracket (15) and the rotary yoke (16) are in a predetermined positional relationship and when the automatic locking member (17) is in the first position.

Abstract: A wheel fixing device for a wheel assembly of a baby carriage including:a hollow shaft element at the extream end of the shaft;a rotatable seat rotatable with respect to the wheel assembly being rotatably connected with a lower part of the hollow shaft element; the rotatable seat having a pair of knobs;a hub body joining said rotatable seat and a pair of wheels of the wheel assembly; anda slidable housing comprising:a central recess for encompassing the hollow shaft element and being vertically slidable along the hollow shaft element;a central slot on both sides thereof;a hole on both sides thereof;a spring member at both sides thereof with two legs extending in the same direction and with one leg thereof retained in the hole of the slidable housing and the other leg retained in respective hole of the hollow shaft element for securing the slidable housing and the hollow shaft element together and for imparting a desirable resiliency therewithin such that the slidable housing has a tendency to move downwards w

Abstract: A castor comprises a castor body (12), a castor wheel (14), and a bearing block (20) for supporting the castor wheel relative to the castor body. The bearing block is selectively mountable in each of a first and a second orientation relative to the castor body. In the first orientation of the bearing block relative to the castor body, the castor wheel is arranged to be braked in response to the application of a load applied to the castor. In the second orientation of the bearing block relative to the castor body, the castor wheel is arranged to be braked in the absence of a load applied to the castor.

Abstract: A wheel caster for a baby carriage in which a caster body is rotatable about a holder attached to a leg of the carriage. A stopper pivots in the caster body and is engagable with a vertical groove in the holder to prevent further rotation. The stopper has bosses which fit into vertical grooves in opposed arms of the caster body. Interiorly facing partial collars are formed in the arms beneath the grooves. Tabs on the stopper are engaged beneath the collars so that the stopper can not be removed but can nonetheless be easily assembled.

Abstract: This device prevents individual components of a load from being thrown off during halting of a conveying vehicle at a high rate of deceleration. A blocking device for the suspension of the caster which instantly assumes a front position as viewed in the direction of travel, prevents the vehicle from forwardly and downwardly dipping about the axle of the center-mounted drive wheels. The blocking device automatically adjusts itself corresponding to the direction of motion. A sliding stop vertically displaceably mounted on a pivotable part of a caster arrangement and a stop component fixedly mounted on the vehicle body cooperate to block the suspension of this front caster when the front caster experiences a predetermined degree of suspension displacement. At the caster instantly assuming the rear position, the stop component and the sliding stop are positioned at 180.degree. to one another, thus precluding inadvertent engagement and permitting full suspension displacement.

Abstract: A wheel bracket assembly includes two separate, platelike bracket parts which each have a noncircular opening therein and are disposed on opposite sides of a wheel in angular alignment. The ends of the axle for the wheel extend through the noncircular openings and the bracket parts are fixed against axial and rotational movement with respect to the axle. A method of making the wheel bracket assembly includes the steps of stamping out from at least one metal plate the two bracket parts which are substantially mirror images of each other and have the noncircular opening therethrough, placing the bracket parts in angular alignment on opposite sides of the wheel so that the ends of the axle extend through the noncircular openings, and upsetting each end of the axle to retain the bracket parts in place and so that the material of the axle flows to fill the noncircular openings in the bracket parts and thereby prevent relative rotation of the bracket parts.

Abstract: The present invention is related to a rotary roller set directional control device, particularly to a rotary roller set device, which is characterized by a novel design wherein two opposite longitudinal positioning slots are positioned at the upper section of a pivotal shaft socket, a pivotal supporting arm with a U-shaped rocker of which the front end is provided with a suitable catch key extended downward. The rocker may swing downward to assemble with the upper section of pivotal shaft socket and insert the catch key in the positioning slot. An annular flange on the top edge of pivotal shaft socket is designed to decrease the contact area between the pivotal supporting arm and the pivotal shaft socket when rotating the pivotal supporting arm to change the catch direction of U-shaped rocker so as to lower the frictional resistance.

Abstract: A wheel bracket mounting structure which includes an elongated and flexible bracket member having an axle mounting section and a stem mounting section at generally opposite ends thereof. The axle mounting section includes a generally flat, platelike portion. The stem mounting section includes an elongate, generally arcuate stem adapted to be directly attached to a support member on a wheeled vehicle. An intermediate section is provided between the axle mounting section and the stem mounting section. A segment is provided at the juncture between the intermediate section and the flat, platelike portion to provide a region remote from the arcuate stem about which the platelike portion can elastically flex relative to the arcuate stem.

Abstract: A suitcase is provided with a rotating wheel 13 or roller mounted for rotation on axle 19. The axle 19 is secured to a resilient shock absorbing structure in the form of a disk of hard rubber 23, which in turn is secured to a mounting plate 24 fixed to the suitcase wall or shell 26. This arrangement allows vibrations resulting from contact of the wheel with the ground to be absorbed before they reach the case.

Abstract: A shock absorbing caster wheel in which the wheel support bracket is pivotally mounted on a caster bracket and a spring engages the wheel support bracket and caster bracket to absorb shocks on the caster wheel. Vibration dampening pads on the caster bracket slidably engage wall surfaces on the wheel support bracket to dampen oscillation of the wheel support bracket.

Abstract: In a caster the inherent caster swivelling function for allowing a wheel (28) to change its direction of travel can be stopped or locked. The change between the locked and the free swivelling condition is effected by turning an operating lever (15). The angular position of the operating lever (15) for causing the change is held in two stable conditions corresponding to the locked condition and to the free swivelling condition. For this purpose a lever block (22) selectively and resiliently abuts either against a first abutment surface or against a second abutment surface (24, 25) of the operating lever (15), whereby the operating lever (15) has two stable states in its rotating movement. The operating lever (15) is provided with a fitting projection (27) adapted to engage and disengage from the fitting recesses (26a, 26b) formed in a bushing attached to the fixed shaft (1). The engagement and disengagement is correspond to the aforesaid two stable states whereby, these states are retained in a stable manner.

Abstract: A resiliently mounted dual wheel caster is provided which includes an outer body including a hub with a transverse aperture, and an inner body member pivotally mounted to the outer body and mountable to an article to be supported by the caster. A resilient shock absorbing member is disposed between the inner body and the hub of the outer body. An axle is disposed through the aperture in the hub and resilient wheels are mounted one each end of the axle. The resilient wheels and the resilient member act in series to effectively absorb shock encountered by irregularities in travelled terrain and prevent such shock from reaching the supported article.

Abstract: A caster wherein a rotary yoke (4) rotatably supporting a wheel (8) is supported by a vertically extending shaft (5) so that it is rotatable relative to a fixed bracket (3). The rotary yoke (4) is supported so that it is vertically movable relative to the fixed bracket (3) while overlapping the lower end of the latter. A cushion spring (6) downwardly urging the rotary yoke (4) is interposed between the fixed bracket (3) and the rotary yoke (4). Further, the caster is provided with a locking mechanism (10) for selectively stopping the inherent function of the caster of changing the direction of travel of the wheel.

Abstract: A lockable steering structure suitable for the front wheels of a baby cart for children including a grooved block slideable upon T shaped rails attached to both a support frame and a wheel mount so that in a locked position the block engages both rails, so locking the wheel mount to the support frame, and in an unlocked position the block engages only one rail. The block is secured in the unlocked position by a stud which is snap engageable with a recess on the block.

Abstract: A caster is provided with a lock clip, which, when operable, joins the caster and a caster holder to prevent oscillatory movement therebetween. A first axle joins the caster body and the caster holder, the axle including a base frame at the bottom thereof which is receivable within the caster body. A rubber damper between the caster body and the base frame provides a shock absorbing effect between these two elements.

Abstract: Shock absorbing apparatus for use on a wheelchair of the type having a frame mounted on a pair of front wheels and a pair of rear wheels in which the front wheels and/or back wheels are provided with shock mounting assemblies. The shock mounting assemblies include one or more spring assemblies attached to the frame to cushion shock on the respective wheel.

Abstract: The lower end of each of the front legs (1) of a baby carriage is fabricated of a hollow pipe and vertically directed. A rotary yoke (13) supporting a wheel (15) is held by and attached to the front leg (1) to surround the lower end of the front leg (1) so that it is rotatable around the axis of the lower end of the front leg (1). The rotary yoke (13) is also vertically movable and, when subjected to the action of a cushion spring (6) received in the lower end of the front leg (1), allows the cushioning action to be exerted. Further, there is provided an operating lever (22) for selectively inhibiting the rotary yoke (13) from rotating to change the direction of the wheel (15).

Abstract: A shock resistant caster includes two structures one of which is connectable to a unit to be supported, and the second of which carries a wheel and is connected to the first structure for pivotal movement relative thereto. A cushion formed of elastomeric material is positioned to be compressed upon imposition of a load on the caster, to attain a cushioned support of the load, and may be held in position by a locating pin connected to one of the two relatively movable structures and extending through a passage in the cushion. The wheel preferably has an elastomeric portion formed of a material which is softer than the elastomeric material of the cushion, with the overall effect of the entire assembly being to produce a ride which is soft under low load conditions and becomes progressively stiffer in non-linear fashion as the load increases to optimize the support of the carried unit under all conditions.

Abstract: A cast with an inherent function of automatically changing the direction of a wheel (11) is selectively stopped. A severe shock applied to the wheel (11) cancels the lock on the wheel (11) against the change of direction. In response to such shock, a wheel attaching member (12) is turned around the axis of a pivot shaft (13), whereby a key member (20) held by the wheel attaching member (12) escapes from a fitting recess (29a or 29b) formed in a fixed bushing (27). As a result, the rotary bracket (4) is allowed to rotate around the vertical shaft (5).

Abstract: A resilient bearing support is provided for suitcase rollers and the like. A single part made of resilient material is configured to rotatably support travel rollers in a lower fork-like projection. The tip of this part is connected to a lower corner of a frame of a suitcase. To facilitate desired shock absorbing characteristics, the part is provided with a transversely extending triangular opening. The shortest side of this opening is bounded by a thin wall section that is curved outwardly to accommodate flexure of this wall during compression of the part. The other two sides of the triangular opening are curved inwardly to roll on one another to increase the resistance of the bearing part to compression in response to increasing loads.

Abstract: A driverless guided vehicle movable along a guide path includes a wheel support device for supporting a wheel disposed in rolling engagement with a floor. The wheel support device is resiliently mounted on a body of the guided vehicle for vertical movement relative thereto. A detecting means for detecting the guide path and sensible markings along the guide path is fixedly secured to the wheel support device.