Abstract: A castor wheel cover is provided for mounting on a wheel of a castor wheel assembly. The wheel has an outer surface and the castor wheel cover includes a floor engaging member having inner and outer surfaces. First and second sidewalls projecting from corresponding first and second side edges of the floor engaging member so as to define a channel therebetween. The channel is adapted for receiving the outer surface of the wheel therein.

Abstract: The invention relates to a double roller (1) with two running wheels (2) and one carrier housing (3), wherein an assembly journal (6) is arranged on the carrier housing (3). An actuating tappet (15) can be displaced in the assembly journal against a spring force, interacting with a counter locking part (65) for directional and/or complete fixation. Furthermore, a running wheel braking part (25) with engaging parts (37, 38) is provided for blocking the rotation of the running wheels (2). The running wheel braking part (25) is likewise actuated by the actuating tappet (15) and furthermore the housing section (4) accommodating the actuating tappet (15) includes a ball bearing (8) on the upper side and surrounds the actuating tappet (15) at least partially toward the bottom. In order to enhance a double roller of this type, it is proposed to have the counter locking part (65) inserted underneath the ball bearing (9) in the part of the housing section (4) that opens only in regard to the inner opening.

Abstract: A method and apparatus are disclosed for providing a castor for a shopping cart. The apparatus includes a first wheel member and a second wheel member arranged in a side-by-side configuration on either side of a central wheel housing, each of the first and second wheel members is arranged to rotate about a common axis. The apparatus also includes an elongate sleeve member extending through the housing and connecting the first and second wheels together whereby the wheels rotate together.

Abstract: A castor includes a castor body, two rollers rotatably mounted on the castor body and each having an annular toothed locking section, a locking member movably mounted on the castor body and having two locking flanges each having a toothed engaging portion, and a brake handle pivotally mounted on the castor body to drive the toothed engaging portion of each of the locking flanges of the locking member to engage the toothed locking section of the respective roller. Thus, when the brake handle is pressed to stop rotation of the rollers, the resting face of the pivot base abuts the support rib of the castor body so that the brake handle is operated smoothly and stably without producing vibration during operation of the brake handle, thereby enhancing the braking effect of the castor.

Abstract: A style of lawn glider that consists of a table and chairs which travel forward and backward as one gliding frame over a second lower frame which rests on a reasonable flat surface. The use of four hard wheels, which roll in between four lower concave tracks that are part of the lower frame and four convex tracks that are part of the upper frame, provide the gliding action. The lower frame provides a retractable transport wheel system that allows easy relocating of the entire mechanism. A cloth guard system provides a way of preventing unintentional contact with moving parts. The current glider is made of wood and common fasteners, but it could be made of other materials such as plastic, metal or composite materials. Seat cushions and overhead sun shade are considered part of this product. The glider is designed to be packaged and sold in a kit form.

Abstract: A supportive medical walking aid for indoor use consisting of two small caster wheels located in-line with adjustable, collapsible seat and handle bars. The invention is viewed as a long term lifestyle enhancing tool rather than a temporary rehabilitative or therapeutic device. Locomotion is provided only by a walking action of the infirmed person. The device is collapsible and light weight for easy transport and storage. Seat and handle bar placement geometry to facilitate comfortable walking, standing and forward leaning as in easy resting. Frame consisting of a front near vertical steering member with caster wheel rotatably attached; a rear member with caster wheel rotatably attached and a horizontal member vertically pivotally attached to the rear member and rotatably and releasably attached to the lower end of the front member. The adjustable, collapsible seat is attached to the rear member and the handlebar assembly is attached to the front member.

Abstract: The invention consists of a caster comprises a yoke having a weight transferring tab and a wheel with groove for receiving the tab. Preferably, the yoke and wheel are made out of plastic, and in some embodiments two different types of plastic. A tab and groove helps transfer the weight of the load on the castor away from the arms of the yoke and onto the wheel. In a preferred embodiment the plastic wheel is molded so as to include a shaft on either side that snap into receiving holes in the yoke, thus avoiding the need for separate axel and rivets.

Abstract: A double-pedal double-wheel truckle with independent braking and releasing functions is a truckle for a precision instrument and comprises a body, a rotating & locking device, a truckle body device, a braking device and a bottom cover body. The body is provided for disposing a rotating & locking device, a truckle body device, a braking device and a bottom cover body. With the independent braking and releasing functions of the braking device of the body, the user can easily operate and stably block the rotating & locking device and the truckle body device. The bottom cover body is provided for preventing foreign matters from entering inside the truckle body device, so that the truckle suitable for a precision instrument can keep a stable and safe static state. By such arrangements, it can achieve the objectives, such as easy operation, easy to distinguish braking state, stable braking, reducing noises, strengthening structure and safe usage, etc.

Abstract: A carriage including an articulated caster is disclosed. The carriage supports a load and includes a frame with a load-supporting section, base sections, and a linkage that permits relative pivotal movement therebetween. The linkage includes a transverse section that pivotally interconnects at least two of the base sections and a longitudinal section that pivotally interconnects the transverse section and the load-supporting section. The linkage permits relative pivotal movement so that at least two of the carriages may cooperatively support the load and substantially share the load over an uneven surface.

Abstract: An apparatus for supporting an object includes a base assembly and at least three wheels pivotally attached to the base assembly. A pivot arm includes a flange plate at an upper end for attachment to the object. An opposite lower end of the pivot arm includes a universal joint for pivotal motion about two perpendicular axes that is attached to the base assembly. A brake assembly is attached to the pivot arm. The brake assembly includes a first disengaged position and a second engaged position that is latched. When the brake assembly is in the second position, a brake pad is forced downward below a level of a surface and into frictional engagement with the surface. More than one apparatus can also be attached to an adapter plate to provide greater floatation. Pivotal attachment to a support beam is also described.

Abstract: A low profile roller includes a wheel mounted on a hollow hub and having a roller ball mounted within the hollow hub. The roller is configured to function in a first, low profile operating mode when the roller ball is in contact with a support surface and in a second, high profile mode when the wheel is in contact with the support surface. A base for a movable support platform includes a base frame and a pivot sleeve rotatably mounted to the base frame and non-rotatably mounted to an arm connected to the hub. The pivot sleeve is configured to rotate the low profile roller from between the first mode and the second mode. A butterfly foot pedal is operably connected to the pivot sleeve.

Abstract: A dual wheel caster is disclosed that comprises a housing having a pair of opposed angled sides, a pair of wheels with one of the wheels being mounted to one of the angled sides and the other one of the wheels being mounted to the other one of the angled sides, and a step portion connected to the housing.

Abstract: A multiple directional wheel includes a frame having a central hub rotatable about a main axis, a plurality of roller supports radially spaced from the central hub, and a plurality of rollers evenly spaced around the circumference of the wheel and rotatably mounted on the roller supports. The rollers are preferably rotatable about a corresponding plurality of roller axes aligned in the plane of the wheel and transverse to the main axis. Preferably, the frame is integrally formed in a first molding process and the rollers are formed in place on the wheel about the roller supports in a separate process. In another embodiment there is disclosed a multiple directional wheel including a pair of opposed, separately integrally-formed first and second frames.

Abstract: A castor includes a body, a wall of a rotary bearing, a wheel including an orifice, a rotary shaft, elements for mounting the shaft to co-operate with the bearing wall, the latter having a first bearing wall portion of tuning-fork-shape defining a slot between two limbs and another bearing wall portion having a base and a tenon secured to the base, the tenon may be engaged in the slot. The elements include two oblong holes formed in the limbs and a third oblong hole formed in the tenon. The holes are arranged in the limbs, and in the tenon in such a manner that all three of them are centered on a first axis when the tenon is engaged in the slot. The shaft passes through the bearing wall so that its axis is substantially parallel to the first axis and can be engaged in the orifice in the wheel.

Abstract: A caster for providing rolling support including a spring-loaded mount. The caster may be substantially concealed in the bottom edge of a hinged, swinging door, and generally located proximate to the free vertical edge of the door. An elongated spring plate is provided as a mount for a roller, causing the roller to accommodate variations in the floor surface, maintain contact with the floor, and support the door. The spring plate has a first portion adapted to be mounted to the bottom edge of a door, and a second portion depending from the first portion. An axle is mounted to the second portion, inside a hub that is mounted to the roller. The axle may be substantially parallel to the first portion of the spring plate. Single roller and double roller caster assemblies are provided.

Abstract: A hubless caster assembly includes a caster body and at least one wheel, the wheel comprising a toroidal member having a bearing race, and a complementary bearing race supported by the caster body. Bearing elements in the races support the wheel in free rotation. The caster body may comprise a ring body having an axial opening, whereby the caster assembly has a large central aperture extending entirely therethrough. A centering ring may be secured in the axial opening with the complementary bearing race formed therein. A hub cap with visual treatment may be secured over the central aperture.

Abstract: An apparatus for supporting an object includes a base assembly and at least three wheels pivotally attached to the base assembly. A pivot arm includes a flange plate at an upper end for attachment to the object. An opposite lower end of the pivot arm includes a universal joint for pivotal motion about two perpendicular axes that is attached to the base assembly. A brake assembly is attached to the pivot arm. The brake assembly includes a first disengaged position and a second engaged position that is latched. When the brake assembly is in the second position, a brake pad is forced downward below a level of a surface and into frictional engagement with the surface. More than one apparatus can also be attached to an adapter plate to provide greater floatation. Pivotal attachment to a support beam is also described.

Abstract: A caster for shopping and transport trolleys which are suitable for conveyance on travelators, includes a wheel fork provided with fork arms and carrying an axle body having a round cross-section and extending through a hub which is arranged between the fork arms and on which two running wheels are mounted, the hub having a crosspiece arranged between the running wheels and the outer contour of the crosspiece having a cylindrical or other geometrically uniform shape, and comprising at least one supporting means arranged on at least one of the two fork arms and intended to support the caster when its running wheels are located in the grooves—separated by bridge pieces—of the conveyor belt of a travelator, wherein, measured from the floor, the lowermost boundary of the crosspiece of the hub is arranged higher than the contact surface of the at least one supporting means.

Abstract: A dual wheel assembly is provided at corners of an item of luggage to facilitate pulling of the luggage in various directions by means of a handle such as a telescopic handle for the luggage.

Abstract: Problems in a conventional wheel of a traveling structure are solved, which in a traveling toy, the lateral movement cannot be performed reducing a game fascinating aspect and it is difficult to differentiate the toy from other traveling toys, and when a field is furrowed with a cultivator, upon completion of the furrowing at the field end, the cultivator has to be revolved at the field end to form the next furrow, so that an additional field area is required or when the additional area is not available, a field portion is generated where the furrow cannot be formed. A wheel for a traveling structure comprises an auxiliary-wheel carrier that rotates when the traveling structure proceeds straight and revolves, and a plurality of auxiliary wheels attached to the auxiliary-wheel carrier rotatably in a direction perpendicular to the rotational direction of the auxiliary-wheel carrier, part of the auxiliary wheels being exposed from the external peripheral surface of the auxiliary-wheel carrier.

Abstract: A chair caster in the invention mainly includes a wheel holder, a spindle, a wheel axle, two wheel bodies, two shake-proof washers and two caps. Each of the two wheel bodies is provided with a recessed chamber disposed in an inner side thereof and capable of being fitted with a shake-proof washer made of a soft rubber material, thereby enabling the chair caster to lower shaking and noise in rolling under the resilience of the shake-proof washers and providing better strength to the whole structure of the chair caster so as to prolong the working life.

Abstract: A chair caster in the invention mainly includes a wheel holder, a spindle, a wheel axle, two wheel bodies, two shake-proof washers and two caps. Each of the two wheel bodies is provided with a recessed chamber disposed in an inner side thereof and capable of being fitted with a shake-proof washer made of a soft rubber material, thereby enabling the chair caster to lower shaking and noise in rolling under the resilience of the shake-proof washers and providing better strength to the whole structure of the chair caster so as to prolong the working life.

Abstract: A high-load, high-performance, twin-wheeled central-braking caster for a bed is provided having two wheels each comprised of an aluminum core disc and an annular cylindrical flange. The inside of the flanges are covered with elastomeric material in order to serve as brake drums for the wheels. The caster has a central braking mechanism comprising a spring-loaded double-armed brake lever mounted on a pivot pin to guide the brake lever so that it pivots exclusively about a horizontal axis perpendicular to the direction of the wheels' forward rolling movement. The central braking mechanism further comprises a pivot block with an aperture for receiving the pivot pin for mounting the brake lever. The braking mechanism further comprises two compression springs having sufficient spring force to bias the double-armed brake lever away from the wheel.

Abstract: A castored base (18) for an office chair includes a plurality of radially extending legs (300), each leg having a socket or sleeve (308) fixed thereto adjacent an outer end thereof. A castor (302/402) is connected to each socket or sleeve (308), each castor having two wheel portions (312/412) and an axle assembly (316/404). The axle assembly includes an axle (314/414) to which the two wheel portions are rotatably mounted in spaced disposition and including a pin (318/418), wherein the pin (318/418) of each castor is received in a respective socket or sleeve (308) which extends at least in part between the two wheel portions (312/412). Only a small clearance is required between the underside of the legs (300) and the tops of the castors (302/402). Further, low profile legs (300) may be used in the base (18), while still providing the required strength and stability.

Abstract: A heavy duty wheel-axle assembly for industrial trolley carts in which wheel assemblies are mounted at either end of an axle, an inner bearing race of each wheel positively non-rotationally secured to the axle by interengagement of a non-round shaped position of the axle fitting into a corresponding opening in the race. A hex shape on one end is used to fix one wheel assembly, held by a bolt threaded into a threaded axial bore in the one end of the axle. A pin is inserted into one of a series of axial hub in the hub outside face to engage one side of the bolt hex head. A tee head on the other end of the axle is fit into a recess in the outside face of the other but to establish a non-rotative connection.

Abstract: A caster with a structural improvement includes a wheel holder, a spindle seat, a spindle and two wheels. A through hole of the spindle seat is covered on a spindle housing of the wheel holder with a ring groove of the spindle seat engaged by an annular flange of the spindle housing, further the spindle is inserted into the spindle housing with at least one ring groove of the spindle engaged by at least one circumferential ridge of the spindle housing, and finally axle housings of the wheels are inserted by a wheel axle of the wheel holder with a ring groove of the wheel axle engaged by a circumferential ridge of the axle housings, whereby the wheels can swivel and move. Moreover, the spindle seat can be assembled with wheel holders and wheels of various sizes, thereby reducing the costs of new molds for spindle seats of different sizes.

Abstract: A dual wheel assembly is provided at corners of an item of luggage to facilitate pulling of the luggage in various directions by means of a handle such as a telescopic handle for the luggage.

Abstract: A miracle curb climber includes a casing having a top connecting bolt for screwing to a front or a rear axle of a walking aid, such as a handcart, a wheelchair, an electric wheelchair, a wheeled power chair, etc., at least one front pilot wheel and at least one main land-contacting wheel mounted into front and rear end of the casing, respectively, and at least one relaying wheel mounted in the casing between the pilot wheel and the land-contacting wheel. The front pilot wheel and the relaying wheel have diameters smaller than that of the main land-contacting wheel and are suspended in the air in front of the main land-contacting wheel, enabling the main land-contacting wheel to smoothly climb up a raised obstacle, such as a curb or a threshold, at a reduced angle of climbing without causing violent vibration or sway of the walking aid.

Abstract: A caster assembly that can be used with furniture to support the furniture and to make the furniture mobile. The caster assembly has a housing with a stem that extends upwardly to be attached to the particular piece of furniture. Within the housing is a plurality of spherical rollers that are supported within the housing so as to be rotatable about their center points and therefore can rotate in any direction as the furniture is moved. In the preferred embodiment, there are three spherical rollers that are all equidistant from the center line or longitudinal axis of the stem so that the weight of the furniture that bears down upon the stem is supported equally by the spherical rollers contacting the floor. As a further feature, a glide cup is provided that can be readily attached and detached from the bottom of the housing and, whet attached, the glide cup covers the spherical rollers and presents a flat, planar surface that contacts the floor.

Abstract: A dual wheel assembly is provided at each corner of an item of luggage to facilitate pulling of the luggage in any direction by means of a handle such as a telescopic handle of the luggage.

Abstract: A wheel rack improvement of a trolley suitcase includes a pair of corner seats and a central seat secured to the lower portion of the suitcase. The corner seats each has a main prop and subordinate prop rotatably secured therein and overlapped each other. The central seat has a footboard rotatably secured by a link and a rotor, a pair of axial pipes spacedly secured to the back of the central seat each including a male pipe and a female pipe axially sleeve with each other. An insertion rod engageable with a positioning hole of the subordinate prop biased by a spring. A steel wire has a first enlarged head retained in a slot of the insertion rod and a second enlarged head retained in a slot of the rotor for controlling the insertion rod the engage or disengage with the positioning hole of the subordinate prop. Therefore, the props may separate with each other to make a four wheels touching the ground.

Abstract: A set of add-on front castors or casters, configured for attachment to a conventional three wheeled jogging stroller. The add-on front castor set includes a crossbar with a first crossbar end, a second crossbar end and a mid-crossbar. A first castor mounts proximate the first crossbar end and a second castor mounts proximate the second crossbar end The add-on front castor set also includes a fork clamp that mounts proximate the mid-crossbar. The fork clamp is attachable to a front wheel fork of the jogging stroller. The front wheel fork is configured to accept a hubbed axle of the single forward wheel that is detachable to so that the front wheel fork can receive the fork clamp of the add-on front castor set. The fork clamp of the front castor set is attached to the front fork by first inserting the front fork between a top clamp plate a bottom clamp plate. A clamp screw threads between the top clamp plate and the bottom clamp plate, and a clamp knob is mounted to an end of the clamp screw.

Abstract: A set of add-on front castors or casters, configured for attachment to a conventional three wheeled jogging stroller. The add-on front castor set includes a crossbar with a first crossbar end, a second crossbar end and a mid-crossbar. A first castor mounts proximate the first crossbar end and a second castor mounts proximate the second crossbar end. The add-on front castor set also includes a fork clamp that mounts proximate the mid-crossbar. The fork clamp is attachable to a front wheel fork of the jogging stroller. The front wheel fork is configured to accept a hubbed axle of the single forward wheel that is detachable to so that the front wheel fork can receive the fork clamp of the add-on front castor set. The fork clamp of the front castor set is attached to the front fork by first inserting the front fork between a top clamp plate a bottom clamp plate. A clamp screw threads between the top clamp plate and the bottom clamp plate, and a clamp knob is mounted to an end of the clamp screw.

Abstract: A fixing device for wheel seats of a baby stroller engaged and fixed each with/on one of the wheel seats, it has a fixing rod secured on the bottom of a foot. The fixing rod has one of its ends protruded down and out from a pipe mouth of the foot, the end is provided at least with a transverse slot. More than one push buttons are provided respectively in the transverse slots of the fixing rod and are displaceable transversely in the transverse slots. An elastic member is received in receiving holes on the push buttons. When the two push buttons are transversely pushed in the transverse slots, they are endued with elastic restoring function. When the foot with the fixing device thereon is extended in the axle hole of the wheel seat, the push buttons are appropriately pushed outwardly by the elastic member to have the bottom of the wheel seat limited by the push buttons from dropping. Assembling and dismantling of the wheel seats are very convenient.

Abstract: A castor comprises a fork (10) carrying an axle (11) which extends through an aperture in both limbs (12 and 13) and by which a single wheel comprising two discs (14 and 15) is mounted on the fork (10). A roller bearing (22) is mounted on the axle (11). Each disc, (14, 15) comprises a radially outwardly extending annular disc portion (23, 24) and a tubular portion (25, 26) which projects to one side of the respective disc portion (23, 24). The tubular portions (25 and 26) are snap-fitted together, one within the other, and together form the single wheel which has two rims (27 and 28). The roller bearing (22) is fitted into the bore of the tubular portion (26) whereby the single wheel is supported thereon for rotation. The tubular portion (26) provides a plain bearing support for the tubular portion (25) of the other disc (14). Relative angular movement between the discs (14 and 15) is possible because of that.

Abstract: A caster structure for cases including a coupling frame and a plurality of rollers. The coupling frame is comprised of a curved plate and two protective covers extending from the lateral edges of the bottom side of the plate such that they define a clearance therebetween. The rollers are pivotally mounted on the protective covers in the clearance. The outer circumferences of every two adjacent rollers form a level line and may come into contact with the ground surface simultaneously to facilitate pulling and provide a steadier movement.

Abstract: An all-plastic, swivel caster assembly has horn and stem molded as a homogeneous unit of plastic. A wheel of molded plastic or plastic-rubber combination, supports the assembly. In one version, the horn sidewalls have fingers forming keyhole-shaped slots receiving grooved end portions of a plastic axle borne by the wheel. The axle retaining fingers normally secure the axle in the horn, but are sufficiently resilient to enable intentional removal of the wheel and axle assembly from the horn without tools, for cleaning. In another version, the horn sidewalls have apertures receiving a plastic axle which has a head on one end and a circumferential groove at the other end. An axle cap located at the outside face of one horn sidewall has a slot received on the axle groove, and retains the axle in assembly. The cap has a detent boss received in a detent recess in the horn sidewall to keep the cap, and thereby the axle, in place.

Abstract: An improved dual wheel caster assembly is provided having a limited slip frictional clutch to create rotational coupling between the two wheels, but with sufficient slippage to allow adequate directional maneuverability. The caster has improved resistance to flutter due to the rotational coupling between the wheels.

Abstract: The present invention relates to a safety device for a baby walker which has a main wheel and an auxiliary wheel. By using a main wheel lock plate and a telescopic pipe, a ratchet on the main wheel can be prevented from blocking by a lock block under normal circumstances. While moving on a slope the lock plate will block the ratchet by its own weight to control baby walker without sliding. By using an auxiliary wheel lock plate and a fixed spring, the lock can also be blocked in normal circumstances. The auxiliary wheel can be suspended in the air and the movable shaft always faces toward the motion direction. In this way, the baby walker will not fall on a hollow ground (such as stairs) and will automatically stop sliding on a slope, with the lock block blocking the auxiliary wheel ratchet and auxiliary wheel friction surface.

Abstract: A caster for supporting an object on wheels is provided with a brake that is operable between engageable and disengageable positions. The brake alternatively restricts and permits rotation of the caster wheel relative to a moveable swivel element. The brake includes a brake pad operated by movement of an operating member located externally on the operating components of the caster. A detent system provides detents for alternatively holding the brake in both the engaged and disengaged positions.

Abstract: A luggage case has a bottom wall supported on four swivel wheels that permit the luggage case to be turned in any direction about a vertical axis. Two of the swivel wheels are part of a leading wheel assembly, and two of the swivel wheels are part of a trailing wheel assembly. Each wheel assembly has a one-piece molded plastic base including an elongated plate extending transversely of the bottom wall of the luggage case and attached thereto, and a pair of downwardly open protective cups surrounding respective swivel wheels. A retractable handle system includes a fixed portion mounted on the top wall of the case, and a movable portion having a handle that may be extended and tilted upwardly for pulling the case along the ground.

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: A roller mechanism for supporting an article on a support surface for selective movement thereon. The roller mechanism including a support member rotatably connected to the article to be supported, a bearing for providing antifriction rotation between the support member and the article to be supported, an axle or axles connected to the support member, and a plurality of roller elements mounted about the support member in a generally circular pattern, each roller element being independently rotatable about an axle.

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: To fasten a seam of sheet material, a seam roller is positioned over a seam of roofing material having overlapping portions of sheets of roofing material which are forced together as rollers pass over. Each of a plurality of rollers is mounted to rotate around a horizontal roller axis in circumferentially spaced apart relationship with each other at an angle to the radii of their circles of rotation, which circle is in a plane at an angle to the horizontal. With this arrangement, the rollers apply a forward pulling action on the seam roller, and apply a pressure to the sheet material in a sweeping motion that removes air.

Abstract: A double wheel caster for being rotatably mounted on a leg of a transport carrier includes a support rod having a center portion and opposite first and second end portions. The center portion of the support rod is rotatably positioned within an opening located in a wheel caster trailing housing. A pair of caster wheels are rotatably positioned on the first and second end portions of the support rod. Each caster wheel has an aperture generally centrally located therethrough and a plurality of fingers extending radially inward and into engagement with the support rod such that the caster wheels are frictionally mounted on the support rod. Upon movement of the transport carrier in a direction which forces one caster wheel to rotate faster than the other, the frictional mounting inhibits the one caster from freely rotating with respect to the other to thereby prevent shimmying.

Abstract: The self-orientatable twin castor has a support made of plastics for a pair of coaxial wheels. The support is constituted by a tubular hub with which a substantially semicircular wall, arranged in the median plane of the castor, is rigidly associated in a perpendicular manner. A semi-cylindrical casing made of metal is associated with the edge of the wall and has wings for positioning and retaining it on the edge of the semi-circular wall.

Abstract: A twin caster, in particular a steering caster, having a carrier (3), wheels, and a vertical mounting pin (22), the wheels being held via an axle (6) on the carrier (3) and the carrier (3) supporting the mounting pin (22), a brake element (32) being furthermore arranged on the carrier (3). For simplified construction, easier assembly, and a development which takes up high brake forces without damage, the carrier (3) is developed in disk shape and have an opening (39) for lateral insertion in the form of a plug/back-grip connection for the brake element which is developed as brake ram (32).

Abstract: A steering roller arrangement for a trackless floor vehicle in the form of a so-called three-wheeled vehicle is described. With this vehicle, in addition to two running wheels, a steering roller is provided which can be swiveled about a vertical axis by means of a ring mount for traveling in a curved line and to achieve a trailing effect. Relative to the rotatable part of the ring mount, the steering roller is movable between two opposite trailing positions such that, with a reversal of the direction of travel, the required alteration of the steering roller trailing effect is brought about by a corresponding adjustment of the steering roller. In this way uncontrolled veering of the vehicle is avoided which occur with conventional three-wheeled vehicles on account of the rotation of the steering roller by 180.degree. caused by the trailing effect of the steering roller. The steering roller is expediently displaceable in a straight line by a linear guide between the two trailing positions.