Abstract: The invention relates to a device for coupling a tire pump to a valve of a tire and for providing a fluid flow path from said pump to said valve, comprising a pump nipple for covering said valve. The device comprises an elastic band coupled to a body of said device, said band being embodied for positioning around said tire under elastic force. A preferred embodiment comprises a set of device and at least two pump nipples for use with the device. The invention also relates to a method of inflating a tire.

Abstract: The device will be placed on the outside surfaces of the tire of a car or truck in the event that the car or truck is stuck either in sand or other soft surface or pothole. On either end of the device will be a pair of shoes or flat surfaces that will grip the surface as the tire begins to rotate. Once the tire is safely out of the problem area and back on a sold road surface, the device is removed and then stowed. The device can be used on any tire of any type of vehicle.

Abstract: A portable escape device is provided for self-rescue in the case of an auto tyre being trapped in a pit. The portable escape device includes support posts, a clamping device fitted to the support posts, and a jacking device fitted to the clamping device. The support posts are fixedly mounted onto spokes. The clamping device clamps an auto tyre. The jacking device protrudes and extends out of a top face of a tyre portion. The portable escape device can release the trapped auto tyre and perform self-rescue fast and reliably, and it is convenient to carry.

Abstract: An apparatus providing auxiliary traction to a riding lawnmower or similarly light off-road vehicle having a drive wheel with a hub anchored to a drive axle. The apparatus generally includes at least one traction bar having a pair of traction ends equally spaced beyond the outer circumference of the wheel. The traction bar anchored to a carrier mounted to the hub of the drive wheel. A traction bar of variable length may be achieved by having two traction arms, one telescopically received within the other, with a length-locking means such as retainer pins inserted through aligned bores extending through the overlapping traction arms and the carrier mounted to the hub.

Abstract: An anti-skid device for a tire of a vehicle wheel includes an anti-skid raceway designed to be placed on the circumferential tread of the tire. An elongate element extends in sliding manner through rear attachment means arranged along the periphery of the rear edge of the raceway. Means for tightening the raceway include at least one guide member passing through the raceway to let a part of the elongate element slide freely transversely to the raceway, in front of the front edge of the raceway, elastically extensible means arranged along the elongate element, and securing means to connect at least one end of the elongate element to the front element.

Abstract: A device and method for increasing tire friction is provided. The device is especially suitable for use on slippery roads, such as roads which have snow and/or ice. The device is permanently secured to the vehicle wheel assembly and easily installed over the tire for use. The device has a plurality of friction grips which independently move from an inactive first position secured to a sidewall of a housing center of the device to an active second position secured over the tire of the vehicle wheel assembly.

Abstract: A tire chain tightener for use on automotive, truck, or other vehicle traction chains and similar devices. The tire chain tightener has an length of elastic material with a hook attached to each end. Intermediate hooks are spaced along the elastic material between the two ends. One of the ends may be uniquely marked with instructions for correct installation of the tire chain tightener. When correctly installed, a tire chain tightener with N+1 hooks will form a symmetrical N pointed star inscribed in the circumference of the tire chains. The star is further centered about the tire. The tire chain tightener exerts a centering force on the tire chains. Since only one hook at a time is installed, the effort to install the tire chain tightener is reduced, enabling people of limited strength to install them.

Abstract: A tightening system (135) for use with anti-skid and traction devices for wheeled vehicles comprising a sealed tightening mechanism (130) which can clutch and ratchet the rotational movement applied by the user on a knob (212). The system further comprises at least one connection assembly (134) which is adapted to be pivotably and releasably attached to a proximal end of a surface contact member (63;71) and which is adapted to be connected to the tightening mechanism. The tightening mechanism comprises a locking component (193) which has a base plate (240), an inner sidewall (195) and an outer sidewall (194) standing perpendicular to said base plate (240). The inner sidewall recessed portion has a plurality of recess (230;231) which are adapted to engage with a peripheral projection of the upper clutch (206) for holding the knob in place during locked and unlocked positions of the knob.

Abstract: A tightening system of straps for use in anti-skid and traction enhancement devices is disclosed. The tightening system comprises a central node which is located on the principle axis of the axle of a wheel and which has a plurality of extensions adapted to fasten a plurality of radially extending straps around its periphery. A plurality of radially extending flexible straps, which are attached to a surface contact member at their first 10 ends and to the central node at their second ends, are used to tighten the anti skid device. The flexible straps are passed through a buckle for tightening the surface contact members in the radial direction in order to eliminate outward bulging on the surface contact members as well as to avoid eccentricity in the strap system.

Abstract: A tire chain tightener for use on automotive, truck, or other vehicle traction chains and similar devices. The tire chain tightener has an length of elastic material with a hook attached to each end. Intermediate hooks are spaced along the elastic material between the two ends. One of the ends may be uniquely marked with instructions for correct installation of the tire chain tightener. When correctly installed, a tire chain tightener with N+1 hooks will form a symmetrical N pointed star inscribed in the circumference of the tire chains. The star is further centered about the tire. The tire chain tightener exerts a centering force on the tire chains. Since only one hook at a time is installed, the effort to install the tire chain tightener is reduced, enabling people of limited strength to install them.

Abstract: An attachment system for a snow chain is disclosed, comprising a rolling track (1, 2a, 2b, 12) joined to a plurality of connecting arms (3) converging towards a common central structure (4), wherein a plurality of elastic ropes (5) forming elastic attachments between said plurality of connecting arms (3) and an anchoring ring (7) fixed to a rim (C) of a wheel, and wherein at least an inextensible linear element (9) is further provided, which may be engaged with or disengaged from a working position in which it is apt to replace the elastic attachment of at least one of said elastic ropes (5) with an inextensible attachment.

Abstract: A tire traction device securing apparatus having a plurality of elastic tensioning arms extending radially from a central hub, each of the plurality of elastic tensioning arms removably attachable to a tire traction device to provide a tension force directed toward the central hub to secure the tire traction device to the tire. In an embodiment, the plurality of arms and central hub are of an elastomeric material to form a monolithic body; coupled to each tensioning arm of the monolithic body is a hook to removably attach the tire traction device securing apparatus to the tire traction device and thereby secure the tire traction device to the tire.

Abstract: A tire traction device securing apparatus having a plurality of elastic tensioning arms extending radially from a central hub, each of the plurality of elastic tensioning arms removably attachable to a tire traction device to provide a tension force directed toward the central hub to secure the tire traction device to the tire. In an embodiment, the plurality of arms and central hub are of an elastomeric material to form a monolithic body; coupled to each tensioning arm of the monolithic body is a hook to removably attach the tire traction device securing apparatus to the tire traction device and thereby secure the tire traction device to the tire.

Abstract: The present invention relates to an apparatus used for tightening tire chains. One embodiment of the present invention includes an outer portion and an inner portion. The outer and inner portions have a plurality of first and second apertures, respectively. A plurality of arms are secured onto the inner portion and extend through the second aperture and then through the first apertures. The arms have a first end which is adapted to be secured onto the inner portion, and a second end which is adapted to secure to a tire chain. A bar variably couples the outer portion and the inner portion. The distance between the outer and inner portions adds or subtracts tension in the arm which correspondingly adds or subtracts tension in the tire chain.

Abstract: A tightening system (135) for use with anti-skid and traction devices for wheeled vehicles comprising a sealed tightening mechanism (130) which can clutch and ratchet the rotational movement applied by the user on a knob (212). The system further comprises at least one connection assembly (134) which is adapted to be pivotably and releasably attached to a proximal end of a surface contact member (63;71) and which is adapted to be connected to the tightening mechanism. The tightening mechanism comprises a locking component (193) which has a base plate (240), an inner sidewall (195) and an outer sidewall (194) standing perpendicular to said base plate (240). The inner sidewall recessed portion has a plurality of recess (230;231) which are adapted to engage with a peripheral projection of the upper clutch (206) for holding the knob in place during locked and unlocked positions of the knob.

Abstract: A tire traction device securing apparatus having a plurality of elastic tensioning arms extending radially from a central hub, each of the plurality of elastic tensioning arms removably attachable to a tire traction device to provide a tension force directed toward the central hub to secure the tire traction device to the tire. In an embodiment, the plurality of arms and central hub are of an elastomeric material to form a monolithic body; coupled to each tensioning arm of the monolithic body is a hook to removably attach the tire traction device securing apparatus to the tire traction device and thereby secure the tire traction device to the tire.

Abstract: A traction device for vehicle tires is provided for when the vehicle is stuck in mud, snow, ice or similar terrain, comprising an adjustable support member having a first end and a second end; a connection member extending from the first end of the support member, wherein the connection member is connectable to a wheel; a shaft extending from said second end of said support member; and a traction member rotatably mounted to the shaft, wherein the traction member includes one or more tire-gripping portions. A double-ended embodiment of the traction device is also disclosed for providing greater traction in appropriate situations.

Abstract: An attachment system for a snow chain is disclosed, comprising a rolling track (1, 2a, 2b, 12) joined to a plurality of connecting arms (3) converging towards a common central structure (4), wherein a plurality of elastic ropes (5) forming elastic attachments between said plurality of connecting arms (3) and an anchoring ring (7) fixed to a rim (C) of a wheel, and wherein at least an inextensible linear element (9) is further provided, which may be engaged with or disengaged from a working position in which it is apt to replace the elastic attachment of at least one of said elastic ropes (5) with an inextensible attachment.

Abstract: A slip-preventing device of a tire has a plurality of arm frames each of which is contacted with an inner sidewall, a tread and an outer sidewall of the tire. The arm frame has a link unit at a side of the outer sidewall of the tire. The arm frames are linked with each other by the link units.

Abstract: A tire cable chain system is disclosed. The tire cable chain system includes a continuous and unbroken outboard annular holder; a tensioning cable adapted to form at least one tensioning cross member and a continuous and unbroken inboard annular holder disposed in physical contact with the outboard annular holder; a first receiver guide disposed on the outboard annular holder and adapted to receive the tensioning cable; a second receiver guide disposed on the inboard annular holder and adapted to receive the tensioning cable; a hub having a tensioned spool shaft connected to the tension cable; at least one stabilizing cable connected to the hub and the outboard annular holder; and at least one cross member disposed at a physical connection between the outboard annular holder and the inboard annular holder.

Abstract: A vehicle tire-traction apparatus has a pair of tire-traction sections wherein each tire-traction section has a generally arcuate member for placement over a vehicle tire outer sidewall. Each tire-traction section has a plurality of arm members attached to the arcuate member such that the arm members are transverse to the arcuate member and extend radially. Each tire-traction member also has a plurality of finger members wherein each finger member is attached to a corresponding arm member such that the finger member is angulated with respect to the arm member and extends over the vehicle tire tread and a portion of the vehicle tire inner sidewall. Each tire-traction section has a plurality of tire-tread contact members. Each tire-tread contact member is attached to a corresponding finger member and extends over a portion of the vehicle tire tread. Each tire-tread contact member is located between the finger member and the vehicle tire tread.

Abstract: A nonskid device for the wheels of vehicles, has a holding element (1) situated in the region of the wheel axis and used with elastic holding arms (2) holding a chain mesh (4). A tension cable (7) is used to introduce tension forces into the holding arms (2). In order to introduce a defined tensile stress into the tension cable (7), the tension cable is connected to a pivotable tension lever (12).

Abstract: A tire cable chain system is disclosed. The tire cable chain system includes a continuous and unbroken outboard annular holder; a tensioning cable adapted to form at least one tensioning cross member and a continuous and unbroken inboard annular holder disposed in physical contact with the outboard annular holder; a first receiver guide disposed on the outboard annular holder and adapted to receive the tensioning cable; a second receiver guide disposed on the inboard annular holder and adapted to receive the tensioning cable; a hub having a tensioned spool shaft connected to the tension cable; at least one stabilizing cable connected to the hub and the outboard annular holder; and at least one cross member disposed at a physical connection between the outboard annular holder and the inboard annular holder.

Abstract: A slip-preventing device of a tire has a plurality of arm frames each of which is contacted with an inner sidewall, a tread and an outer sidewall of the tire. The arm frame has a link unit at a side of the outer sidewall of the tire. The arm frames are linked with each other by the link units.

Abstract: An apparatus for preventing a slipping of a tire is disclosed.

Abstract: A method and apparatus for securing snow tire chains to tires. Two cables are secured to snow tire chains secured about at least one tire utilizing a securing mechanism. The two cables are secured to the securing mechanism utilizing a connecting mechanism integrated with the securing mechanism. The cables are connected to the snow tire chains by a tensioning mechanism integrated with the securing mechanism. The securing mechanism is centrally mounted along a side of the tire. The securing mechanism can be configured with a chamber for receiving the cables within the securing mechanism. The tension mechanism is generally centrally located within the securing mechanism. The cables can be attached to the snow tire chains utilizing an attachment mechanism.

Abstract: In accordance with the present invention, the traction device 10 includes mounting plate assembly 30, and cleats 40. Mounting assembly 30 comprises plate 31 and center ring 35. Plate 31 and center ring 35 are made of steel aluminum alloy or other heavy-duty material capable of withstanding the stresses to be encountered during the application of the invention. Tabs 32 are part of plate 30. As an example they may be formed by bending and folding material up 90 degrees from the plate surface during the manufacturing process. Center ring 35 fits down over and is welded to tabs 32 such that after assembly, holes 37 in center ring 35 will match holes 38 in tabs 32. Each cleat 40 is a single piece of steel or another heavy-duty material capable of withstanding the stresses expected to be encountered during the application of the invention. Cleats 40 are manufactured such that a portion of each cleat 40 is bent and folded to form a gripping element 41.

Abstract: A method and apparatus for securing snow tire chains to tires. Two cables are secured to snow tire chains secured about at least one tire utilizing a securing mechanism. The two cables to secured to the securing mechanism utilizing a connecting mechanism integrated with said securing mechanism. The cables are connected to the snow tire chains by a tensioning mechanism integrated with the securing mechanism. The securing mechanism is centrally mounted along a side of said a tire. The securing mechanism can be configured with a chamber for receiving the cables within said securing mechanism. The tension mechanism is generally centrally located within said securing mechanism. The cables can be attached to the snow tire chains utilizing an attachment mechanism.

Abstract: The present disclosure concerns an emergency traction device that may be easily and securely fitted on vehicles having tires of different diameters and widths. A single winch sizes and secures the traction device for the proper tire diameter and then for the proper tire width. Traction can be further enhanced with members that substantially circumscribe the tire. Operation of the traction device can be enhanced by providing nonreversible gearing for operating the winch.

Abstract: An anti-skid apparatus for a tire is provided. The anti-skid apparatus includes a traction member that is positionable across the tread of the tire and a fastening assembly which is connected to the first and second ends of the traction member and extended through an opening in the wheel on which the tire is mounted. The fastening assembly tightens the traction member to maintain the traction member in engagement with the tread of a tire. A modified tire rim having a passageway extending therethrough for use with the anti-skid apparatus of the present invention is also provided.

Abstract: A self-tensioning device for snow chains (2) for vehicles includes an outer element (3) closable in a ring, suitable to be placed on the outer side of the wheel (1), an inner element closable in a ring, suitable to be placed on the inner side of the wheel (1), inner and outer elements being joined by variously composed elements (10) creating the traction on the tread, the outer element having a terminal portion (7) passing through a non-return device (5) which makes it slide only in the chain tensioning direction and not in the opposite slackening direction, a storage block (20) containing an elastic element (21) able to hook, tension and retain the terminal portion (7) being provided on the outer ring.

Abstract: An emergency traction device is easily and securely fitted on vehicles having tires of different diameters and widths. A single winch sizes and secures the traction device for the proper tire diameter and then for the proper tire width.

Abstract: A device for mounting 3-railer snow chains having three runners on a set of double truck tires which are mounted on an outside wheel and an inside wheel. The device includes a non-elastic strap, a first wheel hook connected to a first end of the non-elastic strap for hooking the device to the inside wheel rim of the inside wheel, and a second wheel hook connected to a second end of the non-elastic strap for hooking the device to the outside wheel rim of the outside wheel. The device also includes a tightening mechanism such as a ratchet device for tightening the strap on the tires, and three chain hooks connected along the length of the strap. Each of the three chain hooks are positioned to engage one of the runners of the 3-railer snow chains. By driving forward or otherwise rotating the tire, the snow chains are tightly wrapped around the tire.

Abstract: An anti-skid device. The device is installed between tire pairs in vehicles using dual tires in wheel assemblies. The device increases friction between the wheeled vehicle and a slippery surface therebelow. Each of the two or more dual tire type wheel assemblies has a wheel having a central axis of rotation, a first tire, and a second tire. The first and second tire are mounted to the wheel in a spaced apart relationship along the axis of rotation, to provide therebetween a centrally located mounting space which is located radially outward from the central axis of rotation. The anti-skid device is placed in the mounting space between the first tire and the second tire. The anti-skid device includes, in radially outward order, a retainer ring, a spacer ring, an inflation ring (preferably pneumaticaly inflatable), and an anti-skid tread ring. The anti-skid tread ring is displaceable outward by inflation of the inflation ring, so as to engage the slippery surface with tread lugs or studs.

Abstract: A tire traction enhancement system 10 is provided comprising tire chains 2 which include an outboard circumferential elongate element 4 and an inboard circumferential elongate element 6 between which are attached a plurality of transverse traction members 8. Ends 5, 7 of the elements 4, 6 are releasably attached via an outboard connection subsystem 29 and an inboard connection subsystem 20, respectively. The outboard connection subsystem 29 includes a first cable guide 30 attached to a first end 5 of the outboard element 4 and second cable guide 80 attached to a second end 5 of the outboard element 4. A cable 50 extends from the first end 5, around the second cable guide 80 and then around the first cable guide 30 before the cable 50 extends to attach to a mid-portion of the outboard element 4. The cable 50 routing configuration amplifies closure force A which draws the ends 5 of the outboard circumferential element 4 together.

Abstract: An emergency vehicle traction device for improving the traction of an automobile wheel having laterally communicating hub apertures. The device comprises a traction member preferably comprising a chain for improvement of the wheel's traction, a flexible rope or strap for wrapping around the inside of the wheel and through a hub aperture, and a novel fastener member for holding the traction device in place on the wheel. The fastener member comprises one or more rope binding channels and one or more rope binder adapted to bind a free end of the rope member, and thereby to hold the traction device securely in place. A preferred embodiment of the traction device further comprises a retrieval tool adapted to pass through the hub aperture and to draw the free end of the rope through the wheel by engaging an eye provided on the free end of the rope. No more than two or three traction devices according to the disclosure are needed to move a vehicle out of even the worst predicaments.

Abstract: The vehicle tire chain structure is disclosed, which includes a plurality of cross chains which are arcuately spaced about the tire tread, and held in place by rope connectors, each of which are connected to the successive inboard and outboard ends of the cross chains. The assembly is held in place by an additional spreader rope, and its associated connecting elements, to facilitate the tightening of the assembly, and maintaining same in a taut condition during prolonged periods of use. The tire chain structure is assembled on the vehicle tire without jacking up or movement of the vehicle.

Abstract: A tire chain assembly including two stays hinged at one end on a housing and supporting wall chains which hold tread chains in place on the tread of the tire when they are pulled tight as the stays are drawn together by a resilient linkage. Arms or resilient linkages control displacement and vibration of the stays when the wheel is moving. The device enables gripping equipment to be fitted quickly and easily and is suitable for use on snow-covered, muddy, sandy, or vegetation-covered terrain.

Abstract: A tire traction improvement apparatus is provided for installation on a wheel-mounted vehicle tire and includes a base assembly which includes a base plate. A fulcrum post projects from the base plate a predetermined distance from the base plate. A pair of first tire-gripper assemblies are attached to the base assembly and are oriented with respect to each other on the base assembly at a predetermined orientation angle. Each of the first tire-gripper assemblies includes a first tread-gripper portion. A guide element receives a radially adjustable second tire-gripper assembly which includes an adjustable extension portion which has a proximal end and a distal end. The adjustable extension portion includes a plurality of adjustment apertures arrayed between the proximal end and the distal end. The proximal end of the adjustable extension portion is received by the guide element of the base assembly. The second tire-gripper assembly includes a second tread-gripper portion.

Abstract: The present disclosure concerns an emergency traction device which may be easily and securely fitted on vehicles having tires of different diameters and widths. A first winch sizes and secures the traction device for the proper tire diameter and a second winch sizes and secures the traction device for the proper tire width.

Abstract: A vehicle wheel anti-slip device which is removably mountable on a vehicle for adding traction in snow, ice, etc. The device includes a frame having a generally rigid polygonal shape, a plurality of ground engaging claws including a first leg portion locatable over the perimeter of the vehicle wheel and a second leg portion and at an angle to the first leg portion and locatable over the front side of the vehicle wheel. The device also includes a plurality of support brackets which are pivotally mounted on the frame, and the claws are each pivotally mounted to a respective one of the support brackets. In addition, a tension force device including a tension spring and chords connected to each of the support brackets biases the plurality of claws simultaneously generally towards the center axis of the tire so as to be pressed thereagainst.

Abstract: A traction enhancing device for automobile tires includes a support ring and a plurality of cleat assemblies which are mounted on the support ring. The cleat assemblies include cleat members which extend over the tread portion of a tire and which include projections to enhance traction. The cleat members are able to slide inwardly in the cleat assemblies to accomodate flexing of the tire and the cleat members are attached to the cleat assemblies by latches which facilitate rapid installation and removal of the device without a need for tools of any type or for jacking up of the vehicle.

Abstract: A new and improved apparatus for tightening a chain installed on a tire that is mounted on a wheel of a motor vehicle includes a hub assembly and a plurality of tension assemblies. Each tension assembly includes a first end for connecting to the hub assembly, a tensioning element connected to the first end, and a second end connected to the tensioning element. The second end is connected to a portion of the chain, such that the hub assembly and the tension assemblies exert tension on the chain in a radial direction toward the hub assembly. More specifically, the tension assemblies are attached to the hub assembly and the chain in pairs, and the tension assemblies of each pair are arranged in opposed relation. That is, the first ends of each pair are in opposed relation with respect to the hub assembly, and the second ends of each pair are in opposed relation with respect to the chain. At least one of the tension assemblies further includes a threaded shaft movable within a sleeve.

Abstract: Antiskid apparatus comprising a first doglegged linkage of two rods which are pivotally connected together on one end and a second doglegged linkage of two rods which are pivotally connected together on one end, the linkages being pivotally connected in the middle of the respective rods to form a pantograph. A circular support member is pivotally mounted on the open end of each of the rods, and a thin-plate-shaped gripping member is fixed to each of the support members. Each of the gripping members comprises a ground contact portion that contacts the tire tread and covers at least a part of the width of the tread and a mounting portion that contacts the tire sidewall. In one embodiment, the linkage is held in a specified form by means of a holder, and the apparatus is mounted on the tire by securing hooks of tighteners in positions corresponding to the tire wheel holes, the hooks being provided at the top of the tighteners.

Abstract: An anti-skid device for a vehicle is automatically positioned by securing members 50 which cause the device to pass from an installation position to the operating position in which an anti-skid assembly 70, such as a snow chain arrangement, is arranged on the peripheral surface of the tire 10. The anti-skid device comprises a principal annular section 30 fixed to the anti-skid assembly 70 by arms 40 and arranged in a manner such that the securing member 50 can be fixed to this annular section 30 and can move freely over the circumference thereof.

Abstract: An antiskid device is provided for a vehicle wheel comprising a detachable antiskid rolling track on the periphery of the wheel, a central housing for holding radial linking elements or arms which are also attached to chain guides inserted in said rolling track, and a return member designed to automatically position the rolling track and hold it on the periphery of the wheel. The rolling track comprises resilient elements capable of eliminating the play between the peripheral surface of the tire and said antiskid rolling track.

Abstract: The device includes a flat rigid rectangular frame forming a pair of opposed parallel sleeves. Four traction elements, each having shank and U-shaped hook portions, are provided for telescoping movement of the shanks within the sleeves, to thereby position the hooks transversely across the tread of the tire. A cable and traveling block/threaded shaft arrangement is provided to simultaneously contract all four traction elements at substantially the same rate into gripping engagement with the tire treads. Crossbars, extending chordally on the inboard side of the tire connect the inner ends of the hooks and secure the device onto the tire. The shanks can rotate within the sleeves so that rotation of the tire can twist the hooks into a slanted condition whereby they more tightly grip the tire.

Abstract: An antiskid attachment for use with an automotive wheel having a tire includes a base plate adapted to be positioned on one side of the wheel. A plurality of spaced-apart ground-engaging band members are mounted peripherally around the base plate in cantilevered manner and are adapted to be positioned on the outer surface of the tire. Each of the band members has a transverse hole formed in the free end thereof. A fastening cord is passed through the holes of the band members for releasably tensioning the band members. Tying means is provided for releasably tying the fastening cord to the outside surface of the base plate with the band members tensioned by the fastening cord.

Abstract: A traction-enhancing device that is releasably attached to vehicle tires. A rigid base member having a central core and plural arms radiating therefrom is placed into overlying relation to the side of a tire. Plural flexible cords and rigid rod members in axial alignment therewith interconnect a like number of tread-overlying road-gripping members to a capstan mounted centrally of the base member. Rotation of the capstan draws the road-contacting members radially inwardly into tight-fitting engagement with the tire and effectively creates an enhanced tread. Counter rotation of the capstan enables the road-contacting members to be swung away from the tread so that the device can be removed from the tire.

Abstract: This invention relates to a continuous snow chain comprising three cords or chains disposed in zig-zag patterns and connected to each other in a network of cords or chains of a finite length including two parallel rows of substantially diamond-shaped openings. One cord or chain constituting one boundary of the network of cords or chains is slidably connected to a first retaining cord at each of the zig-zag points constituting the one boundary of the network of cords or chains, which first retaining cord includes means for connecting two extremities thereof to one another. The other cord or chain constituting the other boundary of the network of cords or chains is slidably connected to a second retaining cord at each of the zig-zag points constituting the other boundary of the network of cords or chains, which second retaining cord includes means for connecting two extremities thereof to one another.