Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
  • B60C3/00—Tyres characterised by the transverse section
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
  • B60C7/00—Non-inflatable or solid tyres
  • B60C7/10—Non-inflatable or solid tyres characterised by means for increasing resiliency
  • B60C7/14—Non-inflatable or solid tyres characterised by means for increasing resiliency using springs
  • B60C7/16—Non-inflatable or solid tyres characterised by means for increasing resiliency using springs of helical or flat coil form
  • B60C7/20—Non-inflatable or solid tyres characterised by means for increasing resiliency using springs of helical or flat coil form disposed circumferentially relative to wheel axis

Definitions

• the present invention relates to a tire for automobiles, trucks, aircraft etc., and more specifically to a tyre comprising two laterally spaced treads.
• One object of the present invention is to provide a tire of the kind described in the introduction which is further improved and which has a more robust construction.
• Another object of the invention is to provide a tire which is so pliable that it will engage the road or like rolling surface with both treads even when heavily negotiating a curve.
• a further object is to provide a tire which is of such robust construction that it can be driven upon even in the absence of air-pressure therein, for example in the event of a puncture.
• Still another object is to provide a tire of such robust construction that the thickness of the rubber entailed can be reduced or a softer rubber used.
• the tire according to the proposed invention affords the ad ⁇ vantages provided by a broad tire with regard to stability at the same time as it is able to penetrate down to the road surface and therewith exert a good grip thereon, even when the road or like rolling surface is wet or when water has collected thereon.
• the tire obtains a pliability such that if the tire is tilted when heavily negotiating a curve, the two tire treads will still hold contact with the road or like rolling surface, thereby ensuring good road-holding even in conditions such as these.
• the proposed construction also enables the tire, when suitably constructed, to be used with no air pressure therein, and hence a punctured tire does not prevent the vehicle concerned from being driven.
• the tire thus behaves in a safer manner than conventional tires also in this latter respect. Because of the toroidal bodies formed by a wire the rubber from which the tire according to the invention is formed need not be as thick as that of conventional tires, and hence the tire need not weigh more than a conventional tire and may even be lighter. It is also possible to use a softer rubber than can be used in conventional tires, thereby affording better road-gripping properties.
• Fig. 1 is a radial sectional view of a tire according to the invention.
• Fig. 2 illustrates the construction of the winding in accordance with a first embodiment.
• Fig. 3 illustrates the construction of the winding according to a second embodiment.
• Fig. 4 illustrates the construction of the winding according to a third embodiment. Description of Embodiments at Present Preferred
• the illustrated tire comprises two mutually indentical halves, having two identical road-engaging surfaces (treads).
• Each half comprises a toroidal body 3, 4 formed by a wire, which is the carcass of the tire.
• These toroidal bodies 3, 4 or solids of rotation are disposed in such way that their axes of rotation are in mutual alignment and in alignment with the axis of rotation of the tire and in such way that the distance between the middle planes of the bodies is smaller than the sum of circle radius of the solids of rotation, i.e. the radius of the circles giving the solids of rotations their form by rotation.
• the toroidal bodies are overlapping each other to form a third solid of rotation 15 of segment parts.
• Located between the two identical halves is a steel ring 1.
• a wire 2 made of spring steel is wound helically around the ring 1 according to one embodiment in a manner to form the two toroidal bodies 3 and 4 and the third solid of rotation 15 to form a smaller toroidal body 5 which encloses the ring.
• the steel ring 1 is provided with an aperture through which the wound wire can be threaded.
• the opening 6 can be closed subsequent to placing the wound wire in position and may be locked in its closed state.
• the manner in which the winding is formed is illustrated more clearly in Fig. 2, which shows the helical form in which the wire is laid in order to be threaded on the ring 1.
• the wire is formed with a loop 11 from which there extends an arcuate portion 12 which terminates in a further loop 13.
• the two loops 11 and 12 shall face one another.
• the winding is formed from two spring-steel wires, each of which forms a toroidal body 3 and 4, each comprising exactly the same number of turns.
• the two bodies are then fitted one into the other, to form a third solid of rotation 15, in which each wire-section on both sides thereof borders on a wire- -section belonging to the other toroidal body.
• the winding of the toroidal bodies 3, 4 consists of a plurality of closed rings of wire, which are disposed sequentially along a curved, circular line in a manner to form a toroid. These toroidal bodies 3, 4 then are brought together in overlapping relationship and forming a third solid of rotation 15. Further the closed rings can be connected to each other by means of attachments (not shown).
• the winding of the wire in said embodiments will effectively hold the ring 1 in its correct position between the two tire halves.
• the winding will also hold the two tire halves together strongly, so that they cannot be drawn apart and cause the tire to burst.
• the steel ring may alternatively comprise a closed ring devoid of the aperture 6, in which case the wire 2 is wound around the closed ring with - . -
• the construction proposed in accordance with the invention leaves a space between the two abutment surfaces.
• This interspace has a triangular- -like cross-sectional shape, with the apex of the triangle pointing towards the centre of the tire.
• the side lines of the triangle are defined partly by the road surface and partly by the outer cylindrical surfaces of the toroidal bodies 3 and 4.
• a further ring 8 which is preferably made of steel and which is thinner than the ring 1 but of larger diameter than said ring, said further ring 8 being arranged in the triangular interspace at a deepest location in the apex pointing towards the centre of the tire.
• the ring 8 is provided with a closable opening, which enables the ring to be arranged in the interspace between the two toroidal bodies 3 and 4.
• a cord fabric 7 is then placed tightly against the toroidal bodies 3 and 4 so as to maintain the interspace therebetween.
• the cord-fabric layer may be relatively thin.
• the cord fabric 7 may comprise a conventional fabric wall, or a steel cord covered with rubber.
• a rubber tread is placed on the outside of the cord fabric.
• the tire bead is constructed in the same manner as with a conventionel tire, with a steel-wire core 6.
• the tire according to the invention can be fitted to a conventional wheel rim.
• a space 10 will thus be formed between the rubber piece 9 and the toroidal bodies 3 and 4.
• Air is able to pass freely between the space 10, the voids in the toroidal bodies 3 and 4, and the relatively small space formed in the smaller toroidal body 5.
• the tire construction means that, in principle, air pressure can be excluded, due to the flexural strength of the wire windings. This also means that a puncture of crack in a tire will not prevent the venhicle concerned from being driven.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Tires In General (AREA)
• Metal Rolling (AREA)
• Ropes Or Cables (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=20356401

Family Applications (1)

Country Status (3)

Cited By (1)

Families Citing this family (1)

Citations (7)

• 1984
  • 1984-06-29 SE SE8403485A patent/SE447363B/sv not_active IP Right Cessation
• 1985
  • 1985-06-27 WO PCT/SE1985/000266 patent/WO1986000264A1/en unknown
  • 1985-06-27 EP EP19850903432 patent/EP0188511A1/en not_active Withdrawn

Patent Citations (7)

Also Published As

Similar Documents

Legal Events