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US 4,513,803 AGranted
Inflating gas for tires
AssigneeContinental Gummi-Werke Aktiengesellschaft
InventorThorsten Reese
Life of this patent
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AssigneeContinental Gummi-Werke Aktiengesellschaft
InventorThorsten Reese
Estimating the term…
A filling gas for a tire having one or more hollow chambers, especially vehicle tires with a body of rubber or rubber-like material having suitable reinforcement inserts. Sulfur hexafluoride (SF.sub.6) is used as the filling gas, which can also be a mixture of sulfur hexafluoride and one or more other gases, such as air. The tire hollow chamber, in comparison to the air, contains a greater quantity of sulfur hexafluoride. The ratio of air quantity to the quantity of sulfur hexafluoride is in the range of approximately 1:1 to 1:8.5. A relief or venting conduit is provided that extends into the vicinity of the highest location of the tire hollow chamber. Optionally, the rim breakthrough or valve leading to the tire hollow chamber is closed or sealed off. The valve for filling the tire hollow chamber, and the venting device may be arranged as a combined unit with respect to the rim body. The filling gas is introduced into the air-filled tire hollow chamber at an over-pressure; a pressure equalization is then brought about with respect to the atmosphere, and further filling gas is then introduced at over-pressure into the tire hollow chamber. The tire and rim may be permanently connected to each other in a gas-tight manner.
A filling gas mixture for a vehicle tire provided with at least one hollow chamber, especially a vehicle tire, with a body of rubber or rubber-like material provided suitably with reinforcement inserts, the improvement therewith comprising:
A filling gas mixture chemically inert and inactive particularly in vehicle tires inflated therewith and having at least one hollow chamber adapted to receive said gas mixture exclusively in the inflation thereof and a tire body comprising elastomeric material, said filling gas mixture to maintain inflation including particularly therewith sulfur hexa-fluoride (SF.sub.6) having comparatively large molecules of compact octahedral construction which serve to hinder and preclude gas mixture loss and accordingly inflation pressure loss therefrom due to gas mixture permeation and penetration through the elastomeric material, said filling gas consisting of chemically inert and inactive sulfur hexa-fluoride and at least one other gas which is air therewith, said at least one hollow chamber being adapted assuredly to contain a greater quantity of chemically inert and inactive sulfur hexa-fluoride than remaining quantity of air, the ratio of air quantity relative to sulfur hexa-fluoride quantity being approximately in a range of 1:1 to 1:8.6, respectively.
A wheel with a rim supporting thereon a vehicle tire having at least one hollow chamber adapted to receive inert sulfur hexa-fluoride filling gas mixture, said wheel comprising a venting tube which extends into said at least one hollow chamber particularly in the vicinity of the highest point thereof.
Dependencies are inferred from the claim text.