Zero pressure device such as tires or run-flat rings

Details Zero pressure device such as tires or run-flat rings Zero pressure device such as tires or run-flat rings

1976-12-17

1978-11-14

Ivy, C. Warren

Stock material or miscellaneous articles

Structurally defined web or sheet

Including components having same physical characteristic in...

152157, 152310, 428305, 428315, 521 51, 521173, C08G 1848, C08G 1814

Patent

active

041256603

ABSTRACT:
A zero pressure device is composed of either a microcellular or homogeneous polyurethane made by reacting an organic polyisocyanate with at least three polyols, a monomeric polyol of 2 to 3 hydroxyls having a molecular weight of less than 250, a polyester polyol of 2 to 3 hydroxyls having a molecular weight of 800 to 3000 and a polyether polyol of 2 to 3 hydroxyls having a molecular weight of 4 to 7000. When the zero pressured device is a run-flat ring for a tire-wheel assembly, it has an average density of 60 to 65 pounds per cubic foot and 30 to 42 pounds per cubic foot when it is a tire.

REFERENCES:
patent: 3022810 (1962-02-01), Lambe
patent: 3523918 (1970-08-01), Gonzalez
patent: 3605848 (1971-09-01), Lombardi
patent: 3661811 (1972-05-01), Hardy
patent: 3664976 (1972-05-01), Evans
patent: 3823833 (1974-07-01), Chung
patent: 3892691 (1975-07-01), White
patent: 3929730 (1975-12-01), Graefe
patent: 3939106 (1976-02-01), Dunleavy
patent: 3994329 (1976-11-01), Masson
patent: 4020001 (1977-04-01), White

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