Shock absorbing insole construction

Details Shock absorbing insole construction Shock absorbing insole construction

1985-07-10

1986-12-09

Kee Chi, James

Boots, shoes, and leggings

Insoles

Laminated

36 71, 128595, 4283148, A43B 1340

Patent

active

046271791

ABSTRACT:
A shock absorbing insole construction including an upper layer of plastic material having a storage modulus which is about 100 times the storage modulus of a lower layer of material and both materials having a relatively high loss factor. In its more particular aspects, the upper layer is a poly(ethylene-vinyl acetate) and the lower layer is a viscoelastic polyurethane polymer.

REFERENCES:
patent: 1517610 (1924-12-01), Bayless
patent: 2146888 (1939-02-01), Fisch
patent: 2545062 (1951-03-01), Whittington
patent: 2909854 (1959-10-01), Edelstein
patent: 3143812 (1964-08-01), Bittner
patent: 3624930 (1971-12-01), Johnson et al.
patent: 3730169 (1973-05-01), Fiber
patent: 4062131 (1977-12-01), Hsiung
patent: 4268980 (1981-05-01), Gudas
patent: 4345387 (1982-08-01), Daswick
patent: 4541184 (1985-09-01), Leighton
patent: 4541186 (1985-09-01), Mulvihill

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