Shoe insole

Details Shoe insole Shoe insole

1998-06-12

2000-02-08

Sewell, Paul T.

Boots, shoes, and leggings

Insoles

36 44, 36 71, A43B 1338

Patent

active

060215879

ABSTRACT:
A shoe insole is composed of a toe portion, a sole portion and a heel portion. The insole has a thickness of 2 mm or more. The toe portion and the sole portion have a hardness value ranging between 20 and 45 degrees in the Asker Type C, whereas the heel portion has a hardness value ranging between 30 and 50 degrees in the Asker Type C. The hardness values of the toe portion, the sole portion and the heel portion are decreased by at least 5 degrees for an increase in the thickness of the insole by 1 mm.

REFERENCES:
patent: 4783910 (1988-11-01), Boys, II et al.
patent: 4815221 (1989-03-01), Diaz
patent: 4833795 (1989-05-01), Diaz
patent: 4907355 (1990-03-01), Allen et al.
patent: 5319866 (1994-06-01), Foley et al.
patent: 5367791 (1994-11-01), Gross et al.
patent: 5709954 (1998-01-01), Lyden et al.
patent: 5843268 (1998-12-01), Lyden et al.

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