Insole

Details Insole Insole

1983-10-13

1985-09-17

Schroeder, Werner H.

Boots, shoes, and leggings

Insoles

Laminated

36 91, 128615, 128621, 128622, A43B 1338, A43B 1340

Patent

active

045411840

ABSTRACT:
An insole includes an abrasion-resistant fabric top covering adhered to a layer of molded modified dense polyurethane contoured to provide maximum shock absorption under those areas of the foot most subject to impact loading and a minimum thickness of polyurethane under the remaining portions of the foot. In addition, a series of grooves extending primarily parallel to the axis of the foot are formed in the lowermost surface of the shock absorbing polyurethane. These grooves provide volume into which the polyurethane may deform during impact, thereby enhancing the shock absorbing qualities of the material.

REFERENCES:
patent: 1158693 (1915-11-01), Landolt
patent: 1387691 (1921-08-01), Davenport
patent: 1676355 (1928-07-01), Saperston
patent: 1702531 (1929-02-01), Ambill
patent: 1804009 (1931-05-01), Gregarek
patent: 1808461 (1931-06-01), Gregarek
patent: 2631387 (1953-03-01), Shaw
patent: 3457659 (1969-07-01), Coleman
patent: 3594929 (1971-07-01), Stohr
patent: 3730169 (1973-05-01), Fiber
patent: 4232457 (1980-11-01), Mosher
patent: 4316335 (1982-02-01), Giese et al.
patent: 4364188 (1982-12-01), Turner et al.
patent: 4378642 (1982-04-01), Light et al.

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