Construction for ultra-thin orthotic

Details Construction for ultra-thin orthotic Construction for ultra-thin orthotic

1998-03-11

2000-08-15

Kavanaugh, Ted

Boots, shoes, and leggings

Boots and shoes

Resilient or flexible shoe

36 245, 36 31, 36 44, A43B 1314

Patent

active

061017434

ABSTRACT:
A thin orthotic insert having a rigid rearfoot plate and a flexible forefoot cushion which are joined together without requiring a separate top cover. A connection is formed by a slot at the forward edge of the plate which receives and holds the rearward edge of the cushion layer. The rearfoot plate may be formed as a laminated structure, with forward edges of the upper and lower laminate layers being separated to form the wall portions above and below the slot. To form the slot, a spacer is inserted between the edges of the layers and then withdrawn after molding/curing. Because the need for a top cushion is eliminated, very low thicknesses can be achieved, on the order of 1.5 mm. The device is particularly advantageous for use in women's high-heeled shoes, where interior volume is extremely limited.

REFERENCES:
patent: 1602903 (1926-10-01), Hartwell
patent: 1618283 (1927-02-01), Hartwell
patent: 1642878 (1927-09-01), Hartwell
patent: 1669901 (1928-05-01), Hartwell
patent: 4942679 (1990-07-01), Brandon et al.

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