Boots – shoes – and leggings – Soles – Spring heel
Patent
1995-10-30
1998-02-03
Dye, Rena
Boots, shoes, and leggings
Soles
Spring heel
36 71, 428 366, 428 367, 428 368, 428 69, 428 76, A43B 1312, A43B 1320
Patent
active
057131414
ABSTRACT:
Products in the form of cushioning devices made from flexible membranes employing at least one layer including thermoplastic urethane and at least one layer of a copolymer of ethylene and vinyl alcohol are inflatable to a relatively high pressure. The cushioning devices maintain the internal inflatant pressure for extended periods of time by employing a phenomenon referred to in the industry as diffusion pumping. Ideally, the cushioning devices of the present invention can be permanently inflated with gases such as nitrogen or air.
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Bonk Henry W.
Mitchell Paul H.
Sell, Jr. James C.
Dye Rena
Nike Inc.
Tetra Plastics, Inc.
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