Thrust producing shoe sole and heel

Details Thrust producing shoe sole and heel Thrust producing shoe sole and heel

1978-09-18

1980-12-09

Kee Chi, James

Boots, shoes, and leggings

Soles

Cushion

36 29, 36 35B, A43B 1318, A43B 1320, A43B 2128

Patent

active

042376254

ABSTRACT:
A thrust producing shoe sole and heel having fluid-proof cavities respectively located in the heel portion and in the sole portion which underlies the metatarsal ball area of a foot for which the sole and heel is sized, the two cavities being connected by a restricted passageway. The material underlying the two cavities at the bottom of the sole and heel is resilient and wear-resistant. Fluid, either gas or liquid, is contained within the cavities and passageway in such pressure and amount as to cause bulges below the normal bottoms of the sole and heel, whereby at rest a foot on the sole and heel is cushioned comfortably on the fluid in the bulges, and in walking fluid under bulge producing pressure alternates through the passageway between the two cavities, producing shock absorption and an alternate lifting effect by the bulges which provides forward thrust both in the heel portion and the metatarsal ball area that facilitates walking.

REFERENCES:
patent: 508034 (1893-11-01), Moore
patent: 547645 (1895-10-01), Lacroix
patent: 586155 (1897-07-01), Bascom
patent: 850327 (1907-04-01), Tauber
patent: 1278320 (1918-09-01), Ellithorpe
patent: 1605985 (1926-11-01), Rasmussen
patent: 2532742 (1950-12-01), Stoiner
patent: 2549343 (1951-04-01), Stoiner
patent: 2605560 (1952-08-01), Gouabault
patent: 2677904 (1954-05-01), Reed
patent: 2863230 (1958-12-01), Cortina
patent: 3044190 (1962-07-01), Urbany
patent: 3871117 (1975-03-01), Richmond et al.
patent: 4071963 (1978-02-01), Fukuoka

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