Thrust producing shoe sole and heel

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

1980-04-02

1982-11-16

Kee Chi, James

Boots, shoes, and leggings

Soles

Cushion

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

Patent

active

043589022

ABSTRACT:
A thrust producing shoe sole and heel having fluid-proof cavities 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 cavities being connected by restricted passageways. The material underlying the cavities at the bottom of the sole and heel is resilient and wear-resistant. Fluid is contained within the cavities and passageways 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 and running, fluid under bulge producing pressure alternates through the passageways between the cavities, producing shock absorption and an alternate lifting effect by the sole and heel bulges which provides forward thrust both in the heel portion and in the metatarsal ball area that facilitates walking and running. The shape and disposition of the heel bulges and of the metatarsal ball area bulges are such that the sole and heel of the invention exhibits superior lateral stability.

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), Ellithore
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: 3225463 (1965-12-01), Burnham
patent: 3871117 (1975-03-01), Richmond et al.
patent: 4071963 (1978-02-01), Fukuoka
patent: 4237625 (1980-12-01), Cole et al.

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