Air cushion shoe sole

Details Air cushion shoe sole Air cushion shoe sole

1987-03-16

1988-02-02

Silbaugh, Jan H.

Metal working

Method of mechanical manufacture

Assembling or joining

291571R, 15624411, 156245, 264512, 264515, 264516, 264244, B29C 6720, B29C 4920, B29C 4904, B32B 110

Patent

active

047221313

ABSTRACT:
An air cushion shoe sole which is preferably blow molded of elastomeric material and has at least one cavity which in cross-section is substantially rectilinear. The cavity has a number of depressions and each cavity has an air valve for introducing a shock absorbing material, namely gas, liquid, or a combination thereof into that cavity. Each air valve has means in it for automatically bleeding off a portion of the shock absorbing material introduced into the cavity once the pressure of that material reaches a predetermined level.

REFERENCES:
patent: 2080469 (1937-05-01), Gilbert
patent: 2743483 (1956-05-01), Parini
patent: 3005272 (1961-10-01), Shelare et al.
patent: 3452125 (1969-06-01), Schuman et al.
patent: 3655849 (1972-04-01), Hayashi
patent: 4219945 (1980-09-01), Rudy
patent: 4263728 (1981-04-01), Frecentese
patent: 4546899 (1985-10-01), Williams

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