Air-trapping insoles

Details Air-trapping insoles Air-trapping insoles

1984-08-30

1986-05-27

Schroeder, Werner H.

Boots, shoes, and leggings

Boots and shoes

Ventilated

36 44, A43B 706

Patent

active

045906890

ABSTRACT:
A cushion-like, shock-absorbent insole for footwear comprises two vinyl sheets forming an airtight compartment and sealing therein one or more sheets of resilient foam. Vent holes arranged in at least one of the vinyl sheets, preferably at the heel and metatarsal areas, act as metering valves in conjunction with the inside surface of the shoe sole so that air trapped in the foam material cannot instantaneously escape and both cushioning and massaging are provided.

REFERENCES:
patent: 2713214 (1955-07-01), Gulaskie
patent: 2917844 (1959-12-01), Scholl
patent: 3457659 (1969-07-01), Coleman
patent: 3716930 (1973-02-01), Brahm
patent: 3785069 (1974-01-01), Brown
patent: 4123855 (1978-11-01), Thedford
patent: 4192086 (1980-03-01), Sichak
patent: 4215492 (1980-08-01), Sandmeier
patent: 4224746 (1980-09-01), Kim
patent: 4336661 (1982-01-01), Medrano

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