Pressurized porous material cushion shoe base
OwnerCharles Petroskyinventor
Life of this patent
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Abstract
An air cushion shoe base has a sole and a vertical rim within which is filled in air tight relation with foam rubber which is tightly covered by an insole. The foam rubber forms small metering orifices for restricting and delaying fluid flowing forward and rearward in response to weight shifts of a foot. A valve is provided within the rim, and the valve has a central body with a long valve orifice and lateral extensions for joining the body to an inside of the rim. The shoe base is filled to a desired pressure which is maintained periodically through the valve. A T-shaped welt extends around an upper peripheral area of the rim and insole for joining the cushion base to a shoe upper.
Claims10
An air cushion shoe base comprising a flexible sole for contacting the floor, a flexible insole positioned above the sole for contacting a foot of a wearer, a rim extending around a periphery of the sole and insole for connecting the sole and insole in airtight relationship, and a flexible porous core of a foam material having cells and fine pores extending across the rim between the sole and the insole for dividing the shoe base into plural small inflatable compartments each filled with foam material, each compartment having small metering pores for flowing fluid through from one section to another section of the core and means joining the sole, the rim, the insole and the core in airtight relationship.
Dependencies are inferred from the claim text.