Insole with replaceable pneumatic buffer
OwnerMing-En Tsaiinventor
Life of this patent
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Abstract
An insole includes a heel portion defining a recess. A replaceable pneumatic buffer defining a first and a second tubular elements is received in the recess of the insole. A central tunnel communicating with the first tubular element defines a hole. A plurality of tunnels communicate the first tubular element with the second tubular element. When load is exerted on the buffer, the second tubular element abuts a surface of the shoe, thereby defining a chamber filled with air. When the load increases excessively, air is ventable through the hole of the central tunnel and further off the chamber.
Claims4
An insole including a heel portion defining a recess and a buffer releasably fitting in said recess said buffer comprising:
- a first tubular element extending in a closed curve;
- a first tunnel communicating with said first tubular element and defining a hole;
- a second tubular element extending around the first tubular element;
- and
- a plurality of tunnels, each communicating between the first tubular element and the second tubular element.
An insole including a heel portion defining a recess and a buffer releasably fitted in said recess said buffer comprising:
- a first tubular element extending in a circle;
- a central tunnel communicating with said first tubular element and defining a hole;
- a second tubular element extending around the first tubular element;
- and
- a plurality of tunnels, each communicating between the first tubular element and the second tubular element.
Dependencies are inferred from the claim text.