Footwear construction
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United States of America Patent
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Oct 13, 2020
Grant Date -
Mar 7, 2013
app pub date -
Sep 27, 2011
filing date -
Sep 2, 2011
priority date (Note) -
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Abstract
A footwear article having a cartridge enclosing a fluid, the cartridge including a cartridge inlet and a cartridge outlet, and a fluid circulation system for circulating the fluid into the cartridge inlet and out of the cartridge outlet. The fluid circulation system may include a pump having a pump inlet in fluid communication with the cartridge outlet and a pump outlet in fluid communication with the cartridge inlet. Preferably, the cartridge further encloses particulate matter suspendable in the fluid. The pump may be a bellows pump. The cartridge is preferably interchangeable and can be attached and detached from the footwear article.
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