Fluid system having multiple pump chambers

Details Fluid system having multiple pump chambers Fluid system having multiple pump chambers

2005-10-19

2008-08-12

Patterson, Marie (Department: 3728)

Boots, shoes, and leggings

Boots and shoes

Ventilated

C036S00300B, C036S029000

Reexamination Certificate

active

07409779

ABSTRACT:
A fluid system for an article of footwear or other products is disclosed. In one aspect of the invention, the fluid system includes a pump chamber and a pressure chamber. The pump chamber is formed to exhibit a four layer structure to imparts an expandable configuration. The four layers are bonded to each other such that the sidewall has a zigzag-shaped configuration. In another aspect of the invention, the fluid system includes two pump chambers and a pressure chamber in order to increase the resulting pressure in the pressure chamber. In yet another aspect of the invention, at least one of the two pump chambers has an expandable configuration.

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