| 摘要 |
<p>AIR-CUSHION SOLE An air-cushion insole for a shoe provided by an envelope having a sole portion with a sole compartment, and a heel portion with a heel compartment separate from the sole compartment. A first valve operatively interconnects the sole compartment with ambience. A second valve operatively interconnects the sole and heel compartments. The heel portion includes a first port operatively interconnecting the heel compartment with ambience. Elements that are compressible and expandable under pressure are located in the sole and heel compartments. An air passage operatively interconnects the second valve with a second port formed in the sole compartment. Upon compression of the sole compartment and its compressible element, air is exhausted from the sole compartment through the second port and into the air passage, and thence through the second valve into the heel compartment. Upon compression of the heel compartment and its compressible element, the second valve is closed and the air is exhausted through the first port to ambience. At the same time, upon relief of compression from the sole compartment and its expandable element, air is drawn through the first valve from ambience into the sole compartment. Upon relief of compression from the heel compartment and its expandable element, air is drawn from ambience through the first port and into the heel compartment.</p> |
