Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
David S. Krafsur0
Francis E. LeVert0
Date of Patent
January 9, 2007
0Patent Application Number
110474460
Date Filed
January 31, 2005
0Patent Citations Received
Patent Primary Examiner
Patent abstract
A fluid flow system for a spring-cushioned shoe is disclosed. The sole of the shoe includes a vacuity, a spring disposed within the vacuity, and a fluid passageway in fluid communication with the vacuity. The fluid flow passageway allows fluid, such as air, to escape the vacuity when the volume of the vacuity is reduced during a foot strike.
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