04817304 is referenced by 330 patents and cites 62 patents.

Footwear having an improved cushioning sole structure is disclosed. The footwear includes an upper and a sole member attached to the upper. The sole member includes a sealed inner member of a flexible material which is inflated with a gaseous medium to form a compliant and resilient insert. An elastomeric yieldable outer member encapsulates the insert about preselected portions of the insert. The inner and outer members function together to form a viscoelastic unit for attenuating the shock and returning the energy of foot impact. A mechanism adjusts the impact response of the unit so that the effect of the insert dominates the impact response function in a predetermined area adjacent at least one side of the insert. The adjusting mechanism includes a gap in the outer member along the side of the insert adjacent the predetermined area so that the flexible material of the sealed inner member can flex in the gap during foot impact.

Title
Footwear with adjustable viscoelastic unit
Application Number
7/90926
Publication Number
4817304
Application Date
August 31, 1987
Publication Date
April 4, 1989
Inventor
Stephen F Potter
Beaverton
OR, US
Daniel R Potter
Beaverton
OR, US
Thomas McGuirk
Lake Oswego
OR, US
Lester Q Lee
Gaston
OR, US
David M Forland
Vancouver
WA, US
Mark G Parker
Beaverton
OR, US
Agent
Banner Birch McKie & Beckett
Assignee
Nike and Nike International
OR, US
IPC
A43B 13/20
A43B 13/18
A43B 13/12
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