Shoe sole construction

• US 4,100,686 A
• Filed: 09/06/1977
• Issued: 07/18/1978
• Est. Priority Date: 09/06/1977
• Status: Expired due to Term

• Current Assignee: Gary A. Eston, Jim Stoesser, Thomas E. Freeman, Thomas E. Sgarlato
• Original Assignee: Gary A. Eston, Thomas E. Freeman, Thomas E. Sgarlato
• Inventors: Freeman, Thomas E., Eston, Gary A., Sgarlato, Thomas E.
• Primary Examiner(s): Guest, Alfred R.
• Application Number:
  US05/830,690
• Time in Patent Office: 315 Days
• Field of Search: 36/29, 36/44, 36/28
• US Class Current: 36/29
• CPC Class Codes: A43B 13/20 Pneumatic soles filled with a compressible fluid, e.g. air, gas inflatable linings for skiboots A43B5/0407

Abstract

A shoe sole construction is provided with a flexible bladder which is only partially filled with a non-compressible fluid. Preferably the fluid is water. The partially filled water bladder allows the water to flow from one portion of the bladder to other portions of the bladder during the walking cycle to provide proper support and maximum comfort and stability for the wearer of the shoe.

Claims

1. A shoe construction comprising:

(a) a sole means defining a recessed area;

(b) a flexible bladder defining a fluid tight cavity, said bladder disposed within said recessed area; and

(c) a volume of liquid disposed within and only partially filling said fluid tight bladder cavity whereby liquid may freely flow from one portion of said cavity to another portion of said cavity.

2. A shoe construction as set forth in claim 1 wherein said sole means comprises a lower sole member having raised side walls defining said recessed area;

and an upper insole member extending over said recessed area and fixedly secured to said side walls.

3. A shoe construction as set forth in claim 2 wherein said volume of water occupies less than 75% of said bladder cavity.

4. A shoe construction as set forth in claim 3 wherein said volume of liquid occupies less than 75% of said bladder cavity.

5. A shoe construction as set forth in claim 4 wherein said flexible liner is constructed of a closed cell neoprene material and said bladder is constructed of a thin vinyl material.

6. A shoe construction as set forth in claim 1 wherein said volume of liquid comprises water and occupies less than 75% of said bladder cavity.

7. A shoe construction as set forth in claim 2 wherein said volume of liquid occupies less than 75% of said bladder cavity.

8. A shoe construction as set forth in claim 1 wherein said volume of liquid comprises water and occupies 20% to 60% of said bladder cavity.