Bladder systems with closable fluid line and foot supports including such bladder systems
Bladder systems include a fluid line formed between layers of thermoplastic elastomer. The fluid line may include: (i) a first fluid line region extending in a direction away from a main interior bladder chamber, (ii) a second fluid line region extending from the first fluid line region and in the direction away from the main interior bladder chamber, and (iii) a third fluid line region extending from the second fluid line region. The first and third fluid line regions have a larger transverse cross sectional area than that of the second fluid line region. The fluid line may connect a foot support bladder portion and a fluid reservoir portion in a sole structure/article of footwear. Also, the fluid line may be formed within a flap that extends outward from the main interior bladder chamber (e.g., one of the foot support bladder portion or the fluid reservoir portion).
1 . A bladder system for containing a fluid, the bladder system comprising:
a foot support bladder portion, wherein a heel portion or a midfoot portion of the foot support bladder portion forms an outwardly extending flap;
a fluid reservoir portion;
a first fluid line for moving fluid from the fluid reservoir portion to the foot support bladder portion; and
a second fluid line for moving fluid from the foot support bladder portion to the fluid reservoir portion, wherein a first portion of the second fluid line extends through the flap, wherein a second portion of the second fluid line extends away from the flap, along a medial heel edge of the foot support bladder portion, and to a medial heel region of the fluid reservoir portion, and wherein the second portion of the second fluid line and the first fluid line: (a) extend between the foot support bladder portion and the fluid reservoir portion, (b) are located adjacent one another, and (c) are separated from one another by a seam.
2 . The bladder system according to claim 1 , wherein an area of the flap through which the first portion of the second fluid line extends is less than 1200 mm 2 , and wherein a linear fluid line length of the first portion of the second fluid line within the flap is less than 75 mm long.
3 . The bladder system according to claim 1 , wherein an area of the flap through which the first portion of the second fluid line extends is less than 2000 mm 2 , and wherein a linear fluid line length of the first portion of the second fluid line within the flap is less than 100 mm long.
4 . The bladder system according to claim 1 , wherein the first fluid line extends between the medial heel region of the fluid reservoir portion and a medial heel region of the foot support bladder portion.
5 . The bladder system according to claim 1 , wherein the first portion of the second fluid line that extends through the flap includes an open U-shaped interior fluid channel.
6 . The bladder system according to claim 1 , wherein the first portion of the second fluid line that extends through the flap includes an open interior fluid channel within the flap, the open interior fluid channel having a first arm, a second arm, and a base connecting the first arm and the second arm.
7 . The bladder system according to claim 6 , wherein the first arm defines a first thinned region of the open interior fluid channel and the second arm defines a second thinned region of the open interior fluid channel, wherein the first thinned region is located adjacent the second thinned region.
8 . The bladder system according to claim 1 , wherein the foot support bladder portion, the fluid reservoir portion, the first fluid line, and the second fluid line are thermoformed as a single part.
9 . A bladder system, comprising:
a first thermoplastic elastomer layer joined to a second thermoplastic elastomer layer at one or more seams to form an interior fluid chamber comprising:
a foot support bladder portion, wherein a heel portion or a midfoot portion of the foot support bladder portion forms an outwardly extending flap;
a fluid reservoir portion;
a first fluid line extending between the fluid reservoir portion and the foot support bladder portion; and
a second fluid line extending between the foot support bladder portion and the fluid reservoir portion, wherein a first portion of the second fluid line extends through the flap, wherein a second portion of the second fluid line extends away from the flap, along a medial heel edge of the foot support bladder portion, and to a medial heel region of the fluid reservoir portion, and wherein the second portion of the second fluid line and the first fluid line: (a) extend between the foot support bladder portion and the fluid reservoir portion, (b) are located adjacent one another, and (c) are separated from one another by a portion of the one or more seams.
10 . The bladder system according to claim 9 , wherein the one or more seams forming the interior fluid chamber further define a pump region having a pump chamber connected with the first fluid line, wherein the pump region is partially surrounded by the fluid reservoir portion.
11 . The bladder system according to claim 10 , wherein the pump region is located at a heel support region of the bladder system.
12 . The bladder system according to claim 9 , wherein an area of the flap through which the first portion of the second fluid line extends is less than 1200 mm 2 , and wherein a linear fluid line length of the first portion of the second fluid line within the flap is less than 75 mm long.
13 . The bladder system according to claim 9 , wherein an area of the flap through which the first portion of the second fluid line extends is less than 2000 mm 2 , and wherein a linear fluid line length of the first portion of the second fluid line within the flap is less than 100 mm long.
14 . The bladder system according to claim 9 , wherein the first fluid line extends between the medial heel region of the fluid reservoir portion and a medial heel region of the foot support bladder portion.
15 . The bladder system according to claim 9 , wherein the first portion of the second fluid line that extends through the flap includes an open U-shaped interior fluid channel.
16 . The bladder system according to claim 9 , wherein the first portion of the second fluid line that extends through the flap includes an open interior fluid channel within the flap, the open interior fluid channel having a first arm, a second arm, and a base connecting the first arm and the second arm.
17 . The bladder system according to claim 16 , wherein the first arm defines a first thinned region of the open interior fluid channel and the second arm defines a second thinned region of the open interior fluid channel, and wherein the first thinned region is located adjacent the second thinned region and is separated from the second thinned region by one of the one or more seams joining the first thermoplastic elastomer layer to the second thermoplastic elastomer layer.
18 . The bladder system according to claim 9 , wherein the flap includes a pre-crease region at which the first portion of the second fluid line will pinch to or toward a closed configuration under an applied force.
19 . The bladder system according to claim 9 , further comprising a single inflation port opening into the interior fluid chamber and configured to inflate each of the foot support bladder portion, the fluid reservoir portion, the first fluid line, and the second fluid line.
20 . A sole structure, comprising:
a sole component; and
a bladder system according to claim 1 fixed to the sole component.