US20050150132A1 - Footwear with expanded thermoplastic beads in the footbed - Google Patents
Footwear with expanded thermoplastic beads in the footbed Download PDFInfo
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- US20050150132A1 US20050150132A1 US10/757,874 US75787404A US2005150132A1 US 20050150132 A1 US20050150132 A1 US 20050150132A1 US 75787404 A US75787404 A US 75787404A US 2005150132 A1 US2005150132 A1 US 2005150132A1
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- Prior art keywords
- beads
- sole
- footwear
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- A—HUMAN NECESSITIES
- A43—FOOTWEAR
- A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
- A43B7/00—Footwear with health or hygienic arrangements
- A43B7/14—Footwear with health or hygienic arrangements with foot-supporting parts
- A43B7/1405—Footwear with health or hygienic arrangements with foot-supporting parts with pads or holes on one or more locations, or having an anatomical or curved form
- A43B7/1455—Footwear with health or hygienic arrangements with foot-supporting parts with pads or holes on one or more locations, or having an anatomical or curved form with special properties
- A43B7/146—Footwear with health or hygienic arrangements with foot-supporting parts with pads or holes on one or more locations, or having an anatomical or curved form with special properties provided with acupressure points or means for foot massage
-
- A—HUMAN NECESSITIES
- A43—FOOTWEAR
- A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
- A43B3/00—Footwear characterised by the shape or the use
- A43B3/10—Low shoes, e.g. comprising only a front strap; Slippers
- A43B3/101—Slippers, e.g. flip-flops or thong sandals
- A43B3/102—Slippers, e.g. flip-flops or thong sandals leaving the heel of the foot bare
- A43B3/105—Slippers, e.g. flip-flops or thong sandals leaving the heel of the foot bare characterised by the shape or layout of the toestrap
Definitions
- the present invention relates to footwear such as shoes, sandals, and insoles. Due to the well known nature of these items, a detailed description of the prior art is unnecessary.
- At least one portion of the footwear is filled with small beads that can shift about during normal use.
- the beads are made of expanded thermoplastic such as expanded polystyrene.
- FIG. 1 is a top view of an embodiment of the invention, in the form of a thong sandal.
- FIG. 2 is a side view of the sandal of FIG. 1 .
- FIG. 3 is a top view of a lower sole assembly for use in the sandal of FIG. 1 .
- FIG. 4A is a top view of a bag containing expanded thermoplastic beads (ETBs) for use in the sandal of FIG. 1 .
- EDBs expanded thermoplastic beads
- FIG. 4B is a section view of the bag of FIG. 4A , taken along section line B-B in FIG. 4A .
- FIG. 4C is a section view of the bag of FIG. 4A taken along section line C-C in FIG. 4A .
- FIG. 5 is another top view of the sandal of FIG. 1 .
- FIG. 6A is a section view that shows the internal structures of a first embodiment of the sole of the FIG. 5 sandal, taken along line 6 - 6 in FIG. 5 .
- FIG. 6B is a section view that shows the internal structures of a second embodiment of the sole of the FIG. 5 sandal, taken along line 6 - 6 in FIG. 5 .
- FIG. 6C is a section view that shows the internal structures of a third embodiment of the sole of the FIG. 5 sandal, taken along line 6 - 6 in FIG. 5 .
- FIG. 6D is a section view that shows the internal structures of a fourth embodiment of the sole of the FIG. 5 sandal, taken along line 6 - 6 in FIG. 5 .
- FIG. 7 is a section view, taken along lines 7 - 7 in FIG. 5 , showing details of the construction of the rear strap.
- FIGS. 1 and 2 are, respectively, top and side views of an embodiment of the invention in the form of a thong sandal.
- the illustrated sandal has a sole 12 , and the sole has an upper surface 13 .
- a rear strap 16 is connected to the sole 12 at the rear end of the rear strap.
- a front strap 18 connects the forward end of the rear strap 16 to the sole 12 .
- An outsole 14 serves at the bottom layer of the sole 12 and contacts the ground during normal use.
- FIG. 3 is a top view of a lower sole assembly 30 that is used in the first three embodiments of the sandal. From this top view, only the side wall 32 and the upper surface 34 of the lower sole assembly 30 are visible. The side walls 32 and upper surface 34 define a recess.
- the lower sole assembly 30 preferably comprises rubber, plastic, leather, or any other similarly strong and flexible material.
- FIG. 4A shows a bag 40 that is preferably shaped so that it will fit into the recess described above in connection with FIG. 3 .
- the bag 40 has a thin, flexible outer wall 42 , and is filled with filling 10 (shown in FIGS. 4B and 4C ).
- the wall 42 is preferably made of a lightweight fabric such as a stretch jersey fabric with a weight on the order of about 3.5 to 7 ounces per square yard, which provides a good degree of flexibility and strength.
- the bag 40 may be sealed using any conventional approach (including but not limited to sewed, glued, heat-sealed, etc.).
- FIG. 4A includes button holes 44 that provide a path for the straps 16 , 18 to pass through the bag 40 without disturbing the bag's integrity or its ability to effectively contain the filling 10 .
- This configuration permits the rear strap 16 and the front strap 18 to be connected to the lower sole with a strong and stable connection.
- FIG. 4B is a section view of the bag 40 taken along lines B-B in FIG. 4A , which passes directly through a button hole 44 .
- FIG. 4C is a section view of the bag 40 taken along lines C-C in FIG. 4A , which does not pass through a button hole. Taken together, FIGS. 4A-4C show how the bag wall 42 remains intact despite the presence of the button holes 44 , so as to enclose the filling 10 within the bag.
- the filling 10 is preferably made of expanded thermoplastic beads (ETBs) that are roughly spherical in shape.
- the beads are not amalgamated together (i.e., they are not united or combined into a unified or integrated whole, as they might be in a block of Styrofoam). Instead, the individual beads are preferably free to move about with respect to one another, within the confines of the bag 40 .
- the mean diameter of the ETBs is on the order of 0.8 mm.
- the size distribution of the beads may be tightly centered about the mean diameter, so that most of the beads would measure between about 0.7 and 0.9 mm. Alternatively, the size distribution may vary more widely (e.g., with the size of the beads ranging from 0.6-1.2 mm).
- the average size of the beads is between about 2 ⁇ 3 mm and 1 mm, or even between about a 1 ⁇ 2 and 1.5 mm.
- the shape of the beads may also be varied by, for example, using beads that are roughly oblate instead of spherical.
- a sufficient quantity of beads is included to form a bed that is, on average, at least about one quarter inch thick.
- the filling will have a volume of between about 2-5 cubic inches for adult size sandals, and will contain more than 10,000 beads.
- the preferred packing density for the beads within the bag 40 is preferably low enough so that when a user walks on the sandal, the beads can shift around to some extent (due to the pressure from the user's foot that is transmitted through the flexible walls 42 of the bag 40 ), but high enough so that the user's foot is supported by a layer of beads that is at least a few beads thick.
- the most preferred material for the filling 10 is expanded polystyrene beads
- other types of expanded thermoplastic beads e.g., expanded polypropylene beads
- other materials that share at least some characteristics (e.g., size, shape, and resiliency) with the preferred beads may be used instead of ETBs.
- FIG. 5 is another top view of the sandal of FIG. 1 , with markings to indicate the various section views.
- a rear strap 16 is connected to the sole 12 at the rear end of the rear strap; and a front strap 18 connects the forward end of the rear strap 16 to the sole 12 .
- FIGS. 6A-6D are section views, each taken along section line 6 - 6 in FIG. 5 , of four different embodiments of the sole 12 .
- the sole 12 includes an outsole 14 , a lower sole 36 that is affixed to the outsole, an upper sole 62 , and a bag 40 filled with ETBs.
- the bag 40 is held in place between the lower sole 36 and the upper sole 32 (thereby indirectly retaining the ETBs between the lower sole and the upper sole).
- the outsole 14 may be affixed to the lower sole 36 using, for example, heat-fusing, cementing, or alternative affixing approaches that will be apparent to persons skilled in the relevant arts.
- the lower sole 36 and the outsole 14 taken together, correspond to the lower sole assembly 30 discussed above in connection with FIG. 3 .
- the outsole 14 is preferably made of a flexible and relatively tough material such as leather, rubber, or EVA, or any other material that is conventionally used for outsoles.
- the lower sole 36 is preferably made of a flexible material such as leather, rubber, or foamed plastic, or any other material that is conventionally used for midsoles.
- the sidewalls 32 and the upper surface 34 of the lower sole 36 define a recess.
- the bag 40 rests in that recess and is shaped to match the recess. As discussed above, the bag 40 is preferably filled with ETBs.
- the upper sole 62 is disposed on top of the bag 40 and secured to the lower sole assembly.
- the upper sole 62 is preferably a thin, flexible material (e.g., stretch cotton jersey fabric with a weight on the order of about 3.5 to 7 ounces per square yard).
- Other fabrics or materials may be substituted therefore, including but not limited to knit fabrics, woven fabrics, and flexible leather.
- Such materials are preferably selected so that the upper sole can transmit force from the user's foot to the ETBs in the bag 40 , such that the ETBs can shift around to some extent in response to the changes in pressure that occur during ordinary walking.
- the upper sole 62 is preferably secured to either the lower sole 36 or the outsole 14 (using, for example, adhesives, stitching, or any other approach that provides a relatively strong and permanent connection).
- Suitable attachment surfaces include the outer surface of the sidewall 32 and/or the lower surface of the lower sole 36 and/or the upper surface of the outsole 14 .
- the upper sole 62 is disposed above the bag 40 so as to keep the bag confined in the footbed between the upper sole 62 and the lower sole 36 .
- FIG. 6A depicts a space between the upper sole 62 and the upper wall 42 of the bag 40 , the flexibility of the upper sole 62 will actually cause the upper sole to rest directly on top of the upper wall 42 of the bag 40 . They are depicted separately, however, for explanatory purposes.
- the sandal also includes a rear strap 16 and a front strap 18 .
- the straps 16 , 18 may be connected directly to the lower sole assembly through the gaps in the middle of the button holes 44 .
- the upper sole 62 in these embodiments also includes button holes (not shown) that line up with the button holes 44 of the bag 40 , so the straps can pass through both sets of button holes on their way down to the lower sole assembly. Connecting the straps 16 , 18 directly to the lower sole assembly provides a relatively secure and strong mount for the straps. In these embodiments, the straps may be secured to the lower sole assembly using any of a variety of techniques that are conventionally used for sandals, which will be apparent to persons skilled in the relevant arts.
- neither the bag 40 nor the upper sole 62 has button holes, and the straps 16 , 18 are attached directly to the upper sole 62 (e.g., by sewing the straps 16 , 18 directly to the upper sole 62 ).
- FIG. 6B depicts a second embodiment of the sole, taken along lines 6 - 6 in FIG. 5 .
- the sole 12 includes an outsole 14 , a lower sole 36 that is affixed to the outsole, and an upper sole 62 .
- the volume between the lower sole 36 and the upper sole 32 is filled with ETBs 10 , resulting in an ETB-filled footbed.
- the FIG. 6B embodiment is therefore similar to the FIG. 6A embodiment, except that the ETBs are not confined in a separate inner bag.
- the description of the FIG. 6A embodiment applies in large part to the FIG. 6B embodiment.
- the absence of the inner bag with buttonholes makes it more difficult to attach the straps directly to the lower sole assembly, so variations in which the straps are connected to the upper sole 62 are preferred for this embodiment.
- FIG. 6C depicts a third embodiment of the sole, taken along lines 6 - 6 in FIG. 5 .
- the FIG. 6C embodiment is similar to the FIG. 6B embodiment, except that the lower sole 36 serves as the outsole (in addition to performing its other functions).
- the lower sole 36 taken alone, corresponds to the lower sole assembly 30 discussed above in connection with FIG. 3 . Because only a single material is used, different trade offs between comfort and toughness may be required, as will be apparent to persons skilled in the relevant arts. In addition, appropriate changes to the way the upper sole 62 is connected to the lower sole assembly 30 may be required, as will be apparent to persons skilled in the relevant arts.
- FIG. 6D depicts a fourth embodiment of the sole, taken along lines 6 - 6 in FIG. 5 .
- the FIG. 6D embodiment is similar to the FIG. 6C embodiment, except that the lower sole comprises two separate pieces of material: the sidewalls 32 and the outsole 14 .
- the sidewalls 32 and the outsole 14 taken together, correspond to the lower sole assembly 30 discussed above in connection with FIG. 3 .
- an inner bag may be added to those embodiments to retain the ETBs, similar to the bag 40 (shown in FIGS. 4A-4C ) described above in connection with the FIG. 6A embodiment.
- the straps may be stuffed with the same material that is used to fill the footbed (see reference numeral 10 in FIGS. 6A-6D ), such as the preferred expanded polystyrene beads.
- FIG. 7 depicts a cross section of this type of strap, taken along section line 7 - 7 of FIG. 5 .
- a double-walled construction is used, and both walls 72 , 74 are preferably flexible. Note that although FIG. 7 depicts a space between the inner wall 72 and the outer wall 74 , in practice the walls will touch in many places. They are depicted separately, however, for explanatory purposes.
- the inner wall 72 is hose-shaped, with the ends of the hose closed off to keep the filling 70 contained. Because a double-walled construction is used, the inner hose 72 need not be affixed directly to the sole. Instead the inner hose is contained within an outer hose 74 , and the outer hose is affixed (e.g., sewn, glued, etc.) to the sole 12 .
- intermediate members may be used to connect the outer hose to the sole (e.g., a member with a plug at one end for connecting to the sole and an eyelet at the other end to accept the end of the outer hose).
- a single-walled construction is used, in which case the single wall must be connected to the sole (either directly or through an intermediate member).
Abstract
Footwear (e.g., shoes, sandals, boots, etc.) is constructed with small beads stuffed into the footbed, so that can the beads can shift about due to pressure on the footbed by the user's foot during normal use. Preferably, the beads are made of expanded polystyrene, and have an average diameter between about two thirds and about one mm. The resulting footwear is very comfortable. In some sandal embodiments, the straps are also stuffed with the same type of beads
Description
- The present invention relates to footwear such as shoes, sandals, and insoles. Due to the well known nature of these items, a detailed description of the prior art is unnecessary.
- At least one portion of the footwear (e.g., the footbed) is filled with small beads that can shift about during normal use. In some preferred embodiments, the beads are made of expanded thermoplastic such as expanded polystyrene.
-
FIG. 1 is a top view of an embodiment of the invention, in the form of a thong sandal. -
FIG. 2 is a side view of the sandal ofFIG. 1 . -
FIG. 3 is a top view of a lower sole assembly for use in the sandal ofFIG. 1 . -
FIG. 4A is a top view of a bag containing expanded thermoplastic beads (ETBs) for use in the sandal ofFIG. 1 . -
FIG. 4B is a section view of the bag ofFIG. 4A , taken along section line B-B inFIG. 4A . -
FIG. 4C is a section view of the bag ofFIG. 4A taken along section line C-C inFIG. 4A . -
FIG. 5 is another top view of the sandal ofFIG. 1 . -
FIG. 6A is a section view that shows the internal structures of a first embodiment of the sole of theFIG. 5 sandal, taken along line 6-6 inFIG. 5 . -
FIG. 6B is a section view that shows the internal structures of a second embodiment of the sole of theFIG. 5 sandal, taken along line 6-6 inFIG. 5 . -
FIG. 6C is a section view that shows the internal structures of a third embodiment of the sole of theFIG. 5 sandal, taken along line 6-6 inFIG. 5 . -
FIG. 6D is a section view that shows the internal structures of a fourth embodiment of the sole of theFIG. 5 sandal, taken along line 6-6 inFIG. 5 . -
FIG. 7 is a section view, taken along lines 7-7 inFIG. 5 , showing details of the construction of the rear strap. -
FIGS. 1 and 2 are, respectively, top and side views of an embodiment of the invention in the form of a thong sandal. The illustrated sandal has a sole 12, and the sole has anupper surface 13. Arear strap 16 is connected to the sole 12 at the rear end of the rear strap. Afront strap 18 connects the forward end of therear strap 16 to the sole 12. Anoutsole 14 serves at the bottom layer of the sole 12 and contacts the ground during normal use. -
FIG. 3 is a top view of a lowersole assembly 30 that is used in the first three embodiments of the sandal. From this top view, only theside wall 32 and theupper surface 34 of the lowersole assembly 30 are visible. Theside walls 32 andupper surface 34 define a recess. The lowersole assembly 30 preferably comprises rubber, plastic, leather, or any other similarly strong and flexible material. -
FIG. 4A shows abag 40 that is preferably shaped so that it will fit into the recess described above in connection withFIG. 3 . Thebag 40 has a thin, flexibleouter wall 42, and is filled with filling 10 (shown inFIGS. 4B and 4C ). Thewall 42 is preferably made of a lightweight fabric such as a stretch jersey fabric with a weight on the order of about 3.5 to 7 ounces per square yard, which provides a good degree of flexibility and strength. Thebag 40 may be sealed using any conventional approach (including but not limited to sewed, glued, heat-sealed, etc.). - The
FIG. 4A embodiment includesbutton holes 44 that provide a path for thestraps bag 40 without disturbing the bag's integrity or its ability to effectively contain thefilling 10. This configuration permits therear strap 16 and thefront strap 18 to be connected to the lower sole with a strong and stable connection.FIG. 4B is a section view of thebag 40 taken along lines B-B inFIG. 4A , which passes directly through abutton hole 44.FIG. 4C is a section view of thebag 40 taken along lines C-C inFIG. 4A , which does not pass through a button hole. Taken together,FIGS. 4A-4C show how thebag wall 42 remains intact despite the presence of thebutton holes 44, so as to enclose thefilling 10 within the bag. - The
filling 10 is preferably made of expanded thermoplastic beads (ETBs) that are roughly spherical in shape. The beads are not amalgamated together (i.e., they are not united or combined into a unified or integrated whole, as they might be in a block of Styrofoam). Instead, the individual beads are preferably free to move about with respect to one another, within the confines of thebag 40. In one preferred embodiment, the mean diameter of the ETBs is on the order of 0.8 mm. The size distribution of the beads may be tightly centered about the mean diameter, so that most of the beads would measure between about 0.7 and 0.9 mm. Alternatively, the size distribution may vary more widely (e.g., with the size of the beads ranging from 0.6-1.2 mm). In other embodiments, the average size of the beads is between about ⅔ mm and 1 mm, or even between about a ½ and 1.5 mm. The shape of the beads may also be varied by, for example, using beads that are roughly oblate instead of spherical. - Preferably, a sufficient quantity of beads is included to form a bed that is, on average, at least about one quarter inch thick. In some embodiments, for example, the filling will have a volume of between about 2-5 cubic inches for adult size sandals, and will contain more than 10,000 beads. The preferred packing density for the beads within the
bag 40 is preferably low enough so that when a user walks on the sandal, the beads can shift around to some extent (due to the pressure from the user's foot that is transmitted through theflexible walls 42 of the bag 40), but high enough so that the user's foot is supported by a layer of beads that is at least a few beads thick. - While the most preferred material for the filling 10 is expanded polystyrene beads, other types of expanded thermoplastic beads (e.g., expanded polypropylene beads) may also be used. In less preferred embodiments, other materials that share at least some characteristics (e.g., size, shape, and resiliency) with the preferred beads may be used instead of ETBs.
-
FIG. 5 is another top view of the sandal ofFIG. 1 , with markings to indicate the various section views. As explained above in connection withFIGS. 1 and 2 , arear strap 16 is connected to the sole 12 at the rear end of the rear strap; and afront strap 18 connects the forward end of therear strap 16 to the sole 12.FIGS. 6A-6D are section views, each taken along section line 6-6 inFIG. 5 , of four different embodiments of the sole 12. - In the
FIG. 6A embodiment, the sole 12 includes anoutsole 14, a lower sole 36 that is affixed to the outsole, an upper sole 62, and abag 40 filled with ETBs. Thebag 40 is held in place between the lower sole 36 and the upper sole 32 (thereby indirectly retaining the ETBs between the lower sole and the upper sole). Theoutsole 14 may be affixed to the lower sole 36 using, for example, heat-fusing, cementing, or alternative affixing approaches that will be apparent to persons skilled in the relevant arts. In this embodiment, the lower sole 36 and theoutsole 14, taken together, correspond to the lowersole assembly 30 discussed above in connection withFIG. 3 . Returning now toFIG. 6A , theoutsole 14 is preferably made of a flexible and relatively tough material such as leather, rubber, or EVA, or any other material that is conventionally used for outsoles. The lower sole 36 is preferably made of a flexible material such as leather, rubber, or foamed plastic, or any other material that is conventionally used for midsoles. Thesidewalls 32 and theupper surface 34 of the lower sole 36 define a recess. Thebag 40 rests in that recess and is shaped to match the recess. As discussed above, thebag 40 is preferably filled with ETBs. - The upper sole 62 is disposed on top of the
bag 40 and secured to the lower sole assembly. The upper sole 62 is preferably a thin, flexible material (e.g., stretch cotton jersey fabric with a weight on the order of about 3.5 to 7 ounces per square yard). Other fabrics or materials may be substituted therefore, including but not limited to knit fabrics, woven fabrics, and flexible leather. Such materials are preferably selected so that the upper sole can transmit force from the user's foot to the ETBs in thebag 40, such that the ETBs can shift around to some extent in response to the changes in pressure that occur during ordinary walking. The upper sole 62 is preferably secured to either the lower sole 36 or the outsole 14 (using, for example, adhesives, stitching, or any other approach that provides a relatively strong and permanent connection). Suitable attachment surfaces include the outer surface of thesidewall 32 and/or the lower surface of the lower sole 36 and/or the upper surface of theoutsole 14. - The upper sole 62 is disposed above the
bag 40 so as to keep the bag confined in the footbed between the upper sole 62 and the lower sole 36. Note that althoughFIG. 6A depicts a space between the upper sole 62 and theupper wall 42 of thebag 40, the flexibility of the upper sole 62 will actually cause the upper sole to rest directly on top of theupper wall 42 of thebag 40. They are depicted separately, however, for explanatory purposes. - Returning now to
FIG. 5 , the sandal also includes arear strap 16 and afront strap 18. In embodiments where thebag 40 has button holes 44 (as shown inFIG. 4A ), thestraps bag 40, so the straps can pass through both sets of button holes on their way down to the lower sole assembly. Connecting thestraps - In an alternative embodiment neither the
bag 40 nor the upper sole 62 has button holes, and thestraps straps -
FIG. 6B depicts a second embodiment of the sole, taken along lines 6-6 inFIG. 5 . In theFIG. 6B embodiment, the sole 12 includes anoutsole 14, a lower sole 36 that is affixed to the outsole, and an upper sole 62. The volume between the lower sole 36 and the upper sole 32 is filled withETBs 10, resulting in an ETB-filled footbed. TheFIG. 6B embodiment is therefore similar to theFIG. 6A embodiment, except that the ETBs are not confined in a separate inner bag. As a result, the description of theFIG. 6A embodiment applies in large part to theFIG. 6B embodiment. However, the absence of the inner bag with buttonholes makes it more difficult to attach the straps directly to the lower sole assembly, so variations in which the straps are connected to the upper sole 62 are preferred for this embodiment. -
FIG. 6C depicts a third embodiment of the sole, taken along lines 6-6 inFIG. 5 . TheFIG. 6C embodiment is similar to theFIG. 6B embodiment, except that the lower sole 36 serves as the outsole (in addition to performing its other functions). In this embodiment, the lower sole 36, taken alone, corresponds to the lowersole assembly 30 discussed above in connection withFIG. 3 . Because only a single material is used, different trade offs between comfort and toughness may be required, as will be apparent to persons skilled in the relevant arts. In addition, appropriate changes to the way the upper sole 62 is connected to the lowersole assembly 30 may be required, as will be apparent to persons skilled in the relevant arts. -
FIG. 6D depicts a fourth embodiment of the sole, taken along lines 6-6 inFIG. 5 . TheFIG. 6D embodiment is similar to theFIG. 6C embodiment, except that the lower sole comprises two separate pieces of material: thesidewalls 32 and theoutsole 14. In this embodiment, thesidewalls 32 and theoutsole 14, taken together, correspond to the lowersole assembly 30 discussed above in connection withFIG. 3 . Note that although it is not depicted inFIGS. 6C and 6D , an inner bag may be added to those embodiments to retain the ETBs, similar to the bag 40 (shown inFIGS. 4A-4C ) described above in connection with theFIG. 6A embodiment. - Optionally, the straps may be stuffed with the same material that is used to fill the footbed (see
reference numeral 10 inFIGS. 6A-6D ), such as the preferred expanded polystyrene beads.FIG. 7 depicts a cross section of this type of strap, taken along section line 7-7 ofFIG. 5 . In the illustrated embodiment, a double-walled construction is used, and bothwalls FIG. 7 depicts a space between theinner wall 72 and theouter wall 74, in practice the walls will touch in many places. They are depicted separately, however, for explanatory purposes. - Similar materials to those described above in connection with the upper sole 62 may be used for the
walls inner wall 72 is hose-shaped, with the ends of the hose closed off to keep the filling 70 contained. Because a double-walled construction is used, theinner hose 72 need not be affixed directly to the sole. Instead the inner hose is contained within anouter hose 74, and the outer hose is affixed (e.g., sewn, glued, etc.) to the sole 12. Optionally, intermediate members may be used to connect the outer hose to the sole (e.g., a member with a plug at one end for connecting to the sole and an eyelet at the other end to accept the end of the outer hose). In alternative embodiments, a single-walled construction is used, in which case the single wall must be connected to the sole (either directly or through an intermediate member). - Prototypes of the sandals described above have proven to be extremely comfortable.
- While the present invention has been explained in the context of the preferred embodiments described above, various changes may be made to those embodiments and various equivalents may be substituted without departing from the scope of the invention, as will be apparent to persons skilled in the relevant art. Examples of such changes include, but are not limited to, using the ETB filling (or substitutes therefor) in other styles of sandals (e.g., T-strap sandals, athletic sandals, etc.) or in other types of footwear (e.g., insoles and footwear with uppers such as shoes, sneakers, boots, etc.).
Claims (30)
1. A sandal comprising:
a sole comprising (a) a lower sole, (b) a flexible upper sole, and (c) a plurality of unamalgamated beads disposed between the upper sole and the lower sole; and
at least one strap connected to the sole and configured to secure the sole to the bottom of a user's foot.
2. The sandal of claim 1 , wherein the beads that are disposed between the upper sole and the lower sole are enclosed in a thin and flexible inner bag, the bag being disposed between the upper sole and the lower sole.
3. The sandal of claim 1 , wherein the upper sole is made of fabric.
4. The sandal of claim 1 , wherein the upper sole is made of stretch jersey fabric.
5. The sandal of claim 1 , wherein the beads are roughly spherical expanded thermoplastic beads.
6. The sandal of claim 1 , wherein the beads are roughly spherical expanded polystyrene beads having an average diameter between about two thirds and about one mm, and wherein the plurality of beads comprises at least ten thousand beads.
7. The sandal of claim 6 , wherein the upper sole is made of a lightweight fabric.
8. The sandal of claim 7 , wherein the beads that are disposed between the upper sole and the lower sole are enclosed in an inner bag made of a lightweight fabric, the bag being disposed between the upper sole and the lower sole.
9. The sandal of claim 1 , wherein the at least one strap is stuffed with unamalgamated, roughly spherical, expanded thermoplastic beads.
10. The sandal of claim 1 , wherein the at least one strap is stuffed with unamalgamated, roughly spherical, expanded polystyrene beads having an average diameter between about two thirds and about one mm.
11. A shoe comprising:
a sole comprising (a) a lower sole, (b) a flexible upper sole, and (c) a plurality of unamalgamated small beads disposed between the upper sole and the lower sole; and
an upper connected to the sole and configured to secure the sole to the bottom of a user's foot.
12. The shoe of claim 11 , wherein the beads that are disposed between the upper sole and the lower sole are enclosed in a thin and flexible inner bag, the bag being disposed between the upper sole and the lower sole.
13. The shoe of claim 11 , wherein the upper sole is made of fabric.
14. The shoe of claim 11 , wherein the upper sole is made of cotton jersey stretch knit fabric.
15. The shoe of claim 11 , wherein the beads are roughly spherical expanded thermoplastic beads.
16. The shoe of claim 11 , wherein the beads are roughly spherical expanded polystyrene beads having an average diameter between about two thirds and about one mm, and wherein the plurality of beads comprises at least ten thousand beads.
17. The shoe of claim 16 , wherein the upper sole is made of a lightweight fabric.
18. The shoe of claim 17 , wherein the beads that are disposed between the upper sole and the lower sole are enclosed in an inner bag made of a lightweight fabric, the bag being disposed between the upper sole and the lower sole.
19. An article of footwear comprising:
a lower sole having an upper surface;
sidewalls having an inner surface, wherein the sidewalls are connected to the lower sole so as to form a recess that is bounded by the inner surface of the sidewalls and the upper surface of the lower sole;
a plurality of unamalgamated small beads disposed in the recess;
a thin and flexible upper sole disposed on top of the beads and arranged to retain the beads within the recess; and
wherein the beads are free to shift around within the recess when pressure is applied to the beads through the upper sole.
20. The article of footwear of claim 19 , wherein:
(a) the recess occupies an area that is at least half as large as the area of the upper sole,
(b) at least one part of the recess is at least one about one quarter inch deep, and
(c) the plurality of beads comprises at least ten thousand beads.
21. The article of footwear of claim 20 , wherein the beads are roughly spherical expanded polystyrene beads having an average diameter between about two thirds and about one mm.
22. The article of footwear of claim 21 , wherein the beads are enclosed in a bag made of a lightweight fabric, and the flexible upper sole retains the beads within the recess by retaining the bag within the recess.
23. The article of footwear of claim 21 , further comprising at least one strap connected to at least one of the lower sole, the sidewalls, and the upper sole, wherein the at least one strap is adapted to hold the upper sole against the bottom of a user's foot.
24. The article of footwear of claim 21 , further comprising an upper connected to at least one of the lower sole, the sidewalls, and the upper sole, wherein the upper is adapted to hold the upper sole against the bottom of a user's foot.
25. The article of footwear of claim 19 , wherein the beads are roughly spherical expanded thermoplastic beads.
26. The article of footwear of claim 19 , wherein the beads are roughly spherical expanded polystyrene beads having an average diameter between about two thirds and about one mm, and wherein the volume of beads includes at least ten thousand beads.
27. An article of footwear comprising:
a volume of unamalgamated small beads;
a lower sole disposed beneath the volume of beads; and
a flexible covering disposed above the volume of beads,
wherein the beads are retained between the lower sole and the flexible covering, and wherein, when the article of footwear is worn by a person that is standing or walking, the volume of beads bears at least some of the weight of the person.
28. The article of footwear of claim 27 , wherein the beads are enclosed in a thin and flexible inner bag, the bag being disposed between the lower sole and the flexible covering.
29. The article of footwear of claim 27 , wherein the beads are roughly spherical expanded thermoplastic beads.
30. The article of footwear of claim 27 , wherein the beads are roughly spherical expanded polystyrene beads having an average diameter between about two thirds and about one mm, and wherein the volume of beads includes at least ten thousand beads.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/757,874 US20050150132A1 (en) | 2004-01-14 | 2004-01-14 | Footwear with expanded thermoplastic beads in the footbed |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/757,874 US20050150132A1 (en) | 2004-01-14 | 2004-01-14 | Footwear with expanded thermoplastic beads in the footbed |
Publications (1)
Publication Number | Publication Date |
---|---|
US20050150132A1 true US20050150132A1 (en) | 2005-07-14 |
Family
ID=34740102
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/757,874 Abandoned US20050150132A1 (en) | 2004-01-14 | 2004-01-14 | Footwear with expanded thermoplastic beads in the footbed |
Country Status (1)
Country | Link |
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US (1) | US20050150132A1 (en) |
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US11419384B2 (en) | 2019-02-07 | 2022-08-23 | Benjamin Ari Bryer | Shoe for simulating exercising on natural granular matertial |
US11607009B2 (en) | 2019-07-25 | 2023-03-21 | Nike, Inc. | Article of footwear |
US11622600B2 (en) | 2019-07-25 | 2023-04-11 | Nike, Inc. | Article of footwear |
US11744321B2 (en) * | 2019-07-25 | 2023-09-05 | Nike, Inc. | Cushioning member for article of footwear and method of making |
CN114727682A (en) * | 2019-07-25 | 2022-07-08 | 耐克创新有限合伙公司 | Cushioning member for an article of footwear |
US20210022440A1 (en) * | 2019-07-25 | 2021-01-28 | Nike, Inc. | Cushioning member for article of footwear and method of making |
USD919946S1 (en) * | 2019-10-29 | 2021-05-25 | Mdreams Ip Holding Limited | Shoe footbed |
USD964001S1 (en) * | 2020-12-02 | 2022-09-20 | Columbia Insurance Company | Upper for a shoe |
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