Footwear Having Adjustable-Height Heel and Method Therefor
An article of footwear has a height adjustable heel. A heel assembly is coupled to a toe assembly. A sole assembly is disposed over the heel assembly. A hinge assembly joins the sole assembly and heel assembly at a junction with the toe assembly. The hinge assembly has a locking mechanism, which allows the sole assembly to pivot with respect to the heel assembly to adjust a height of the sole assembly over the heel assembly when the locking mechanism is disengaged. The height of the sole assembly over the heel assembly is fixed when the locking mechanism is engaged. The heel assembly has a first inner support and the sole assembly has a second inner support. A pin coupled to a sprocket engages and disengages the first inner support and the second inner support to adjust a height of the sole assembly with respect to the heel assembly.
The present non-provisional application claims the benefit of priority of U.S. Provisional Application Ser. No. 61/138,449, filed Dec. 17, 2008.
FIELD OF THE INVENTIONThe present invention relates in general to footwear and, more specifically, to footwear having an adjustable-height heel.
BACKGROUND OF THE INVENTIONFootwear is an integral part of the utility and fashion of clothing accessories worn by people. Footwear comes in a myriad of styles, shapes, colors, functions, and other attributes. In women's footwear in particular, each of the above attributes is important in the mind of the consumer. Depending on the occasion, women may choose to wear heeled shoes. The height of the heel can range from say 2 to 4 (or more) inches. High heels are considered functional and fashionable. The high heel of the shoe improves posture and increases the woman's overall height, as well as accenting the pants or dress she is wearing. For example, many pants are cut to be worn with high-heeled shoes.
Most shoes have a fixed-height heel. That is, the height of the heel cannot be adjusted. Yet, the fixed-height heel can present comfort and convenience problems during a typically wearing cycle or period. For example, the woman may want to wear high heels at work, but have a long walk to and from the workplace. Since the heels are fixed, she must decide either to wear more comfortable shoes during the walking phase and change out to high heels once in the office, or simply endure the discomfort of walking a long distance in high heels. The contact portion of the heel to the ground is typically small so high heels tend to wear-out quickly when walking long distances.
In another scenario, the woman may have varying activities during the same day. A first activity, such as shopping, involves significant standing, walking, and carrying of heavy bags. She may choose to wear low-heel shoe during the first activity. A second activity during the same day may be a social event in which she wants to hear high heels. Again, the woman must plan for a different pair of shoes for each activity, or deal with the discomfort and inconvenience of wearing the same shoes for both activities.
Some shoes have an adjustable heel, for example as taught in U.S. Pat. Nos. 3,464,126 and 4,416,072. The shoe has an external adjustment mechanism to increase the height of the heel. The external adjustment mechanism is readily apparent to the casual observer and detracts from the aesthetic nature of the shoe.
SUMMARY OF THE INVENTIONA need exists for an adjustable heel footwear having an easy to operate, hidden adjustment mechanism. Accordingly, in one embodiment, the present invention is an article of footwear comprising a heel assembly coupled to a toe assembly. A sole assembly is disposed over the heel assembly. A hinge assembly joins the sole assembly and heel assembly at a junction with the toe assembly. The hinge assembly includes a locking mechanism, which allows the sole assembly to pivot with respect to the heel assembly to adjust a height of the sole assembly over the heel assembly when the locking mechanism is disengaged. The height of the sole assembly over the heel assembly is fixed when the locking mechanism is engaged.
In another embodiment, the present invention is an article of footwear comprising a heel assembly coupled to a toe assembly. A sole assembly is disposed over the heel assembly. A lockable hinge assembly joins the sole assembly and heel assembly. The lockable hinge assembly provides pivotal movement and height adjustment of the sole assembly with respect to the heel assembly when the lockable hinge assembly is disengaged and fixes the height of the sole assembly over the heel assembly when the lockable hinge assembly is engaged.
In another embodiment, the present invention is a method of manufacturing an article of footwear comprising the steps of providing a heel assembly coupled to a toe assembly, disposing a sole assembly over the heel assembly, and joining the sole assembly and heel assembly with a lockable hinge assembly. The lockable hinge assembly provides pivotal movement and height adjustment of the sole assembly with respect to the heel assembly when the lockable hinge assembly is disengaged and fixes the height of the sole assembly over the heel assembly when the lockable hinge assembly is engaged.
The present invention is described in one or more embodiments in the following description with reference to the figures, in which like numerals represent the same or similar elements. While the invention is described in terms of the best mode for achieving the invention's objectives, it will be appreciated by those skilled in the art that it is intended to cover alternatives, modifications, and equivalents as may be included within the spirit and scope of the invention as defined by the appended claims and their equivalents as supported by the following disclosure and drawings.
In one embodiment, adjustable-height heel assembly 14 is integral to toe assembly 16, i.e., continuous body or rigidly fixed together. Alternatively, adjustable-height heel assembly 14 is moveable with respect to toe assembly 16. Sole assembly 12 includes at least heel portion 18, back end 20, upper sole 24, and lower sole 26. Toe assembly 16 has toe portion 28 and front end 30. Vamp 32 extends laterally and arcuately over toe portion 28. Vamp 32 is secured at opposite side locations 34 of toe assembly 16. Heel strap 36 extends laterally and arcuately over upper sole 24 across heel portion 18 of sole assembly 12. Heel strap 36 is secured at opposite side locations 38 of sole assembly 12. The foot of the wearer is received on upper sole 24. The instep of the foot is received within vamp 32, and the heel of the foot is held within heel strap 36. The weight of the ball and toes of the foot are borne by toe portion 28, and the weight of the heel of the foot is borne by heel portion 18.
A hinge assembly 40 is incorporated in shoe 10 at the junction between sole assembly 12, adjustable-height heel assembly 14, and toe assembly 16. Hinge assembly 40 extends laterally across the junction between the opposite side locations 34 and provides pivotal movement between sole assembly 12 and adjustable-height heel assembly 14. Hinge assembly 40 changes the orientation between heel portion 18 and toe portion 28. In some embodiments, hinge assembly 40 also provides pivotal movement of adjustable-height heel assembly 14 with respect to toe assembly 16.
The inner supports 42 and 50 are embedded in sole assembly 12 and adjustable-height heel assembly 14, respectively, to provide a rigid supporting platform while concealing the inner supports from casual view and maintaining the aesthetic appeal of shoe 10. The inner supports 42, 50, and 62 are made with strong, rigid, resilient material, such as plastic, steel, aluminum, wood, cork, or the like. Alternatively, inner supports 42, 50, and 62 can be fastened exteriorly to sole assembly 12, adjustable-height heel assembly 14, and toe assembly 16, respectively, with adhesive or mechanical fasteners, such as glue, screws, nails, rivets, or the like.
In
The wearer adjusts the relative position between sole assembly 12 and heel assembly 14 as desired. For example, shoe 10 can be set to a low-heeled shoe as shown in
Push button 76 is released to re-engage locking mechanism 72. Compression spring 86 forces pin 84 to the right in cavity 88 and forces push button 76 to its normal position outside of cavity 104 to engage locking mechanism 72. Sprocket 90 returns to its engaged position with teeth 92 meshing with teeth 96 and 98 of hinge ends 46 and 58. Locking mechanism 72 is engaged. The inner support 42 is held rigid with respect to inner support 50, preventing movement of sole assembly 12 with respect to heel assembly 14.
Compression spring 86 operates as a bias against pin 84 and sprocket 90 to hold teeth 92 meshed into teeth 96 and 98. Compression spring 86 maintains locking mechanism 72 in its engaged position to prevent slippage of sole assembly 12 with respect to heel assembly 14. Additional springs can be positioned to exert a pulling or pushing force to apply the described bias to locking mechanism 72 and maintain teeth 92 of sprocket 90 concurrently engaged with teeth 96 and 98 of hinge ends 46 and 58.
In an alternate embodiment,
A lockable hinge assembly 140 is incorporated in shoe 110 at the junction between sole assembly 112, adjustable-height heel assembly 114, and toe assembly 116. The lockable hinge assembly 140 extends laterally across the junction between the opposite side locations 134 and provides pivotal movement between sole assembly 112 and heel assembly 114. Hinge assembly 140 changes the orientation between heel portion 118 and toe portion 128.
A scissor assembly 142 extends between sole assembly 112 and heel assembly 114. Scissor assembly 142 includes weight bearing support members or arms 144 rotatably secured to sole assembly 112 and body 145 of heel assembly 114. For example, support members 144 can be secured to sole assembly 112 and heel assembly 114 with moveable rivets. Support members 144 are joined by locking mechanism 146.
In one embodiment, adjustable-height heel assembly 214 is integral to toe assembly 216, i.e., continuous body or rigidly fixed together. Alternatively, adjustable-height heel assembly 214 is moveable with respect to toe assembly 216. Sole assembly 212 includes at least heel portion 218, back end 220, upper portion 222, and lower portion 224. Heel assembly 214 includes support member 226. Toe assembly 216 has toe portion 228 and front end 230. Vamp 232 extends laterally and arcuately over toe portion 228. Vamp 232 is secured at opposite side locations 234 of toe assembly 216. Heel strap 236 extends laterally and arcuately over upper sole 222 across heel portion 218 of sole assembly 212. Heel strap 236 is secured at opposite side locations 238 of sole assembly 212. The foot of the wearer is received on upper sole 222. The instep of the foot is received within vamp 232, and the heel of the foot is held within heel strap 236. The weight of the ball and toes of the foot are borne by toe portion 228, and the weight of the heel of the foot is borne by heel portion 218.
A hinge assembly 240 is incorporated in shoe 210 at the junction between sole assembly 212, adjustable-height heel assembly 214, and toe assembly 216. Hinge assembly 240 extends laterally across the junction between the opposite side locations 234 and provides pivotal movement between sole assembly 212 and adjustable-height heel assembly 214. Hinge assembly 240 changes the orientation between heel portion 218 and toe portion 228. In some embodiments, hinge assembly 240 also provides pivotal movement of adjustable-height heel assembly 214 with respect to toe assembly 216.
The inner supports 242 and 262 are embedded in sole assembly 212 and toe assembly 216, respectively, to provide a rigid supporting platform while concealing the inner supports from casual view and maintaining the aesthetic appeal of shoe 210. The inner supports 242 and 262 are made with strong, rigid, resilient material, such as plastic, steel, aluminum, wood, cork, or the like. Alternatively, inner supports 242 and 262 can be fastened exteriorly to sole assembly 212 and toe assembly 216, respectively, with adhesive or mechanical fasteners, such as glue, screws, nails, rivets, or the like.
Returning to
The locking mechanism 272 locks hinge assembly 240 to create a fixed separation between adjustable-height heel assembly 214 and sole assembly 212. When locking mechanism 272 is disengaged (by pulling tab 276), hinge assembly 240 is free to pivot and permit movement of sole assembly 212 with respect to heel assembly 214 to set the height of heel section 218 with respect to toe section 228. When locking mechanism 272 is engaged, hinge assembly 240 is fixed in position to make shoe 210 rigid and suitable to support the weight of the wearer under normal conditions. Accordingly, locking mechanism 272 can be set to give sole assembly 212 any degree of lift with respect to heel assembly 214, say between 1-4 inches. The height of sole assembly 212 over heel assembly 214 thus is selectable by the wearer.
Pin or rod 304 is routed through male spline 300 and secured with anchor spline 306, stop nut and o-ring 308, and low profile heads 310. Pull tabs 276 and pins 304 can be aluminum, steel, polymer, graphite, composite material, or other strong, resilient material. Pull tabs 276 can be the same color and texture as vamp 232 to blend in with the vamp, or covered with a decorative or protective covering or sheath for aesthetic appeal and functional operation.
The wearer adjusts the relative position between sole assembly 212 and heel assembly 214 as desired. For example, shoe 210 can be set to a low-heeled shoe as shown in
While one or more embodiments of the present invention have been illustrated in detail, the skilled artisan will appreciate that modifications and adaptations to those embodiments may be made without departing from the scope of the present invention as set forth in the following claims.
Claims
1. An article of footwear, comprising:
- a toe assembly;
- a heel assembly coupled to the toe assembly;
- a sole assembly disposed over the heel assembly; and
- a hinge assembly joining the sole assembly and heel assembly at a junction with the toe assembly, the hinge assembly including a locking mechanism allowing the sole assembly to pivot with respect to the heel assembly to adjust a height of the sole assembly over the heel assembly when the locking mechanism is disengaged, the height of the sole assembly over the heel assembly being fixed when the locking mechanism is engaged.
2. The article of footwear of claim 1, wherein the toe assembly includes:
- an inner support;
- an upper toe layer disposed over the inner support; and
- a lower toe layer disposed under the inner support.
3. The article of footwear of claim 1, wherein the heel assembly includes:
- a body; and
- a first inner support disposed within the body.
4. The article of footwear of claim 3, wherein the sole assembly includes:
- a second inner support having a hinge end pivotally coupled to a hinge end of the first inner support by the locking mechanism;
- an upper sole disposed over the second inner support; and
- a lower sole disposed under the second inner support.
5. The article of footwear of claim 4, wherein the locking mechanism includes:
- a pin disposed in a first cavity of the hinge assembly, the pin passing through an opening in the hinge end of the first inner support and passing through an opening in the hinge end of the second inner support;
- a push button coupled to a first end of the pin and exposed from an exterior surface of the footwear; and
- a sprocket coupled to a second end of the pin, the sprocket having a plurality of teeth meshing with teeth formed in the opening of the hinge end of the first inner support and further meshing with teeth formed in the opening of the hinge end of the second inner support when the locking mechanism is engaged, the teeth of the sprocket being extracted from the teeth of the hinge end of the first inner support when the locking mechanism is disengaged.
6. The article of footwear of claim 5, wherein the push button is pressed into a second cavity of the hinge assembly to move the pin and sprocket and extract the teeth of the sprocket from the teeth of the hinge end of the first inner support permitting the sole assembly to pivot with respect to the heel assembly.
7. The article of footwear of claim 5, further including a spring coiled around the pin to bias the teeth of the sprocket against the teeth of the hinge end of the first inner support and teeth of the hinge end of the second inner support.
8. The article of footwear of claim 1, wherein the locking mechanism includes:
- a first female spline disposed within the heel assembly;
- a second female spline disposed within the sole assembly; and
- a male spline inserted into the first and second female splines when the locking mechanism is engaged and extracted from the first female spline when the locking mechanism is disengaged.
9. An article of footwear, comprising:
- a toe assembly;
- a heel assembly coupled to the toe assembly;
- a sole assembly disposed over the heel assembly; and
- a lockable hinge assembly joining the sole assembly and heel assembly, the lockable hinge assembly providing pivotal movement and height adjustment of the sole assembly with respect to the heel assembly when the lockable hinge assembly is disengaged and fixing the height of the sole assembly over the heel assembly when the lockable hinge assembly is engaged.
10. The article of footwear of claim 8, wherein the heel assembly includes:
- a body; and
- a first inner support disposed within the body of the heel assembly.
11. The article of footwear of claim 10, wherein the sole assembly includes a second inner support having a hinge end pivotally coupled to a hinge end of the first inner support by the lockable hinge assembly.
12. The article of footwear of claim 11, wherein the lockable hinge assembly includes:
- a pin disposed in a first cavity of the lockable hinge assembly, the pin passing through an opening in the hinge end of the first inner support and through an opening in the hinge end of the second inner support;
- a push button coupled to a first end of the pin and exposed from an exterior surface of the footwear; and
- a sprocket coupled to a second end of the pin, the sprocket having a plurality of teeth meshing with teeth formed in the opening of the hinge end of the first inner support and further meshing with teeth formed in the opening of the hinge end of the second inner support when the lockable hinge mechanism is engaged, the teeth of the sprocket being extracted from the teeth of the hinge end of the first inner support when the lockable hinge mechanism is disengaged.
13. The article of footwear of claim 12, wherein the push button is pressed into a second cavity of the lockable hinge assembly to move the pin and sprocket and extract the teeth of the sprocket from the teeth of the hinge end of the first inner support permitting the sole assembly to pivot with respect to the heel assembly.
14. The article of footwear of claim 12, further including a spring coiled around the pin to bias the teeth of the sprocket against the teeth of the hinge end of the first inner support and teeth of the hinge end of the second inner support.
15. The article of footwear of claim 9, wherein the locking mechanism includes:
- a first female spline disposed within the heel assembly;
- a second female spline disposed within the sole assembly; and
- a male spline inserted into the first and second female splines when the locking mechanism is engaged and extracted from the first female spline when the locking mechanism is disengaged.
16. A method of manufacturing an article of footwear, comprising:
- providing a heel assembly coupled to a toe assembly;
- disposing a sole assembly over the heel assembly; and
- joining the sole assembly and heel assembly with a lockable hinge assembly, the lockable hinge assembly providing pivotal movement and height adjustment of the sole assembly with respect to the heel assembly when the lockable hinge assembly is disengaged and fixing the height of the sole assembly over the heel assembly when the lockable hinge assembly is engaged.
17. The method of claim 16, wherein providing the sole assembly includes:
- providing a body; and
- disposing a first inner support within the body.
18. The method of claim 17, wherein the heel assembly includes a second inner support having a hinge end pivotally coupled to a hinge end of the first inner support by the lockable hinge assembly.
19. The method of claim 18, further including:
- passing a pin through an opening in the hinge end of the first inner support and through an opening in the hinge end of the second inner support;
- coupling a push button to a first end of the pin and exposed from an exterior surface of the footwear; and
- coupling a sprocket to a second end of the pin, the sprocket having a plurality of teeth meshing with teeth formed in the opening of the hinge end of the first inner support and further meshing with teeth formed in the opening of the hinge end of the second inner support when the lockable hinge mechanism is engaged, the teeth of the sprocket being extracted from the teeth of the hinge end of the second inner support when the lockable hinge mechanism is disengaged.
20. The method of claim 16, further including:
- disposing a first female spline within the heel assembly;
- disposing a second female spline within the sole assembly;
- inserting a male spline into the first and second female splines when the locking mechanism is engaged; and
- extracting the male spline from the first female spline when the locking mechanism is disengaged.
Type: Application
Filed: Dec 16, 2009
Publication Date: Jun 17, 2010
Applicant: Crisp Enterprises, Inc. (Scottsdale, AZ)
Inventor: Juliana M. Crispo (Scottsdale, AZ)
Application Number: 12/639,641
International Classification: A43B 3/24 (20060101); A43B 13/00 (20060101); A43D 8/00 (20060101); A43D 33/00 (20060101);