SHOE WITH INTERCHANGEABLE HEELS
A shoe includes an interchangeable heel having a shoe body configured to accept a foot of a person. A protrusion is permanently attached to a bottom heel surface comprising two oppositely disposed straight edges separating and contiguous with two oppositely disposed curved edges. A channel is disposed within the protrusion between the two oppositely disposed curved edges. A removable heel comprises an open-ended slot configured to securely accept the protrusion. The removable heel is rotatably attachable to the protrusion. The at least one stop is attached to the removable heel and configured to prevent translation of the removable heel relative to the protrusion. A flexural lock attached to the removable heel is configured to engage the channel and prevent rotation of the removable heel relative to the protrusion. The flexural lock may be manually disengaged by the person to release the removable heel from the protrusion.
This non-provisional patent application claims priority to provisional application 61/537,402 filed on Sep. 21, 2011, the contents of which are fully incorporated herein with this reference.
FIELD OF THE INVENTIONThe present invention generally relates to shoes. More particularly, the present invention relates to shoes with interchangeable heels such that varying heel heights may be used throughout the day with the same shoe body.
BACKGROUND OF THE INVENTIONThe heel of a shoe may wear out prematurely when worn by a person. This is especially true of high heels on women's shoes. This is because the bottommost portion of the high heel that touches the ground is small in comparison to the upper part of the heel that supports the woman's heel. Therefore, a lot of weight and stress is channeled into the small bottom of the heel and causes premature wear.
Furthermore, walking in a high heel for an extended period of time is extremely challenging. As most women have experienced, the higher the height of the heel the shorter the period of time they can wear the shoe before they become fatigued and the shoe starts becoming uncomfortable or even painful. This is because the heel is dramatically elevated compared to the ball of the foot, which increases the difficulty of walking and wearing the shoe for long periods.
Accordingly, there is a need for a shoe with an interchangeable heel. This would allow a woman to wear one pair of shoes to work with a relatively low heel, say one inch. The woman could walk on the shorter heel the whole day and not experience fatigue or pain. Then, when the woman wanted to go to dinner or an event later in the evening, she could simply interchange the shorter heel for a taller one. For example, she could swap out the one inch heel for a three inch heel. At the end of the night, the woman could again exchange out the taller heel for the shorter one if she had a long walk back to her car or to a taxi. The pair of interchangeable heels that are not being used are small enough that they could fit into her bag or purse.
Other inventors have attempted to design and patent embodiments of this general concept. However, designing a reliable and easy to use mechanism to interchange high heels is not an easy task as considerations such as safety, reliability and quality are key issues that determine whether women will in fact rely upon and use the product. For instance, a secure fit must be devised such that when the heel is removably attached to the bottom of the shoe, that the heel is sufficiently connected to the shoe such that it does not wobble, flex or move in any unwanted ways. It must be appreciated that women are often balancing upon the very small area of the high heel and any weakness in the design could lead to the woman falling over or breaking the heel. This type of a failure is very unwanted and undesirable in a product.
Furthermore, the ability to easily interchange one heel for another must be simple enough and elegant enough that women won't be discouraged from using it. For instance, a complicated and tough to use mechanism discourages a woman from using the product. The mechanism or design for interchanging one heel for another shouldn't be difficult to use or require a high level of physical strength to tighten a fastener or engage a locking mechanism. The mechanism or design for interchanging one heel for another should be configured to inspire confidence and eliminate the potential for wobbles, weaknesses or inconsistent attachments. The present invention fulfills these needs and provides other related advantages.
SUMMARY OF THE INVENTIONAn exemplary embodiment of the present invention discloses a shoe with an interchangeable heel. The shoe comprises a shoe body configured to accept a foot of a person. The shoe body comprises an outsole defining a bottom heel surface. A protrusion is permanently attached to the bottom heel surface. The protrusion comprises two oppositely disposed straight edges separating and contiguous with two oppositely disposed curved edges. The two oppositely disposed curved edges together define a first circular arc. A channel is disposed within the protrusion between the two oppositely disposed curved edges, wherein the channel faces away from the bottom heel surface. A removable heel comprises an open-ended slot defining a portion of a second circular arc. The portion of the second circular arc is configured to securely accept the first circular arc of the protrusion. The removable heel is rotatably attachable to the protrusion. The at least one stop is attached to the removable heel. The at least one stop is configured to prevent translation of the removable heel relative to the protrusion. A flexural lock is attached to the removable heel and configured to engage the channel. The flexural lock is configured to prevent rotation of the removable heel relative to the protrusion. The flexural lock may be manually disengaged by the person to release the removable heel from the protrusion.
In other exemplary embodiments, the at least one stop may comprise a pin, a dowel pin, or a metallic pin. The removable heel may comprise at least two holes configured to accept the at least one stop. The at least one stop may be installed in either of the at least two holes such that the removable heel can be configured for either a left or a right shoe configuration.
The removable heel may be defined as comprising a centerline, wherein a distance from the centerline to the at least one stop is greater than a half of a width defined between the two oppositely disposed straight edges. Furthermore, the removable heel may be defined as comprising a centerline and wherein the protrusion may be defined as comprising a second centerline between the two oppositely disposed curved edges. The protrusion may be translatable within the open-ended slot when the centerline of the removable heel is perpendicular to the second centerline of the protrusion. Then, the removable heel may be pivotable relative to the protrusion in a single rotational direction from a first position wherein the centerline of the removable heel is perpendicular with the second centerline of the protrusion to a second position wherein the centerline of the removable heel is aligned with the second centerline of the protrusion.
The flexural lock may comprise a manually accessible tab extension, wherein the person can depress the tab extension disengaging the flexural lock from the channel.
In another exemplary embodiment of the present invention, a shoe comprises a shoe body configured to accept a foot of a person. The shoe body comprises an outsole defining a bottom heel surface. A translatable and rotatable slide is permanently attached to the bottom heel surface. The slide comprises two oppositely disposed straight edges separating and contiguous with two oppositely disposed curved edges. The two oppositely disposed curved edges together define a first circular arc. A channel is disposed within the slide between the two oppositely disposed curved edges. The channel faces away from the bottom heel surface. A removable heel comprises a slide-receiving cavity defining a portion of a second circular arc. The portion of the second circular arc is configured to securely accept the first circular arc of the slide, wherein the removable heel is rotatably attachable to the protrusion. At least one stop is attached to the removable heel. The at least one stop is configured to prevent translation of the removable heel relative to the slide. A biased lock is attached to the removable heel configured to engage the channel. The biased lock is configured to prevent rotation of the removable heel relative to the slide. The biased lock may be manually disengaged by the person to release the removable heel from the slide.
In other exemplary embodiments, the biased lock may comprise a flexure, spring or magnet. The at least one stop may comprise a pin, a dowel pin, or a metallic pin. The removable heel may comprise at least two holes configured to accept the at least one stop. The at least one stop may be installed in either of the at least two holes such that the removable heel can be configured for either a left or a right shoe configuration.
The removable heel may be defined as comprising a centerline wherein a distance from the centerline to the at least one stop is greater than a half of a length defined between the two oppositely disposed straight edges. Furthermore, the removable heel may be defined as comprising a centerline and wherein the protrusion may be defined as comprising a second centerline between the two oppositely disposed curved edges, wherein the protrusion is translatable within the open-ended slot when the centerline of the removable heel is perpendicular to the second centerline of the protrusion. Then, the removable heel may be pivotable relative to the protrusion in a single rotational direction from a first position wherein the centerline of the removable heel is perpendicular with the second centerline of the protrusion to a second position wherein the centerline of the removable heel is aligned with the second centerline of the protrusion.
The biased lock may comprise a manually accessible tab extension, wherein the person can depress the tab extension disengaging the biased lock from the channel.
In another exemplary embodiment of the present invention, a shoe comprises a shoe body configured to accept a foot of a person. The shoe body comprises an outsole defining a bottom heel surface. A protrusion is permanently attached to the bottom heel surface. The protrusion comprises two oppositely disposed edges separating and contiguous with two oppositely disposed curved edges, wherein the two oppositely disposed curved edges together define a first circular arc. A channel is disposed within the protrusion between the two oppositely disposed curved edges. The channel faces away from the bottom heel surface. A removable heel comprises an open-ended slot defining a portion of a second circular arc. The portion of the second circular arc is configured to snugly accept the first circular arc of the protrusion such that the removable heel is rotatably attached to the protrusion. A biased lock is attached to the removable heel configured to automatically engage the channel. The biased lock is configured to prevent rotation of the removable heel relative to the protrusion. The biased lock may be manually disengaged by the person to release the removable heel from the protrusion.
Other exemplary embodiments may include at least one stop attached to the removable heel, the at least one stop configured to prevent translation of the removable heel relative to the protrusion.
The removable heel may be defined as comprising a centerline and wherein the protrusion is defined as comprising a second centerline between the two oppositely disposed curved edges. The protrusion may be translatable within the open-ended slot when the centerline of the removable heel is perpendicular to the second centerline of the protrusion. Then, the removable heel may be rotatable/pivotable relative to the protrusion in a rotational direction from a first position wherein the centerline of the removable heel is perpendicular with the second centerline of the protrusion to a second position wherein the centerline of the removable heel is aligned with the second centerline of the protrusion.
Other features and advantages of the present invention will become apparent from the following more detailed description, when taken in conjunction with the accompanying drawings, which illustrate, by way of example, the principles of the invention.
The accompanying drawings illustrate the invention. In such drawings:
Referring now to
A channel 36 is disposed within the protrusion 24 between the two oppositely disposed curved edges 32. The channel 36 faces away from the bottom heel surface 18. It is to be also understood by one skilled in the art that the channel 36 may take the form of a variety of shapes consistent with the teachings of this disclosure, as this teaching is not limited to the exact form depicted herein.
Referring now to
A stop 44 is attached to the removable heel 12. The stop 44 may be at least one stop, two stops, or a plurality of stops. The stop 44 is configured to prevent translation of the removable/interchangeable heel 12 relative to the protrusion 24.
The removable heel 12 may include a set of holes 46 for the stop 44 to be placed within. The holes 46 may be a single hole, two holes, or a set of holes such as four holes. The stop 44 may comprise a pin, a dowel pin, or a metallic pin. The stop 44 may also be formed as part of the heel 12 and not a separate part installed at a later time.
The stop 44 may be installed in either of two holes such that the removable heel can be configured for either a left or a right shoe configuration.
Still referring to
The removable heel 12 may be defined as comprising a centerline 56. A distance from the centerline 56 to a stop 44 is greater than a half of a width defined between the two oppositely disposed straight edges 30. This is so because the protrusion 24 has to be narrower than the stops 44 or else the protrusion 24 could not be placed within the open-ended slot 38. For clarification refer to
The protrusion 24 may be defined as comprising a second centerline 58 between the two oppositely disposed curved edges 32. The protrusion 24 may be translatable within the open-ended slot 38 when the centerline 56 of the removable heel 12 is perpendicular to the second centerline 58 of the protrusion 24 as shown in
The purpose of creating a heel attachment mechanism which requires the person 22 to first slide the protrusion 24 into the open-ended slot 38 and then rotate the heel 12 relative to the shoe body 14, results in a secure and tight fit between the shoe body 14 and the removable/interchangeable heel 12. The lock 48 engages the channel 36 such that rotation is now fixed. The heel 12 cannot slide out because the stop 44 is in the way. Through this unique and inventive attachment mechanism, the heel 12 is secured in a strong and reliable means that provides comfort to the person 22 that the heel 12 will not become loose, wobbly or fall apart.
Although several embodiments have been described in detail for purposes of illustration, various modifications may be made to each without departing from the scope and spirit of the invention. Accordingly, the invention is not to be limited, except as by the appended claims.
Claims
1. A shoe with an interchangeable heel, comprising:
- a shoe body configured to accept a foot of a person, the shoe body comprising an outsole defining a bottom heel surface;
- a protrusion permanently attached to the bottom heel surface, the protrusion comprising two oppositely disposed straight edges separating and contiguous with two oppositely disposed curved edges, wherein the two oppositely disposed curved edges together define a first circular arc;
- a channel disposed within the protrusion between the two oppositely disposed curved edges, wherein the channel faces away from the bottom heel surface;
- a removable heel comprising an open-ended slot defining a portion of a second circular arc, wherein the portion of the second circular arc is configured to securely accept the first circular arc of the protrusion, wherein the removable heel is rotatably attachable to the protrusion;
- at least one stop attached to the removable heel, the at least one stop configured to prevent translation of the removable heel relative to the protrusion; and
- a flexural lock attached to the removable heel configured to engage the channel, the flexural lock configured to prevent rotation of the removable heel relative to the protrusion, and wherein the flexural lock may be manually disengaged by the person to release the removable heel from the protrusion.
2. The shoe of claim 1, wherein the at least one stop comprises a pin, a dowel pin, or a metallic pin.
3. The shoe of claim 1, wherein the removable heel comprises at least two holes configured to accept the at least one stop.
4. The shoe of claim 3, wherein the at least one stop may be installed in either of the at least two holes such that the removable heel can be configured for either a left or a right shoe configuration.
5. The shoe of claim 1, wherein the removable heel is defined as comprising a centerline, and wherein a distance from the centerline to the at least one stop is greater than a half of a width defined between the two oppositely disposed straight edges.
6. The shoe of claim 1, wherein the removable heel is defined as comprising a centerline and wherein the protrusion is defined as comprising a second centerline between the two oppositely disposed curved edges.
7. The shoe of claim 6, wherein the protrusion is translatable within the open-ended slot when the centerline of the removable heel is perpendicular to the second centerline of the protrusion.
8. The shoe of claim 7, wherein the removable heel is rotatable relative to the protrusion in a single rotational direction from a first position wherein the centerline of the removable heel is perpendicular with the second centerline of the protrusion to a second position wherein the centerline of the removable heel is aligned with the second centerline of the protrusion.
9. The shoe of claim 1, wherein the flexural lock comprises a manually accessible tab extension, wherein the person can depress the tab extension disengaging the flexural lock from the channel.
10. A shoe, comprising:
- a shoe body configured to accept a foot of a person, the shoe body comprising an outsole defining a bottom heel surface;
- a translatable and rotatable slide permanently attached to the bottom heel surface, the slide comprising two oppositely disposed straight edges separating and contiguous with two oppositely disposed curved edges, wherein the two oppositely disposed curved edges together define a first circular arc;
- a channel disposed within the slide between the two oppositely disposed curved edges, wherein the channel faces away from the bottom heel surface;
- a removable heel comprising a slide-receiving cavity defining a portion of a second circular arc, wherein the portion of the second circular arc is configured to securely accept the first circular arc of the slide, wherein the removable heel is rotatably attachable to the slide;
- at least one stop attached to the removable heel, the at least one stop configured to prevent translation of the removable heel relative to the slide; and
- a biased lock attached to the removable heel configured to engage the channel, the biased lock configured to prevent rotation of the removable heel relative to the slide and wherein the biased lock may be manually disengaged by the person to release the removable heel from the slide.
11. The shoe of claim 10, wherein the biased lock comprises a flexure, spring, or magnet.
12. The shoe of claim 10, wherein the at least one stop comprises a pin, a dowel pin, or a metallic pin.
13. The shoe of claim 10, wherein the removable heel comprises at least two holes configured to accept the at least one stop and wherein the at least one stop may be installed in either of the at least two holes such that the removable heel can be configured for either a left or a right shoe configuration.
14. The shoe of claim 10, wherein the removable heel is defined as comprising a centerline, and wherein a distance from the centerline to the at least one stop is greater than a half of a length defined between the two oppositely disposed straight edges.
15. The shoe of claim 10, wherein the removable heel is defined as comprising a centerline and wherein the slide is defined as comprising a second centerline between the two oppositely disposed curved edges, wherein the slide is translatable within the open-ended slot when the centerline of the removable heel is perpendicular to the second centerline of the slide.
16. The shoe of claim 15, wherein the removable heel is rotatable relative to the slide in a single rotational direction from a first position wherein the centerline of the removable heel is perpendicular with the second centerline of the slide to a second position wherein the centerline of the removable heel is aligned with the second centerline of the slide.
17. The shoe of claim 10, wherein the biased lock comprises a manually accessible tab extension, wherein the person can depress the tab extension disengaging the biased lock from the channel.
18. A shoe, comprising:
- a shoe body configured to accept a foot of a person, the shoe body comprising an outsole defining a bottom heel surface;
- a protrusion permanently attached to the bottom heel surface, the protrusion comprising two oppositely disposed edges separating and contiguous with two oppositely disposed curved edges, wherein the two oppositely disposed curved edges together define a first circular arc;
- a channel disposed within the protrusion between the two oppositely disposed curved edges, wherein the channel faces away from the bottom heel surface;
- a removable heel comprising an open-ended slot defining a portion of a second circular arc, wherein the portion of the second circular arc is configured to snugly accept the first circular arc of the protrusion, wherein the removable heel is rotatably attachable to the protrusion; and
- a biased lock attached to the removable heel configured to automatically engage the channel, the biased lock configured to prevent rotation of the removable heel relative to the protrusion and wherein the biased lock may be manually disengaged by the person to release the removable heel from the protrusion.
19. The shoe of claim 18, including at least one stop attached to the removable heel, the at least one stop configured to prevent translation of the removable heel relative to the protrusion
20. The shoe of claim 18, wherein the removable heel is defined as comprising a centerline and wherein the protrusion is defined as comprising a second centerline between the two oppositely disposed curved edges, wherein the protrusion is rotatable within the open-ended slot when the centerline of the removable heel is perpendicular to the second centerline of the protrusion, and wherein the removable heel is pivotable relative to the protrusion in a rotational direction from a first position wherein the centerline of the removable heel is perpendicular with the second centerline of the protrusion to a second position wherein the centerline of the removable heel is aligned with the second centerline of the protrusion.
Type: Application
Filed: Sep 20, 2012
Publication Date: Mar 21, 2013
Inventors: Juliana Lutzi Sherwood (Glendale, CA), Robert Lee Sherwood (Glendale, CA)
Application Number: 13/623,852
International Classification: A43B 21/36 (20060101); A43B 3/24 (20060101);