Patent Description:
Prosthetic devices are used by amputees to replace all of, or some portion of, a limb. For example, prosthetic legs may be used to replace a portion of a person's leg surgically removed at or above the knee. Such prosthetic devices allow the person to walk in a conventional manner by supporting the person's weight and, in some cases, by providing a prosthetic joint at the person's knee that bends and otherwise mimics operation of a human knee. Prosthetic legs may be incorporated at one or both of the person's legs depending on the person's condition.

Prosthetic legs may be used in conjunction with prosthetic feet that are designed to replace the foot of the amputee. As with prosthetic legs, prosthetic feet are designed to allow an amputee to walk in a conventional manner by supporting the person's weight during use. Prosthetic feet are sometimes also designed to flex and bend in an effort to function in a similar manner as a human ankle and foot.

One conventional prosthetic foot is a so-called prosthetic blade that includes a substantially flat member extending from a distal end of a prosthetic leg. Prosthetic blades are typically formed from a resilient material that permits the blade to bend and flex during use while automatically returning to a relaxed state once an applied force is released. Such bending and flexing of the prosthetic blade is enhanced by the generally curved shape of the blade that facilitates bending and flexing when the blade comes in contact with the ground during use. The foregoing properties of prosthetic blades allow the blades to absorb energy associated with ground-contacting forces and, as such, provide an amputee with a degree of comfort during use. Further, such bending and flexing provides the amputee with an energy return during walking and running movements that enhances the performance of the amputee during such movements.

While prosthetic blades provide an amputee with the ability to walk and run, such blades do not typically include a ground-contacting surface suitable for all potential activities. Accordingly, prosthetic blades may be fitted with an outsole that is affixed to the blade using an adhesive to restrict relative movement between the material of the blade and the material of the outsole. While such outsoles protect the blade during use and, further, enhance the traction of the blade with the ground during some uses, such outsoles are difficult to attach and, further, are even more difficult to remove. Accordingly, the few outsoles currently used in conjunction with prosthetic blades cannot be easily interchanged with one another for use in a particular activity or with a particular ground surface. <CIT> discloses a prosthetic foot having an adjustable ankle, and having upper and lower portions. <CIT> discloses an artificial leg for attachment to a socket comprising a metal load bearing member having a lockable ball and socket joint at each end for universal adjustment. <CIT> discloses a pyramidal link plate assembly for coupling a prosthetic limb upright assembly to another prosthetic limb component. <CIT> discloses a traction device for a prosthetic running foot having a curved profile and mechanisms for attaching the traction device to the prosthetic running foot.

The drawings described herein are for illustrative purposes only of selected configurations and not all possible implementations, and are not intended to limit the scope of the present disclosure.

An attachment system for use with a prosthetic device is provided. The attachment system includes a first component including a first surface, and further including one of a channel and a projection disposed on an opposite side of the first component than the first surface. The system also includes a second component including a second surface, and further including the other of the channel and the projection disposed on an opposite side of the second component than the second surface, the other of the channel and the projection slidably engaging the one of the channel and the projection to selectively couple the first component and the second component together. One of the first surface and the second surface is operable to be attached to the prosthetic device, and the other of the first surface and the second surface is operable to be attached to a sole structure having a ground-engaging surface.

Implementations of the disclosure may include one or more of the following optional features. In some implementations, the channel matingly receives the projection therein. The projection may include a first portion that is disposed at a junction of the prosthetic device and the one of the first surface and the second surface and a second portion that is spaced apart from the first portion and is received by the channel, whereby the projection has a cross-section that is wider at the second portion than at the first portion to restrict removal of the projection from the channel. The channel and the projection may cooperate to selectively provide a dovetail connection between the first component and the second component.

The sole structure may include a cushioning layer disposed between the other of the first surface and the second surface and the ground-engaging surface. In some examples, the ground-engaging surface is formed by the cushioning layer. The ground-engaging surface may be formed by an outsole layer that is attached to the cushioning layer.

In some implementations, the attachment system includes a latch mechanism operable to fix a relative position between the first component and the second component. The latch mechanism may be automatically moved into a latched state to fix the relative position between the first component and the second component when the projection is moved into the channel a predetermined distance. The latch mechanism may include a male component that is fixed for movement with one of the first component and the second component and a female component that is fixed for movement with the other of the first component and the second component, the female component receiving the male component and securing the male component to the female component when the projection is moved the predetermined distance into the channel. The latch mechanism may also include a latching element fixed for movement with one of the first component and the second component, and further includes a latching feature fixed for movement with the other of the first component and the second component, the latching element operable to be actuated by and to engage the latching feature in response to a sliding engagement between the first component and the second component. The other of the first component and the second component may include a ramping surface operable to deflect the latching element and to position the latching element into engagement with the latching feature in response to the one of the first component and the second component slidingly engaging with the other of the first component and the second component.

In some examples, the prosthetic device is a foot prosthetic device or the prosthetic device may be a blade prosthetic device. The first component and the second component may be elongated components.

Another aspect of the disclosure provides an attachment system for use with a prosthetic device. The attachment includes a first elongate component attached to the prosthetic device and a second elongate component attached to a sole structure having a ground-engaging surface. The second elongate component slidably engages the first elongate component to attach the sole structure to the prosthetic device.

This aspect may include one or more of the following optional features. In some implementations, the second elongate component matingly receives the first elongate component therein. The first elongate component may include a projection extending from a surface of the prosthetic device. The projection may include a first portion disposed at a junction of the projection and the surface of the prosthetic device and a second portion that is spaced apart from the first portion and is received by a channel. A cross-section of the projection may be wider at the second portion than at the first portion. The channel and the projection may cooperate to selectively provide a dovetail connection between the first elongate component and the second elongate component. In some examples, the sole structure includes a cushioning layer disposed between the second elongate component and the ground-engaging surface. The ground-engaging surface may be formed by the cushioning layer. The ground-engaging surface may be formed by an outsole layer that is attached to the cushioning layer.

In some implementations, the attachment system includes a latch mechanism operable to selectively fix a relative position between the first elongate component and the second elongate component. The latch mechanism may be automatically moved into a latched state to fix the relative position between the first elongate component and the second elongate component when the first elongate component is moved into the second elongate component a predetermined distance. The latch mechanism may include a male component that is fixed for movement with one of the first elongate component and the second elongate component, and further includes a female component that is fixed for movement with the other of the first elongate component and the second elongate component. The female component may receive the male component and secure the male component to the female component when the first elongate component is moved the predetermined distance into the second elongate component. In some examples, the latch mechanism includes a latching element fixed for movement with one of the first elongate component and the second elongate component, and a latching feature fixed for movement with the other of the first elongate component and the second elongate component. The latching element may be operable to be moved relative to the one of the first elongate component and the second elongate component to engage the latching feature.

In some examples, the other of the first elongate component and the second elongate component includes a ramping surface operable to deflect the latching element and to position the latching element into engagement with the latching feature. The prosthetic device may be a foot prosthetic device. The prosthetic device may be a blade prosthetic device, in some examples. The first elongate component may be integrally formed with the prosthetic device.

Yet another aspect of the disclosure provides an attachment system for a prosthetic device. The attachment system includes a first component attached to the prosthetic device and including a first latch mechanism, and a second component selectively attachable to the first component. The second component includes a second latch mechanism and a ground-engaging surface. The second latch mechanism is configured and disposed to latchingly engage with the first latch mechanism when the first component is moved a predetermined distance relative to the second component in a first direction.

This aspect may include one or more of the following optional features. In some implementations, the second latch mechanism is disposed on an opposite side of the second component than the ground-engaging surface. The second component may be slidably attached to the first component. The first component may include one of a projection and a channel and the second component includes the other of the projection and the channel. The channel may receive the projection to guide movement of the first component relative to the second component.

In some examples, the projection is matingly received by the channel and is permitted to slide relative to and within the channel to permit movement of the first component relative to the second component in the first direction. The projection may include a first end that is attached to one of the first component and the second component and a second end that is spaced apart from the first end and is received by the channel of the other of the first component and the second component. The projection may have a cross-section that increases in width from the first end to the second end to restrict removal of the projection from the channel. A second portion may include a cushioning layer disposed between the prosthetic device and the ground-engaging surface. In some examples, the ground-engaging surface is formed by the cushioning layer. The ground-engaging surface may be formed by an outsole layer that is attached to the cushioning layer.

In some examples, the first latch mechanism includes one of a male component and a female component that is fixed for movement with the first component. The second latch mechanism may include the other of the male component and the female component, the female component being fixed for movement with the second component and may receive the male component to secure the male component to the female component when the first component is moved the predetermined distance in the first direction.

Yet another aspect of the disclosure provides an attachment system for a prosthetic device. The attachment system includes a first component fixed for movement with the prosthetic device and a second component that matingly receives the first component and includes a ground-engaging surface. The second component is automatically secured to the first component when the first component is moved a predetermined distance relative to the second component in a first direction.

This aspect may include one or more of the following optional features. In some implementations, the first component includes a first latch mechanism and the second component includes a second latch mechanism. The second latch mechanism may engage the first latch mechanism when the first component is moved the predetermined distance relative to the second component in the first direction. The first latch mechanism may include one of a male component and a female component that is fixed for movement with the first component and the second latch mechanism includes the other of the male component and the female component. The female component may be fixed for movement with the second component and may receive the male component to secure the male component to the female component when the first component is moved the predetermined distance in the first direction. The second latch mechanism may be disposed on an opposite side of the second component than the ground-engaging surface. The second component may be slidably attached to the first component. In some examples, the first component includes one of a projection and a channel and the second component includes the other of the projection and the channel. The channel may receive the projection to guide movement of the first component relative to the second component.

In some implementations, the projection is matingly received by the channel and is permitted to slide relative to and within the channel to permit movement of the first component relative to the second component in the first direction. The projection may include a first end that is attached to one of the first component and the second component and a second end that is spaced apart from the first end and is received by the channel of the other of the first component and the second component. The projection may have a cross-section that increases in width from the first end to the second end to restrict removal of the projection from the channel. In some examples, the second component includes a cushioning layer, the cushioning layer being disposed between the prosthetic device and the ground-engaging surface. The ground-engaging surface may be formed by the cushioning layer. The ground-engaging surface may also be formed by an outsole layer that is attached to the cushioning layer.

With reference to the figures, an attachment system <NUM> for use with a prosthetic device <NUM> is provided. The prosthetic device <NUM> may be a foot prosthetic device and, further, may be a so-called prosthetic "blade" that may be attached to a lower portion of a person's leg. For example, the prosthetic blade <NUM> may be attached to a distal end of a prosthetic leg and is positioned to provide the person with support during walking and running movements. While the prosthetic device <NUM> could be any prosthetic device, the prosthetic device <NUM> will be described hereinafter as being a prosthetic blade.

The prosthetic blade <NUM> includes a proximal end <NUM> and a distal end <NUM> disposed on an opposite end of the prosthetic blade <NUM> than the proximal end <NUM>. A body portion <NUM> extends between and connects the proximal end <NUM> and the distal end <NUM>. The body portion <NUM> includes a generally curved shape and includes a substantially concave surface <NUM> and a substantially convex surface <NUM> disposed on an opposite side of the body portion <NUM> than the concave surface <NUM>. The body portion <NUM> may be formed from metal and/or carbon fiber. The material of the body portion <NUM> along with its generally curved shape allow the prosthetic blade <NUM> to function as a spring during use which, in turn, provides a user with shock absorption and energy return during walking and running movements.

The proximal end <NUM> may include an attachment feature <NUM> for use in attaching the prosthetic blade <NUM> to a person's leg. For example, the attachment feature <NUM> may be an aperture that receives a fastener (not shown) for use in attaching the prosthetic blade <NUM> to a distal end of a prosthetic leg.

The attachment system includes a first component <NUM> and a second component <NUM> that cooperate to selectively attach a sole structure <NUM> to the prosthetic blade <NUM>. The first component <NUM> is shown as being attached to the prosthetic blade <NUM> while the second component <NUM> is shown as being attached to the sole structure <NUM>. While the first component <NUM> is shown as being attached to the prosthetic blade <NUM> and the second component <NUM> is shown as being attached to the sole structure <NUM>, the first component <NUM> could alternatively be attached to the sole structure <NUM> and the second component <NUM> could be attached to the prosthetic blade <NUM>.

The first component <NUM> includes a rail <NUM> that projects from the convex surface <NUM> of the body portion <NUM>. The rail <NUM> may be integrally formed with the body portion <NUM> of the prosthetic blade <NUM> or, alternatively, may be fixedly attached to the body portion <NUM> at the convex surface <NUM>. If the rail <NUM> is integrally formed with the body portion <NUM>, the rail may be machined into the shape shown in <FIG> and <FIG>. If the rail <NUM> is separately formed from the body potion <NUM>, the rail <NUM> may be attached to the body portion <NUM> via a mechanical fastener such as a bolt and/or adhesive.

The rail <NUM> includes a projection extending from a first end <NUM> to a second end <NUM>. The first end <NUM> is disposed adjacent to the convex surface <NUM> of the body portion <NUM> and includes a first width (W<NUM>). The second end <NUM> is disposed at an opposite end of the rail <NUM> than the first end <NUM> and includes a second width (W<NUM>). As shown in <FIG>, the second width (W<NUM>) is larger than the first width (W<NUM>).

In one configuration, the rail <NUM> is a tapered projection that has a constant taper extending from the first end <NUM> to the second end <NUM>. Further, the rail <NUM> includes a substantially planar surface <NUM> disposed at the second end <NUM> and defining a width of the rail <NUM> at the second end. A length of the rail <NUM> extends from the distal end <NUM> of the body portion <NUM> in a direction toward the proximal end <NUM> of the body portion <NUM>. The length is greater than the width and, as such, the rail <NUM> is an elongate component extending along a longitudinal axis (L) of the body portion <NUM>.

The second component <NUM> includes a main body <NUM> having a projection <NUM> and a flange <NUM> extending from the projection <NUM>. The main body <NUM> is disposed between and connects the first component <NUM> and the sole structure <NUM>. Because the first component <NUM> is attached to the prosthetic blade <NUM>, connecting the first component <NUM> to the sole structure <NUM> via the main body <NUM> likewise connects the sole structure <NUM> to the prosthetic blade <NUM>.

The projection <NUM> extends in a direction away from the sole structure <NUM> toward the first component <NUM> and includes a channel <NUM> formed therein. The channel <NUM> extends along a length of the second component <NUM> and in a direction along the longitudinal axis (L) of the body portion <NUM> to a similar extent as the first component <NUM>. As such, the second component <NUM> is similarly an elongate component. The channel <NUM> includes a shape that matingly receives the profile of the rail <NUM>. Specifically, the channel <NUM> includes a first end <NUM> having a first width (W<NUM>) and a second end <NUM> having a second with (W<NUM>), whereby the first width (W<NUM>) is less than the second width (W<NUM>). If the first component <NUM> includes a tapered projection, the channel <NUM> may likewise include a taper that matches the taper of the first component <NUM> to allow the channel <NUM> to matingly receive the rail <NUM> of the first component <NUM>. While the first component <NUM> and the second component <NUM> are both described as being elongate components, the first component <NUM> and the second component <NUM> may have the same length or different lengths. For example, the first component <NUM> may include a shorter or longer length than the second component <NUM>. Further yet, second components <NUM> having different lengths may be used with the same first component <NUM> at different times to allow the first component <NUM> to be a universal component.

As shown in <FIG>, the flange <NUM> extends outward from the projection <NUM> and over the sole structure <NUM>. The flange <NUM> defines an outer edge <NUM> that corresponds generally to an outer edge <NUM> of the sole structure <NUM>. As such, the outer edge <NUM> of the flange <NUM> is substantially flush with the outer edge <NUM> of the sole structure <NUM>. While the outer edge <NUM> is described and shown as being substantially flush with the outer edge <NUM>, the outer edge <NUM> could alternatively be recessed from or extend over the outer edge <NUM>.

In operation, the channel <NUM> slidably receives the rail <NUM> to attach the first component <NUM> to the second component <NUM> and, thus, the sole structure <NUM> to the prosthetic blade <NUM>. Namely, the distal end <NUM> of the prosthetic blade <NUM> is first inserted into the channel <NUM> at an opening <NUM> of the channel <NUM> (<FIG>). The second component <NUM> and, thus, the sole structure <NUM>, are moved along and relative to the rail <NUM> until the distal end <NUM> of the prosthetic blade <NUM> contacts a stop surface <NUM> of the second component <NUM>. Contact between the distal end <NUM> and the stop surface <NUM> prevents further movement of the second component <NUM> and sole structure <NUM> in a direction (D) shown in <FIG>. In this state, the sole structure <NUM> is attached and properly positioned relative to the prosthetic blade <NUM> via the attachment system <NUM>.

The sole structure <NUM> is restricted from disengaging the prosthetic blade <NUM> due to the shape of the rail <NUM> and mating channel <NUM>. Namely, because the width (W<NUM>) is greater than the width (Wi), movement of the rail <NUM> and, thus, the prosthetic blade <NUM>, in a direction (Z; <FIG>) relative to and away from the sole structure <NUM> is restricted. Specifically, if a force is exerted on the first component <NUM> in the direction (Z), the force is transmitted to the main body <NUM> of the second component <NUM> via the rail <NUM>. The second component <NUM> moves with the rail <NUM> in the direction (Z) due to the shape of the rail <NUM> and channel <NUM>. In one configuration, the rail <NUM> and the channel <NUM> cooperate to form a dovetail joint, thereby connecting the rail <NUM> and channel <NUM> together. This connection fixes the first component <NUM> to the second component <NUM> such that these components <NUM>, <NUM> are fixed for movement in the Z direction.

While the shape of the rail <NUM> and the mating channel <NUM> are described and shown as including a dovetail joint, the rail <NUM> and mating channel <NUM> could have another shape. Namely, the rail <NUM> could have virtually any shape that includes a narrower cross section proximate to the prosthetic blade <NUM> than at the second end <NUM>. For example, the rail <NUM> may include a stem and bulb configuration, whereby the stem is attached to the prosthetic blade <NUM> at the first end <NUM> and the bulb extends from the stem and defines the second end <NUM>. Similarly, the rail <NUM> may include a cross section having a "T" shape with the stem of the "T" shape being connected to the prosthetic blade <NUM> and defining the first end <NUM> and the cross member of the "T" shape extending from the stem and defining the second end <NUM>. Finally, the rail could include a circular or oval cross section with an outer perimeter attached to the prosthetic blade <NUM>. Each of the foregoing configurations may be matingly received by a corresponding channel <NUM> to provide for slidable engagement between the first component <NUM> and the second component <NUM> while restricting disengagement between these components <NUM>, <NUM> in the direction (Z).

Removal of the rail <NUM> from the channel <NUM> may be accomplished by applying a force on the second component in a direction opposite to direction (D). The force causes the rail <NUM> to slide relative to and within the channel <NUM> as the second component <NUM> moves in the direction opposite to direction (D). In so doing, the distal end <NUM> of the prosthetic blade <NUM> disengages and moves away from the stop surface <NUM>. Movement of the second component <NUM> relative to the first component <NUM> continues until the rail <NUM> exits the channel <NUM> at the opening <NUM>. At this point, the second component <NUM> and sole structure <NUM> are disconnected from the first component <NUM> and prosthetic blade <NUM>.

The attachment system <NUM> may be used to attach different sole structures <NUM> to the prosthetic blade <NUM>. For example, the attachment system <NUM> may be used to attach a particular sole structure <NUM> for use in a particular activity, thereby providing the user with a sole structure that is designed for the particular activity.

The sole structure <NUM> shown in <FIG> includes a midsole <NUM> and an outsole <NUM>. The midsole <NUM> is disposed between the second component <NUM> and the outsole <NUM> and may be attached to both the second component <NUM> and the outsole via a suitable adhesive. Specifically, an adhesive may be applied to the flange <NUM> of the second component <NUM> on an opposite side of the second component <NUM> than the projection <NUM>. Similarly, an adhesive may be applied to the outsole <NUM> at a surface <NUM> disposed on an opposite side of the outsole <NUM> than a ground-contacting surface <NUM>. The adhesive attaches the midsole <NUM> to the second component <NUM> at the flange <NUM> and attaches the midsole <NUM> to the outsole <NUM> at the surface <NUM>.

The midsole <NUM> provides a degree of cushioning to the sole structure <NUM> and may be formed from a foamed polymer material and/or may be a fluid-filled chamber. If the midsole <NUM> is a fluid-filled chamber, the midsole <NUM> may be formed by joining two sheets of polymer material together to define a chamber therebetween. The chamber may be filled with a fluid such as, for example, air, and may be pressurized. Regardless of the particular construction of the midsole <NUM>, the midsole <NUM> is disposed between and is attached to the flange <NUM> on one side of the midsole <NUM> and is attached to the outsole <NUM> on the other side of the midsole <NUM>. The materials and constructions of the midsole <NUM> are not limited to the described exemplary configurations. As such, other materials and constructions of midsole cushioning structures are also intended to be within the scope of the present disclosure.

The outsole <NUM> shown in <FIG> includes a series of treads <NUM>. The treads <NUM> are formed into the material of the outsole <NUM> and provide the outsole <NUM> with a tread pattern suitable for walking and/or running on a substantially smooth surface (i.e., concrete or asphalt). The outsole <NUM> may be formed from an abrasion-resistant material such as, for example, rubber that provides a degree of friction between the outsole <NUM> and a ground surface or other underlying substrate surface during use. Alternatively, the outsole <NUM> can provide a degree of relatively low frictional engagement between the outsole and an underlying surface, such as an ice skating blade, a curling shoe outsole, a bowling shoe outsole, or other materials or constructions that allow sliding of a user's foot relative to an underlying surface as may be typical and beneficial during many activities, as will be recognized by a person of ordinary skill in the art in view of this description and the accompanying drawing figures. Further, the outsole <NUM> may include a binding or a cleat that is matingly received in a catch (none shown), to allow the outsole <NUM> and, thus, the sole structure <NUM> and prosthetic blade <NUM>, to be attached to an external structure such as a bike pedal or ski boot binding.

The midsole <NUM> and the outsole <NUM> may also be used as a "spacer" that allows the prosthetic blade <NUM> to provide the user with an effective leg length that is approximately the same as the user's other leg. For example, a number of different second components <NUM> may be provided that each include a different thickness, as measured in a direction extending from the outsole <NUM> to the midsole <NUM>. The different thicknesses of the various second components <NUM> allow the user to select a particular second component <NUM> that results in the effective length of the leg having the prosthetic blade <NUM> and sole structure <NUM> being the same as the user's other leg. Accordingly, the user can select the appropriate second component <NUM> based on the article of footwear in use on the user's other leg. For example, a second component <NUM> having a larger thickness could be used when the user's is wearing a high-heel shoe on the foot of the other leg to accommodate for the height of the high-heel shoe and a second component <NUM> having a reduced thickness could be used when the user is wearing a flat-bottom shoe on the foot of the other leg.

With particular reference to <FIG>, a sole structure 30a is provided and includes an outsole 62a having a series of cleats <NUM>. In view of the substantial similarity in structure and function of the components associated with the sole structure <NUM> with respect to the sole structure 30a, like reference numerals are used hereinafter and in the drawings to identify like components while like reference numerals containing letter extensions are used to identify those components that have been modified.

The cleats <NUM> extend from the outsole 62a and provide the sole structure 30a with the ability to grip a ground surface such a natural or synthetic turf surface during use. As such, the sole structure 30a may be attached to the prosthetic blade <NUM> via the attachment system <NUM> when a user participates in an athletic activity such as football, soccer, or lacrosse.

With particular reference to <FIG>, a sole structure 30b is provided and includes an outsole 62b having a series of spikes <NUM>. In view of the substantial similarity in structure and function of the components associated with the sole structure 30b with respect to the sole structure <NUM>, like reference numerals are used hereinafter and in the drawings to identify like components while like reference numerals containing letter extensions are used to identify those components that have been modified.

The spikes <NUM> extend from the outsole 62b and provide the sole structure 30b with the ability to grip a ground surface such a natural or synthetic track surface during use. As such, the sole structure 30b may be attached to the prosthetic blade <NUM> via the attachment system <NUM> when a user participates in an athletic activity such as a track-and-field competition.

With particular reference to <FIG>, a sole structure 30c is provided and includes an outsole 62c having a series of treads 68c. In view of the substantial similarity in structure and function of the components associated with the sole structure 30c with respect to the sole structure <NUM>, like reference numerals are used hereinafter and in the drawings to identify like components while like reference numerals containing letter extensions are used to identify those components that have been modified.

The treads 68c extend from the outsole <NUM> and provide the sole structure 30c with the ability to grip a ground surface such as loose dirt, rocks, and/or snow during use. As such, the sole structure 30c may be attached to the prosthetic blade <NUM> via the attachment system <NUM> when a user participates in an activity such as hiking.

The various sole structures <NUM>, 30a, 30b, 30c may be selectively attached to the prosthetic blade <NUM> via the attachment system <NUM>. Namely, each of the sole structures30, 30a, 30b, 30c may include a dedicated second component <NUM> that allow the respective sole structures <NUM>, 30a, 30b, 30c to be attached to the same rail <NUM> at different times. As such, the prosthetic blade <NUM> can include a single rail <NUM> but may be used with a variety of sole structures <NUM>, 30a, 30b, 30c. Further, such sole structures <NUM>, 30a, 30b, 30c are easily interchanged with one another by removing the rails <NUM> from one of the sole structures <NUM>, 30a, 30b, 30c and attaching it to another of the sole structures <NUM>, 30a, 30b, 30c. Providing the foregoing relationship between the rail <NUM> and the second component <NUM> of the various sole structures <NUM>, 30a, 30b, 30c allows a user to quickly and easily change the sole structure <NUM>, 30a, 30b, 30c attached to the prosthetic blade <NUM>. As such, a user can quickly and easily tailor the prosthetic blade <NUM> for use in different activities (i.e., running, hiking, etc.).

As described above, the attachment system <NUM> utilizes a stop surface <NUM> of the second component <NUM> to properly position the second component <NUM> and the sole structure <NUM> relative to the first component <NUM> and prosthetic blade <NUM>. The stop surface <NUM> ensures that the second component <NUM> and, thus, the sole structure <NUM> is moved a predetermined distance along the rail <NUM> to properly position the sole structure <NUM> relative to the prosthetic blade <NUM>. The connection between the rail <NUM> and the channel <NUM> restricts detachment of the first component <NUM> from the second component <NUM> in the direction (Z; <FIG>). However, while the first component <NUM> and the second component <NUM> are attached to one another via interaction between the rail <NUM> and channel <NUM>, movement of the second component along the rail <NUM> (i.e., along the longitudinal axis (L) of the prosthetic blade <NUM>) is only restricted by the friction between the rail <NUM> and the channel <NUM>.

A latch mechanism <NUM> may be used to fix a position of the second component <NUM> relative to the first component <NUM>. Fixing a position of the second component <NUM> relative to the first component likewise fixes a position of the sole structure <NUM> relative to the prosthetic blade <NUM>.

With reference to <FIG>, <FIG>, and <FIG>, the latch mechanism <NUM> includes a first latch component <NUM> attached to the prosthetic blade <NUM> and a second latch component <NUM> attached to the second component <NUM>. While the first latch component <NUM> is shown and described as being attached to the prosthetic blade <NUM> and the second latch component <NUM> is shown and described as being attached to the second component <NUM>, the first latch component <NUM> could alternatively be attached to the second component <NUM> and the second latch component <NUM> could alternatively be attached to the prosthetic blade <NUM>.

The first latch component <NUM> includes an opening <NUM> and a pair of apertures <NUM> disposed on side surfaces of the latch component <NUM> and positioned substantially ninety degrees (<NUM>°) relative to the opening <NUM>. The second latch mechanism <NUM> includes a locating tab <NUM> and a pair of latch elements <NUM> extending from a base <NUM>. The second latch mechanism <NUM> may be formed from a resilient material such as, for example, plastic and may be movable from a relaxed state to a compressed state.

The first latch component <NUM> may be positioned relative to the rail <NUM> such that when the second component <NUM> is moved the predetermined distance relative to the first component <NUM> and the distal end <NUM> of the prosthetic blade <NUM> engages the stop surface <NUM>, the second latch component <NUM> is received by the first latch component <NUM>. Specifically, the locating tab <NUM> may enter the first latch component <NUM> and may guide the second latch component <NUM> into the first latch component <NUM>.

Once the second latch component <NUM> is sufficiently received by the first latch component <NUM>, a force is applied to the latch elements <NUM> by walls <NUM> (<FIG>) of the first latch component <NUM> to move the latch elements <NUM> from the relaxed state to the compressed state. When the distal end <NUM> of the prosthetic blade <NUM> contacts the stop surface <NUM>, the latch elements <NUM> oppose respective ones of the apertures <NUM>. At this point, the resilient nature of the material of the second latch component <NUM> causes the latch elements <NUM> to automatically return to the relaxed state and protrude from the apertures <NUM> (<FIG>). At this point, the first component <NUM> and the second component <NUM> are attached to one another and relative movement therebetween is restricted due to engagement between the latch elements <NUM> and the respective apertures <NUM>. Accordingly, relative movement between the first component <NUM> and the second component <NUM> along the longitudinal axis (L) of the prosthetic blade <NUM> is restricted and the position of the sole structure <NUM> relative to the prosthetic blade <NUM> is maintained.

The second latch component <NUM> may be removed from the first latch component <NUM> by applying a force on the latch elements <NUM> in a direction (X; <FIG>). Applying a force on the latch elements <NUM> in the direction (X) moves the latch elements <NUM> from the relaxed state to the compressed state and removes the latch elements <NUM> from the apertures <NUM>. Once the latch elements <NUM> are removed from the apertures <NUM>, the second latch component <NUM> may be removed from the first latch component <NUM> by moving the second latch component <NUM>-along with the second component <NUM> and sole structure <NUM>—in a direction away from the first latch component <NUM>. Removing the second latch component <NUM> from the first latch component <NUM> allows the channel <NUM> to move relative to and along the rail <NUM>. Sufficient movement of the channel <NUM> relative to and along the rail <NUM> allows the channel <NUM> to disengage the rail <NUM>. Once disengaged from the channel <NUM>, the rail <NUM> may be attached to another of the sole structures <NUM>, 30a, 30b, 30c.

With reference to <FIG>, another latch mechanism 74a for use with the attachment system <NUM> is provided. In view of the substantial similarity in structure and function of the components associated with the latch mechanism <NUM> with respect to the latch mechanism 74a, like reference numerals are used hereinafter and in the drawings to identify like components while like reference numerals containing letter extensions are used to identify those components that have been modified.

The latch mechanism 74a includes a first latch component 76a attached to the prosthetic blade <NUM> and a second latch component 78a attached to the second component <NUM>. While the first latch component 76a is shown and described as being attached to the prosthetic blade <NUM> and the second latch component 78a is shown and described as being attached to the second component <NUM>, the first latch component 76a could alternatively be attached to the second component <NUM> and the second latch component 78a could alternatively be attached to the prosthetic blade <NUM>.

The first latch component 76a includes a notch <NUM> having an engagement surface <NUM>. The second latch mechanism 78a includes a latch element 86a extending from a base 88a. The second latch mechanism 78a may be formed from a resilient material such as, for example, plastic and may be movable from a relaxed state to a flexed state.

The first latch component 76a may be positioned relative to the rail <NUM> such that when the second component <NUM> is moved the predetermined distance relative to the first component <NUM> and the distal end <NUM> of the prosthetic blade <NUM> engages the stop surface <NUM>, the second latch component 78a is received by the first latch component 76a. Specifically, the latch element 86a is received by the notch <NUM> to fix a position of the second latch component 78a relative to the first latch component 76a.

Once the second latch component 78a is sufficiently received by the first latch component 76a, the latch element 86a is moved from the flexed state to the relaxed state and drops into the notch <NUM>. Namely, a sloped surface <NUM> of the latch element 86a rides along the first latch component 76a and positions the latch element 86a in the flexed state. When the latch element 86a encounters the notch <NUM>, the latch element 86a is automatically moved into the relaxed state due to the resilient nature of the material of the latch element 86a and drops into the notch <NUM>. In so doing, a latch surface <NUM> of the latch element 86a engages the engagement surface <NUM> of the first latch component 76a, thereby fixing a position of the first component <NUM> relative to the second component <NUM>. At this point, the first component 76a and the second component 78a are attached to one another and relative movement therebetween is restricted due to engagement between the latch element 86a and the engagement surface <NUM>. Accordingly, relative movement between the first component <NUM> and the second component <NUM> along the longitudinal axis (L) of the prosthetic blade <NUM> is restricted and the position of the sole structure <NUM> relative to the prosthetic blade <NUM> is maintained.

The second latch component 78a may be removed from the first latch component 76a by applying a force on the latch element 86a in a direction (Y; <FIG>). Applying a force on the latch element 86a in the direction (Y) moves the latch element 86a from the relaxed state to the flexed state and removes the latch element 86a from the notch <NUM>. Once the latch element 86a is removed from the notch <NUM>, the second latch component 78a may be removed from the first latch component 76a by moving the second latch component 78a-along with the second component <NUM> and sole structure <NUM>—in a direction away from the first latch component 76a. Removing the second latch component 78a from the first latch component 76a allows the channel <NUM> to move relative to and along the rail <NUM>. Sufficient movement of the channel <NUM> relative to and along the rail <NUM> allows the channel <NUM> to disengage the rail <NUM>. Once disengaged from the channel <NUM>, the rail <NUM> may be attached to another of the sole structures <NUM>, 30a, 30b, 30c.

With reference to <FIG>, another latch mechanism 74b for use with the attachment system <NUM> is provided. In view of the substantial similarity in structure and function of the components associated with the latch mechanism <NUM> with respect to the latch mechanism 74b, like reference numerals are used hereinafter and in the drawings to identify like components while like reference numerals containing letter extensions are used to identify those components that have been modified.

The latch mechanism 74b includes a first latch component 76b attached to the prosthetic blade <NUM> and a second latch component 78b attached to the second component <NUM>. While the first latch component 76b is shown and described as being attached to the prosthetic blade <NUM> and the second latch component 78b is shown and described as being attached to the second component <NUM>, the first latch component 76b could alternatively be attached to the second component <NUM> and the second latch component 78b could alternatively be attached to the prosthetic blade <NUM>.

The first latch component 76b includes a notch <NUM> having an engagement surface <NUM>. The second latch mechanism 78b includes a latch element 86b extending from a base 88b. The second latch mechanism 78b may be formed from a resilient material such as, for example, plastic and may be movable from a relaxed state to a flexed state.

The first latch component 76b may be positioned relative to the rail <NUM> such that when the second component <NUM> is moved the predetermined distance relative to the first component <NUM> and the distal end <NUM> of the prosthetic blade <NUM> engages the stop surface <NUM>, the second latch component 78b is received by the first latch component 76b. Specifically, the latch element 86b is received by the notch <NUM> to fix a position of the second latch component 78b relative to the first latch component 76b. Alignment of the latch element 86b and the notch <NUM> may be further achieved by engaging projections <NUM> of the second latch component 78b with stops <NUM> of the first latch component 76b.

Once the second latch component 78b is sufficiently received by the first latch component 76b, the latch element 86b is moved from the flexed state to the relaxed state and drops into the notch <NUM>. Namely, a sloped surface <NUM> of the latch element 86b rides along the first latch component 76b and positions the latch element 86b in the flexed state. When the latch element 86b encounters the notch <NUM>, the latch element 86b is automatically moved into the relaxed state due to the resilient nature of the material of the latch element 86b and drops into the notch <NUM>. In so doing, a latch surface <NUM> of the latch element 86b engages the engagement surface <NUM> of the first latch component 76b, thereby fixing a position of the first component <NUM> relative to the second component <NUM>. At this point, the first component 76b and the second component 78b are attached to one another and relative movement therebetween is restricted due to engagement between the latch element 86b and the engagement surface <NUM>. Accordingly, relative movement between the first component <NUM> and the second component <NUM> along the longitudinal axis (L) of the prosthetic blade <NUM> is restricted and the position of the sole structure <NUM> relative to the prosthetic blade <NUM> is maintained.

The second latch component 78b may be removed from the first latch component 76b by applying a force on the latch element 86b in a direction (W; FIG. Applying a force on the latch element 86b in the direction (W) moves the latch element 86b from the relaxed state to the flexed state and removes the latch element 86b from the notch <NUM>. Once the latch element 86b is removed from the notch <NUM>, the second latch component 78b may be removed from the first latch component 76b by moving the second latch component 78b-along with the second component <NUM> and sole structure <NUM>—in a direction away from the first latch component 76b. Removing the second latch component 78b from the first latch component 76b allows the channel <NUM> to move relative to and along the rail <NUM>. Sufficient movement of the channel <NUM> relative to and along the rail <NUM> allows the channel <NUM> to disengage the rail <NUM>. Once disengaged from the channel <NUM>, the rail <NUM> may be attached to another of the sole structures <NUM>, 30a, 30b, 30c.

With reference to <FIG>, another latch mechanism 74c for use with the attachment system <NUM> is provided. In view of the substantial similarity in structure and function of the components associated with the latch mechanism <NUM> with respect to the latch mechanism 74c, like reference numerals are used hereinafter and in the drawings to identify like components while like reference numerals containing letter extensions are used to identify those components that have been modified.

The latch mechanism 74c includes a first latch component 76c attached to the prosthetic blade <NUM> and a second latch component 78c attached to the second component <NUM>. While the first latch component 76c is shown and described as being attached to the prosthetic blade <NUM> and the second latch component 78c is shown and described as being attached to the second component <NUM>, the first latch component 76c could alternatively be attached to the second component <NUM> and the second latch component 78c could alternatively be attached to the prosthetic blade <NUM>.

The first latch component 76c includes a channel <NUM> having an engagement surface 94c and a ramped surface <NUM>. The second latch mechanism 78c includes a latch element 86c extending from a base 88c. The second latch mechanism 78c may be formed from a resilient material such as, for example, plastic and may be movable from a relaxed state to a flexed state.

The first latch component 76c may be positioned relative to the rail <NUM> such that when the second component <NUM> is moved the predetermined distance relative to the first component <NUM> and the distal end <NUM> of the prosthetic blade <NUM> engages the stop surface <NUM>, the second latch component 78c is received by the first latch component 76c. Specifically, the latch element 86c is received by the channel <NUM> to fix a position of the second latch component 78c relative to the first latch component 76c.

Once the second latch component 78c is sufficiently received by the first latch component 76c, the latch element 86c is moved from the relaxed state to the flexed state when the sloped surface <NUM> engages the ramped surface <NUM>. The latch element 86c remains in the flexed state until the latch element 86c traverses the channel <NUM> and the latch surface <NUM> engages the engagement surface 94c. Namely, the sloped surface <NUM> of the latch element 86c rides along the ramped surface <NUM> and positions the latch element 86c in the flexed state. When the latch element 86c traverses the entire channel <NUM>, the latch element 86c is automatically moved into the relaxed state due to the resilient nature of the material of the latch element 86c and is positioned in the configuration shown in <FIG>. In so doing, the latch surface <NUM> of the latch element 86c engages the engagement surface 94c of the first latch component 76c, thereby fixing a position of the first component <NUM> relative to the second component <NUM>. At this point, the first component 76c and the second component 78c are attached to one another and relative movement therebetween is restricted due to engagement between the latch element 86c and the engagement surface 94c. Accordingly, relative movement between the first component <NUM> and the second component <NUM> along the longitudinal axis (L) of the prosthetic blade <NUM> is restricted and the position of the sole structure <NUM> relative to the prosthetic blade <NUM> is maintained.

The second latch component 78c may be removed from the first latch component 76c by applying a force on the latch element 86c in a direction (Q; <FIG>). Applying a force on the latch element 86c in the direction (Q) moves the latch element 86c from the relaxed state to the flexed state and removes the latch element 86c from engagement with the engagement surface 94c. Once the latch element 86c is removed from engagement with the engagement surface 94c, the second latch component 78c may be removed from the first latch component 76c by moving the second latch component 78c-along with the second component <NUM> and sole structure <NUM>—in a direction away from the first latch component 76c. Removing the second latch component 78c from the first latch component 76c allows the channel <NUM> to move relative to and along the rail <NUM>. Sufficient movement of the channel <NUM> relative to and along the rail <NUM> allows the channel <NUM> to disengage the rail <NUM>. Once disengaged from the channel <NUM>, the rail <NUM> may be attached to another of the sole structures <NUM>, 30a, 30b, 30c.

With reference to <FIG>, another latch mechanism 74d for use with the attachment system <NUM> is provided. In view of the substantial similarity in structure and function of the components associated with the latch mechanism <NUM> with respect to the latch mechanism 74d, like reference numerals are used hereinafter and in the drawings to identify like components while like reference numerals containing letter extensions are used to identify those components that have been modified.

The latch mechanism 74d includes a first latch component 76d attached to the prosthetic blade <NUM> and a second latch component 78d attached to the second component <NUM>. While the first latch component 76d is shown and described as being attached to the prosthetic blade <NUM> and the second latch component 78d is shown and described as being attached to the second component <NUM>, the first latch component 76d could alternatively be attached to the second component <NUM> and the second latch component 78d could alternatively be attached to the prosthetic blade <NUM>.

The second latch component 78d includes a latch element 86d extending from a base 88d. The second latch mechanism 78d may be formed from a resilient material such as, for example, plastic and/or rubber and may be movable from a relaxed state to a flexed state.

The first latch component 76d may be positioned relative to the rail <NUM> such that when the second component <NUM> is moved the predetermined distance relative to the first component <NUM> and the distal end <NUM> of the prosthetic blade <NUM> engages the stop surface <NUM>, the second latch component 78d is positioned proximate to the first latch component 76d. Specifically, the latch element 86d opposes a projection <NUM> of the first latch component 76d and may be attached to the projection <NUM> to fix a position of the second latch component 78d relative to the first latch component 76d.

Once the second latch component 78d is sufficiently attached to the first latch component 76d, the latch element 86d is moved from the relaxed state to the flexed state. Specifically, a force may be applied to the latch element 86d to move the latch element 86d from the relaxed state (<FIG>) to the flexed state (<FIG>) and into engagement with the projection <NUM> of the first latch component 76d.

The latch element 86d may include a hook <NUM> that is received by a recess <NUM> of the first latch component 76d when the latch element 86d is returned to the relaxed state. At this point, the first component 76d and the second component 78d are attached to one another and relative movement therebetween is restricted due to engagement between the hook <NUM> of the latch element 86d and the recess <NUM> of the first latch component 76d. Accordingly, relative movement between the first component <NUM> and the second component <NUM> along the longitudinal axis (L) of the prosthetic blade <NUM> is restricted and the position of the sole structure <NUM> relative to the prosthetic blade <NUM> is maintained.

The second latch component 78d may be removed from the first latch component 76d by applying a force on the latch element 86d in a direction (R; <FIG>). Applying a force on the latch element 86d in the direction (R) moves the latch element 86d from the relaxed state to the flexed state and removes the latch element 86d from engagement with the recess <NUM>. Once the latch element 86d is removed from engagement with the recess <NUM>, the second latch component 78d may be removed from the first latch component 76d by moving the second latch component 78d-along with the second component <NUM> and sole structure <NUM>—in a direction away from the first latch component 76d. Removing the second latch component 78d from the first latch component 76d allows the channel <NUM> to move relative to and along the rail <NUM>. Sufficient movement of the channel <NUM> relative to and along the rail <NUM> allows the channel <NUM> to disengage the rail <NUM>. Once disengaged from the channel <NUM>, the rail <NUM> may be attached to another of the sole structures <NUM>, 30a, 30b, 30c.

With reference to <FIG>, another latch mechanism 74e for use with the attachment system <NUM> is provided. In view of the substantial similarity in structure and function of the components associated with the latch mechanism <NUM> with respect to the latch mechanism 74e, like reference numerals are used hereinafter and in the drawings to identify like components while like reference numerals containing letter extensions are used to identify those components that have been modified.

The latch mechanism 74e includes a first latch component 76e attached to the prosthetic blade <NUM> and a second latch component 78e attached to the second component <NUM>. While the first latch component 76e is shown and described as being attached to the prosthetic blade <NUM> and the second latch component 78e is shown and described as being attached to the second component <NUM>, the first latch component 76e could alternatively be attached to the second component <NUM> and the second latch component 78e could alternatively be attached to the prosthetic blade <NUM>.

The first latch component 76e includes a notch 92e having an engagement surface 94e (<FIG>) and a magnet <NUM> located on an opposite side of the first latch component 76e than the notch 92e. As shown in <FIG>, the notch 92e and magnet <NUM> may be located on opposite sides of the body portion <NUM> of the prosthetic blade <NUM> such that the notch 92e is formed into the material of the body portion <NUM> and the magnet <NUM> is recessed into the body portion <NUM>. The second latch mechanism 78e includes a projection <NUM> extending from a base 88e and including at least a portion formed from metal. The base 88e and at least a portion of the projection <NUM> of the second latch mechanism 78e may be formed from a resilient material such as, for example, plastic and may be movable from a relaxed state to a flexed state.

The first latch component 76e may be positioned relative to the rail <NUM> such that when the second component <NUM> is moved the predetermined distance relative to the first component <NUM> and the distal end <NUM> of the prosthetic blade <NUM> engages the stop surface <NUM>, the second latch component 78e is received by the first latch component 76e. Specifically, the latch element 86e is received by the notch 92e to fix a position of the second latch component 78e relative to the first latch component 76e.

Once the second latch component 78e is sufficiently received by the first latch component 76e, the latch element 86e is moved from the flexed state to the relaxed state and drops into the notch 92e. Namely, the projection <NUM> of the latch element 86e rides along the first latch component 76e and positions the latch element 86e in the flexed state. When the latch element 86e encounters the notch 92e, the latch element 86e is automatically moved into the relaxed state due to the resilient nature of the material of the latch element 86e and due to the magnet exerting a force on the projection <NUM> and drops into the notch 92e. In so doing, a latch surface 98e of the latch element 86e engages the engagement surface 94e of the first latch component 76e, thereby fixing a position of the first component <NUM> relative to the second component <NUM>. At this point, the first component 76e and the second component 78e are attached to one another and relative movement therebetween is restricted due to engagement between the latch element 86e and the engagement surface 94e. Accordingly, relative movement between the first component <NUM> and the second component <NUM> along the longitudinal axis (L) of the prosthetic blade <NUM> is restricted and the position of the sole structure <NUM> relative to the prosthetic blade <NUM> is maintained.

The second latch component 78e may be removed from the first latch component 76e by applying a force on the latch element 86e in a direction (S; <FIG>). Applying a force on the latch element 86e in the direction (S) moves the latch element 86e from the relaxed state to the flexed state and removes the latch element 86e from the notch 92e. Once the latch element 86e is removed from the notch 92e, the second latch component 78e may be removed from the first latch component 76e by moving the second latch component 78e-along with the second component <NUM> and sole structure <NUM>—in a direction away from the first latch component 76e. Removing the second latch component 78e from the first latch component 76e allows the channel <NUM> to move relative to and along the rail <NUM>. Sufficient movement of the channel <NUM> relative to and along the rail <NUM> allows the channel <NUM> to disengage the rail <NUM>. Once disengaged from the channel <NUM>, the rail <NUM> may be attached to another of the sole structures <NUM>, 30a, 30b, 30c.

With reference to <FIG>, another latch mechanism 74f for use with the attachment system <NUM> is provided. In view of the substantial similarity in structure and function of the components associated with the latch mechanism <NUM> with respect to the latch mechanism 74f, like reference numerals are used hereinafter and in the drawings to identify like components while like reference numerals containing letter extensions are used to identify those components that have been modified.

The latch mechanism 74f includes a first latch component 76f attached to the prosthetic blade <NUM> and a second latch component 78f attached to the second component <NUM>. While the first latch component 76f is shown and described as being attached to the prosthetic blade <NUM> and the second latch component 78f is shown and described as being attached to the second component <NUM>, the first latch component 76f could alternatively be attached to the second component <NUM> and the second latch component 78f could alternatively be attached to the prosthetic blade <NUM>.

The first latch component 76f includes a channel 104f and a projection <NUM> including an engagement surface 94f formed at a distal end thereof extending into the channel 104f. The second latch mechanism 78f includes a latch element 86f extending from a base 88f and including a series of peaks <NUM> and depressions <NUM> formed between adjacent peaks <NUM>.

The first latch component 76f may be positioned relative to the rail <NUM> such that when the second component <NUM> is moved the predetermined distance relative to the first component <NUM> and the distal end <NUM> of the prosthetic blade <NUM> engages the stop surface <NUM>, the second latch component 78f is received by the first latch component 76f. Specifically, the latch element 86f is received by the channel 104f to fix a position of the second latch component 78f relative to the first latch component 76f.

Once the second latch component 78f is sufficiently received by the first latch component 76f, the latch element 86f is moved into engagement with the engagement surface 94f of the projection <NUM>. Namely, the projection <NUM> moves along the latch element 86f and is received within depressions <NUM> formed between adjacent peaks <NUM>. The latch element 86f may be received within any of the depressions <NUM> depending on the extent to which the latch element 86f extends into the channel 104f. Once movement of the latch element 86f into the channel 104f is stopped and the projection <NUM> is received within a depression <NUM>, the first component 76f and the second component 78f are attached to one another and relative movement therebetween is restricted due to engagement between the latch element 86f and the engagement surface 94f of the projection <NUM>. Accordingly, relative movement between the first component <NUM> and the second component <NUM> along the longitudinal axis (L) of the prosthetic blade <NUM> is restricted and the position of the sole structure <NUM> relative to the prosthetic blade <NUM> is maintained.

The second latch component 78f may be removed from the first latch component 76f by applying a force on a release tab <NUM> to depress the release tab <NUM> and remove the projection <NUM> from engagement with the depressions <NUM>. Specifically, the applied force causes the projection <NUM> to move in the direction (T) and away from the latch element 86f. Once the engagement surface 94f of the projection <NUM> is removed from engagement with the latch element 86f, the second latch component 78f may be removed from the first latch component 76f by moving the second latch component 78f-along with the second component <NUM> and sole structure <NUM>—in a direction away from the first latch component 76f. Removing the second latch component 78f from the first latch component 76f allows the channel <NUM> to move relative to and along the rail <NUM>. Sufficient movement of the channel <NUM> relative to and along the rail <NUM> allows the channel <NUM> to disengage the rail <NUM>. Once disengaged from the channel <NUM>, the rail <NUM> may be attached to another of the sole structures <NUM>, 30a, 30b, 30c.

With reference to <FIG>, another latch mechanism <NUM> for use with the attachment system <NUM> is provided. In view of the substantial similarity in structure and function of the components associated with the latch mechanism <NUM> with respect to the latch mechanism <NUM>, like reference numerals are used hereinafter and in the drawings to identify like components while like reference numerals containing letter extensions are used to identify those components that have been modified.

The latch mechanism <NUM> includes a first latch component <NUM> attached to the prosthetic blade <NUM> and a second latch component <NUM> attached to the second component <NUM>. While the first latch component <NUM> is shown and described as being attached to the prosthetic blade <NUM> and the second latch component <NUM> is shown and described as being attached to the second component <NUM>, the first latch component <NUM> could alternatively be attached to the second component <NUM> and the second latch component <NUM> could alternatively be attached to the prosthetic blade <NUM>.

The first latch component <NUM> includes a buckle <NUM>. The first latch component <NUM> may be positioned relative to the rail <NUM> such that when the second component <NUM> is moved the predetermined distance relative to the first component <NUM> and the distal end <NUM> of the prosthetic blade <NUM> engages the stop surface <NUM>, the second latch component <NUM> is positioned proximate to the first latch component <NUM>. Specifically, the buckle <NUM> receives a belt portion <NUM> of the second latch component <NUM> and may be attached to the belt portion <NUM> to fix a position of the second latch component <NUM> relative to the first latch component <NUM>.

The buckle <NUM> may include a post <NUM> that is received by one of a series of apertures <NUM> associated with the belt portion <NUM>. When the post <NUM> is received in one of the apertures <NUM>, the position of the belt portion <NUM> relative to the buckle <NUM> is substantially fixed. At this point, the first latch component <NUM> and the second latch component <NUM> are attached to one another and relative movement therebetween is restricted due to engagement between the buckle <NUM> and the belt portion <NUM>. Accordingly, relative movement between the first component <NUM> and the second component <NUM> along the longitudinal axis (L) of the prosthetic blade <NUM> is restricted and the position of the sole structure <NUM> relative to the prosthetic blade <NUM> is maintained.

The second latch component <NUM> may be removed from the first latch component <NUM> by applying a force on the post <NUM> to remove the post <NUM> from the belt portion <NUM>. Once the post <NUM> is removed from engagement with the belt portion <NUM>, the second latch component <NUM> may be removed from the first latch component <NUM> by moving the second latch component <NUM>-- along with the second component <NUM> and sole structure <NUM>—in a direction away from the first latch component <NUM>. Removing the second latch component <NUM> from the first latch component <NUM> allows the channel <NUM> to move relative to and along the rail <NUM>. Sufficient movement of the channel <NUM> relative to and along the rail <NUM> allows the channel <NUM> to disengage the rail <NUM>. Once disengaged from the channel <NUM>, the rail <NUM> may be attached to another of the sole structures <NUM>, 30a, 30b, 30c.

The first latch component <NUM> includes a latch post <NUM>. The first latch component <NUM> may be positioned relative to the rail <NUM> such that when the second component <NUM> is moved the predetermined distance relative to the first component <NUM> and the distal end <NUM> of the prosthetic blade <NUM> engages the stop surface <NUM>, the second latch component <NUM> is positioned proximate to the first latch component <NUM>. Specifically, the latch post <NUM> may be inserted into one of a series of apertures <NUM> of the belt portion <NUM> to fix a position of the second latch component <NUM> relative to the first latch component <NUM>.

When the latch post <NUM> is received in one of the apertures <NUM>, the position of the belt portion <NUM> relative to the first latch component <NUM> is substantially fixed. At this point, the first latch component <NUM> and the second latch component <NUM> are attached to one another and relative movement therebetween is restricted due to engagement between the latch post <NUM> and the belt portion <NUM>. Accordingly, relative movement between the first component <NUM> and the second component <NUM> along the longitudinal axis (L) of the prosthetic blade <NUM> is restricted and the position of the sole structure <NUM> relative to the prosthetic blade <NUM> is maintained.

The second latch component <NUM> may be removed from the first latch component <NUM> by removing the latch post <NUM> from the belt portion <NUM>. Once the post <NUM> is removed from engagement with the belt portion <NUM>, the second latch component <NUM> may be removed from the first latch component <NUM> by moving the second latch component <NUM>-along with the second component <NUM> and sole structure <NUM>—in a direction away from the first latch component <NUM>. Removing the second latch component <NUM> from the first latch component <NUM> allows the channel <NUM> to move relative to and along the rail <NUM>. Sufficient movement of the channel <NUM> relative to and along the rail <NUM> allows the channel <NUM> to disengage the rail <NUM>. Once disengaged from the channel <NUM>, the rail <NUM> may be attached to another of the sole structures <NUM>, 30a, 30b, 30c.

With reference to <FIG>, another latch mechanism 74i for use with the attachment system <NUM> is provided. In view of the substantial similarity in structure and function of the components associated with the latch mechanism <NUM> with respect to the latch mechanism 74i, like reference numerals are used hereinafter and in the drawings to identify like components while like reference numerals containing letter extensions are used to identify those components that have been modified.

The latch mechanism 74i includes a first latch component 76i attached to the prosthetic blade <NUM> and a second latch component 78i attached to the second component <NUM>. While the first latch component 76i is shown and described as being attached to the prosthetic blade <NUM> and the second latch component 78i is shown and described as being attached to the second component <NUM>, the first latch component 76i could alternatively be attached to the second component <NUM> and the second latch component 78i could alternatively be attached to the prosthetic blade <NUM>.

The first latch component 76i includes a channel 104i and a recess <NUM> in communication with the channel 104i. The second latch mechanism 78i includes a latch element 86i in selective engagement with a plunger <NUM>. The plunger <NUM> is disposed within the recess <NUM> and extends into the channel 104i. The plunger <NUM> is biased in the direction (M) shown in <FIG> by a biasing member <NUM>. The biasing member <NUM> may be a coil spring that acts on the plunger <NUM> to bias the plunger <NUM> into the channel 104i.

The first latch component 76i may be positioned relative to the rail <NUM> such that when the second component <NUM> is moved the predetermined distance relative to the first component <NUM> and the distal end <NUM> of the prosthetic blade <NUM> engages the stop surface <NUM>, the second latch component 78i is received by the first latch component 76i. Specifically, the latch element 86i is received by the channel 104i to fix a position of the second latch component 78i relative to the first latch component 76i.

Once the second latch component 78i is sufficiently received by the first latch component 76i, the latch element 86i is moved into the channel 104i and into engagement with the plunger <NUM>. Namely, the latch element 86i moves the plunger <NUM> in a direction opposite to direction (M) upon first entering the channel 104i. Once movement of the latch element 86i into the channel 104i is stopped due to the distal end <NUM> of the prosthetic blade <NUM> engaging the stop surface <NUM>, the plunger <NUM> is received by one of a series of detents <NUM> formed in the latch element 86i. Once movement of the latch element 86i into the channel 104i is stopped and the plunger <NUM> is received within a detent <NUM>, the first component 76i and the second component 78i are attached to one another and relative movement therebetween is restricted. Accordingly, relative movement between the first component <NUM> and the second component <NUM> along the longitudinal axis (L) of the prosthetic blade <NUM> is restricted and the position of the sole structure <NUM> relative to the prosthetic blade <NUM> is maintained.

The second latch component 78i may be removed from the first latch component 76i by applying a force on the plunger <NUM> in a direction opposite to direction (M) and against the force exerted on the plunger <NUM> by the biasing member <NUM>. Once the plunger <NUM> is removed from the detent <NUM>, the second latch component 78i may be removed from the first latch component 76i by moving the second latch component 78i-along with the second component <NUM> and sole structure <NUM>—in a direction away from the first latch component 76i. Removing the second latch component 78i from the first latch component 76i allows the channel <NUM> to move relative to and along the rail <NUM>. Sufficient movement of the channel <NUM> relative to and along the rail <NUM> allows the channel <NUM> to disengage the rail <NUM>. Once disengaged from the channel <NUM>, the rail <NUM> may be attached to another of the sole structures <NUM>, 30a, 30b, 30c.

With reference to <FIG>, another latch mechanism 74j for use with the attachment system <NUM> is provided. In view of the substantial similarity in structure and function of the components associated with the latch mechanism <NUM> with respect to the latch mechanism 74j, like reference numerals are used hereinafter and in the drawings to identify like components while like reference numerals containing letter extensions are used to identify those components that have been modified.

The latch mechanism 74j includes a first latch component 76j attached to the prosthetic blade <NUM> and a second latch component 78j attached to the second component <NUM>. While the first latch component 76j is shown and described as being attached to the prosthetic blade <NUM> and the second latch component 78j is shown and described as being attached to the second component <NUM>, the first latch component 76j could alternatively be attached to the second component <NUM> and the second latch component 78j could alternatively be attached to the prosthetic blade <NUM>.

The first latch component 76j includes a recess <NUM> receiving a ball <NUM> and a biasing member <NUM> therein. The biasing member <NUM> biases the ball <NUM> in a direction (N) in a direction away from the recess <NUM>. The second latch mechanism 78j includes a socket <NUM> extending into the second latch component 78j.

The first latch component 76j may be positioned relative to the rail <NUM> such that when the second component <NUM> is moved the predetermined distance relative to the first component <NUM> and the distal end <NUM> of the prosthetic blade <NUM> engages the stop surface <NUM>, the ball <NUM> is automatically received by socket <NUM> due to the biasing force exerted on the ball <NUM> by the biasing member <NUM>.

Once the ball <NUM> is sufficiently received by the socket <NUM>, a position of the first component <NUM> relative to the second component <NUM> is fixed. At this point, the first component 76j and the second component 78j are attached to one another and relative movement therebetween is restricted. Accordingly, relative movement between the first component <NUM> and the second component <NUM> along the longitudinal axis (L) of the prosthetic blade <NUM> is restricted and the position of the sole structure <NUM> relative to the prosthetic blade <NUM> is maintained.

The second latch component 78j may disengaged from the ball <NUM> by moving the second latch component 78j-along with the second component <NUM> and sole structure <NUM>—in a direction away from the first latch component 76j. Removing the socket <NUM> from the ball <NUM> allows the channel <NUM> to move relative to and along the rail <NUM>. Sufficient movement of the channel <NUM> relative to and along the rail <NUM> allows the channel <NUM> to disengage the rail <NUM>. Once disengaged from the channel <NUM>, the rail <NUM> may be attached to another of the sole structures <NUM>, 30a, 30b, 30c.

The first latch component <NUM> includes a channel <NUM> and a recess <NUM> in communication with the channel <NUM>. The second latch mechanism <NUM> includes a latch element <NUM> in selective engagement with a plunger <NUM>. The plunger <NUM> is disposed within the recess <NUM> and extends into the channel <NUM>. The plunger <NUM> is biased in the direction (O) shown in <FIG> by a biasing member <NUM>. The biasing member <NUM> may be a coil spring that acts on the plunger <NUM> to bias the plunger <NUM> into the channel <NUM>.

The first latch component <NUM> may be positioned relative to the rail <NUM> such that when the second component <NUM> is moved the predetermined distance relative to the first component <NUM> and the distal end <NUM> of the prosthetic blade <NUM> engages the stop surface <NUM>, the second latch component <NUM> is received by the first latch component <NUM>. Specifically, the latch element <NUM> is received by the channel <NUM> to fix a position of the second latch component <NUM> relative to the first latch component <NUM>.

Once the second latch component <NUM> is sufficiently received by the first latch component <NUM>, the latch element <NUM> is moved into the channel <NUM> and into engagement with the plunger <NUM>. Namely, the latch element <NUM> moves the plunger <NUM> in a direction opposite to direction (O) upon first entering the channel <NUM> at a rounded, distal end <NUM> of the latch element <NUM>. Once movement of the latch element <NUM> into the channel <NUM> is stopped due to the distal end <NUM> of the prosthetic blade <NUM> engaging the stop surface <NUM>, the plunger <NUM> is received by an aperture <NUM> formed in the latch element <NUM>. Once movement of the latch element <NUM> into the channel <NUM> is stopped and the plunger <NUM> is received within the aperture <NUM>, the first component <NUM> and the second component <NUM> are attached to one another and relative movement therebetween is restricted. Accordingly, relative movement between the first component <NUM> and the second component <NUM> along the longitudinal axis (L) of the prosthetic blade <NUM> is restricted and the position of the sole structure <NUM> relative to the prosthetic blade <NUM> is maintained.

The second latch component <NUM> may be removed from the first latch component <NUM> by applying a force on the plunger <NUM> in a direction opposite to direction (O) and against the force exerted on the plunger <NUM> by the biasing member <NUM>. Once the plunger <NUM> is removed from the aperture <NUM>, the second latch component <NUM> may be removed from the first latch component <NUM> by moving the second latch component <NUM>-along with the second component <NUM> and sole structure <NUM>—in a direction away from the first latch component <NUM>. Removing the second latch component <NUM> from the first latch component <NUM> allows the channel <NUM> to move relative to and along the rail <NUM>. Sufficient movement of the channel <NUM> relative to and along the rail <NUM> allows the channel <NUM> to disengage the rail <NUM>. Once disengaged from the channel <NUM>, the rail <NUM> may be attached to another of the sole structures <NUM>, 30a, 30b, 30c.

The first latch component <NUM> includes a post <NUM> having a pair of projections <NUM> defining a pair of detents <NUM>. The second latch component <NUM> includes a pair of extensions <NUM> formed from a flexible material and extending into a channel <NUM>.

The first latch component <NUM> may be positioned relative to the rail <NUM> such that when the second component <NUM> is moved the predetermined distance relative to the first component <NUM> and the distal end <NUM> of the prosthetic blade <NUM> engages the stop surface <NUM>, the second latch component <NUM> receives the first latch component <NUM>. Specifically, the post <NUM> is received by the channel <NUM> with the extensions <NUM> sliding along respective outer surfaces <NUM> of the post <NUM>. Because the extensions <NUM> are formed from a flexible material, the extensions <NUM> bend into the shape shown in <FIG>. The extensions <NUM>, upon encountering the projections <NUM> bend further until being received within respective detents <NUM>. At this point, a position of the second latch component <NUM> relative to the first latch component <NUM> is fixed.

The second latch component <NUM> may be removed from the first latch component <NUM> by moving the second latch component <NUM>-along with the second component <NUM> and sole structure <NUM>—in a direction away from the first latch component <NUM> to allow the extensions <NUM> to disengage the detents <NUM> and once again slide along the surfaces <NUM> of the post <NUM>. Removing the second latch component <NUM> from the first latch component 76lk allows the channel <NUM> to move relative to and along the rail <NUM>. Sufficient movement of the channel <NUM> relative to and along the rail <NUM> allows the channel <NUM> to disengage the rail <NUM>. Once disengaged from the channel <NUM>, the rail <NUM> may be attached to another of the sole structures <NUM>, 30a, 30b, 30c.

The first latch component <NUM> includes a cage <NUM> including an opening <NUM> and a pair of spring members <NUM> disposed therein. The second latch component <NUM> includes a latch element <NUM> having a shape that approximates a shape of the opening <NUM>.

The first latch component <NUM> may be positioned relative to the rail <NUM> such that when the second component <NUM> is moved the predetermined distance relative to the first component <NUM> and the distal end <NUM> of the prosthetic blade <NUM> engages the stop surface <NUM>, the second latch component <NUM> is received by the cage <NUM>. Specifically, the latch element <NUM> is positioned above the opening <NUM> and exerts a force on the spring members <NUM>, thereby causing the spring members <NUM> to move away from one another. Once fully seated, the latch element <NUM> is retained within the opening <NUM> by the spring members <NUM> acting on the latch element <NUM> in a direction toward one another. At this point, a position of the second latch component <NUM> relative to the first latch component <NUM> is fixed.

The second latch component <NUM> may be removed from the first latch component <NUM> by moving the second latch component <NUM>-along with the second component <NUM> and sole structure <NUM>—in a direction away from the first latch component <NUM> to allow the latch element <NUM> to disengage the spring members <NUM> and be removed from the opening <NUM>. Removing the second latch component <NUM> from the first latch component <NUM> allows the channel <NUM> to move relative to and along the rail <NUM>. Sufficient movement of the channel <NUM> relative to and along the rail <NUM> allows the channel <NUM> to disengage the rail <NUM>. Once disengaged from the channel <NUM>, the rail <NUM> may be attached to another of the sole structures <NUM>, 30a, 30b, 30c.

With reference to <FIG>, another latch mechanism 74n for use with the attachment system <NUM> is provided. In view of the substantial similarity in structure and function of the components associated with the latch mechanism <NUM> with respect to the latch mechanism 74n, like reference numerals are used hereinafter and in the drawings to identify like components while like reference numerals containing letter extensions are used to identify those components that have been modified.

The latch mechanism 74n includes a first latch component 76n attached to the prosthetic blade <NUM> and a second latch component 78n attached to the second component <NUM>. While the first latch component 76n is shown and described as being attached to the prosthetic blade <NUM> and the second latch component 78n is shown and described as being attached to the second component <NUM>, the first latch component 76n could alternatively be attached to the second component <NUM> and the second latch component 78n could alternatively be attached to the prosthetic blade <NUM>.

The first latch component 76n includes a recess <NUM> having a post <NUM> disposed therein. In one configuration, the post <NUM> includes a ball <NUM> disposed at a distal end thereof. The second latch component 78n includes a pair of engagement blocks <NUM> biased toward one another by a pair of biasing members <NUM>. In one configuration, the biasing members <NUM> are coil springs.

The first latch component 76n may be positioned relative to the rail <NUM> such that when the second component <NUM> is moved the predetermined distance relative to the first component <NUM> and the distal end <NUM> of the prosthetic blade <NUM> engages the stop surface <NUM>, the second latch component 78n is received by the recess <NUM>. Specifically, the ball <NUM> engages the engagement blocks <NUM>, thereby causing the engagement blocks <NUM> to move away from one another against the bias of the biasing members <NUM>. The engagement blocks <NUM> may each include a depression <NUM> sized to mate with the outer perimeter of the ball <NUM>. As such, engagement between the engagement blocks <NUM> and the ball <NUM> maintains the second latch component 78n in contact with the first latch component 76n. At this point, a position of the second latch component 78n relative to the first latch component 76n is fixed.

The second latch component 78n may be removed from the first latch component 76n by moving the second latch component 78n-along with the second component <NUM> and sole structure <NUM>—in a direction away from the first latch component 76n to allow engagement blocks <NUM> to disengage the ball <NUM> and be removed from the opening recess <NUM>. Removing the second latch component 78n from the first latch component 76n allows the channel <NUM> to move relative to and along the rail <NUM>. Sufficient movement of the channel <NUM> relative to and along the rail <NUM> allows the channel <NUM> to disengage the rail <NUM>. Once disengaged from the channel <NUM>, the rail <NUM> may be attached to another of the sole structures <NUM>, 30a, 30b, 30c.

The foregoing description has been provided for purposes of illustration and description. Individual elements or features of a particular configuration are generally not limited to that particular configuration, but, where applicable, are interchangeable and can be used in a selected configuration, even if not specifically shown or described.

Claim 1:
An attachment system (<NUM>) for use with a prosthetic device (<NUM>), the attachment system comprising:
a first component (<NUM>) including a first surface, and further including a rail (<NUM>) disposed on an opposite side of the first component than the first surface;
a second component (<NUM>) including a second surface, and further including a channel (<NUM>) formed in a projection (<NUM>) and disposed on an opposite side of the second component (<NUM>) than the second surface, the channel (<NUM>) slidably engaging the rail (<NUM>) to selectively couple the first component (<NUM>) and the second component (<NUM>) together; and
a latch mechanism (<NUM>) operable to fix a relative position between the first component (<NUM>) and the second component (<NUM>),
wherein one of the first surface and the second surface is integral with or operable to be attached to the prosthetic device and the other of the first surface and the second surface is operable to be attached to a sole structure (<NUM>) having a ground-engaging surface (<NUM>),
characterized in that
the latch mechanism (<NUM>) is automatically moved into a latched state to fix the relative position between the first component (<NUM>) and the second component (<NUM>) when the rail (<NUM>) is moved into the channel (<NUM>) a predetermined distance.