Patent Description:
The present disclosure relates to a coupling device, and more particularly to a coupling device with minimized coefficient of friction. The document <CIT> shows a prior art coupling device.

The use of devices for mounting components is well-known. Keyless locking devices (KLDs) are used for mounting together two components, such as a shaft and a machine element. KLDs are frequently used in applications such as: V-belt and conveyor pulleys; sprockets, sheaves, gears, levers, flywheels, agitator shafts, hydraulic clutches, brakes, flange couplings, as well as other applications. KLDs offer many advantages over other devices including increased loading capacity and minimal loss in torque when compared to keyed locking devices. There are a variety of KLDs including single-nut devices as well as multi-screw devices. Generally, keyless locking devices operate using a tapered surface, or wedge principle. Some devices operate via the application of an axial force to engage rings with reciprocal tapers resulting in a wedge action creating a radial force on the tapered rings. A first ring contracts to squeeze the shaft, while the other expands into the bore of the component, or machine element. Alternatively, to eliminate tensile stresses on the mounted component a keyless locking device may be configured to apply an axial force to engage sets of rings with reciprocal tapers; the inner ring creates a radial force on the shaft and the outer tapered rings are drawn together to generate a radial force clamping the component.

One of the difficulties faced with these and related devices is frictional loss between the tapered surfaces. Currently, many devices have tapered surfaces comprising a steel on steel surface. An exemplary steel on steel surface may have a coefficient of friction (CoF) rating of approximately <NUM>.

Accordingly, it is an object of the present invention to provide a coupling device with a reduced CoF. By minimizing the CoF between the tapered surfaces less installation torque is required to achieve the same radial force, or alternatively, an increase in radial forces can be achieved using the same installation torque.

In concordance and agreement with the presently described subject matter, a coupling device with an improved coefficient of friction, has been newly designed. The invention is a device for coupling in accordance with claim <NUM>.

In one embodiment, a device for coupling components, comprises: a first element having at least one inclined surface; and a second element having at least one inclined surface reciprocal to the at least one inclined surface of the first element, wherein an axial movement of at least one of the elements causes a radial force to be applied to at least one of the components.

In some embodiments, the device of claim <NUM>, further comprises a positioning/retaining element configured to cooperate with at least one of the first element and the second element.

In some embodiments, the positioning/retaining element is in threaded engagement with at least one of the first element and the second element.

In some embodiments, the positioning/retaining element is coupled to the second element by an interlock connection.

In some embodiments, the positioning/retaining element is one of a nut, a bolt, a screw, and a mechanical fastener.

In some embodiments, the positioning/retaining element is at least partially received in one of the components.

In some embodiments, the positioning/retaining element is configured to cause the axial movement of the at least one of the first element and the second element.

In some embodiments, the first element includes a first portion and a second portion, wherein at least one of the first portion and the second portion includes the at least one inclined surface.

In some embodiments, the second element includes a first portion and a second portion, wherein at least one of the first portion and the second portion includes the at least one inclined surface.

In some embodiments, at least one of the first element and the second element includes one or more apertures formed therein.

In some embodiments, at least one of the first element and the second element includes one or more dividers formed therein.

In some embodiments, at least one of the first element and the second element is an annular ring.

In some embodiments, a coefficient of friction of the device is about <NUM>.

According to the invention, the device further comprises a liner disposed between the at least one inclined surface of the first element and the at least one inclined surface of the second element.

The following description of technology is merely exemplary in nature of the subject matter, manufacture and use of one or more present disclosures, and is not intended to limit the scope, application, or uses of any specific present disclosure claimed in this application or in such other applications as may be filed claiming priority to this application, or patents issuing therefrom. Regarding methods disclosed, the order of the steps presented is exemplary in nature, and thus, the order of the steps can be different in various embodiments. "A" and "an" as used herein indicate "at least one" of the item is present; a plurality of such items may be present, when possible. Except where otherwise expressly indicated, all numerical quantities in this description are to be understood as modified by the word "about" and all geometric and spatial descriptors are to be understood as modified by the word "substantially" in describing the broadest scope of the technology. "About" when applied to numerical values indicates that the calculation or the measurement allows some slight imprecision in the value (with some approach to exactness in the value; approximately or reasonably close to the value; nearly). If, for some reason, the imprecision provided by "about" and/or "substantially" is not otherwise understood in the art with this ordinary meaning, then "about" and/or "substantially" as used herein indicates at least variations that may arise from ordinary methods of measuring or using such parameters.

Although the open-ended term "comprising," as a synonym of non-restrictive terms such as including, containing, or having, is used herein to describe and claim embodiments of the present technology, embodiments may alternatively be described using more limiting terms such as "consisting of" or "consisting essentially of. " Thus, for any given embodiment reciting materials, components, or process steps, the present technology also specifically includes embodiments consisting of, or consisting essentially of, such materials, components, or process steps excluding additional materials, components or processes (for consisting of) and excluding additional materials, components or processes affecting the significant properties of the embodiment (for consisting essentially of), even though such additional materials, components or processes are not explicitly recited in this application. For example, recitation of a composition or process reciting elements A, B and C specifically envisions embodiments consisting of, and consisting essentially of, A, B and C, excluding an element D that may be recited in the art, even though element D is not explicitly described as being excluded herein.

As referred to herein, all compositional percentages are by weight of the total composition, unless otherwise specified. Disclosures of ranges are, unless specified otherwise, inclusive of endpoints and include all distinct values and further divided ranges within the entire range. Thus, for example, a range of "from A to B" or "from about A to about B" is inclusive of A and of B. Disclosure of values and ranges of values for specific parameters (such as amounts, weight percentages, etc.) are not exclusive of other values and ranges of values useful herein. It is envisioned that two or more specific exemplified values for a given parameter may define endpoints for a range of values that may be claimed for the parameter. For example, if Parameter X is exemplified herein to have value A and also exemplified to have value Z, it is envisioned that Parameter X may have a range of values from about A to about Z. Similarly, it is envisioned that disclosure of two or more ranges of values for a parameter (whether such ranges are nested, overlapping or distinct) subsume all possible combination of ranges for the value that might be claimed using endpoints of the disclosed ranges. For example, if Parameter X is exemplified herein to have values in the range of <NUM>-<NUM>, or <NUM>-<NUM>, or <NUM>-<NUM>, it is also envisioned that Parameter X may have other ranges of values including <NUM>-<NUM>, <NUM>-<NUM>, <NUM>-<NUM>, <NUM>-<NUM>, <NUM>-<NUM>, <NUM>-<NUM>, <NUM>-<NUM>, <NUM>-<NUM>, <NUM>-<NUM>, and so on.

In contrast, when an element is referred to as being "directly on," "directly engaged to," "directly connected to" or "directly coupled to" another element or layer, there may be no intervening elements or layers present.

<FIG> and <FIG> illustrate a coupling device <NUM> according to an embodiment of the present disclosure. The coupling device <NUM> may be employed to couple together a plurality components. In some embodiments, the coupling device <NUM> may be configured to couple stationary components together. For example, the coupling device <NUM> may be employed to couple a first stationary component (e.g., a working component) to a second stationary component (e.g., mounting structure or component). In other embodiments, the coupling device <NUM> may be configured to couple movable components so that the components move together. For example, the coupling device <NUM> may be used to couple rotatable components so that they rotate together. In yet other embodiments, the coupling device <NUM> may be configured to couple one or more moveable components to one or more stationary components. In the exemplary embodiment shown, the coupling device <NUM> may be configured to couple a hub component <NUM> with a shaft component <NUM>. The coupling device <NUM> may be configured to apply a radial force to the shaft component <NUM> as well as configured to apply a radial force to the hub component <NUM> coupling the hub component <NUM> to the shaft component <NUM>.

As best shown in <FIG>, an exemplary embodiment of the coupling device <NUM> comprises an inner element <NUM>, an outer element <NUM>, and a positioning/retaining element <NUM> (e.g., a nut, a bolt, a screw, or any type of mechanical fastener, and the like, etc.). According to the invention, the coupling device <NUM> further comprises a liner <NUM> disposed between the inner element <NUM> and the outer element <NUM>. The inner element <NUM> may comprise a hollow main body having a first end <NUM> and a second end <NUM>. The inner element <NUM> may be configured to at least partially fit within the outer element <NUM>. The inner element <NUM> may include a first portion <NUM> and a second portion <NUM>. A shoulder <NUM> may be formed at a juncture of the first portion <NUM> and the second portion <NUM>. The first portion <NUM> may be configured to cooperate with the positioning/retaining element <NUM> to cause relative movement therebetween and the second portion <NUM> may be configured to cooperate with the outer element <NUM> to couple the components <NUM>, <NUM> together. As depicted, the first portion <NUM> may have a generally uniform outer surface <NUM> having a substantially constant outer diameter and the second portion <NUM> has a generally inclined outer surface <NUM> having an outer diameter that gradually increases from adjacent the first portion <NUM> of the inner element <NUM> to the second end <NUM> thereof. Accordingly, the second portion <NUM> of the inner element <NUM> has a generally frustoconical cross-sectional shape.

In some embodiments, the first portion <NUM> of the inner element <NUM> may include a plurality of external features <NUM> (e.g., threads, teeth, and the like) formed thereon. The external features <NUM> may be configured to cooperate with the positioning/retaining element <NUM> to cause relative movement therebetween. The external features <NUM> may extend from the first end <NUM> of the inner element <NUM> to the shoulder <NUM> thereof. It should be appreciated that various other means and methods of causing relative movement between the inner element <NUM> and the positioning/retaining element <NUM> may be employed if desired.

An inner surface <NUM> of the inner element <NUM> may be configured to engage the shaft component <NUM>. A shape, size, and configuration of the inner surface <NUM> may correspond with an outer surface <NUM> of the shaft component <NUM>. For example, if the shaft component <NUM> has an irregular outer surface <NUM> (e.g., inclined or frustoconical), the inner element <NUM> may have a corresponding irregular inner surface <NUM> (e.g., inclined or frustoconical). In another example, if the shaft component <NUM> is cylindrical, the inner surface <NUM> of the inner element <NUM> may also be cylindrical with an inner diameter corresponding to an outer diameter of the shaft component <NUM>. The inner diameter of the inner element <NUM> may be slightly larger than the outer diameter of the shaft component <NUM> to allow for free sliding movement both axially and radially along the shaft component <NUM> prior to actuation of the coupling device <NUM>.

In certain embodiments, the inner element <NUM> may be configured to engage the shaft component <NUM> by contraction so that the inner element <NUM> grips the shaft component <NUM> via frictional forces. To achieve this, the inner element <NUM> may comprise a plurality of segments <NUM> defined by one or more dividers <NUM> (e.g., slots, grooves, and the like) formed longitudinally or axially in the outer surface <NUM> and/or the outer surface <NUM> and/or the inner surface <NUM> of the inner element <NUM>. The dividers <NUM> are configured to allow radial deflection of the inner element <NUM> as the coupling device <NUM> is engaged and/or disengaged. In certain embodiments, the dividers <NUM> may extend at least partially through only the second portion <NUM> of the inner element <NUM>, thereby the first portion <NUM> remains continuous. A number as well as the length, width, and/or spacing of the dividers <NUM> may be varied to provide a desired flexibility of the inner element <NUM> for a specific application.

As illustrated, the outer element <NUM> may comprise a hollow main body having a first end <NUM> and a second end <NUM>. The outer element <NUM> may be configured to at least partially surround the inner element <NUM>. The outer element <NUM> may include a first portion <NUM> and a second portion <NUM>. A shoulder <NUM> may be formed at a juncture of the first portion <NUM> and the second portion <NUM>. The first portion <NUM> may be configured to cooperate with the positioning/retaining element <NUM> to cause relative movement of the outer element <NUM>, and the second portion <NUM> may be configured to cooperate with the inner element <NUM> to couple the components <NUM>, <NUM> together. As depicted, the first portion <NUM> may have a generally uniform outer surface <NUM> having a substantially constant outer diameter and the second portion <NUM> may also have a generally uniform outer surface <NUM> having an substantially constant outer diameter. In certain instances, the outer diameter of the first portion <NUM> is greater than the outer diameter of the second portion <NUM>, which in turn forms the shoulder <NUM>.

In certain embodiments, the outer element <NUM> may be configured to engage the hub component <NUM> by expansion so that the outer element <NUM> grips the hub component <NUM> via frictional forces. To achieve this, the outer element <NUM> may comprise a plurality of segments <NUM> defined by one or more dividers <NUM> (e.g., slots, grooves, and the like) formed longitudinally or axially in the outer surface <NUM> and/or inner surface <NUM> of the outer element <NUM>. The dividers <NUM> are configured to allow radial deflection of the outer element <NUM> as the coupling device <NUM> is engaged and/or disengaged. The dividers <NUM> may extend at least partially through the first portion <NUM> and/or the second portion <NUM> of the outer element <NUM>. A number as well as the length, width, and/or spacing of the dividers <NUM> may be varied to provide a desired flexibility of the outer element <NUM> for a specific application.

The outer surface <NUM> of the outer element <NUM> may be configured to correspond with an inner surface <NUM> of the hub component <NUM>. For example, if the hub component <NUM> has an irregular inner surface <NUM> (e.g., inclined or frustoconical), the outer element <NUM> may have a corresponding irregular outer surface <NUM> (e.g., inclined or frustoconical). In another example, if the hub component <NUM> is cylindrical, the outer surface <NUM> of the outer element <NUM> may also be cylindrical with an outer diameter corresponding to an inner diameter of the hub component <NUM>. The outer diameter of the outer element <NUM> may be slightly smaller than the inner diameter of the hub component <NUM> to allow for free sliding movement both axially and radially along the hub component <NUM> prior to actuation of the coupling device <NUM>.

As shown, the inner surface <NUM> of the outer element <NUM> may be configured to engage the inner element <NUM>. A shape, size, and configuration of the inner surface <NUM> may correspond with the outer surface <NUM> of the inner element <NUM>. The outer diameter of the inner element <NUM> may be slightly smaller than the inner diameter of the outer element <NUM> to allow for movement of the outer element <NUM> relative to the inner element <NUM> during actuation or engagement of the coupling device <NUM>.

In the embodiment depicted in <FIG> and <FIG>, the inner element <NUM> and outer element <NUM> have reciprocally inclined outer and inner surfaces <NUM>, <NUM>, respectively. The inner and outer elements <NUM>, <NUM> may be configured so that displacement of the outer element <NUM> relative to the inner element <NUM> imparts greater radial force than axial force. Accordingly, the forces created by the reciprocally inclined outer and inner surfaces <NUM>, <NUM> cause greater radial forces than axial forces. Therefore, an engagement (e.g., a rotation in a first direction) of the positioning/retaining element <NUM> causes the inner element <NUM> to be urged radially inward onto the shaft component <NUM> with sufficient force to impede axial displacement of the inner element <NUM> relative to the shaft component <NUM> and the outer element <NUM> to be urged radially outward onto the hub component <NUM> with sufficient force to impede axial displacement of the outer element <NUM> relative to the hub component <NUM>.

As best seen in <FIG>, the outer element <NUM> further includes an interlock <NUM> for connecting the outer element <NUM> with the positioning/retaining element <NUM>. The interlock <NUM> of the outer element <NUM> may be configured to connect the outer element <NUM> to the positioning/retaining element <NUM> so as to allow the positioning/retaining element <NUM> to rotate relative to the outer element <NUM> while substantially impeding axial movement of the outer element <NUM> relative to the positioning/retaining element <NUM>. In some embodiments, the interlock <NUM> may comprise a circumferential flange <NUM> that extends around a circumference of the outer element <NUM>, projecting radially inward. Further, the interlock may comprise a circumferential groove <NUM> that extends around the circumference of the outer element <NUM> adjacent the circumferential flange <NUM>. As illustrated, an outer surface <NUM> of the positioning/retaining element <NUM> may include a circumferential flange <NUM> and a circumferential groove <NUM>. The circumferential flange <NUM> that projects radially outward and extends around the circumference of the positioning/retaining element <NUM> may be configured to be received in the circumferential groove <NUM> of the outer element <NUM>. The circumferential groove <NUM> that extends around the circumference of the positioning/retaining element <NUM> may be configured to receive the circumferential flange <NUM> of the outer element <NUM> therein. It is understood that various other interlocks may be employed as the interlock <NUM>, if desired.

In some embodiments, the positioning/retaining element <NUM> may have an inner diameter that may be larger than the outer diameter of the shaft component <NUM>. Additionally, the outer diameter of the positioning/retaining element <NUM> may be larger than the outer diameter of the inner element <NUM>. As discussed above, the positioning/retaining element <NUM> may be connected to the outer element <NUM> in a manner that substantially impedes axial displacement of the inner element <NUM> relative to the positioning/retaining element <NUM>. In certain instances, an inner surface <NUM> of the positioning/retaining element <NUM> may include a plurality of internal features <NUM> (e.g., threads, teeth, and the like) formed thereon. The internal features <NUM> of the positioning/retaining element <NUM> may be configured to cooperate with the external features <NUM> of the inner element <NUM> to cause relative movement therebetween. The internal features <NUM> may extend from a first end <NUM> of the positioning/retaining element <NUM> to ta second end <NUM> thereof.

As more clearly shown in the embodiment of <FIG>, the coupling device <NUM> further includes a liner <NUM> for minimizing friction between the outer surface <NUM> of the inner element <NUM> and the inner surface <NUM> of the outer element <NUM>. The liner <NUM> is produced from an anti-friction fabric. In some embodiments, the liner <NUM> may be directly applied to the inner surface <NUM> of the outer element <NUM>. Additionally, or alternatively, the liner <NUM> may directly applied to the outer surface <NUM> of the inner element <NUM>. In some embodiments, the liner <NUM> may be produced from a woven material coated with a reinforcing thermoset resin. The woven material may include PTFE fibers, aramid fiber, carbon fiber, other comparable fibers, and combinations thereof. In some embodiments, the liner <NUM> may further comprise an additional performance coating comprised of PTFE. In some embodiments, the liner <NUM> may further include a resin layer for self-lubrication. The resin layer may comprise PTFE. In some embodiments, the liner <NUM> may be a Fenlon™ liner fabric such as Fenlon™ Asta, or Fenlon™ Low Friction Solid Lubricants.

The various embodiments of the liner <NUM> described herein are configured to reduce a coefficient of friction (CoF) between the outer surface <NUM> of the inner element <NUM> and the inner surface <NUM> of the outer element <NUM> of the coupling device <NUM>. Minimizing a frictional loss between the surfaces <NUM>, <NUM> results in a generation of increased radial forces. Minimizing the frictional loss results in the coupling device <NUM> being easier to install, requiring less torque and/or less time. Additionally, the reduction in frictional loss in the coupling device <NUM> increases a performance thereof.

In some embodiments, the coupling device <NUM> may further comprise an additional spacer or sleeve configured to cooperate with the outer surface <NUM> of the outer element <NUM>. In some embodiments, the spacer or sleeve may be the positioning sleeve described in <CIT>.

To engage the coupling device <NUM> and couple the components <NUM>, <NUM>, the positioning/retaining element <NUM> is rotated in the first direction causing relative movement between the positioning/retaining element <NUM> and the inner element <NUM> via cooperation of the features <NUM>, <NUM> and applying an axial force on the outer element <NUM> via the interlock <NUM>. The reciprocal inclined surfaces <NUM>, <NUM> of the inner and outer elements <NUM>, <NUM>, respectively, result in opposing radial forces. In particular, the inner element <NUM> contracts to apply a radially inward force on the shaft component <NUM> and the outer element <NUM> expands to apply a radially outward force on the hub component <NUM>, thereby coupling the components <NUM>, <NUM> together. As depicted, the interlock <NUM> cooperates with the positioning/retaining element <NUM> to connect the outer element <NUM> to the positioning/retaining element <NUM> so as to allow the positioning/retaining element <NUM> to rotate relative to the outer element <NUM> and relative axial movement between the inner element <NUM> and the outer element <NUM>, while substantially impeding axial movement of the outer element <NUM> relative to the positioning/retaining element <NUM>.

To disengage the coupling device <NUM> and decouple the components <NUM>, <NUM>, the positioning/retaining element <NUM> is rotated in an opposite second direction causing relative movement between the positioning/retaining element <NUM> and the inner element <NUM> via cooperation of the features <NUM>, <NUM> and releasing both the axial force on the outer element <NUM> via the interlock <NUM> and the opposing radial forces caused by the reciprocal inclined surfaces <NUM>, <NUM> of the inner and outer elements <NUM>, <NUM>, respectively.

Referring to <FIG> and <FIG>, a coupling device <NUM> according to another embodiment of the present disclosure is illustrated. The coupling device <NUM> may be employed to couple together a plurality components. In some embodiments, the coupling device <NUM> may be configured to couple stationary components together. For example, the coupling device <NUM> may be employed to couple a first stationary component (e.g., a working component) to a second stationary component (e.g., mounting structure or component). In other embodiments, the coupling device <NUM> may be configured to couple movable components so that the components move together. For example, the coupling device <NUM> may be used to couple rotatable components so that they rotate together. In yet other embodiments, the coupling device <NUM> may be configured to couple one or more moveable components to one or more stationary components. In the exemplary embodiment shown, the coupling device <NUM> may be configured to couple a hub component <NUM> with a shaft component <NUM>. The coupling device <NUM> may be configured to apply a radial force to the shaft component <NUM> as well as configured to apply a radial force to the hub component <NUM> coupling the hub component <NUM> to the shaft component <NUM>.

As best shown in <FIG>, an exemplary embodiment of the coupling device <NUM> comprises an inner element <NUM>, an outer element <NUM>, and one or more positioning/retaining elements <NUM> (e.g., a nut, a bolt, a screw, or any type of mechanical fastener, and the like, etc.). The inner element <NUM> may be configured to at least partially fit within the outer element <NUM>. According to the invention, the coupling device <NUM> further comprises a liner <NUM> disposed between the inner element <NUM> and the outer element <NUM>. The inner element <NUM> may have a first end <NUM> and a second end <NUM>. In some embodiments, the inner element <NUM> may comprise a sleeve portion <NUM> provided with a radially outward extending flange portion <NUM>. As depicted, the cylindrical sleeve <NUM> has a generally inclined outer surface <NUM> having an outer diameter that gradually decreases from adjacent the flange portion <NUM> of the inner element <NUM> to the second end <NUM> thereof. Accordingly, the sleeve portion <NUM> of the inner element <NUM> has a generally frustoconical cross-sectional shape. As illustrated, the flange portion <NUM> may include one or more apertures <NUM> formed therein. Each of the apertures <NUM> may be configured to receive a respective one of the positioning/retaining elements <NUM> therein. It is understood that more or less apertures <NUM> than shown may be formed in the flange portion <NUM> as desired.

An inner surface <NUM> of the inner element <NUM> may be configured to engage the shaft component <NUM>. A shape, size, and configuration of the inner surface <NUM> may correspond with an outer surface <NUM> of the shaft component <NUM>. For example, if the shaft component <NUM> has an irregular outer surface <NUM> (e.g., inclined or frustoconical), the inner element <NUM> may have a corresponding irregular inner surface <NUM> (e.g., inclined or frustoconical). In another example, if the shaft component <NUM> is cylindrical, the inner surface <NUM> of the inner element <NUM> may also be cylindrical with an inner diameter corresponding to an outer diameter of the shaft component <NUM>. The inner diameter of the inner element <NUM> may be slightly larger than the outer diameter of the shaft component <NUM> to allow for free sliding movement both axially and radially along the shaft component <NUM> prior to actuation or engagement of the coupling device <NUM>.

In certain embodiments, the inner element <NUM> may be configured to engage the shaft component <NUM> by contraction so that the inner element <NUM> grips the shaft component <NUM> via frictional forces. To achieve this, the inner element <NUM> may comprise a plurality of segments (not depicted) defined by one or more dividers (e.g., slots, grooves, and the like) formed longitudinally or axially in the inner surface <NUM> and/or the outer surface <NUM> of the inner element <NUM>. The dividers are configured to allow radial deflection of the inner element <NUM> as the coupling device <NUM> is engaged and/or disengaged. In certain embodiments, the dividers may extend at least partially through the inner element <NUM>. A number as well as the length, width, and/or spacing of the dividers may be varied to provide a desired flexibility of the inner element <NUM> for a specific application.

As illustrated, the outer element <NUM> may comprise a main body having a first end <NUM> and a second end <NUM>. In some embodiments, the outer element <NUM> may be an annular ring. The outer element <NUM> may be configured to at least partially surround the inner element <NUM>. The outer element <NUM> may include one or more apertures <NUM> formed therein. In some instances, the apertures <NUM> are formed in a radial array configuration. Each of the apertures <NUM> may be configured to receive a respective one of the positioning/retaining elements <NUM> therein.

In some embodiments, an inner surface <NUM> of the apertures <NUM> may include a plurality of internal features (e.g., threads, teeth, and the like) formed thereon. The internal features may be configured to cooperate with the positioning/retaining element <NUM> to cause relative movement therebetween and/or relative movement between the inner and outer elements <NUM>, <NUM> to couple the components <NUM>, <NUM> together. The internal features may extend from the first end <NUM> of the outer element <NUM> to the second end <NUM> thereof. It should be appreciated that various other means and methods of causing relative movement between the elements <NUM>, <NUM> and/or the positioning/retaining element <NUM> may be employed if desired.

In certain embodiments, the outer element <NUM> may be configured to engage the hub component <NUM> by expansion so that the outer element <NUM> grips the hub component <NUM> via frictional forces. To achieve this, the outer element <NUM> may comprise one or more segments <NUM> defined by one or more dividers <NUM> (e.g., slots, grooves, and the like) formed longitudinally or axially in an outer surface <NUM> and/or an inner surface <NUM> of the outer element <NUM>. The dividers <NUM> are configured to allow radial deflection of the outer element <NUM> as the coupling device <NUM> is engaged and/or disengaged. The dividers <NUM> may extend at least partially through the outer element <NUM>. A number as well as the length, width, and/or spacing of the dividers <NUM> may be varied to provide a desired flexibility of the outer element <NUM> for a specific application.

The outer surface <NUM> of the outer element <NUM> may be configured to correspond with an inner surface <NUM> of the hub component <NUM>. For example, if the hub component <NUM> has an irregular inner surface <NUM> (e.g., inclined or frustoconical), the outer element <NUM> may have a corresponding irregular outer surface <NUM> (e.g., inclined or frustoconical). In another example, if the hub component <NUM> is cylindrical, the outer surface <NUM> of the outer element <NUM> may also be cylindrical with an outer diameter corresponding to an inner diameter of the hub component <NUM>. The outer diameter of the outer element <NUM> may be slightly smaller than the inner diameter of the hub component <NUM> to allow for free sliding movement both axially and radially along the hub component <NUM> prior to actuation or engagement of the coupling device <NUM>.

The inner surface <NUM> of the outer element <NUM> may be configured to engage the inner element <NUM>. As depicted, the outer element <NUM> has a generally inclined outer surface <NUM> having an inner diameter that gradually decreases from a first end <NUM> of the outer element <NUM> to the second end <NUM> thereof. Accordingly, the outer element <NUM> has a generally frustoconical cross-sectional shape. A shape, size, and configuration of the inner surface <NUM> may correspond with the outer surface <NUM> of the inner element <NUM>. The outer diameter of the inner element <NUM> may be slightly smaller than the inner diameter of the outer element <NUM> to allow for movement of the outer element <NUM> relative to the inner element <NUM> during actuation or engagement of the coupling device <NUM>.

In the embodiment depicted in <FIG> and <FIG>, the inner element <NUM> and outer element <NUM> have reciprocally inclined outer and inner surfaces <NUM>, <NUM>, respectively. The inner and outer elements <NUM>, <NUM> may be configured so that displacement of the outer element <NUM> relative to the inner element <NUM> imparts greater radial force than axial force. Accordingly, the forces created by the reciprocally inclined outer and inner surfaces <NUM>, <NUM> cause greater radial forces than axial forces. Therefore, an engagement (e.g., a rotation in a first direction) of the positioning/retaining elements <NUM> causes the inner element <NUM> to be urged radially inward onto the shaft component <NUM> with sufficient force to impede axial displacement of the inner element <NUM> relative to the shaft component <NUM> and the outer element <NUM> to be urged radially outward onto the hub component <NUM> with sufficient force to impede axial displacement of the outer element <NUM> relative to the hub component <NUM>.

As discussed above, the portioning/retaining element <NUM> may be connected to the outer element <NUM> in a manner that substantially impedes axial displacement of the inner element <NUM> relative to the positioning/retaining element <NUM>. In certain instances, each of the positioning/retaining elements <NUM> may include a plurality of external features (e.g., threads, teeth, and the like) formed thereon. The external features of the portioning/retaining element <NUM> may be configured to cooperate with the internal features of the outer element <NUM> to cause relative movement therebetween and/or between the outer element <NUM> and the inner element <NUM>.

To engage the coupling device <NUM> and couple the components <NUM>, <NUM>, the positioning/retaining elements <NUM> are rotated in the first direction causing relative movement between the positioning/retaining element <NUM> and the outer element <NUM> via cooperation of the external and internal features thereof and applying an axial force on the inner element <NUM>. The reciprocal inclined surfaces <NUM>, <NUM> of the inner and outer elements <NUM>, <NUM>, respectively, result in opposing radial forces. In particular, the inner element <NUM> contracts to apply a radially inward force on the shaft component <NUM> and the outer element <NUM> expands to apply a radially outward force on the hub component <NUM>, thereby coupling the components <NUM>, <NUM> together.

To disengage the coupling device <NUM> and decouple the components <NUM>, <NUM>, the positioning/retaining elements <NUM> are rotated in an opposite second direction causing relative movement between the positioning/retaining element <NUM> and the outer element <NUM> via cooperation of the external and internal features thereof and releasing both the axial force on the inner element <NUM> and the opposing radial forces caused by the reciprocal inclined surfaces <NUM>, <NUM> of the inner and outer elements <NUM>, <NUM>, respectively.

As best shown in <FIG>, an exemplary embodiment of the coupling device <NUM> comprises an inner element <NUM>, an outer element <NUM>, and one or more positioning/retaining elements <NUM> (e.g., a nut, a bolt, a screw, or any type of mechanical fastener, and the like, etc.). The inner element <NUM> may be configured to at least partially fit within the outer element <NUM>. The coupling device <NUM> further comprises a liner <NUM> disposed between the inner element <NUM> and the outer element <NUM>. The inner element <NUM> comprises a first portion <NUM> and a second portion <NUM>. As depicted, each of the portions <NUM>, <NUM> has a generally inclined outer surface <NUM>, <NUM>, respectively, having an outer diameter that gradually decreases from outer faces <NUM>, <NUM> of the portions <NUM>, <NUM> to respective inner faces <NUM>, <NUM> thereof. Accordingly, each of the portions <NUM>, <NUM> of the inner element <NUM> has a generally frustoconical cross-sectional shape. In some embodiments, each of the portions <NUM>, <NUM> may be an annular ring.

As illustrated, the portions <NUM>, <NUM> may each include one or more apertures <NUM> formed therein. In some instances, the apertures <NUM> are formed in a radial array configuration. Each of the apertures <NUM> may be configured to receive a respective one of the positioning/retaining elements <NUM> therein. It is understood that more or less apertures <NUM> than shown may be formed in the portions <NUM>, <NUM> as desired.

In some embodiments, an inner surface <NUM> of the apertures <NUM> may include a plurality of internal features (e.g., threads, teeth, and the like) formed thereon. The internal features may be configured to cooperate with the positioning/retaining element <NUM> to cause relative movement therebetween and/or relative movement between the inner and outer elements <NUM>, <NUM> to couple the components <NUM>, <NUM> together. It should be appreciated that various other means and methods of causing relative movement between the elements <NUM>, <NUM> and/or the positioning/retaining element <NUM> may be employed if desired.

Inner surfaces <NUM>, <NUM> of the portions <NUM>, <NUM>, respectively, may be configured to engage the shaft component <NUM>. A shape, size, and configuration of the inner surfaces <NUM>, <NUM> may correspond with an outer surface <NUM> of the shaft component <NUM>. For example, if the shaft component <NUM> has an irregular outer surface <NUM> (e.g., inclined or frustoconical), at least one of the portions <NUM>, <NUM> may have a corresponding irregular inner surface <NUM>, <NUM> (e.g., inclined or frustoconical). In another example, if the shaft component <NUM> is cylindrical, the inner surfaces <NUM>, <NUM> of the portions <NUM>, <NUM> may also be cylindrical with inner diameters corresponding to an outer diameter of the shaft component <NUM>. The inner diameters of the portions <NUM>, <NUM> may be slightly larger than the outer diameter of the shaft component <NUM> to allow for free sliding movement both axially and radially along the shaft component <NUM> prior to actuation or engagement of the coupling device <NUM>.

In certain embodiments, the portions <NUM>, <NUM> of the inner element <NUM> may be configured to engage the shaft component <NUM> by contraction so that the portions <NUM>, <NUM> grip the shaft component <NUM> via frictional forces. To achieve this, at least one of the portions <NUM>, <NUM> of the inner element <NUM> may comprise a plurality of segments defined by one or more dividers <NUM> (e.g., slots, grooves, and the like) formed axially in the inner surfaces <NUM>, <NUM> and/or the outer surfaces <NUM>, <NUM> of the portions <NUM>, <NUM>. The dividers <NUM> are configured to allow radial deflection of the inner element <NUM> as the coupling device <NUM> is engaged and/or disengaged. In certain embodiments, the dividers <NUM> may extend at least partially through the inner element <NUM>. A number as well as the length, width, and/or spacing of the dividers <NUM> may be varied to provide a desired flexibility of the inner element <NUM> for a specific application.

As illustrated, the outer element <NUM> comprises a first portion <NUM> and a second portion <NUM>. Each of the portions <NUM>, <NUM> has a generally inclined inner surface <NUM>, <NUM>, respectively, having an inner diameter that gradually decreases from outer faces <NUM>, <NUM> of the portions <NUM>, <NUM> to respective inner faces <NUM>, <NUM> thereof. Accordingly, each of the portions <NUM>, <NUM> of the outer element <NUM> has a generally frustoconical cross-sectional shape. In some embodiments, each of the portions <NUM>, <NUM> may be an annular ring.

In certain embodiments, the portions <NUM>, <NUM> of the outer element <NUM> may be configured to engage the hub component <NUM> by expansion so that the outer element <NUM> grips the hub component <NUM> via frictional forces. To achieve this, one or more of the portions <NUM>, <NUM> of the outer element <NUM> may comprise one or more segments defined by one or more dividers (e.g., slots, grooves, and the like) formed longitudinally or axially in respective outer surfaces <NUM>, <NUM> and/or inner surfaces <NUM>, <NUM> of the portions <NUM>, <NUM> of the outer element <NUM>. The dividers are configured to allow radial deflection of the outer element <NUM> as the coupling device <NUM> is engaged and/or disengaged. The dividers may extend at least partially through the outer element <NUM>. A number as well as the length, width, and/or spacing of the dividers may be varied to provide a desired flexibility of the outer element <NUM> for a specific application.

Engaging surfaces <NUM>, <NUM> of the portions <NUM>, <NUM> of the outer element <NUM> may be configured to correspond with an engaging surface <NUM> of the hub component <NUM>. For example, if the hub component <NUM> has an irregular engaging surface <NUM> (e.g., inclined or frustoconical), the outer element <NUM> may have at least one corresponding irregular engaging surface <NUM>, <NUM> (e.g., inclined or frustoconical). In another example, if the hub component <NUM> is cylindrical, at least one of the engaging surfaces <NUM>, <NUM> of the respective portions <NUM>, <NUM> of the outer element <NUM> may also be cylindrical. The diameter of the engaging surfaces <NUM>, <NUM> of the portions <NUM>, <NUM> may be slightly larger than the outer diameter of the hub component <NUM> to allow for free sliding movement along the hub component <NUM> prior to actuation or engagement of the coupling device <NUM>.

Each of the inner surfaces <NUM>, <NUM> of the portions <NUM>, <NUM> of the outer element <NUM> may be configured to engage the inner element <NUM>. A shape, size, and configuration of the inner surfaces <NUM>, <NUM> may correspond with the respective outer surfaces <NUM>, <NUM> of the portions <NUM>, <NUM> of the inner element <NUM>. The outer diameter of the inner element <NUM> may be slightly smaller than the inner diameter of the outer element <NUM> to allow for movement of the outer element <NUM> relative to the inner element <NUM> during actuation or engagement of the coupling device <NUM>.

In the embodiment depicted in <FIG> and <FIG>, the portions <NUM>, <NUM> of the inner element <NUM> and the portions <NUM>, <NUM> of the outer element <NUM> have reciprocally inclined outer surfaces <NUM>, <NUM> and inner surfaces <NUM>, <NUM>, respectively. The inner and outer elements <NUM>, <NUM> may be configured so that displacement of the outer element <NUM> relative to the inner element <NUM> imparts greater radial force than axial force. Accordingly, the forces created by the reciprocally inclined surfaces <NUM>, <NUM>, <NUM>, <NUM> cause greater radial forces than axial forces. Therefore, an engagement (e.g., a rotation in a first direction) of the positioning/retaining elements <NUM> causes the inner element <NUM> to be urged radially inward onto the shaft component <NUM> with sufficient force to impede axial displacement of the inner element <NUM> relative to the shaft component <NUM> and the outer element <NUM> to be urged radially outward onto the hub component <NUM> with sufficient force to impede axial displacement of the outer element <NUM> relative to the hub component <NUM>.

As discussed above, the portioning/retaining elements <NUM> may be connected to the inner element <NUM>. In certain instances, each of the positioning/retaining elements <NUM> may include a plurality of external features (e.g., threads, teeth, and the like) formed thereon. The external features of the portioning/retaining element <NUM> may be configured to cooperate with the internal features of the inner element <NUM> to cause relative movement therebetween and/or between the portions <NUM>, <NUM> of the outer element <NUM> and the portions <NUM>, <NUM> of the inner element <NUM>.

As more clearly shown in the embodiment of <FIG>, the coupling device <NUM> further includes a liner <NUM> for minimizing friction between the outer surfaces <NUM>, <NUM> of the portions <NUM>, <NUM> of the inner element <NUM> and the inner surfaces <NUM>, <NUM> of the portions <NUM>, <NUM> of the outer element <NUM>. In some embodiments, the liner <NUM> may comprise a first portion <NUM> and a second portion <NUM>. The first portion <NUM> disposed between the surfaces <NUM>, <NUM> and the second portion <NUM> disposed between the surfaces <NUM>, <NUM>. One or more of the portions <NUM>, <NUM> of the liner <NUM> are produced from an anti-friction fabric. In some embodiments, one or more of the portions <NUM>, <NUM> of the liner <NUM> may be directly applied to the inner surfaces <NUM>, <NUM> of the outer element <NUM>. Additionally, or alternatively, one or more of the portions <NUM>, <NUM> of the liner <NUM> may directly applied to the outer surfaces <NUM>, <NUM> of the inner element <NUM>. In some embodiments, one or more of the portions <NUM>, <NUM> of the liner <NUM> may be produced from a woven material coated with a reinforcing thermoset resin. The woven material may include PTFE fibers, aramid fiber, carbon fiber, other comparable fibers, and combinations thereof. In some embodiments, one or more of the portions <NUM>, <NUM> of the liner <NUM> may further comprise an additional performance coating comprised of PTFE. In some embodiments, one or more of the portions <NUM>, <NUM> of the liner <NUM> may further include a resin layer for self-lubrication. The resin layer may comprise PTFE. In some embodiments, one or more of the portions <NUM>, <NUM> of the liner <NUM> may be a Fenlon™ liner fabric such as Fenlon™ Asta, or Fenlon™ Low Friction Solid Lubricants.

The various embodiments of the liner <NUM> described herein are configured to reduce a coefficient of friction (CoF) between the outer surfaces <NUM>, <NUM> of the inner element <NUM> and the inner surfaces <NUM>, <NUM> of the outer element <NUM> of the coupling device <NUM>. Minimizing a frictional loss between the surfaces <NUM>, <NUM>, <NUM>, <NUM> results in a generation of increased radial forces. Minimizing the frictional loss results in the coupling device <NUM> being easier to install, requiring less torque and/or less time. Additionally, the reduction in frictional loss in the coupling device <NUM> increases a performance thereof.

To engage the coupling device <NUM> and couple the components <NUM>, <NUM>, the positioning/retaining elements <NUM> are rotated in the first direction causing relative movement between the positioning/retaining element <NUM> and the portions <NUM>, <NUM> of the inner element <NUM> via cooperation of the external and internal features thereof and applying an axial force on the inner element <NUM>. In some instances, the portions <NUM>, <NUM> of the inner element <NUM> are drawn closer together as the positioning/retaining elements <NUM> are rotated in the first direction. The reciprocal inclined surfaces <NUM>, <NUM>, <NUM>, <NUM> of the inner and outer elements <NUM>, <NUM>, respectively, result in opposing radial forces. In particular, the portions <NUM>, <NUM> of the inner element <NUM> contract to apply a radially inward force on the shaft component <NUM> and the portions <NUM>, <NUM> of the outer element <NUM> expand so that the engaging surface <NUM>, <NUM> thereof apply a clamping force on the hub component <NUM>, thereby coupling the components <NUM>, <NUM> together.

To disengage the coupling device <NUM> and decouple the components <NUM>, <NUM>, the positioning/retaining elements <NUM> are rotated in an opposite second direction causing relative movement between the positioning/retaining element <NUM> and the portions <NUM>, <NUM> of the inner element <NUM> via cooperation of the external and internal features thereof and releasing both the axial force on the portions <NUM>, <NUM> of the inner element <NUM> and the opposing radial forces caused by the reciprocal inclined surfaces <NUM>, <NUM>, <NUM>, <NUM> of the inner and outer elements <NUM>, <NUM>, respectively.

Turning now to <FIG>, a coupling device <NUM> according to another embodiment of the present disclosure is illustrated. The coupling device <NUM> may be employed to couple together a plurality components. In some embodiments, the coupling device <NUM> may be configured to couple stationary components together. For example, the coupling device <NUM> may be employed to couple a first stationary component (e.g., a working component) to a second stationary component (e.g., mounting structure or component). In other embodiments, the coupling device <NUM> may be configured to couple movable components so that the components move together. For example, the coupling device <NUM> may be used to couple rotatable components so that they rotate together. In yet other embodiments, the coupling device <NUM> may be configured to couple one or more moveable components to one or more stationary components. In the exemplary embodiment shown, the coupling device <NUM> may be configured to couple a hub component <NUM> with a shaft component <NUM>. The coupling device <NUM> may be configured to apply a radial force to the hub component <NUM> and/or the shaft component <NUM> coupling the hub component <NUM> to the shaft component <NUM>.

An exemplary embodiment of the coupling device <NUM> comprises an inner element <NUM>, an outer element <NUM>, and one or more positioning/retaining elements <NUM> (e.g., a nut, a bolt, a screw, or any type of mechanical fastener, and the like, etc.). The inner element <NUM> may be configured to at least partially fit within the outer element <NUM>. The coupling device <NUM> further comprises a liner <NUM> disposed between the inner element <NUM> and the outer element <NUM>. The inner element <NUM> has generally inclined outer surface <NUM>, <NUM> that form an apex <NUM>. An outer diameter of the inner element <NUM> gradually increases from outer faces <NUM>, <NUM> of the inner element <NUM> to the apex <NUM> thereof. In some embodiments, the inner element <NUM> may be an annular ring.

An inner surface <NUM> of the inner element <NUM> may be configured to engage the hub component <NUM>. A shape, size, and configuration of the inner surface <NUM> may correspond with an outer surface <NUM> of the hub component <NUM>. For example, if the hub component <NUM> has an irregular outer surface <NUM> (e.g., inclined or frustoconical), the inner element <NUM> may have a corresponding irregular inner surface <NUM> (e.g., inclined or frustoconical). In another example, if the hub component <NUM> is cylindrical, the inner surface <NUM> of the inner element <NUM> may also be cylindrical with an inner diameter corresponding to an outer diameter of the hub component <NUM>. The inner diameter of the inner element <NUM> may be slightly larger than the outer diameter of the hub component <NUM> to allow for free sliding movement both axially and radially along the hub component <NUM> prior to actuation or engagement of the coupling device <NUM>.

In certain embodiments, the inner element <NUM> may be configured to engage the hub component <NUM> by contraction so that the inner element <NUM> grips the hub component <NUM> via frictional forces. To achieve this, the inner element <NUM> may comprise a plurality of segments defined by one or more dividers (e.g., slots, grooves, and the like) formed axially in the inner surface <NUM> and/or the outer surfaces <NUM>, <NUM>. The dividers may be configured to allow radial deflection of the inner element <NUM> as the coupling device <NUM> is engaged and/or disengaged. In certain embodiments, the dividers may extend at least partially through the inner element <NUM>. A number as well as the length, width, and/or spacing of the dividers may be varied to provide a desired flexibility of the inner element <NUM> for a specific application.

As illustrated, the outer element <NUM> comprises a first portion <NUM> and a second portion <NUM>. Each of the portions <NUM>, <NUM> has a generally inclined inner surface <NUM>, <NUM>, respectively, having an inner diameter that gradually increases from outer faces <NUM>, <NUM> of the portions <NUM>, <NUM> to respective inner faces <NUM>, <NUM> thereof. In some embodiments, each of the portions <NUM>, <NUM> may be an annular ring.

In certain embodiments, the portions <NUM>, <NUM> of the outer element <NUM> may be configured to engage the inner element <NUM> by contraction so that the outer element <NUM> grips the inner element <NUM> via frictional forces. To achieve this, one or more of the portions <NUM>, <NUM> of the outer element <NUM> may comprise one or more segments defined by one or more dividers (e.g., slots, grooves, and the like) formed longitudinally or axially in respective outer surfaces <NUM>, <NUM> and/or inner surfaces <NUM>, <NUM> of the portions <NUM>, <NUM> of the outer element <NUM>. The dividers may be configured to allow radial deflection of the outer element <NUM> as the coupling device <NUM> is engaged and/or disengaged. The dividers may extend at least partially through the outer element <NUM>. A number as well as the length, width, and/or spacing of the dividers may be varied to provide a desired flexibility of the outer element <NUM> for a specific application.

Each of the inner surfaces <NUM>, <NUM> of the portions <NUM>, <NUM> of the outer element <NUM> may be configured to engage the inner element <NUM>. A shape, size, and configuration of the inner surfaces <NUM>, <NUM> may correspond with the respective outer surfaces <NUM>, <NUM> of the inner element <NUM>. The outer diameter of the inner element <NUM> may be slightly smaller than the inner diameter of the outer element <NUM> to allow for movement of the outer element <NUM> relative to the inner element <NUM> during actuation or engagement of the coupling device <NUM>.

In the embodiment depicted in <FIG>, the inner element <NUM> and the portions <NUM>, <NUM> of the outer element <NUM> have reciprocally inclined outer surfaces <NUM>, <NUM> and inner surfaces <NUM>, <NUM>, respectively. The inner and outer elements <NUM>, <NUM> may be configured so that displacement of the outer element <NUM> relative to the inner element <NUM> imparts greater radial force than axial force. Accordingly, the forces created by the reciprocally inclined surfaces <NUM>, <NUM>, <NUM>, <NUM> cause greater radial forces than axial forces. Therefore, an engagement (e.g., a rotation in a first direction) of the positioning/retaining elements <NUM> causes the inner element <NUM> to be urged radially inward onto the hub component <NUM> with sufficient force to impede axial displacement of the inner element <NUM> relative to the hub component <NUM> and the hub component <NUM> to be urged radially inward onto the shaft component <NUM> with sufficient force to impede axial displacement of the hub component <NUM> relative to the shaft component <NUM>.

As discussed above, the positioning/retaining elements <NUM> may be connected to the outer element <NUM>. In certain instances, each of the positioning/retaining elements <NUM> may include a plurality of external features (e.g., threads, teeth, and the like) formed thereon. The external features of the portioning/retaining <NUM> may be configured to cooperate with the internal features of the apertures <NUM> of the outer element <NUM> to cause relative movement therebetween and/or between the portions <NUM>, <NUM> of the outer element <NUM> and the inner element <NUM>.

The coupling device <NUM> further includes a liner <NUM> for minimizing friction between the outer surfaces <NUM>, <NUM> of the inner element <NUM> and the inner surfaces <NUM>, <NUM> of the portions <NUM>, <NUM> of the outer element <NUM>. In some embodiments, the liner <NUM> may be a single unitary structure or be comprised of a plurality of separate portions. The liner <NUM> is produced from an anti-friction fabric. In some embodiments, the liner <NUM> may be directly applied to the inner surfaces <NUM>, <NUM> of the outer element <NUM>. Additionally, or alternatively, the liner <NUM> may directly applied to the outer surfaces <NUM>, <NUM> of the inner element <NUM>. In some embodiments, the liner <NUM> may be produced from a woven material coated with a reinforcing thermoset resin. The woven material may include PTFE fibers, aramid fiber, carbon fiber, other comparable fibers, and combinations thereof. In some embodiments, the liner <NUM> may further comprise an additional performance coating comprised of PTFE. In some embodiments, the liner <NUM> may further include a resin layer for self-lubrication. The resin layer may comprise PTFE. In some embodiments, the liner <NUM> may be a Fenlon™ liner fabric such as Fenlon™ Asta, or Fenlon™ Low Friction Solid Lubricants.

To engage the coupling device <NUM> and couple the components <NUM>, <NUM>, the positioning/retaining elements <NUM> are rotated in the first direction causing relative movement between the positioning/retaining element <NUM> and the portions <NUM>, <NUM> of the outer element <NUM> via cooperation of the external and internal features thereof and applying an axial force on the outer element <NUM>. In some instances, the portions <NUM>, <NUM> of the outer element <NUM> are drawn closer together causing a compression of the inner element <NUM>. The reciprocal inclined surfaces <NUM>, <NUM>, <NUM>, <NUM> of the inner and outer elements <NUM>, <NUM>, respectively, result in an inward radial force. In particular, the portions <NUM>, <NUM> of the inner element <NUM> contract to apply a radially inward force on the hub component <NUM> and the shaft component <NUM>, thereby coupling the components <NUM>, <NUM> together.

To disengage the coupling device <NUM> and decouple the components <NUM>, <NUM>, the positioning/retaining elements <NUM> are rotated in an opposite second direction causing relative movement between the positioning/retaining element <NUM> and the portions <NUM>, <NUM> of the outer element <NUM> via cooperation of the external and internal features thereof and releasing both the axial force on the portions <NUM>, <NUM> of the outer element <NUM> and the inward radial force caused by the reciprocal inclined surfaces <NUM>, <NUM>, <NUM>, <NUM> of the inner and outer elements <NUM>, <NUM>, respectively.

<FIG> illustrates a coupling device <NUM> according to another embodiment of the present disclosure is illustrated. The coupling device <NUM> may be employed to couple together a plurality components. In some embodiments, the coupling device <NUM> may be configured to couple stationary components together. For example, the coupling device <NUM> may be employed to couple a first stationary component (e.g., a working component) to a second stationary component (e.g., mounting structure or component). In other embodiments, the coupling device <NUM> may be configured to couple movable components so that the components move together. For example, the coupling device <NUM> may be used to couple rotatable components so that they rotate together. In yet other embodiments, the coupling device <NUM> may be configured to couple one or more moveable components to one or more stationary components. In the exemplary embodiment shown, the coupling device <NUM> may be configured to couple a hub component <NUM> with a shaft component <NUM>. The coupling device <NUM> may be configured to apply a radial force to the hub component <NUM> and/or the shaft component <NUM> coupling the hub component <NUM> to the shaft component <NUM>.

An exemplary embodiment of the coupling device <NUM> comprises an inner element <NUM>, an outer element <NUM>, and one or more positioning/retaining elements <NUM> (e.g., a nut, a bolt, a screw, or any type of mechanical fastener, and the like, etc.). The inner element <NUM> may be configured to at least partially fit within the outer element <NUM>. The coupling device <NUM> further comprises a liner <NUM> disposed between the inner element <NUM> and the outer element <NUM>. The inner element <NUM> may comprise a first portion <NUM> and a second portion <NUM>. As depicted, each of the portions <NUM>, <NUM> has a generally inclined outer surface <NUM>, <NUM>, respectively, having an outer diameter that gradually increases from outer faces <NUM>, <NUM> of the portions <NUM>, <NUM> to respective inner faces <NUM>, <NUM> thereof. Accordingly, each of the portions <NUM>, <NUM> of the inner element <NUM> has a generally frustoconical cross-sectional shape. In some embodiments, each of the portions <NUM>, <NUM> may be an annular ring.

Inner surfaces <NUM>, <NUM> of the portions <NUM>, <NUM>, respectively, may be configured to engage the hub component <NUM>. A shape, size, and configuration of the inner surfaces <NUM>, <NUM> may correspond with an outer surface <NUM> of the hub component <NUM>. The inner diameters of the portions <NUM>, <NUM> may be slightly larger than the outer diameter of the hub component <NUM> to allow for free sliding movement both axially and radially along the hub component <NUM> prior to actuation or engagement of the coupling device <NUM>.

In certain embodiments, the portions <NUM>, <NUM> of the inner element <NUM> may be configured to engage the hub component <NUM> by contraction so that the portions <NUM>, <NUM> grip the hub component <NUM> via frictional forces. To achieve this, at least one of the portions <NUM>, <NUM> of the inner element <NUM> may comprise a plurality of segments defined by one or more dividers (e.g., slots) formed axially in the inner surfaces <NUM>, <NUM> and/or the outer surfaces <NUM>, <NUM> of the portions <NUM>, <NUM>. The dividers may be configured to allow radial deflection of the inner element <NUM> as the coupling device <NUM> is engaged and/or disengaged. In certain embodiments, the dividers may only extend at least partially through one or more of the portions <NUM>, <NUM> of the inner element <NUM>. A number as well as the length, width, and/or spacing of the dividers may be varied to provide a desired flexibility of the inner element <NUM> for a specific application.

An exemplary embodiment of the coupling device <NUM> comprises an inner element <NUM>, an outer element <NUM>, and one or more positioning/retaining elements <NUM> (e.g., a nut, a bolt, a screw, or any type of mechanical fastener, and the like, etc.). The inner element <NUM> may be configured to at least partially fit within the outer element <NUM>. The coupling device <NUM> further comprises a liner <NUM> disposed between the inner element <NUM> and the outer element <NUM>. As depicted, the inner element <NUM> has a generally inclined outer surface <NUM> having an outer diameter that gradually increases from an outer faces <NUM> to an inner face <NUM> thereof. Accordingly, the inner element <NUM> has a generally frustoconical cross-sectional shape. In some embodiments, the inner element <NUM> may be an annular ring.

In certain embodiments, the inner element <NUM> may be configured to engage the hub component <NUM> by contraction so that the inner element <NUM> grips the hub component <NUM> via frictional forces. To achieve this, the inner element <NUM> may comprise a plurality of segments defined by one or more dividers (e.g., slots) formed axially in the inner surface <NUM> and/or the outer surface <NUM>. The dividers may be configured to allow radial deflection of the inner element <NUM> as the coupling device <NUM> is engaged and/or disengaged. In certain embodiments, the dividers may extend at least partially through the inner element <NUM>. A number as well as the length, width, and/or spacing of the dividers may be varied to provide a desired flexibility of the inner element <NUM> for a specific application.

As illustrated, the outer element <NUM> has a generally inclined inner surface <NUM>, having an inner diameter that gradually increases from an outer face <NUM> to an inner face <NUM> thereof. In some embodiments, the outer element <NUM> may be an annular ring.

As illustrated, the outer element <NUM> and/or the hub component <NUM> may each include one or more apertures <NUM> formed therein. In some instances, the apertures <NUM> are formed in a radial array configuration. Each of the apertures <NUM> may be configured to receive a respective one of the positioning/retaining elements <NUM> therein. It is understood that more or less apertures <NUM> than shown may be formed in the outer element and/or the hub component <NUM> as desired.

In certain embodiments, the outer element <NUM> may be configured to engage the inner element <NUM> by contraction so that the outer element <NUM> grips the inner element <NUM> via frictional forces. To achieve this, the outer element <NUM> may comprise one or more segments defined by one or more dividers (e.g., slots, grooves, and the like) formed longitudinally or axially in an outer surface <NUM> and/or an inner surface <NUM> of the outer element <NUM>. The dividers may be configured to allow radial deflection of the outer element <NUM> as the coupling device <NUM> is engaged and/or disengaged. The dividers may extend at least partially through the outer element <NUM>. A number as well as the length, width, and/or spacing of the dividers may be varied to provide a desired flexibility of the outer element <NUM> for a specific application.

The inner surface <NUM> of the outer element <NUM> may be configured to engage the inner element <NUM>. A shape, size, and configuration of the inner surfaces <NUM> may correspond with the outer surface <NUM> of the inner element <NUM>. The outer diameter of the inner element <NUM> may be slightly smaller than the inner diameter of the outer element <NUM> to allow for movement of the outer element <NUM> relative to the inner element <NUM> during actuation or engagement of the coupling device <NUM>.

In the embodiment depicted in <FIG>, the inner element <NUM> and the outer element <NUM> have reciprocally inclined outer surface <NUM> and inner surface <NUM>, respectively. The inner and outer elements <NUM>, <NUM> may be configured so that displacement of the outer element <NUM> relative to the inner element <NUM> imparts greater radial force than axial force. Accordingly, the forces created by the reciprocally inclined surfaces <NUM>, <NUM> cause greater radial forces than axial forces. Therefore, an engagement (e.g., a rotation in a first direction) of the positioning/retaining elements <NUM> causes the inner element <NUM> to be urged radially inward onto the hub component <NUM> with sufficient force to impede axial displacement of the inner element <NUM> relative to the hub component <NUM> and the hub component <NUM> to be urged radially inward onto the shaft component <NUM> with sufficient force to impede axial displacement of the hub component <NUM> relative to the shaft component <NUM>.

As discussed above, the positioning/retaining elements <NUM> may be connected to the outer element <NUM>. In certain instances, each of the positioning/retaining elements <NUM> may include a plurality of external features (e.g., threads, teeth, and the like) formed thereon. The external features of the portioning/retaining <NUM> may be configured to cooperate with the internal features of the apertures <NUM> of the outer element <NUM> and/or the hub component <NUM> to cause relative movement therebetween and/or between the outer element <NUM> and the inner element <NUM>.

The coupling device <NUM> further includes a liner <NUM> for minimizing friction between the outer surface <NUM> of the inner element <NUM> and the inner surface <NUM> of the outer element <NUM>. In some embodiments, the liner <NUM> may be a single unitary structure or be comprised of a plurality of separate portions. The liner <NUM> is produced from an anti-friction fabric. In some embodiments, the liner <NUM> may be directly applied to the inner surface <NUM> of the outer element <NUM>. Additionally, or alternatively, the liner <NUM> may directly applied to the outer surface <NUM> of the inner element <NUM>. In some embodiments, the liner <NUM> may be produced from a woven material coated with a reinforcing thermoset resin. The woven material may include PTFE fibers, aramid fiber, carbon fiber, other comparable fibers, and combinations thereof. In some embodiments, the liner <NUM> may further comprise an additional performance coating comprised of PTFE. In some embodiments, the liner <NUM> may further include a resin layer for self-lubrication. The resin layer may comprise PTFE. In some embodiments, the liner <NUM> may be a Fenlon™ liner fabric such as Fenlon™ Asta, or Fenlon™ Low Friction Solid Lubricants.

To engage the coupling device <NUM> and couple the components <NUM>, <NUM>, the positioning/retaining elements <NUM> are rotated in the first direction causing relative movement between the positioning/retaining element <NUM> and the outer element <NUM> and/or the hub component <NUM> via cooperation of the external and internal features thereof and applying an axial force on the outer element <NUM>. In some instances, the outer element <NUM> and the hub component <NUM> drawn closer together causing a compression of the inner element <NUM>. The reciprocal inclined surfaces <NUM>, <NUM> of the inner and outer elements <NUM>, <NUM>, respectively, result in an inward radial force. In particular, the inner element <NUM> contracts to apply a radially inward force on the hub component <NUM> and the shaft component <NUM>, thereby coupling the components <NUM>, <NUM> together.

To disengage the coupling device <NUM> and decouple the components <NUM>, <NUM>, the positioning/retaining elements <NUM> are rotated in an opposite second direction causing relative movement between the positioning/retaining element <NUM> and the outer element <NUM> and/or the hub component <NUM> via cooperation of the external and internal features thereof and releasing both the axial force on the outer element <NUM> and the inward radial force caused by the reciprocal inclined surfaces <NUM>, <NUM> of the inner and outer elements <NUM>, <NUM>, respectively.

The coupling devices <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM> described herein are an abbreviated list of applicable embodiments. It is understood that the coupling devices <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM> may be keyless locking devices. Adventurously, in some embodiment of the present disclosure, the CoF rating of the coupling devices <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM> is about <NUM>.

The scope of the invention is intended to include any device that utilizes tapered surfaces in combination with a liner comprising an anti-friction fabric as defined in claim <NUM>.

Claim 1:
A device (<NUM>) for coupling components, comprising
a first element (<NUM>,<NUM>) having at least one inclined surface; and
a second element (<NUM>,<NUM>) having at least one inclined surface reciprocal to the at least one inclined surface of the first element, wherein an axial movement of at least one of the elements causes a radial force to be applied to at least one of the components, characterized by a liner (<NUM>) disposed between the at least one inclined surface of the first element and the at least one inclined surface of the second element, wherein the liner is an anti-friction fabric.