Patent ID: 12255034

DETAILED DESCRIPTION

Among those benefits and improvements that have been disclosed, other objects and advantages of this disclosure will become apparent from the following description taken in conjunction with the accompanying figures. Detailed embodiments of the present disclosure are disclosed herein; however, it is to be understood that the disclosed embodiments are merely illustrative of the disclosure that may be embodied in various forms. In addition, each of the examples given regarding the various embodiments of the disclosure which are intended to be illustrative, and not restrictive.

Throughout the specification and claims, the following terms take the meanings explicitly associated herein, unless the context clearly dictates otherwise. All embodiments of the disclosure are intended to be combinable without departing from the scope or spirit of the disclosure.

Certain terminology is used in the foregoing description for convenience and is not intended to be limiting. Words such as “upper,” “lower,” “top,” “bottom,” “first,” and “second” designate directions in the drawings to which reference is made. This terminology includes the words specifically noted above, derivatives thereof, and words of similar import. Additionally, the words “a” and “one” are defined as including one or more of the referenced item unless specifically noted. The phrase “at least one of” followed by a list of two or more items, such as “A, B or C,” means any individual one of A, B or C, as well as any combination thereof.

FIG.1illustrates a side view of an exemplary fuse cutout assembly100utilizing a fuse assembly102according to an illustrated embodiment of the present application. The fuse cutout assembly100can be utilized, for example, in connection with providing protection from at least current surges and overloads in high and medium voltage electric utility services, including, but not limited to, in electrical transmission systems and distribution systems operating at nominal voltages of about 3 kilovolts (kV) to about 38 kV, among other voltages and voltage ranges. In addition to the fuse assembly102, the fuse cutout assembly100can include a cutout body104that supports the fuse assembly102, and to which an insulator106is attached. The cutout body104can include an upper contact108and a lower contact110at opposing ends of the cutout body104that are positioned to be electrically coupled to first and second contacts112,114, respectively, of the fuse assembly102. The upper contact108can be biased by a biasing element so as to provide a biasing force that at least attempts to maintain an engagement between the upper contact108of the cutout body104and the first contact112of the fuse assembly102.

As seen inFIG.1, when the fuse assembly102is supported by the cutout body104, and the first contact112of the fuse assembly102is electrically coupled to the upper contact108of the cutout body104, the cutout body104supports the fuse assembly102at an angle. With respect to at least some of the different types of fuses that can be utilized with embodiments of the subject application, in response to an overcurrent condition, the fuse assembly102can be activated in a manner that can release a strike pin that is housed within the fuse assembly102. The released strike pin can exert a force against, or in the general area, of the upper contact108in manner that can depress a portion of the cutout body104away from the fuse assembly102, thereby facilitating physical and/or electrical disengagement between the first contact112of the fuse assembly102and the upper contact108. In the event the fuse assembly102is to be disengaged from direct contact with the first contact112of the cutout body104, the angle at which the fuse assembly102is supported by the cutout body104can allow gravitational forces to at least assist in the fuse assembly102being pivotally displaced about a lower coupling116of the cutout body104such that the first contact112of the fuse assembly102is rotated away from the upper contact108of the cutout body104.

The cutout body104can include an upper adapter118that can be secured to, or about, an upper end120aof the fuse assembly102. The upper adapter118can be configured, including be sized and/or include features, that can engage mating features of the cutout body104, such as, for example, an upper coupling117of the cutout body104, in a manner that can secure the upper end120aof the fuse assembly102to the cutout body104, as well as accommodate the upper end120abeing released with the upper adapter118from the cutout body104in connection with the fuse assembly102responding to an overcurrent condition.

For example, according to at least some embodiments, the cutout body104can include an attachment hook that can, when the upper adapter118is in proper alignment relative to at least the cutout body104and/or attachment hook, receive, and relatively securely engage, the upper adapter118, and thus the upper end120aof the fuse assembly102, to the cutout body104. Additionally, or alternatively, according to certain embodiments, the cutout body104can include one or more openings or slots (collectively referred to as openings) that can, when the upper adapter118is in proper alignment relative to at least the cutout body104, receive one or more mating pins, which may or may not be coupled to the upper adapter118. According to certain embodiments, such openings can be configured and positioned so as to, in the absence of an overcurrent condition, securely retain engagement of the pins, and/or other features of the upper adapter118with the cutout body104.

In the event of an overcurrent condition, the attachment hook and/or openings of the cutout body104can be displaced, such as, for example, in connection with a strike pin assembly of the fuse assembly102exerting a force against the cutout body104in a manner that lifts or otherwise displaces the hook and/or openings, among other portions of the cutout body104, in a direction that can facilitate disengagement or release of the upper adapter118, and/or associated features of the upper adapter118, from the hook and/or the associated openings of the cutout body104.

As seen inFIG.1, the lower coupling116can also be pivotally coupled to a lower casting or adapter122that is secured to a lower end120bof the fuse assembly102. As seen in at leastFIG.3, the lower adapter122can include a wall124having an inner surface126that generally defines an interior region128of the lower adapter122. The interior region128is configured to receive insertion of at least a portion of the lower end120bof the fuse assembly102, such as, for example, at least a portion of a lower end cap130of the fuse assembly102. According to certain embodiments, the inner surface126can have a generally circular cross-sectional shape. Further, as seen in at leastFIG.4, the wall124can include opposing first and second ends132a,132b.

The lower coupling116of the cutout body104and the lower adapter122that is secured to the fuse assembly102can be configured to secure the lower end120bof the fuse assembly102to the cutout body104. In the event the fuse assembly102responds to an overcurrent condition, such as, for example, releasing a strike pin assembly of the fuse assembly102that facilitates the release of the upper adapter118from the cutout body104, as discussed above, the lower coupling116is further configured to accommodate rotational displacement of the fuse assembly102while the lower adapter122remains attached to the cutout body104. For example, as seen in at leastFIGS.3and4, the lower adapter122can include a pair of pins134that are positioned on opposing sides of the lower adapter122. The pins134of the lower adapter122can each, when properly aligned with the lower coupling116of the cutout body104, be received in a mating opening or slot in the lower adapter122of the cutout body104. Additionally, the pins134of the lower adapter122and mating openings in the lower coupling116of the cutout body104can be sized such that, when the pins134are positioned in the openings, the lower adapter122can be pivotally displaceable about the lower coupling116and relative to at least the cutout body104.

Often, both the upper adapter118and a lower adapter122are secured to, or about, the corresponding upper or lower end120a,120b, respectively, of the fuse assembly102prior to either of the upper adapter118or lower adapter122being coupled to the cutout body104. Further, when secured to the fuse assembly102, misalignment between the upper and lower adapters118,122can result in one, but not both, of the upper and lower adapters118,122being able to securely engage the mating features in the cutout body104. For example, in such a situation, when the pins134of the lower adapter122are positioned to be, or have been, received in the mating openings in the lower coupling116of the cutout body104, the upper adapter118can be attached to the upper end120aof the fuse assembly102at an angular orientation that prevents the upper adapter118, and/or associated features of the upper adapter118, from being matingly received by the hook and/or mating openings, among other features, of the cutout body104.

Such misalignment between at least the upper and lower adapters118,122can occur in a variety of manners. For example, in at least some instances when the upper adapter118is secured to the upper end120aof the fuse assembly102, such misalignment may result from the rotation of the fuse assembly102that can occur when the lower adapter122is being mechanically coupled to the lower end120bof the fuse assembly102. For example, referencingFIGS.3and9, according to certain embodiments, the lower adapter122can include a contact assembly136having a shoe138that provides at least a force against an end cap130of the fuse assembly102that securely clamps or couples the lower adapter122to the end cap130of the fuse assembly102. In at least some instances, the location at which the contact assembly136, such as the shoe138, at least initially contacts the end cap130, and/or the ensuing application of force against the end cap130by the contact assembly136can result in inadvertent rotational displacement of the fuse assembly102within the end cap130, thereby rotating both the fuse assembly102and the upper adapter118in a manner that can result in misalignment between the upper and lower adapters118,122. As previously discussed, such misalignment can, in at least some instances, interfere and/or prevent the fuse assembly102from being secured at both ends of the fuse assembly102to the cutout body104.

FIG.2illustrates a partial cut away side view of an exemplary fuse assembly102according to an illustrated embodiment of the present application. As seen, the fuse assembly102includes a casing140that is positioned between a first end cap130and second end cap130athat are located at opposing ends of the fuse assembly102. According to the illustrated embodiment, an upper end cap142and the lower end cap130can provide the first and second contacts112,114, respectively, of the fuse assembly102. Thus, the ends caps130,142can be constructed from a metallically conductive material, such as, for example, but not limited to, brass, copper, silver, and/or tin, among other materials, as well as various combinations thereof. The casing140can be constructed from a variety of materials, and more specifically, electrically insulating materials. For example, according to certain embodiments, the casing140can be constructed from a ceramic material.

As seen by the cutaway portion ofFIG.2, the casing140can generally define an inner region144of the fuse assembly102that can extend along the casing140between the opposing end caps130,142, and which can house one or more components of the fuse assembly102, as well as insulating and/or arc preventing material(s), such as, for example, sand. For example, as seen inFIG.2, the inner region144can house one or more fuse elements146. The fuse element146is electrically coupled to the first and second contacts112,114of the fuse assembly102, and can be constructed from a variety of materials, including, but not limited to, tin, lead, silver, copper, zinc or brass, among other materials or combinations of materials. As seen inFIG.2, according to the exemplary embodiment, the fuse element146is generally wrapped about a support element or core that can be constructed from an electrically insulative material. However, the fuse element146can be arranged within the inner region144of the casing140in a variety of other manners, including having a generally linear orientation. Further, according to certain embodiments, at least a portion of the fuse element146can be encased or wrapped in an elastomeric material, such as, for example, silicon rubber.

According to an exemplary embodiment, the inner region144can also house a wire or filament148that is coupled to a strike pin assembly of the fuse assembly102. At least prior to activation of a strike pin assembly of the fuse assembly102, the filament148can be maintained in a relatively taut condition such that filament148can provide a holding force against at least a portion of the strike pin assembly that can at least assist in preventing activation of the strike pin assembly. In the event of a current surge or other overload condition, the degree of current flowing through the fuse element146can result in the fuse element146generating heat, and/or cause gases within the inner region144to be heated, to levels that can heat the filament148to a degree that can cause a break(s) or separation(s) in the filament148. Such breakage(s) in the filament148can release the holding force that the filament148had been providing against the strike pin assembly, thereby allowing for activation of the strike pin assembly. While the foregoing is discussed with respect to use of a wire or filament, according to other embodiments of the subject application, other devices, mechanisms, and/or methods can be used to trigger the release of a strike pin of the fuse assembly102. Moreover, in addition to the above-discussed exemplary fuse, embodiments of the subject application can also be used with a variety of other, or different, types of fuse assemblies.

FIGS.5-7illustrate a displaceable pin assembly150of an end cap130for an exemplary fuse assembly102according to an illustrated embodiment of the present application. The end cap130can include a wall152that extends between opposing first and second ends154a,154bof the end cap130. The second end154bof the end cap130can provide an end of the fuse assembly102, while the first end154ais positioned between the second end154band the casing140of the fuse assembly102. According to certain embodiments, the first end154aof the end cap130can be generally adjacent to the casing140. The wall152also includes an outer surface156, at least a portion of which is configured to be received in the interior region128(FIG.3) of the lower adapter122. The outer surface156can have a size, such as, for example, a diameter or cross-sectional length, that can be similar to, if not slightly smaller than, a corresponding size, such as, for example, diameter, of the interior region128of the lower adapter122. Thus, while the outer surface156of the wall152of the end cap130is illustrated as having a circular cross-sectional shape, the outer surface156can have a variety of other shapes, including, for example, hexagonal, among other polygons.

The displaceable pin assembly150includes a plunger158that is displaceable relative to the end cap130. Moreover, as discussed below, according to certain embodiments, the plunger158is displaceable relative to at least the outer surface156of the wall152of the end cap130such that the plunger158can be moved from a location at which at least a first end160of the plunger158is generally flush with the wall152and/or inwardly recessed in the end cap130to a location at which at least the first end160of the plunger158outwardly protrudes, and/or is positioned away, from the outer surface156of the wall152of the end cap130.

As seen inFIGS.6and7, according to certain embodiments, the displaceable pin assembly150includes the plunger158, a support body162, and a biasing element164, such as, for example, a spring, among other types of biasing elements. The plunger158, support body162, and biasing element164can be constructed from a variety of different types of materials, including, for example, metallic and non-metallic materials, as well as combinations thereof. For example, according to certain embodiments, the plunger158can be constructed from plastic, nylon, copper, or brass, among other materials. Similarly, the support body162can also be constructed from plastic, nylon, copper, or brass, among other materials. Further, the biasing element164can comprise a spring that is formed from stainless steel, plastic, or nylon, among other materials.

The end cap130can include a cap bore166that is sized to at least house the support body162. As seen in at leastFIG.6, the cap bore166can inwardly extend from at least one side of the end cap130along a bore axis168. According to certain embodiments, the bore axis168can be non-parallel to a central longitudinal axis170(FIG.5) of the end cap130. Additionally, the bore axis168can be generally perpendicular to, and may or may not intersect, the central longitudinal axis170of the end cap130. As seen in at leastFIGS.5-7, according to certain embodiments, the cap bore166extends through a first side172, but not an opposing second side174, of the end cap130. Alternatively, as seen inFIG.10, according to other embodiments, the cap bore166can be a through-hole that extends through both the first and second sides172,174of the end cap130.

According to the embodiment depicted inFIGS.5-7, the support body162can include a housing wall176that can, according to certain embodiments, generally define an inner area178of the support body162, the housing wall176extending between opposing first and second ends182a,182bof the support body162. The inner area178can be sized to house, as well as accommodate at least linear displacement of, at least a portion of the plunger158. As seen in at leastFIG.7, the inner area178can provide a first bore180that can extend between an end wall184, which may be at or generally adjacent to the second end182bof the support body162, and a shoulder186in the inner area178.

According to certain embodiments, the shoulder186can be provided by a portion of the housing wall176that can reduce and/or restrict a size of the inner area178that is adjacent to the first bore180. The shoulder186can be configured to retain at least a portion of the plunger158within the inner area178of the support body162and/or to the limit the distance that the first end160of the plunger158can be linearly displaced in a generally outwardly direction away from the end cap130. According to certain embodiments, the shoulder186can be provided by a second bore188of the inner area178, the second bore188having a size, such as, for example, a diameter, that is smaller than a corresponding size of the first bore180. Alternatively, the shoulder186can be provided by a portion of the housing wall176that is inwardly formed and/or deformed into the inner area178so as to provide a barrier or inference feature within the inner area178. Further, according to certain embodiments, the shoulder186may be provided a retaining or snap ring or clip that is received in a mating groove in the housing wall176that extends around at least a portion of the inner area178.

The inner area178of the support body162can include an opening190at a first end182aof the support body162. The opening190can at least provide a location at which the first end160of the plunger158can exit the inner area178so as to outwardly extend or projection away from the support body162and/or the end cap130, as shown inFIG.6. The opening190can also be sized to accommodate at least the first end160of the plunger158being received into the inner area178when the plunger158is displaced to a retracted, or displaced to a recessed position, as seen inFIG.7.

The support body162can be secured to the end cap130and/or the cap bore166in a variety of manners. For example, according to certain embodiments, the outer surface of the housing wall176includes an external thread that is configured to securely engage a mating internal thread of the cap bore166. Further, a first end182aof the support body162can have an engagement portion192, such as, for example, a slot, that can receive a tool, such as, for example, a screwdriver, that can be used to drive or displace the support body162into the cap bore166. Alternatively, or additionally, an adhesive material can be used to secure the support body162within the cap bore166of the end cap130. Further, according to certain embodiments, an adhesive material can be positioned around portions of an external thread of the support body162that forms a bond between at least a portion of the external thread of the support body162and an adjacent portion of the internal thread of the cap bore166.

Further, according to certain embodiments, the housing wall176can have a size, such as, for example, an outer diameter, that accommodates the housing wall176being secured within the cap bore166via a press or interference fit between the housing wall176and the cap bore166.

The plunger158can extend from the first end160of the plunger158to a second end194of the plunger158, and can have a variety of shapes and configurations. According to certain embodiments, the plunger158can be sized for linear displacement of at least a portion of the plunger158within the inner area178of the support body162. Further, at least a portion of the plunger158can be sized so as to engage the shoulder186of the support body162in a manner that can at least assist in retaining at least a portion of the plunger158within the support body162. For example, as seen in at leastFIG.6, according to certain embodiments, the plunger158has a first portion196at least at the first end160of the plunger158that is sized to pass through the opening190of the inner area178of the support body162, and a second, larger portion198that can be slidingly displaced within the first bore180of the inner area178. The second portion198can thus have a size, such as, for example, an outer diameter, that is larger than a corresponding size of the first portion196of the plunger158such that the second portion198can engage the shoulder186of the support body162in a manner that can assist in retaining at least a portion of the plunger158within the support body162. Further, according to certain embodiments, the second portion198can have a size, such as, for example, outer diameter, that is similar to a size of the first bore180of the inner area178, such as, an inner diameter, such that linear displacement of the plunger158within the inner area178can be guided by the second portion198. While the second portion198is illustrated as extending to the second end194of the plunger158, according to other embodiments, the second portion198can be offset from the second end194of the plunger158. Further, the second portion198can have a variety of shapes and configurations, including, for example, being a flange or comprising one or more protrusions that outwardly extend relative to at least an outer surface or circumference of the first portion196of the plunger158.

The biasing element164, which can be optional, can, according to certain embodiments, be configured to outwardly bias the plunger158to a first, extended position, as seen inFIG.6. According to such an embodiment, at least a portion of the biasing element164, such as, for example, a spring, can be positioned between a second end182bof the support body162and a second end194and/or second portion198of the plunger158. For example, according to the illustrated embodiment, the biasing element164can be housed within the first bore180of the inner area178of the support body162and positioned against both the end wall184of the support body162and the second end194and/or second portion198of the plunger158.

The cap bore166of the end cap130and the displaceable pin assembly150can be positioned about the end cap130, and/or be configured, such that, at least when the plunger158is at the first, extended position, the first end160of the plunger158can extend into, if not protrude through, a notch200(e.g., an opening, etc., shown inFIG.4) in an adjacent side of the lower adapter122, as seen, for example, in at leastFIGS.8and9. The notch200in the lower adapter122and the displaceable pin assembly150can each be positioned in a manner that corresponds to a particular, selected alignment of at least the lower adapter122relative to the fuse assembly102and/or the upper adapter118. For example, the alignment of the fuse assembly102relative to the lower adapter122can be selected such that the plunger158of the end cap130extends into the notch200of the lower adapter122when a particular relative rotational and/or linear alignment is attained between the lower adapter122and the fuse assembly102. When attained, such alignment can also correspond to the upper and lower adapters118,122being in rotational and/or linear alignment with each other about the fuse assembly102such that, when the fuse assembly102is to be coupled to the cutout body104, the upper and lower adapters118,122are in proper orientation and placement for being coupled to the mating upper and lower couplings115,116of the cutout body104.

As seen in at leastFIG.4, the notch200in the wall124of the lower adapter122can include a pair of opposing sidewalls202a,202bthat are adjoined by a top wall206of the notch200, the sidewalls202a,202band top wall206generally defining an aperture208of the notch200. Further, the notch200can upwardly extend through the second end132bof the wall124of the lower adapter122in a direction generally toward the first end132aof the wall124. Thus, according to certain embodiments, the aperture208of the notch200may, or may not, provide an opening that extends through the second end132bof the wall124, and which is in fluid communication with the aperture208.

The sidewalls202a,202bof the notch200can extend in a direction that is, at least when the end cap130is secured in the lower adapter122, generally parallel to the central longitudinal axis170of the end cap130. As illustrated, the central longitudinal axis170can extend through the opposing first and second ends132a,132bof the wall124of the lower adapter122, the first end132abeing generally adjacent to the casing140. As indicated byFIG.4, the sidewalls202a,202bcan be separated from each other such that the aperture208of the notch200has a width (as generally indicated by “w1” inFIG.4) therebetween that is a larger than a corresponding width of at least the portion of the plunger158that will extend through and/or into, the notch200. Such a width of the aperture208of the notch200can provide clearance so as to prevent adjacent portions of the wall124of the lower adapter122from interfering with the displacement of the plunger158at least into the aperture208. However, such differences between the width of the aperture298and the corresponding size, such as, for example, a diameter, of the plunger158, can be relatively minimal so as to minimize, and/or prevent, rotation of the end cap130relative to the lower adapter122at least when the plunger158is positioned in the aperture208of the notch200. Moreover, each of the sidewalls202a,202bcan be proximately adjacent to the extended plunger158such that rotation of the end cap130, and thus fuse assembly102, relative to the lower adapter122may be minimized, if not prevented, by the plunger158contacting an adjacent sidewall202a,202b. Such a configuration can assist in generally maintaining an alignment of the lower adapter122relative to the end cap130, and thus the fuse assembly102, and/or maintaining the lower adapter122at a location at which the lower adapter122will be properly aligned with the upper adapter118.

According to certain embodiments, when extended from the second, retracted position (FIG.7) to the first, extended position, an upper side of the plunger158can be positioned at a vertical height (as generally indicated by “h1” inFIG.5) to be adjacent to, and/or abut, a top wall206of the notch200. According to such embodiments, such positioning of the extended plunger158relative to a corresponding vertical position (as generally indicated by “h2” inFIG.4) of the top wall206of the notch200can, at least temporarily, allow the plunger158to provide at least a degree of support to the lower adapter122and/or assist with providing a particular linear alignment of the end cap130, and thus fuse assembly102, relative to at least the lower adapter122. Further, such relative positioning of the extended plunger158and the top wall206of the notch200can provide a barrier between the extended plunger158and the top wall206of the notch200that can limit, and/or prevent, linear displacement of the end cap130in a direction generally from the second end132btoward the first end132aof the lower adapter122, and thereby limit or prevent associated displacement of the fuse assembly102, as well as assist in attaining a particular relative linear alignment of the lower adapter122relative to at least the end cap130. Additionally, the presence of the extended plunger158within at least a portion of the notch200can provide a visual indication to the installer as to the lower adapter122being at a desired angular orientation and/or alignment relative to at least the end cap130and/or fuse assembly102. Further, as seen in at leastFIGS.4and5, according to certain embodiments, at least the first end160of the plunger158can have a size and configuration, such as, for example, curvature, that corresponds to a similar configuration of the top wall206.

ReferencingFIG.4, at least certain types of fuse assemblies102are, or can be, received into the interior region128of the lower adapter122by the end cap130entering into the interior region128of the lower adapter122from the first end132aof the lower adapter122. In such situations, the end cap130is inserted into the interior region128from the first end132aof the lower adapter122and moves at least in the general direction toward the second end132bof the lower adapter122. However, as shown inFIG.4, the notch200of the illustrated exemplary lower adapter122does not extend to the first end132aof the lower adapter122. Thus, in such situations, insertion of the end cap130into the interior region128can include the plunger158being at the second, retracted position, as shown inFIG.7, such that the plunger158is not positioned to interfere with insertion of the end cap130into the interior region128of the lower adapter122. Further, according to embodiments in which the displaceable fuse assembly102includes a biasing element164that is configured and/or positioned to outwardly bias the plunger158toward the first, extended position, insertion of the end cap130into the interior region128of the lower adapter122can include exerting a force against the plunger158that can overcome the biasing force of the biasing element164in a manner that displaces the plunger158to the second, retracted position. Such force can be applied, for example, by a digit of an installer, prior to the plunger158contacting, or, alternatively as the plunger158is coming into contact with, the first end132aof the wall124of the lower adapter122such that the plunger158is retracted to a position that will not interfere with the continued displacement of the end cap130into the interior region128of the lower adapter122.

As the recessed plunger158enters interior region128of the lower adapter122, the recessed plunger158can abut an opposing inner surface126of the wall124of the lower adapter122such that the plunger158generally remains at the second, retracted position. ReferencingFIG.7, at the second, retracted position, the first end160of the plunger158can be relatively flush or even with the outer surface156of the wall152of the end cap130such that the first end160of the plunger158is generally not outwardly extending away from the plunger158. According to the illustrated embodiment, at the second, retracted position, substantially all, if not all, of the first and second portions196,198of the plunger158can each be housed within the interior area178of the support body162. Accordingly, the second end194of the plunger158can be inwardly positioned within the inner area178of the support body162to a location that can displace the biasing element164into a generally compressed state, as seen inFIG.7. Further, with the second end194of the plunger158inwardly positioned within the inner area178of the support body162, the second portion198of the plunger158can be generally remote from the shoulder186within the inner area178of the support body162.

The operator can continue to insert the end cap130into the interior region128of the lower adapter122, and/or adjust an angular position of the lower adapter122relative to the inserted end cap130, until the displaceable pin assembly150is aligned with the notch200such that at least the first end160of the plunger158can extend into and/or through the aperture208of the notch200. Upon the displaceable pin assembly150being displaced into alignment with the notch200, the wall124of the lower adapter122may no longer retain the plunger158at the second, retracted position. Thus, according to the illustrated embodiment, the biasing element164can be released from a generally compressed state (FIG.7) to a generally uncompressed state, as seen inFIG.6. As the biasing element164is uncompressed, the biasing element164can provide a force that at least linearly displaces the plunger from the second, retracted position to the first, extended position, as seen in at leastFIG.6. Moreover, such displacement of the plunger158can result in at least a portion of the first end160and/or first portion196of the plunger158extending into, and possibly through, the aperture208of the notch200, as seen inFIGS.8and9. Further, according to the illustrated embodiment, as the plunger158is outwardly displaced, the second portion198of the plunger158can come into contact with the shoulder186within the inner area178of the support body162in a manner that can stop, or limit the extent of, the outward displacement of the plunger158.

In the event the lower adapter122is to be removed from the end cap130, and thus removed from the fuse assembly102, the plunger158can again be depressed, such as, for example, by a digit of the installer, such that the plunger158is displaced from the first, extended position to the second, retracted position. The plunger158can then be retracted from the aperture208of the notch200and into the support body162such that the plunger158is not at a position to interfere with removal of the lower adapter122from the end cap130, or vice versa.

FIG.10illustrates a cross sectional view of another exemplary displaceable pin assembly150′ according to an illustrated embodiment of the present application. Unlike the displaceable pin assembly150shown inFIGS.6and7, the plunger158′ of the displaceable pin assembly150′ shown inFIG.10is housed within the cap bore166, and not within the support body162′. Further, optionally, according to certain embodiments the cap bore166′ can provide a through-hole that extends through both the first and second ends154a,154bof the end cap130. According to certain embodiments, the cap bore166′ shown inFIG.10can have a configuration that is similar to the configuration of the inner area178of the support body162′ that is depicted in at leastFIGS.6and7. Moreover, the cap bore166′ shown inFIG.10can provide a first bore210that can extend from, or be generally adjacent to, the second end154bof the end cap130to a second bore212of the cap bore166′. The second bore212can have a size, such as, for example, diameter, that is different than a corresponding size of the first bore210so as to provide a shoulder214within the cap bore166′ at the location at which the cap bore166′ transitions between the first and second bores210,212. Further, at least a portion of the cap bore166′ can be configured to receive secure placement of the support body162′ within the cap bore166′, such as, for example, via a threaded engagement between external threads of the support body162′ and internal threads of the cap bore166′ and/or an adhesive, among other manners of attaining a secure placement of the support body162′ within the cap bore166′.

Similar to the previously discussed displaceable pin assembly150′ embodiment, the displaceable pin assembly150′ can include a biasing element164′, such as, for example, a spring, that can be configured and/or positioned to outwardly bias the plunger158′ to the first, extended position, as seen inFIG.10. According to certain embodiments, the biasing element164′ can be in an area within the cap bore166′ that is between an end wall184of the support body162′ and the second end194of the plunger158′. Thus, similar to the plunger158′, the biasing element164′ can be positioned at a location outside of the support body162′. Additionally, a space216between the end wall184of the support body162′ and the second end194of the plunger158′ can be sized, such as, for example, have a length, such that the space216can accommodate both placement of the biasing element164′ and sufficient inward displacement of the plunger158′ into the space216so as to accommodate displacement of the plunger158′ to the second, recessed position. Moreover, the space216can be sized to accommodate displacement of the plunger158′ into the space216such that the first end160of the plunger158′ can be moved into, or adjacent to, the cap bore166so as to be relatively flush or even with the outer surface156of the wall152of the end cap130when the plunger158′ at the second, retracted position.

FIGS.11-14illustrate another exemplary embodiment of a displaceable pin assembly150″ in which, in addition to being linearly being displaced between first and second positions, the plunger158″ is rotatable to lock, or unlock, a plunger158″ at/from the first, extended position. The displaceable pin assembly150″ can include the plunger158″ and a support body162″. As seen inFIGS.13and15, similar to the embodiment shown in at leastFIG.10, according to certain embodiments, the plunger158″ can be housed within the cap bore166but outside of the support body162″. Further, the support body162″ can be positioned within the cap bore166relative to the plunger158″ so as to provide a space218that can receive at least a portion of the plunger158″ as the plunger158″ is displaced from the first, extended position (FIG.13) to the second, retracted position (FIG.15). The space218can be sized such that the first end160of the plunger158″ can be relatively flush or even with the outer surface156of the wall152of the end cap130when the plunger158″ is displaced to the second, retracted position. The support body162″ can further be positioned to limit the distance the plunger158″ can inwardly travel when being displaced to the second, retracted position. Further, at least a portion of the support body162″, as well as at least a portion of the cap bore166, can be configured to securely place the support body162″ within the cap bore166, such as, for example, via a threaded engagement between external threads of the support body162″ and internal threads of the cap bore166and/or an adhesive, among other manners of attaining a secure placement of the support body162″ within the cap bore166.

Additionally, or optionally, the displaceable pin assembly150″ can include a biasing element164″. According to certain embodiments, the biasing element164″ can provide an inwardly biasing force that biases the plunger158″ to the second, retracted position. For example, as seen in at leastFIG.13, the biasing element164″ can be a spring that is positioned between the shoulder220within the cap bore166and a second portion198of the plunger158″ such that the biasing element provides a force that seeks to retract the plunger158″ into the cap bore166.

ReferencingFIGS.11,12, and14according to certain embodiments, the first end160and/or first portion222of the plunger158″ and a portion of the cap bore166can both include mating engagement sections224,226that can be utilized to lock the plunger158″ generally at the first, extended position. For example, according to certain embodiments, the engagement section224of the plunger158″ and the engagement section226of the cap bore166can have mating geometric features that, when properly aligned, can accommodate linear displacement of the plunger158″ relative to the cap bore166, but which when misaligned, provide an interference that prevents or limits such displacement, and thereby can generally lock the linear position of the plunger158″.

For example, as seen in at leastFIG.12, according to certain embodiments, the engagement section224of the plunger158″ can be an asymmetrical configuration at the first end160and/or first portion196of the plunger158″, such as, for example, a D-shaped first end160and/or first portion196. Similarly, a counter bore228of the cap bore166can have an engagement section226having a configuration that is similar to the engagement section224of the plunger158″, such as, for example, a mating D-shaped bore configuration, as seen for example inFIG.11. Thus, when the asymmetrical engagement section224of the plunger158″ is at an angular orientation that is aligned with the mating asymmetrical engagement section224of the counter bore228, as seen inFIGS.11and13, the engagement section224of the plunger158″ can be removed from, or received in, the counter bore228of the cap bore166. However, rotation of the plunger158″ in a first direction relative to the cap bore166can result in misalignment engagement sections224,226of the plunger158″ and cap bore166, respectively. For example, as seen inFIGS.14and15, in the illustrated embodiment, rotation of the plunger158″ about 180 degrees relative to the cap bore166can result in the engagement section224of the plunger158″ being misaligned with the mating engagement section224of the counter bore228. Thus, as seen inFIGS.14and15, the portion of the plunger158″ that is outside of the cap bore166, and which is adjacent to a flat portion of the D-shaped engagement section226of the counter bore228, can upwardly extend beyond the counter bore228. At such a relative angular orientation, the extended portion of the plunger158″ can be prevented from retracting back into the cap bore166. Instead, a rear side230of the engagement section224of the plunger158″ abuts a portion of the outer surface156of the wall152of the end cap130that is adjacent to the cap bore166, thereby preventing the extended portion of the plunger158″ from returning to the second, retracted position. In such a situation, the plunger158″ can be locked at the first, extended position. In the event the plunger158″ is to subsequently return to the second, retracted position, the plunger158″ can be rotated in a second direction to realign the asymmetrical engagement section224of the plunger158″ with the mating engagement section224of the counter bore228, the second direction of rotation being opposite of the first direction of rotation. With the engagement sections224,226of the plunger158″ and cap bore166realigned following rotation in the second direction, the plunger158″ can again be linearly displaced to the second, retracted position, such as, for example, via a biasing force of the optional biasing element164and/or by a force provided by the installer.

ReferencingFIGS.14and15, the plunger158″ can include a retention body232a,232bthat can accommodate the plunger158″ being grasped or otherwise engaged by an installer, either directly and/or through use of a tool. Such a retention body232a,232bcan facilitate the installer linearly displacing the plunger158″, such as, for example, by providing a force against the plunger158″ that can overcome a biasing force of a biasing element164, and/or to provide a force to rotate the plunger158″ in the first and/or second directions of rotation. According to certain embodiments, at least a portion of the retention body232acan be generally inwardly recessed from, and/or flush with, the first end160of the plunger158″. For example, as seen in at leastFIGS.11and14, the retention body232acan be a tab that is positioned between a pair of cavities234that inwardly extend from the first end160of the plunger158″, the tab providing areas that can be grasped by a tool, such as, for example, opposing jaws of pliers. Alternatively, as seen inFIG.16, according other embodiments, the retention body232bcan be a tab can outwardly extend or protrude from the first end160of the plunger158″. The retention bodies232a,232bcan also have a variety of shapes and configurations, including, but not limited to, having a generally square or rectangular cross-sectional configuration, as well as being hooked shaped, among other configurations.

FIG.17illustrates an alternative embodiment in which the plunger158″ is configured to be linearly displaced while being rotated from the second, retracted position to the first, extended position, and vice versa. As seen, the plunger158″ can include a locking detent236that extends from an outer surface of the plunger158″. According to the illustrated embodiment, the locking detent150″ can radially outwardly extend from the outer surface of the plunger158″ in a direction that is generally perpendicular to a central longitudinal axis of the plunger158″ that extends through the first and second ends160,194of the plunger158″. Further, the locking detent236can be slidingly positioned in a locking groove238in the support body162and/or cap bore166. The locking groove238can have at least a partial helical configuration such that, in response to an installer rotating the plunger158″, the locking detent236can be displaced within the locking groove238in a both rotational and a linear direction. For example, as seen inFIG.17, the locking groove238can include a guide groove240that is positioned at least between a first end242and a second end244of the locking groove238. According to the illustrated embodiment, the plunger158′″ can be rotated such that the locking detent236generally moves upwardly and outwardly along the guide groove240, thereby resulting in associated displacement of the plunger158″ at least in the direction of the first, extended position. The length and configuration of the guide groove240can accommodate the plunger158″ being generally at the first, extended position when the locking detent236reaches the first end242of the locking groove238, be at the second, retracted position when the locking detent is at the second end244of the locking groove238.

One or both of the first and second ends242,244of the locking groove238can include a retention cavity246that is configured to assist in retaining the locking detent236at the associated first or second end242,244of the locking groove238. The retention cavity(ies)246can be configured to extend in a direction that is different than the direction at which the adjacent portion of the guide groove240extends. For example, while the guide groove240in the illustrated embodiment extends in a generally upwardly and outwardly direction generally from, or from around, the second end244to the first end242of the locking groove238, the retention cavity246at the first end242of the locking groove238generally extends from the guide groove240in a downward direction. Thus, removal of the locking detent236from the illustrated retention cavity246would involve rotating the plunger in a second direction so that the locking detent236were generally upwardly raised from the retention cavity246. The plunger158″ may then be linearly displaced in an inwardly direction as the locking detent236is moved into the guide groove240. Such inward displacement of the plunger158″ may involve overcoming an outwardly biasing force of a biasing element of the displaceable pin assembly150″, such as, for example, a biasing element similar to the biasing element164illustrated in at leastFIG.6, before the plunger158″. With the locking detent236at the guide groove240, the plunger158″ can be rotated in a first direction so as to lower the detent236along the guide groove240in a direction generally toward the second end244of the locking groove238.

Each of the displaceable pin assemblies150,150′,150″,150″ discussed herein, as well as variations thereof, can be utilized with other features of the end cap130that can assist in securing the lower adapter122at a particular angular orientation relative to the end cap130. For example, as seen inFIG.3, the lower adapter122can include a contact assembly136of that comprises a clamping plate or shoe138, a bolt248, and a nut250. The wall124of the lower adapter122can include an opening through which at least a portion of the shoe138can be selectively displaced into a portion of the interior region128of the lower adapter122and/or displaced into contact with an adjacent portion of the second side174of the end cap130that is generally positioned within the interior region128of the lower adapter122. The wall124of the lower adapter122can also include a threaded aperture through which a portion of the bolt248can pass through, or around, the wall124to selectively engage the shoe138with the adjacent portion of the end cap130.

Rotational displacement of the bolt248can facilitate linear displacement of the shoe138, thereby linearly displacing the shoe138toward and/or at least partially into, or away, from the interior region128of the lower adapter122, and thus either toward or away from an adjacent second side174of the end cap130of the fuse assembly102that is positioned within the interior region128. Further, depending on the direction and degree of displacement of the shoe138, such displacement of the shoe138can be utilized to exert a force against the end cap130of the fuse assembly102that clamps, or otherwise secures, the lower adapter122to the fuse assembly102, or, alternatively, to release such a force from the end cap130.

ReferencingFIGS.18-20, the end cap130of the fuse assembly102that is placed within the interior region128of the lower adapter122can include a recessed retention body252in a wall152of the end cap130. The recessed retention body252of the end cap130is configured and positioned for engagement with at least a portion of an inner wall of the shoe138. According to the illustrated embodiment, when the plunger158,158′,158″,158″ is positioned within the notch200of the lower adapter122, and thus at the first, extended position, at least a portion of the plunger158,158′,158″,158″ is positioned between, and in relative close proximity to, the sidewalls202a,202bof the notch200so as to provide a barrier to prevent rotational displacement of the lower adapter122about the end cap130that can result in engagement between the shoe138and the end cap130, including with the recessed retention body252.

According to certain embodiments, the recessed retention body252includes retention walls254a,254bthat upwardly and/or outwardly extend from an adjacent portion of an engagement surface256of the retention body252to the outer surface156of the wall152of the end cap130. Thus, each retention wall254a,254bcan have a size, such as, for example, length or height, between an adjacent portion of the engagement surface256and the outer surface156of the wall152of the end cap130. Such a length or height of the retention walls254a,254bcan allow the retention walls254a,254bto be configured to abut an adjacent sidewall of the shoe138in a manner that can provide a barrier that can prevent rotational displacement of the end cap130, and thus the fuse assembly102, along the central longitudinal axis170of the end cap130while the retention body252is receiving the shoe138and/or while the shoe138is being displaced in a manner in which the shoe138is exerting a force against the engagement surface256of the retention body252.

The retention walls254a,254bcan generally upwardly and/or outwardly extend from an adjacent portion of an engagement surface256of the retention body252to the outer surface156of the wall152of the end cap130in a manner that may, or may not, result in the retention walls254a,254bbeing parallel to each other. For example, as shown by the profiles of the retention walls254a,254billustrated inFIG.19, according to certain embodiments, the retention walls254a,254bcan generally upwardly and/or outwardly extend in divergent directions from a corresponding adjacent portion of an engagement surface256of the retention body252to the outer surface156of the wall152of the end cap130. However, the retention walls254a,254bcan have a variety of other profiles, including, for example, profiles in which the retention walls254a,254bare parallel to each other.

Additionally, the retention walls254a,254bcan extend at least along a portion of a length of the end cap130in a direction between the first and second ends154a,154bof the end cap130. For example, as shown inFIG.17, according to certain embodiments, the retention walls254a,254bcan extend from the first end154ato the second end154bof the end cap130in a direction that is generally parallel to the central longitudinal axis170of the end cap130. Thus, according to such an embodiment, in addition to being parallel to the central longitudinal axis170of the end cap130, the retention walls254a,254bcan be generally parallel to each other along the length of the end cap130. However, the retention walls254a,254bcan extend in other directions so as to conform to the orientation of the first and second sidewalls204a,204b(FIG.20) of the shoe138that are to be positioned generally adjacent to the retention walls254a,254bat least when the inner wall of the shoe138is engaged with the engagement surface256of the retention body252.

According to certain embodiment, the retention body252can have a width that extends between the retention walls254a,254bthat is similar to, if not slightly larger, than a corresponding width of the shoe138. Such similarities between the widths of the retention body252between the retention walls254a,254band width of the shoe138between the sidewalls of the shoe138can result in the sidewalls of the shoe138being in relatively close proximity to. and/or abutment with, adjacent portions of the associated retention wall254a,254b. Further, such similarities in widths of the retention body252and the shoe138, along with the barrier provided by the height or length of retention walls254a,254bbetween the outer surface156of the wall152and the engagement surface156, can further assist in preventing and/or minimizing inadvertent rotational displacement of the end cap130, and thus the fuse assembly102, that may be associated with the shoe138exerting a force against the end cap130at least when the inner wall of the shoe138is engaged with the engagement surface256of the retention body252.

The engagement surface256of the retention body252can have a variety of different configurations. For example, according to the embodiment shown inFIG.17, the engagement surface256can comprise one or more first and second descending walls or segments258a,258bthat downwardly and outwardly extend in divergent directions from opposing sides of an apex wall or segment260that is generally positioned along at least a midsection of the engagement surface256. According to the illustrated embodiments, each of the one or more first and second descending walls or segments258a,258band apex wall or segment260can be generally flat surfaces that are non-planar with each other, and are in arranged in a manner that generally provides the engagement surface256with a segmented convex or arc shaped surface. Thus, for example, according to the illustrated embodiment, the first and second descending walls or segments258a,258bmay each be joined to the apex wall or segment260at an angle that is less than 180 degrees. The degree at which the first and second descending walls or segments258a,258bcan each be joined to the apex wall or segment260can be based on a variety of different factors. For example, the engagement surface256of the retention body252can be configured to generally conform to the shape of the opposing inner surface of the shoe138. Thus, as illustrated inFIG.19, according to certain embodiments in which the inner wall of the shoe138has an inwardly curved or concave configuration, the first and second descending walls or segments258a,258band apex wall or segment260of the engagement surface256can be configured and arranged in a manner that at least attempts to generally form and/or generally follow along, a outwardly curved or convex shape that is generally arranged along a radius (as indicated by “r” inFIG.19).

As discussed above, the retention body252can have a length between the first and second ends154a,154bof the end cap130in a direction that is generally parallel to the central longitudinal axis170of the end cap130. Such length of the retention body252can, for example, result in the retention body252extending from the first end154ato the second end154bof the end cap130, as illustrated, for example, by the embodiment depicted in at leastFIG.18. According to other embodiments, such a configuration can result in the retention body252extending from one of the first and second ends154a,154bof the end cap130but not reaching the other of the first and second ends154a,154b. Alternatively, such a configuration can result in a portion of the retention body252extending from the first end154ato the second end154b, while another portion of the retention body252extends from one of the first and second ends154a,154bof the end cap130but does not reach the other of the first and second ends154a,154b.

As illustrated inFIG.18, the end cap130can have a length between the first and second ends154a,154bof the end cap130that is longer than a corresponding length between at least the first and second ends132a,132bof the wall124of the lower adapter122. Thus, when the end cap130is positioned and/or secured within the interior region128of the lower adapter122, at least a portion of the end cap130can protrude from either, or both, of the first and second ends132a,132bof wall124of the lower adapter122and/or from the interior region128of the lower adapter122. Such protruding portion(s) of the end cap130can be visible to the individual or installer that is securing, or has secured, the lower adapter122to the end cap130via use of shoe138of the contact assembly136. Thus, according to embodiments in which the length of at least a portion of the retention body252in a direction generally parallel to the central longitudinal axis170is larger than a corresponding length of the lower adapter122, a portion of retention body252can be visible from outside of the lower adapter122.

The visually accessible portion(s) of retention body252can provide a visual indicator to the installer of the angular orientation of the retention body252relative to at least the shoe138. Moreover, in addition to the plunger158,158′,158″,158″ being visibly positioned in the notch200of the lower adapter122, the visible portion of the retention body252can provide the installer with an indication of the current alignment of the retention body252relative to at least the shoe138and/or the lower adapter122, and thus the fuse assembly102relative to the lower adapter122. According to certain embodiments, the installer can use the visual confirmation of the presence of the plunger158,158′,158″,158′ in the notch200and/or the indication of the relative positioning of the retention body252relative to at least the shoe138to determine, at least prior to attempting to secure the upper and lower adapters118,122, and thus the fuse assembly102, to the cutout body104, whether the angular orientation of the end cap130relative to the shoe138and/or lower adapter122should be adjusted.

FIGS.21A and21Billustrate side perspective views of a displaceable pin assemblies300a,300bfor an end cap130for an exemplary fuse assembly100according to an illustrated embodiment of the present application. As seen, the displaceable pin assemblies300a,300bcan each include a spring body302and a plunger304.

The spring body302can be constructed from a variety of different materials, including, for example, spring steel, among other materials. For example, according to certain embodiments, the spring body302can be constructed from a generally low-alloy manganese steel, medium-carbon steel, or high-carbon steel with a relatively high yield and/or tension strength. According to certain embodiments, the spring body302comprises a “C” or “U” shaped spring.

Additionally, according to certain embodiments, the spring body302may, for example, comprise a round wire or rectangular wire that is formed in “C” or “U” shape, among other shapes. Thus, for example, the spring bodies302illustrated for the pin assemblies300a,300binFIGS.21A and21Bcan have a generally rectangular body that extends generally along a radius from a first end306to a second end308of the spring body302so that the spring body302has a curved, arced, and/or semi-circular configuration. The spring body302can be configured to provide a spring force that outwardly biases the plunger304to an extended position relative to at least the end cap130, as discussed below.

The plunger304can be securely coupled to the spring body302, such as, for example, via a mechanical fastener, adhesive, and/or weld, among other manners of securing the plunger304to the spring body302. Further, the plunger304may, or may not, be formed form a metallic material, as well as from other materials, including, but not limited to, plastic, nylon, copper, or brass. Additionally, as illustrated, the plunger304can be positioned about the spring body302such that the plunger304outwardly extends away, or outwardly projects, from the spring body302. Further, the plunger304can be positioned at a variety of locations about the spring body302. For example, referencingFIG.25A, according to certain embodiments, the plunger304can be positioned proximately adjacent to the first or second end306,308of the spring body302. Alternatively, as shown inFIG.25B, according to certain embodiments, the plunger304can be positioned at a location that is generally midway between the first and second ends306,308of the spring body302, among other positions along the spring body302.

ReferencingFIG.22, the second end154bof the end cap130can be include a cavity310that generally extends through second end154band in a direction generally toward the first end154aof the end cap130. Thus, the cavity310can be recessed into the end cap130. According to the embodiment illustrated inFIG.22, the cavity310can generally extend along the central longitudinal axis170of the end cap130, and thus may be generally concentric with the end cap130. Alternatively, as shown inFIG.23, the cavity310can generally extend along a longitudinal axis312that is generally parallel to, but offset from, the central longitudinal axis170of the end cap130such that the cavity310is not concentric with the end cap130.

The cavity310is sized to receive placement of, as well as accommodate a degree of compression, deformation, and/or deflection of, the spring body302. For example, the cavity310can be generally defined by a cavity wall that has a size, such as, for example, diameter or radius, that corresponds to a similar size of the spring body302when the spring body302is not, or is partially in, a compressed state. Similarly, the cavity wall314can have a length in a direction that is generally parallel to the central longitudinal axis170of the end cap130and/or the longitudinal axis312of the cavity310that can correspond to, or be larger than, a corresponding width between opposing side walls316a,316bof the spring body302.

The cavity310can also include a lip318along an opening311of the cavity310at the second end154bof the end cap130. The lip318can have a size, such as, for example, diameter or radius, that is smaller than the corresponding size of the cavity wall314. Such differences in sizes between the lip318and the cavity wall314can allow the lip318to provide a wall, barrier, or interference, that can at least assist in preventing and/or minimizing linear displacement of the spring body302in a direction toward the second end154bof the end cap130. Additionally, the barrier provided by the lip318can assist in preventing inadvertent removal of the spring body302, and thus the displaceable pin assembly300a,300b, from the cavity310of the end cap130. During assembly, the spring body302may be compressed such that a size of the spring body302, while compressed, is at least small enough to pass through the lip318and into the cavity310of the end cap130.

According to certain embodiments, the cavity310can include one or more shoulders320, such as, for example, a wall, protrusion, or projection, that is positioned to abut against an adjacent one of the first end306or second end308of the spring body302. Moreover, a first shoulder320can be positioned along the cavity wall314to abut against the first end306of the spring body302, and/or a second shoulder320can be positioned to abut against the second end308of the spring body302at a location that can prevent inadvertent rotational displacement of the spring body302along the cavity wall314. Alternatively, as shown inFIGS.25A and25B, the cavity310′ can have a shape, such as, for example, a “D” shape, such that the cavity wall314includes a shoulder wall322that is positioned to abut one or both of the first and second ends306,308of the spring body302.

The end cap130can further include a cap bore324that extends through the outer surface156of the wall152of the end cap130and to the cavity310,310′. Thus, the cap bore324may be in fluid communication with the cavity310,310′. According to certain embodiments, the cap bore324can extend along an axis that is generally perpendicular to, and may or may not intersect, the central longitudinal axis170of the end cap130and/or the longitudinal axis312of the cavity310,310′. The cap bore324is sized to receive placement, as well as accommodate at least a degree of linear displacement, of the plunger304.

FIGS.24A and25Aillustrate the pin assembly300a,300bpositioned within the cavity310,310′ of the end cap130, and in which the plunger304is at a first, extended position. As show, the spring body302is in a generally at an extended position against the cavity wall314, which may, for example, correspond to the spring body being minimally, if at all, compressed. Moreover, the portion of the spring body302in the vicinity of the cap bore324is generally adjacent to, if not abutting, the cavity wall314.

During installation of the fuse assembly102to the fuse cutout assembly100, such as, for example, when or while the end cap130is being inserted into the interior region128of the lower adapter122, as discussed above, the plunger304may be inwardly displaced to a second, retracted positioned, as shown, for example, inFIGS.24A and24B. Such displacement can involve inwardly displacing the first end160of the plunger158such that the first end160slightly outwardly protrudes from, if not flush or recessed within, the cap bore324. The force is applied to inwardly displace the plunger304along the cap bore324can be provided in a variety of different manners. For example, with respect to the embodiment shown inFIGS.24A and25B, the end cap130can include a chamfer326that extends from the second end154bof the end cap130to at least the cap bore324. Such a chamfer326may increase the portion of the plunger304that is outside of the cap bore324, thereby increasing the area of the plunger304that may be contacted or engaged by an installer. For example, such a chamfer326can increase the surface area of the plunger304that can be directly contacted by a digit or tool of an installer as the installer applied a force to retract the plunger304and thereby compress the spring body302.

Alternatively, as shown inFIGS.25A and25B, the installer may be able to engage an engagement body328, such as, for example button, tab, and/or ring, that can be coupled to the spring body302to a degree that can facilitate compression of the spring body302in a manner that causes the plunger304to be displaced to the second, retracted position. For example,FIGS.25A and25Bdepict an engagement body328in the form of a ring that is coupled, such as, for example, by a link330, to a portion of the spring body302that is generally adjacent to the plunger304. According to such an embodiment, the ring can have an aperture332that can receive placement of a digit or tool of the installer so as to assist the installer in securely engaging the ring as the installer provides a force in a direction generally away from the cap bore324, thereby compressing the spring body302and inwardly displacing the plunger304to the retracted position.

As shown inFIGS.24B and25B, when the plunger304is at the retracted position, the portion of the spring body302that is adjacent to the plunger304can be offset from the adjacent portions of the cavity wall314. Thus, when at such a position, the spring body302can be in a compressed state at which the degree of compression of the spring body302is larger than the degree of compression, if any, of the spring body302when the plunger304is at the first, extended position. According to certain embodiments, when at the second, retracted position, at least a portion of the plunger304remains within the cap bore324.

When the force used to compress the spring body302, and thus the force used to retract the plunger304to the second, retracted position, is subsequently released, such as, for example, upon release of the engagement body328, the spring force provided by the spring body302can bias the plunger304back to the first, extended position. Thus, as the spring body302is released from such compressive forces, the spring body302provides a biasing force that linearly displaces at least a portion of the plunger304through the cap bore324and to back to the first, extended position, as shown inFIGS.24A and25B.

FIGS.26-28illustrate various exemplary embodiments of methods for installing an adapter about a first end cap of a fuse assembly, wherein the first end cap and a second end cap of the fuse assembly each being an electrical contact that is electrically coupled to a fuse element that is housed within the fuse assembly.FIG.26illustrates a non-limiting exemplary flowchart according to some embodiments. The method400comprises inwardly displacing402a first end of a plunger from an extended position to a recessed position. In the extended position, the first end is positioned outside an outer surface of the first end cap. In the recessed position, the first end is in, or aligned with the outer surface of, the first end cap. The method400further comprises sliding404the adapter, while the plunger is at the recessed position, around at least a portion of the outer surface. In some embodiments, the sliding404step includes the adapter to comprise the first end cap entering an interior area of the adapter from a first end of the adapter, and wherein the notch is positioned around a second end, and not the first end, of the adapter. The method400further comprises aligning406a notch in the adapter with the plunger, with the adapter positioned around at least a portion of the outer surface.

FIG.27illustrates a non-limiting exemplary flowchart according to some embodiments. The method408comprises, all of the features shown in method400inFIG.26, and further comprises, in the aligning406step, detecting410insertion of at least a portion of the plunger into the notch. In some embodiments, the detecting410can follow the aligning406. In some embodiments, the detecting410and the aligning406can be cotemporaneous. In some embodiments, the aligning406can follow the detecting410.

FIG.28illustrates a non-limiting exemplary flowchart according to some embodiments. The method412includes all of the method400shown inFIG.26, and further comprises, after aligning406of the adapter, securing414the adapter to the first end cap and coupling, after securing, the adapter to a cutout assembly.

As used herein, the term “based on” is not exclusive and allows for being based on additional factors not described, unless the context clearly dictates otherwise. In addition, throughout the specification, the meaning of “a,” “an,” and “the” include plural references. The meaning of “in” includes “in” and “on.”

As used herein, the term “between” does not necessarily require being disposed directly next to other elements. Generally, this term means a configuration where something is sandwiched by two or more other things. At the same time, the term “between” can describe something that is directly next to two opposing things. Accordingly, in any one or more of the embodiments disclosed herein, a particular structural component being disposed between two other structural elements can be:disposed directly between both of the two other structural elements such that the particular structural component is in direct contact with both of the two other structural elements;disposed directly next to only one of the two other structural elements such that the particular structural component is in direct contact with only one of the two other structural elements;disposed indirectly next to only one of the two other structural elements such that the particular structural component is not in direct contact with only one of the two other structural elements, and there is another element which juxtaposes the particular structural component and the one of the two other structural elements;disposed indirectly between both of the two other structural elements such that the particular structural component is not in direct contact with both of the two other structural elements, and other features can be disposed therebetween; or any combination(s) thereof.

Aspects

Various Aspects are described below. It is to be understood that any one or more of the features recited in the following Aspect(s) can be combined with any one or more other Aspect(s).

Aspect 1. A fuse assembly comprising:a casing positioned between a first end cap and a second end cap of the fuse assembly, the first end cap and the second end cap each being an electrical contact that is electrically coupled to a fuse element, the fuse element being housed at least within an interior region of the casing; and a displaceable pin assembly, a least a portion of the displaceable pin assembly being secured within a cap bore of the first end cap,wherein the displaceable pin assembly comprises a plunger that is selectively displaceable along an axis that is non-parallel to a central longitudinal axis of the first end cap, the plunger being selectively displaceable between an extended position at which at least a first end of the plunger is outwardly positioned away from an outer surface of the first end cap, and a recessed position at which the first end of the plunger is recessed within the first end cap or is generally aligned with the outer surface of the first end cap.

Aspect 2. The fuse assembly of Aspect 1, wherein the cap is being non-parallel to the central longitudinal axis of the first end cap, the central longitudinal axis of the first end cap generally coinciding with a central longitudinal axis of the fuse assembly.

Aspect 3. The fuse assembly of any preceding Aspect(s), wherein the cap bore inwardly extends from the outer surface of the first end cap in a direction that is generally perpendicular to the central longitudinal axis of the first end cap.

Aspect 4. The fuse assembly of Aspect 3, wherein the cap bore extends through only one side of the first end cap.

Aspect 5. The fuse assembly of any preceding Aspect(s), wherein the cap bore is configured to retain at least a portion of the plunger within the cap bore at least when the plunger is at the extended position.

Aspect 6. The fuse assembly of any preceding Aspect(s), wherein the displaceable pin assembly further includes a support body securely positioned within the cap bore.

Aspect 7. The fuse assembly of Aspect 6, wherein at least a portion of the plunger is housed within an inner area of the support body.

Aspect 8. The fuse assembly of Aspect 7, wherein the support body is configured to retain at least a portion of the plunger within the inner area at least when the plunger is at the extended position.

Aspect 9. The fuse assembly of any one of Aspect(s) 6 to 8, wherein the support body threadlingly engages at least a portion of the cap bore.

Aspect 10. The fuse assembly of Aspect 6, wherein the cap bore extends between a first side and a second side of the first end cap, the plunger being positioned to pass through the first side of the first end cap as the plunger is displaced to the extended position.

Aspect 11. The fuse assembly of any preceding Aspect(s), wherein the displaceable pin assembly further includes a biasing element that biases the plunger toward one of the extended position and the recessed position.

Aspect 12. The fuse assembly of Aspect 11, wherein the plunger is biased to the extended position.

Aspect 13. A fuse cutout assembly comprising:a cutout body having a first contact, a second contact, and an insulator; an upper adapter configured for releasable coupling to the cutout body;a lower adapter configured to be pivotally coupled to the cutout body, the lower adapter having a notch in a wall of the lower adapter; anda fuse assembly comprising:a first end cap configured to be securely positioned within an interior area of the lower adapter;a second end cap configured to be securely attached to the upper adapter;a casing positioned between a first end cap and a second end cap, the first end cap and the second end cap each being an electrical contact that is electrically coupled to a fuse element, the fuse element being housed at least within an interior region of the casing; and a displaceable pin assembly, at least a portion of the displaceable pin assembly being secured within the first end cap, the displaceable pin assembly having a plunger that is selectively displaceable along an axis that is non-parallel to a central longitudinal axis of the fuse assembly, the plunger being selectively displaceable between an extended position at which at least a first end of the plunger is outwardly positioned away from an outer surface of the first end cap, and a recessed position at which the first end of the plunger is recessed within the first end cap or is generally aligned with the outer surface of the first end cap, the plunger being configured to be received in the notch of the lower adapter when the first end cap is positioned in the interior area of the lower adapter and the plunger is aligned with the notch and at the extended position,wherein the notch and the plunger are positioned to, when the plunger is received in the notch, orient the fuse assembly at a predetermined rotational and linear alignment relative to at least the lower adapter.

Aspect 14. The fuse cutout assembly of Aspect 13, wherein the displaceable pin assembly further includes a biasing element that biases the plunger toward one of the extended position and the recessed position.

Aspect 15. The fuse cutout assembly of any of Aspect(s) 13 or 14, wherein the displaceable pin assembly further includes a support body securely positioned within the first end cap.

Aspect 16. The fuse cutout assembly of any of Aspect(s) 13-15, wherein at least a portion of the displaceable pin assembly is positioned in a cap bore in the first end cap, the cap bore inwardly extending from, and through, at least a first side of the first end cap, and wherein the plunger is positioned to pass through the first side of the first end cap as the plunger is displaced to the extended position

Aspect 17. A method of installing an adapter about first end cap of a fuse assembly, the first end cap and a second end cap of the fuse assembly each being an electrical contact that is electrically coupled to a fuse element that is housed within the fuse assembly, the method comprising:inwardly displacing a first end of a plunger from an extended position at which the first end is positioned outside an outer surface of the first end cap to a recessed position at which the first end is in, or aligned with the outer surface of, the first end cap;sliding, while the plunger is at the recessed position, the adapter around at least a portion of the outer surface; andaligning, with the adapter positioned around at least a portion of the outer surface, a notch in the adapter with the plunger.

Aspect 18. The method of Aspect 17, wherein the step of aligning includes detecting insertion of at least a portion of the plunger into the notch.

Aspect 19. The method of Aspect 18, wherein the step of sliding the adapter comprises the first end cap entering an interior area of the adapter from a first end of the adapter, and wherein the notch is positioned around a second end, and not the first end, of the adapter.

Aspect 20. The method of Aspect 19, further comprising securing, after aligning of the adapter, the adapter to the first end cap and coupling, after securing, the adapter to a cutout assembly.

It is to be understood that changes may be made in detail, especially in matters of the construction materials employed and the shape, size, and arrangement of parts without departing from the scope of the present disclosure. This Specification and the embodiments described are examples, with the true scope and spirit of the disclosure being indicated by the claims that follow.