The invention of this application relates to the construction industry and the mounting of electrical wiring and other conduits to a structure. More particularly, to a clip system that can be used in connection with flexible armored electrical cable of all varieties (including or MC cable) and other conduits herein after all referred to as conduits.
The present invention relates to electrical wiring other conduits and, more particularly, for a clip system for securing these conduit to a structural component of a facility. Coleman et al U.S. Pat. No. 5,189,719 discloses a rectangular flexible armored cable; Falciglia et al RE38,345 discloses a round flexible armored cable; and Dollins et al. U.S. Pat. No. 6,825,418 discloses a coded flexible armored cable. These patents are incorporated by reference herein as background information illustrating flexible armored cables including MC style cables. Temblador U.S. Pat. No. 6,486,395 discloses a flexible armored cable with a special wiring configuration to illustrate that the invention of this application can be used in connection with all flexible armored cable, regardless of the wire gauge and/or wire configuration in the flexible armored cable, and is also incorporated by reference herein as background information.
The present invention is particularly applicable for use in connection with commercial installation of electrical wiring and, thus, will be discussed with respect to commercial applications. However, the invention of this application is not to be limited to commercial applications and/or wiring. In this respect, many commercial applications require some form of protection of the electrical wiring in a facility. For many years, electricians ran wire through rigid pipes. Now, with the development of flexible armored cable, rigid pipes are not needed. As can be appreciated, this eliminates the step of hanging rigid pipe and pulling the wire through the pipe. Further, since the armor is flexible, it can be easily manipulated around obstacles without jeopardizing the insulated qualities of the wire.
It is, of course, also well known that the electrical wiring in any facility must be insulated and secured to the structure in such a way that the electrical current is controlled and prevented from harming people and property. That is why virtually all electrical wiring sold includes some form of insulation. This can include the thin insulation surrounding the wire core and an outer layer of insulation surrounding the wire insulation. In some cases, the outer layer is made from a material similar to the wire insulation, such as a polymeric material. The wiring can also include a hard outer layer to further protect the wire. For the invention of this application, the wire includes a flexible armored outer layer to protect the wire. While the flexible armored layer, as is described in the above referenced patents, is typically made from a metallic material in today's electrical industry, it should be appreciated that the invention of this application could also be used in connection with non-metal flexible armored cables and other cables that could be used or will be used in the electrical industry.
While it has been found that flexible armored cables provide an efficient and effective means for wiring a facility with a protected electrical wire, the flexible armored cable must still be secured to the structure of the facility to be wired. This includes mounting the flexible armored cable to the studs in the facility, which could be wooden studs, but are typically metal studs in today's commercial construction projects. The mounting also includes mounting the flexible armored cable to ceiling structures and other structures. As can be appreciated, especially with commercial construction, the ceiling can be very high, wherein it is best to utilize mechanisms that are quick and easy to use, to minimize the time and expense of wiring a facility. Further, as can also be appreciated, mounting structures that only require one hand to use can be very beneficial since the other hand can be utilized to guide the cable and/or to maintain one's balance. Likewise, it is also time consuming and costly to install other forms of conduit.
Prior art clips have been created to help secure conduit to the facility; however, these clips are difficult to use, require tools and both hands. In addition, these prior art clips are costly.
In accordance with the present invention, provided is a clips system including a clip and/or a panel strap for flexible armored cable and other conduits. More particularly, provided is a clip that is easily securable to a building's structural components and is configured to allow the conduit to be easily and quickly secured to the clip.
In this respect, a clip according to the present invention is for use with a conduit to secure the conduit to a structural object. The conduit has a central conduit axis and an outer armored layer extending about the conduit axis wherein the outer layer is formed from alternating crowns and troughs helically wound about the conduit axis such that the crowns and troughs are not perpendicular to the conduit axis. The clip, according to one aspect of the present invention, includes a longitudinally extending base with a bottom portion for engaging the structural object. The clip further includes a first end and a second end longitudinally spaced from the first end and a first side wall extending upwardly from the base between the first and second base ends. The first side wall includes a first inwardly extending surface forming a first portion of a longitudinally extending conduit cavity wherein the first portion has a first upper edge. The clip further includes a second side wall extending upwardly from the base between the first and second base ends and has a second inwardly extending surface forming a second portion of the conduit cavity. The second portion faces the first portion and has a second upper edge spaced from the first upper edge thereby forming a longitudinally extending entry gap for receiving the conduit that is opposite to the base. These first and second side walls are also bendable between a relaxed condition when the conduit is not positioned in the cavity and an engaged condition when the conduit is positioned in the cavity such that the conduit extends longitudinally through the cavity. The conduit cavity has a generally oval cross-sectional configuration when in the relaxed condition with a height between the bottom extent of the cavity and the entry gap and a width between the first and second inwardly extending surfaces wherein the height is greater than the width when in the relaxed condition. The clip can further including at least one transverse rib in the cavity configured to at least partially enter a trough in the conduit when the clip is in the engaged condition.
In accordance with another aspect of the present invention, provided is a clip for securing a conduit to a structural object which includes a longitudinally extending clip body having a generally C-shaped wire receiving cavity extending in the longitudinal direction and about the cavity axis with a longitudinally extending conduit receiving slot. The wire receiving cavity has a plurality of transverse ribs that are parallel to one another and each of these ribs has a first end and a second end that are circumferentially space about the cavity axis and which are longitudinally spaced. These ribs are configured to extend into a portion of a trough in the conduit.
The foregoing and more, will, in part, be obvious and, in part, be pointed out more fully hereinafter, in connection with a written description of preferred embodiments of the present invention illustrated in the accompanying drawings in which:
Referring now in greater detail to the drawings, wherein the showings are for the purpose of illustrating preferred embodiments of the invention only, and not for the purpose of limiting the invention
Clip 10 further includes a conduit receiving cavity 30 that is oval or C-shaped which can extend from end 14 to end 16, but can be shorter. Cavity 30 is shaped to receive a section of an armored conduit or MC-cable C to secure conduit C to the clip such that the clip can be used to support the conduit on a structural object such as on a stud S. Cavity 30 extends circumferentially about a cavity axis 32. Cavity 30 is formed at least in part by inner surfaces 40 and 42 of walls 20 and 22, respectively. Inner surface portions 40 & 42 can be joined to one another or can be connected by a base surface portion 44 near base 12. Further, cavity 12 can be a smooth arcuate cavity or can be polygonal such that it is still generally C-shaped. As can be appreciated, and for example only, surface portion 40 or 42 could be formed by a plurality of non-parallel flat surface portions producing a polygonal cross-sectional configuration or could be formed by a unified arcuate surface without detracting from the invention of this application.
Again, cavity 30 extends longitudinally in direction 18 and is shown to extend between cavity ends 50 and 52. Cavity 30 extends circumferentially between top edges 54 and 56. While cavity 30 is shown to be continuous, cavity 30 does not need to be continuous and could include gaps, mounting arrangements etc. including, but not limited to, a central mounting hole (not shown) in the cavity to secure the clip to a structural object which will be discussed in greater detail below.
Top edges 54 and 56 at least in part form the edges of a top opening 60 sized to allow the conduit to enter cavity 30 with resistance. As can be appreciated, the size of this opening is dependent on the size of the conduit to be inserted. This opening can be a wide range of sizes and in one embodiment, the opening is between 0.23 inches and 0.33 inches and preferable around 0.28 inches when in a relaxed condition 62, as is shown in the several figures including
As is discussed above, the conduit can include a central conduit axis A wherein several wires extend generally parallel to this conduit axis. These conduits can be cables that can include three to five wires and as is shown, conduit C includes three wires W1, W2 and W3. Further, these wires can be different gauges. As a result, while many MC cables are standards, there could be different sizes of conduit and, therefore, different clip sizes. Further, the clip can be configured to work in connection with a number of differently sized MC cables and/or conduits which can require greater flexibility in design and/or materials. The wire are maintained within an outer armored layer OL extending about the conduit axis wherein the outer layer is formed from alternating crowns CR and troughs TR that can be helically wound about the conduit axis such that the crowns and troughs are not perpendicular to the conduit axis.
In order to meet some building codes, fastening devices, such as the clip of this application, need to secure the conduit such that it can withstand a given pulling load or pull test. In this respect, the clip must withstand an axial pulling load such that the conduit does not slip axial relative to the clip. In order to increase the pulling resistance of the clip, clip 10 can include a rib arrangement on the inner surfaces. In this respect, in one embodiment, clip 10 includes ribs 80-84. However, while five ribs are shown, more or less ribs could be utilized without detracting from the invention of this application. Further, the ribs can have more than one configuration and each rib does not need to be identical. In one embodiment, the ribs extend from near edge 54 to near edge 56 such that the ribs extend about a substantial portion of cavity 30. Further, as is best shown in
These ribs secure conduit longitudinally while the C-shape of the clip maintain the conduit axially. As can be appreciated, the use of ribs in the central portion of the clip requires the sides of the C-shaped portion to flex axially outwardly before the conduit can move substantially longitudinally along the conduit axis. This creates significant pull resistance by the clip without the need for complicated and/or difficult to engage mechanisms. In this respect, prior art clips require the end user to use a tool, either a screw driver or a pair of pliers, to properly secure the clip from movement in the longitudinal direction.
As can be appreciated, the longitudinal thickness of the rib or ribs can vary and can influence the desired angle of the rib. In this respect, thicker ribs should be configured more closely to the angle of the recess in the conduit while thinner ribs can have a rib angle that varies more from the actual angle of the recess in MC cables. As can be also appreciated, thinner ribs can also be used for clips designed for differently sized conduits or conduits produced by different manufacturers which have different ranges of tolerance.
The cross-sectional configuration of the ribs can be polygonal, such as the ribs shown or can be other configurations. Again, at least in part, the ribs' cross-sectional configuration is based on the configuration of the recesses in the MC cable. However, other cross-sectional configurations could also be used. As will be discussed in greater detail below, the clip can include in inner surface or surfaces that do not include these ribs.
The clip according to another aspect of the present invention can also include clip-opening flanges 86 and 88 near edges 54 and 56 respectively. These flanges can be used to create a ramp-like effect for the conduit to make it easier to force the conduit into the clip. As is discussed above, it is desirous that that conduit can be positioned in the clip with the use of only one hand. Further, it is also desired that the clip securely engage the conduit. These lead in tapers or clip-opening flanges on the open side of the C-shaped portion allow the clip to be opened by merely pushing the conduit axially against the open side of the C-shaped portion. The conduit will drive the sides of the C-shaped section away from each other until the conduit enters the clip, and then the walls will return toward their natural state. As can be appreciated, the walls may not reach their natural state when they reach the engaged condition which can be used to increase the gripping force on the conduit.
With reference to
With reference to
As is shown in
The strap embodiment of this application can have a number of configurations. As is shown in
The strap can be made from any material known in the art. This can include, but is not limited to, a metal or a plastic material, such as a non-destructive polymer plastic with fire retardant qualities having a non toxic burn.
In yet another embodiment, the fastening arrangement for the straps and/or the clip themselves can be configured to allow partial or full rotation of the clip about a desired axis. In this respect, the fastening arrangement used for the clip and/or the strap can allow the clip to rotate about an axis extending upwardly from the base of clip to allow the clip and the conduit to rotate about an axis transverse to the wire axis. This can provide a clip that is easily rotatable or positionable to allow easy adjustment. Essentially, the rotation is based on the direction that the conduit is being laid and the position of the next clip, and the rotation can be initiated by a tug on the conduit near the next clip. For example, if the conduit is being positioned near a corner or bend in the electrical line, it can be advantageous for the clip, based on the angle the end user pulls on the conduit, to automatically rotate a desired amount while maintaining the conduit securely at the point of attachment to the clip. Further, this rotation can be achieved when the end user is working on the next clip without the need to go back to the previous clip. As is discussed in greater detail above, the ribs within the C-shaped portion prevent the conduit from pulling longitudinally out of the clip during the rotational adjustment of the clip.
In a further embodiment, the rotatable clip could also include a second mounting arrangement including, but not limited to, a second mounting hole (not shown), to lock the clip relative to the stud to prevent rotation after the job is completed. As can be appreciated, this second mounting or securing hole can be spaced from the conduit axis or the clip axis so that it can be accessed when the conduit is in the engaged condition.
As is shown in
Shown in
With reference to clip 10a, the clip can be oriented such that corner 106 is positioned in or near channel end CE2 wherein corner cut 100 of flange 92 is adjacent to inner edge IE1 to allow flange 92 to clear channel end CE1. As corner cut 100 clears channel end CE1, a clip bottom surface 109 can be urged against base plate BP. Once in this position, clip 10a can then be twisted clockwise relative to panel strap PS until flanges 92 and 102 snap into channels CE1 and CE2, respectively, as is shown with clip 10b. More particularly, as the clip is twisted, corner 107 of flange 92 and corner 106 of flange 102 engage side walls SW1 and SW2, respectively, such that the clips snaps into engagement with the channels and the clip is held in place relative to the strap. As is discussed in this application, the clips of this application can be used for a wide range of conduits and sizes of conduits including a variety of electrical and even a variety of non-electrical conduits. Accordingly, and as can be appreciated, more than one type and/or size of clip can be used with a single size of panel strap. This allows a single panel strap to be connected to a structural portion, such as a stud, and a range of clips to be attached to this single strap.
In yet another embodiment, the clip can be configured such that another portion of the clip, such as edge 52, engages channel edge IE2 to create the engagement between the clip and the panel strap. In even yet another embodiment, the clip and the panel strap can be configured to produce a resistance fit between the clip and the panel strap such that the clip cannot be easily moved relative to the strap once it is snapped into place. In a further embodiment, the channels of the strap can have non-parallel portions. In this respect, channels CE1 and CE2 can include a downwardly extending portion such as a downwardly extending channel end to engage the clip.
As can be appreciated, clips 10a and/or 10b could also be reversed such that they are oriented with flanges 92 and 102 locked into channels CE2 and CE1, respectively. Once locked in place, clip 10 can be secured relative to the panel strap. By utilizing panel strap PS, one or even several clips can be quickly positioned and secured at a given location such as near an electrical panel (not shown).
In even yet another embodiment, the configuration of the clips according to the present invention can also be modified to matingly engage with mounting devices known in the industry or mounting devices which will be used in the industry.
With reference to
Clip 200 further includes a conduit receiving cavity 230 that is oval or C-shaped which can extend from end 214 to end 216, but can be shorter. Cavity 230 is shaped to receive a section of an armored conduit or MC-cable C to secure conduit C to the clip such that the clip can be used to support the conduit on a structural object such as on stud S. Cavity 230 extends circumferentially about a cavity axis 232. Cavity 230 is formed at least in part by inner surfaces 240 and 242 of walls 220 and 222, respectively. As with other embodiments, inner surface portions 240 & 242 can be joined to one another or can be connected by a base surface portion 244 near base 212. Further, cavity 230 can be a smooth arcuate cavity or can be polygonal such that it is still generally C-shaped. As can be appreciated, and for example only, surface portion 240 or 242 could be formed by a plurality of non-parallel flat surface portions producing a polygonal cross-sectional configuration or could be formed by a unified arcuate surface without detracting from the invention of this application.
Again, cavity 230 extends longitudinally in direction 218 and is shown to extend between cavity ends 250 and 252. Cavity 230 extends circumferentially between top inwardly facing barbs 254 and 256. While cavity 230 is shown to be continuous, cavity 230 does not need to be continuous and could include gaps, mounting arrangements etc. including, but not limited to, a central mounting hole (not shown) in the cavity to secure the clip to a structural object which will be discussed in greater detail below.
Barbs 254 and 256 can at least in part form the edges of a top opening 260 sized to allow the conduit to enter cavity 230 with resistance. As can be appreciated, the size of this opening is dependent on the size of the conduit to be inserted. This opening can be a wide range of sizes and in one embodiment, the opening that is sized based on the size of the conduit to be secured when in a relaxed condition 262. However, clip 200 is made from a material that can flex such that when the conduit is inserted into cavity 230, barbs 254 and 256 move away from one another based on the insertion force of the conduit which will temporarily enlarge opening 260 and cavity 230. This allows the conduit to be pressed into the clip. Once the conduit is moved through opening 260 and positioned in cavity 230, the clip moves inwardly around the conduit and automatically positions itself into an engaged condition 264, as is shown in
As with the other embodiments, clip 200 can be configured to be used in connection with a wide range of mounting arrangements. In this respect, clip 200 can utilize any of a number of mounting holes including, but not limited to, a mounting hole 290 on an axially extending flange 292 that is offset from the C-shaped portion of the clip. This mounting hole can also be configured to receive any fastener known in the art including, but not limited to, rivets, pop rivets, threaded fasteners and self locking or one-way style fasteners. Further, mounting hole 290 can have a countersunk portion. This can include further include any other mounting arrangement discussed in this application. This includes, but is not limited to, being configured to be used in connection with stud straps 110 as are discussed above. Clip 200 can also be configured to allow partial or full rotation of the clip about a desired axis as is discussed above. Yet even further, clip can be used in combination with panel strap PS discussed above. In this respect, clip 200 can further include a corner cut 300 in flange 292 and a back side flange 302 wherein flanges 292 and 302 have a thickness 297 and 298, respectively, that are less the thickness of the gaps in the channel ends such that the flanges can enter these gaps. As is discussed in greater detail above, this configuration can be used to lockingly secure clip 200 to panel strap PS.
In even yet another embodiment, the configuration of the clips according to the present invention can also be modified to matingly engage with mounting devices known in the industry or mounting devices which will be used in the industry.
The clip of this application can have many configurations or modification without detracting from the invention of this application. For example, the flanges, such as flange 92, can have many different configurations including the four sided polygonal configuration described with respect to one of the embodiments above, a rectangular configuration, a semi-circular configuration or even combinations thereof. As discussed above, these configurations can be used for a mounting hole, such as mounting hole 90, and/or can be used for the mating engagement with other object such as the use of flanges 92 and 102 to engage a panel strap. Further, this configuration can be based on manufacturing techniques to simplify the manufacturing process such as configurations that allow the clip to be extruded.
The material used for the clip can be any known material in the art including, but not limited to, a plastic clip material that is flexible with memory such as a non destructive polymer plastic with fire retardant qualities that is non toxic.
While considerable emphasis has been placed on the preferred embodiments of the invention illustrated and described herein, it will be appreciated that other embodiments and/or equivalents thereof can be made and that many changes can be made in the preferred embodiments without departing from the principals of the invention. Accordingly, it is to be distinctly understood that the foregoing descriptive matter is to be interpreted merely as illustrative of the invention and not as a limitation.
This application is a continuation of U.S. application Ser. No. 12/069,780, filed Feb. 13, 2008, which application is a continuation-in-part of U.S. patent application Ser. No. 11/450,119 filed on Jun. 9, 2006 which application claims priority in U.S. provisional application Ser. No. 60/688,954, filed Jun. 9, 2005, entitled “CLIP” and U.S. provisional application Ser. No. 60/759,715, filed Jan. 18, 2006, all of which are incorporated by reference herein.
Number | Date | Country | |
---|---|---|---|
60688954 | Jun 2005 | US | |
60759715 | Jan 2006 | US |
Number | Date | Country | |
---|---|---|---|
Parent | 12069780 | Feb 2008 | US |
Child | 12572283 | US |
Number | Date | Country | |
---|---|---|---|
Parent | 11450119 | Jun 2006 | US |
Child | 12069780 | US |