CA2095987A1 - Access extension fitting - Google Patents
Access extension fittingInfo
- Publication number
- CA2095987A1 CA2095987A1 CA 2095987 CA2095987A CA2095987A1 CA 2095987 A1 CA2095987 A1 CA 2095987A1 CA 2095987 CA2095987 CA 2095987 CA 2095987 A CA2095987 A CA 2095987A CA 2095987 A1 CA2095987 A1 CA 2095987A1
- Authority
- CA
- Canada
- Prior art keywords
- enclosure
- fitting
- conduit
- access extension
- hold
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Landscapes
- Installation Of Indoor Wiring (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
An access extension fitting for mounting on a conduit fitting provides more space for the conduit fitting permitting more splices, more connections for other conduit pipes and for mounting and supporting other electrical equipment. The access extension fitting has an enclosure with adjoining sides having bottom edges to fit over an opening in a conduit fitting. Gripping arrangement is supplied for co-operating with the attachment arrangement normally for holding a cover plate. The access extension fitting has at least one aperture in adjoining sides with a connection for a conduit, a top plate to fit over top edges of the adjoining sides and close the enclosure, and a holding arrangement to hold and seal the top plate to the top edges of the enclosure.
An access extension fitting for mounting on a conduit fitting provides more space for the conduit fitting permitting more splices, more connections for other conduit pipes and for mounting and supporting other electrical equipment. The access extension fitting has an enclosure with adjoining sides having bottom edges to fit over an opening in a conduit fitting. Gripping arrangement is supplied for co-operating with the attachment arrangement normally for holding a cover plate. The access extension fitting has at least one aperture in adjoining sides with a connection for a conduit, a top plate to fit over top edges of the adjoining sides and close the enclosure, and a holding arrangement to hold and seal the top plate to the top edges of the enclosure.
Description
2~a9~7 A CF S EXTENSIO~ITTING
The present invention relates to electrical conduit fittings and more specifically to an access extension fitting which may be attached to a conduit fitting to provide for connection of additional conduits.
Electrical conduit fittings together with conduits are generally made from plastic or metal such as aluminum, steel, or cast iron. The fittings are assembled on site into a conduit arrangement. Electrical wires are placed in the conduit arrangement and connected to form the desired electrical circuits. In most cases conduit fittings are provided where two or more conduits join. These fitting~ include pull through corners, pulling elbows~ different types of conduit fittings for both flexible cable and rigid conduits, splice boxes, and other types where two or more conduits JOin at the fitting or, alternatively, where splices are needed between the wires. In all of these cases there is a cover on the conduit fitting. The fitting has sufficient space therein for splicing wires, however, if there is a requirement to add an additional conduit connection to an existing cond~lit arrangement, then at the present time, it is necessary to change the fitting which requires disconnecting the electrical wires and replacing the fitting for a larger and more accessible one.
Electrical conduit arrangements are generally used in most commercial and industrial establishments, and also in hazardous locations. The conduit arrangement completely encases all the electrical wiring. ~ifferent sizes of conduit pipes are available which vary from one-half inch up to six inches in diameter. In the case of metal conduits, the conduit connections may be made to lugs on the fittings, either by screw threads or by clamping mechanisms. In the case of plastic conduits and fittings, the connections may be sliding fits wherein 209~987 conduit pipes slide into hubs on the fittings, adhesive cement is then used to seal the conduits to the fittings.
Screw in connections are also provided with plastic conduits and fittings.
S It is an aim of the pre~ent invention to provide an access extension fitting which may be mounted to a conduit fitting to provide more space so that more electrical wire splices may be made within the conduit fitting and also to provide an access extension fitting which has connections for other conduit pipes so that new electrical connections can be brought in and joined at an existing conduit fitting to increase the size of the conduit arrangement without having to remove any conduit fittings from the existing conduit arrangement. The access extension fitting may also be used for mounting and supporting other electrical equipment.
The present invention provides a system wherein an access extension fitting can be fitted to an existing conduit fitting and rewiring is carried out without having to remove the existing wiring system. 1t is not necessary to replace existing conduits and fittings.
The present invention provides an access extension fitting for mounting onto a conduit fitting having an opening with a removable cover plate seated thereon and attachment means to hold the cover plate to the conduit fitting, the access extension fitting comprising an enclosure with adjoining sides having bottom edges to fit over an opening in a conduit fitting, gripping means adjacent the bottom edges of the enclosure, for co-operating with attachment means for the conduit fittingto hold and seal the enclosure to the conduit fitting, at least one aperture in the adjoining sides with connection means for a conduit, top plate to fit over top edges of the adjoining sides and close the enclosure, and holding 209-)987 means to hold and seal the top plate to the top edge~ of the enclosure.
In drawings which illustrate embodiments of the present invention, Figure 1 is an isometric view of an access extension fitting according to one embodiment of the present invention for comhining with a conduit fitting, Figure 2 is a top view of the access extension fitting shown in Figure 1 with the top plate removed, Figure 3 is an elevational view, partly in section, showing the access extension fitting of Figure 1 combined with a known type of conduit outlet box, Figure 4 is an elevational view showing another embodiment of an access extension fitting combined with a pulling elbow.
Referring to Figures 1 and 2, the access extension fitting 10 has adjoining sides 11 which extend around to form an enclosure 12 having two substantially parallel sides with curved ends, an open top and an open bottom.
Two hubs 14 are shown extending in opposite directions from the opposing sides with apertures therein for connections to flexible or rigid conduits. Two further hubs 16, similar to hubs 14, are shown extending in opposite directions from each of the ends of the enclosure 12. The hubs 14,16 are shown threaded for connection to standard rigid conduits. The conduit connection does not form part of the present invention, and may be selected from many known and yet to be discovered connections. The conduit connection may be different to suit the particular conduit type connections required in conduit systems. For instance different connections may be supplied for a flexible conduit on one side and a rigid conduit on another side. Flexible conduits in one embodiment has an exterior threaded hub, an external clamp screw or a threaded cap to hold the , 2~9~987 conduit in posltion. In the case of a plastic conduit arrangement, then a sliding fit for a conduit pipe to ma~e into a hub is supplied and adhesive or plastic cement is used to join and seal the conduit to the hub.
At the bottom of the enclosure 12 are flat surface edges 18 adapted to mate with an opening in a conduit fitting. As seen in Figure 2, mounting plates 20 extend from opposing ends flush with the bottom edges 18 and have a slot 22 therein. The slot 22 is provided for a machine screw to grip the enclosure 12 and hold the enclosure to a conduit fitting. Tapped holes 24 in the mounting plates 20 are provided for ground connections.
Alternate lugs 26 on the opposing sides in the enclosure 12 are also provided with tapped holes 28 for alternate ground connections. Strengthening ribs 30 are shown extending for the full height of the sides 11 on the inside to provide additional strength to the enclosure 12.
A flat surface top edge 32 at the top of the enclosure 12 has threaded holes 34 at each end and a top plate 36 with a weatherproof seal 38 fits onto the top edge 32 with machine screws 40 holding the top plate 36 to the enclosure 12.
The bottom of the enclosure 12 is open and as shown in Figure 3, the bottom edges 18 are joined to the opening in a conduit fitting 44. A seal 46 is positioned on top of the opening in the conduit fitting 44, between the opening and the bottom edges 18 of the enclosure 12.
Standard conduit fittings have cover plates which are removed before the access extension fitting 10 is combined with the conduit fitting 44. The standard cover plate is removed and discarded. Set screws 48 which are normally provided to hold the standard cover plate over the opening in the conduit fitting pass through the slots 52~9a987 22 in the mounting plates 20 of the enclosLIre 12 and fit into existing tapped holes 50 in the conduit fitting 44.
Thus, as can be seen in Figure 3, when the access extension fitting 10 is combined with the conduit Eitting 44, the interior of the conduit fitting 44 is increased by the size of the access extension fitting 10 and this permits more space for splicing wires and also provides access for additional conduits through one or more of the lugs 14 and 16.
A pulling elbow 54 is shown in Figure 4. The opening in the pulling elbow 54 is smaller than that of the conduit fitting 44 shown in Figure 3, thus, the access extension fitting 10 is shorter and i.s adapted to combine with the opening in the pulling elbow 54. Slots 22 on the mounting plates 20 in the enclosure 12 provide for set screws in the tapped holes 50 to hold and seal the access extension fitting 10 to the pulling elbow 54.
Thus, the standard cover plate is first removed from the pulling elbow 54, and the access extension fitting 10 is combined with -the pulling elbow 54 in the same manner as that shown in Figure 3.
Whereas the access extension fitt.ing 10 is shown having four conduit connection lugs spaced at 90 apart around the enclosure 12, as will be understood, only one conduit connection lug may be provided. Alternatively, if four connection lugs are provided, then caps may be fitted into the connection lugs not required so they are blanked of:E. The height of the access extension fitting 10 is sufficient for a new conduit connection and has sufficient space to splice wires therein.
The seal 46 between the conduit fitting 44 and the access extension fitting lO and the seal 33 beneath the top plate 3~ of the access extension fitting 10 may be made of suitable material for all types of uses depending 2 0 ~
upon the particular requirements. E'or example, the fittings may be designed for weather proof, water proof or explosion proof standards. Different arrangements of access extension fittings may be made to suit different codes and for different environments, also to match different shapes and sizes of condui-t fittings.
The access extension fitting of the present invention allows all types of conduit fittings which have a cover plate to be changed from a standard existing conduit fitting to a splice box. This permits additional wires to be connected into the conduit system without having to make any changes to the conduit system itself other than removal of a cover plate and clamping on the access extension fitting to the existing holes or connections of a conduit fitting. Different shapes and sizes of access extension fittings are provided for different sizes and types of conduit fittings.
Various changes may he made to the embodiments shown herein without departing from the scope of the present invention which is limited only hy the following claims.
' ' .
The present invention relates to electrical conduit fittings and more specifically to an access extension fitting which may be attached to a conduit fitting to provide for connection of additional conduits.
Electrical conduit fittings together with conduits are generally made from plastic or metal such as aluminum, steel, or cast iron. The fittings are assembled on site into a conduit arrangement. Electrical wires are placed in the conduit arrangement and connected to form the desired electrical circuits. In most cases conduit fittings are provided where two or more conduits join. These fitting~ include pull through corners, pulling elbows~ different types of conduit fittings for both flexible cable and rigid conduits, splice boxes, and other types where two or more conduits JOin at the fitting or, alternatively, where splices are needed between the wires. In all of these cases there is a cover on the conduit fitting. The fitting has sufficient space therein for splicing wires, however, if there is a requirement to add an additional conduit connection to an existing cond~lit arrangement, then at the present time, it is necessary to change the fitting which requires disconnecting the electrical wires and replacing the fitting for a larger and more accessible one.
Electrical conduit arrangements are generally used in most commercial and industrial establishments, and also in hazardous locations. The conduit arrangement completely encases all the electrical wiring. ~ifferent sizes of conduit pipes are available which vary from one-half inch up to six inches in diameter. In the case of metal conduits, the conduit connections may be made to lugs on the fittings, either by screw threads or by clamping mechanisms. In the case of plastic conduits and fittings, the connections may be sliding fits wherein 209~987 conduit pipes slide into hubs on the fittings, adhesive cement is then used to seal the conduits to the fittings.
Screw in connections are also provided with plastic conduits and fittings.
S It is an aim of the pre~ent invention to provide an access extension fitting which may be mounted to a conduit fitting to provide more space so that more electrical wire splices may be made within the conduit fitting and also to provide an access extension fitting which has connections for other conduit pipes so that new electrical connections can be brought in and joined at an existing conduit fitting to increase the size of the conduit arrangement without having to remove any conduit fittings from the existing conduit arrangement. The access extension fitting may also be used for mounting and supporting other electrical equipment.
The present invention provides a system wherein an access extension fitting can be fitted to an existing conduit fitting and rewiring is carried out without having to remove the existing wiring system. 1t is not necessary to replace existing conduits and fittings.
The present invention provides an access extension fitting for mounting onto a conduit fitting having an opening with a removable cover plate seated thereon and attachment means to hold the cover plate to the conduit fitting, the access extension fitting comprising an enclosure with adjoining sides having bottom edges to fit over an opening in a conduit fitting, gripping means adjacent the bottom edges of the enclosure, for co-operating with attachment means for the conduit fittingto hold and seal the enclosure to the conduit fitting, at least one aperture in the adjoining sides with connection means for a conduit, top plate to fit over top edges of the adjoining sides and close the enclosure, and holding 209-)987 means to hold and seal the top plate to the top edge~ of the enclosure.
In drawings which illustrate embodiments of the present invention, Figure 1 is an isometric view of an access extension fitting according to one embodiment of the present invention for comhining with a conduit fitting, Figure 2 is a top view of the access extension fitting shown in Figure 1 with the top plate removed, Figure 3 is an elevational view, partly in section, showing the access extension fitting of Figure 1 combined with a known type of conduit outlet box, Figure 4 is an elevational view showing another embodiment of an access extension fitting combined with a pulling elbow.
Referring to Figures 1 and 2, the access extension fitting 10 has adjoining sides 11 which extend around to form an enclosure 12 having two substantially parallel sides with curved ends, an open top and an open bottom.
Two hubs 14 are shown extending in opposite directions from the opposing sides with apertures therein for connections to flexible or rigid conduits. Two further hubs 16, similar to hubs 14, are shown extending in opposite directions from each of the ends of the enclosure 12. The hubs 14,16 are shown threaded for connection to standard rigid conduits. The conduit connection does not form part of the present invention, and may be selected from many known and yet to be discovered connections. The conduit connection may be different to suit the particular conduit type connections required in conduit systems. For instance different connections may be supplied for a flexible conduit on one side and a rigid conduit on another side. Flexible conduits in one embodiment has an exterior threaded hub, an external clamp screw or a threaded cap to hold the , 2~9~987 conduit in posltion. In the case of a plastic conduit arrangement, then a sliding fit for a conduit pipe to ma~e into a hub is supplied and adhesive or plastic cement is used to join and seal the conduit to the hub.
At the bottom of the enclosure 12 are flat surface edges 18 adapted to mate with an opening in a conduit fitting. As seen in Figure 2, mounting plates 20 extend from opposing ends flush with the bottom edges 18 and have a slot 22 therein. The slot 22 is provided for a machine screw to grip the enclosure 12 and hold the enclosure to a conduit fitting. Tapped holes 24 in the mounting plates 20 are provided for ground connections.
Alternate lugs 26 on the opposing sides in the enclosure 12 are also provided with tapped holes 28 for alternate ground connections. Strengthening ribs 30 are shown extending for the full height of the sides 11 on the inside to provide additional strength to the enclosure 12.
A flat surface top edge 32 at the top of the enclosure 12 has threaded holes 34 at each end and a top plate 36 with a weatherproof seal 38 fits onto the top edge 32 with machine screws 40 holding the top plate 36 to the enclosure 12.
The bottom of the enclosure 12 is open and as shown in Figure 3, the bottom edges 18 are joined to the opening in a conduit fitting 44. A seal 46 is positioned on top of the opening in the conduit fitting 44, between the opening and the bottom edges 18 of the enclosure 12.
Standard conduit fittings have cover plates which are removed before the access extension fitting 10 is combined with the conduit fitting 44. The standard cover plate is removed and discarded. Set screws 48 which are normally provided to hold the standard cover plate over the opening in the conduit fitting pass through the slots 52~9a987 22 in the mounting plates 20 of the enclosLIre 12 and fit into existing tapped holes 50 in the conduit fitting 44.
Thus, as can be seen in Figure 3, when the access extension fitting 10 is combined with the conduit Eitting 44, the interior of the conduit fitting 44 is increased by the size of the access extension fitting 10 and this permits more space for splicing wires and also provides access for additional conduits through one or more of the lugs 14 and 16.
A pulling elbow 54 is shown in Figure 4. The opening in the pulling elbow 54 is smaller than that of the conduit fitting 44 shown in Figure 3, thus, the access extension fitting 10 is shorter and i.s adapted to combine with the opening in the pulling elbow 54. Slots 22 on the mounting plates 20 in the enclosure 12 provide for set screws in the tapped holes 50 to hold and seal the access extension fitting 10 to the pulling elbow 54.
Thus, the standard cover plate is first removed from the pulling elbow 54, and the access extension fitting 10 is combined with -the pulling elbow 54 in the same manner as that shown in Figure 3.
Whereas the access extension fitt.ing 10 is shown having four conduit connection lugs spaced at 90 apart around the enclosure 12, as will be understood, only one conduit connection lug may be provided. Alternatively, if four connection lugs are provided, then caps may be fitted into the connection lugs not required so they are blanked of:E. The height of the access extension fitting 10 is sufficient for a new conduit connection and has sufficient space to splice wires therein.
The seal 46 between the conduit fitting 44 and the access extension fitting lO and the seal 33 beneath the top plate 3~ of the access extension fitting 10 may be made of suitable material for all types of uses depending 2 0 ~
upon the particular requirements. E'or example, the fittings may be designed for weather proof, water proof or explosion proof standards. Different arrangements of access extension fittings may be made to suit different codes and for different environments, also to match different shapes and sizes of condui-t fittings.
The access extension fitting of the present invention allows all types of conduit fittings which have a cover plate to be changed from a standard existing conduit fitting to a splice box. This permits additional wires to be connected into the conduit system without having to make any changes to the conduit system itself other than removal of a cover plate and clamping on the access extension fitting to the existing holes or connections of a conduit fitting. Different shapes and sizes of access extension fittings are provided for different sizes and types of conduit fittings.
Various changes may he made to the embodiments shown herein without departing from the scope of the present invention which is limited only hy the following claims.
' ' .
Claims (9)
1. An access extension fitting for mounting onto a conduit fitting having an opening with a removable cover plate seated thereon, and attachment means to hold the cover plate to the conduit fitting, the access extension fitting comprising:
an enclosure with adjoining sides having bottom edges to fit over an opening in a conduit fitting, gripping means adjacent the bottom edges of the enclosure, for co-operating with attachment means on the conduit fitting to hold and seal the enclosure to the conduit fitting, at least one aperture in the adjoining sides with connection means for a conduit, top plate to fit over top edges of the adjoining sides and close the enclosure, and holding means to hold and seal the top plate to the top edges of the enclosure.
an enclosure with adjoining sides having bottom edges to fit over an opening in a conduit fitting, gripping means adjacent the bottom edges of the enclosure, for co-operating with attachment means on the conduit fitting to hold and seal the enclosure to the conduit fitting, at least one aperture in the adjoining sides with connection means for a conduit, top plate to fit over top edges of the adjoining sides and close the enclosure, and holding means to hold and seal the top plate to the top edges of the enclosure.
2. The access extension fitting according to claim 1 wherein the gripping means comprises slots in mounting plates extending from the bottom edges of the enclosure, the slots adapted to permit set screw attachment means to fit into an adjacent opening in a conduit fitting to hold and seal the enclosure to the conduit fitting.
3. The access extension fitting according to claim 1 wherein the gripping means comprises flanges extending from the bottom edges of the enclosure and clamping means to hold and seal the flanges of the enclosure to the conduit fitting.
4. The access extension fitting according to claim 1 wherein the gripping means is within the enclosure and comprises slots in mounting plates extending from opposing ends of the bottom edges of the enclosure, the slots adapted to permit set screws fitting into threaded holes adjacent an opening in a conduit fitting to hold and seal the enclosure to the conduit fitting.
5. The access extension fitting according to claim 1 including a sealing means positioned on the bottom edges of the enclosure for sealing the enclosure to the conduit fitting.
6. The access extension fitting according to claim 1 wherein the enclosure has opposing sides and ends to match the conduit fitting.
7. The access extension fitting according to claim 1 wherein four apertures are provided, approximately 90°
apart in the adjoining walls, each aperture having connection means for a conduit.
apart in the adjoining walls, each aperture having connection means for a conduit.
8. The access extension fitting according to claim 1 including at least one ground connector means within the enclosure adapted to accomplish ground bonding.
9. The access extensive fitting according to claim 1 including sealing means between the top plate and the top edges of the adjoining sides of the enclosure.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US88240692A | 1992-05-13 | 1992-05-13 | |
| US07/882,406 | 1992-05-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2095987A1 true CA2095987A1 (en) | 1993-11-14 |
Family
ID=25380509
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2095987 Abandoned CA2095987A1 (en) | 1992-05-13 | 1993-05-11 | Access extension fitting |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2095987A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112751308A (en) * | 2021-01-22 | 2021-05-04 | 广东安诺新材料科技有限公司 | Explosion-proof housing for cable |
-
1993
- 1993-05-11 CA CA 2095987 patent/CA2095987A1/en not_active Abandoned
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112751308A (en) * | 2021-01-22 | 2021-05-04 | 广东安诺新材料科技有限公司 | Explosion-proof housing for cable |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US3003794A (en) | Lay-in wireway structure or the like | |
| US4163572A (en) | Transition fitting | |
| US4295005A (en) | Cable splice closure | |
| CA2291197C (en) | Single and dual cable seal system | |
| US5663525A (en) | Electrical meter box for service lateral and method of using same | |
| EP0898106B1 (en) | A sealing arrangement relating to cable and pipe transits | |
| US5704400A (en) | Electrical conduit assembly | |
| US4936478A (en) | Universal conduit fitting | |
| US5939669A (en) | Underground container | |
| BG100917A (en) | Junction box for low profile raised panel flooring | |
| US5013872A (en) | Cable clamp | |
| NO303158B1 (en) | Junction box | |
| US3281005A (en) | Surface metal raceway fittings | |
| SK56795A3 (en) | Cable feedthrough | |
| US5735711A (en) | Cable connector | |
| USRE35075E (en) | Extension for electrical junction box | |
| GB2420916A (en) | Sealed junction for trunking. | |
| US6333464B1 (en) | Electric wire splice connector | |
| US5973264A (en) | Modular electrical service riser with retractable conduit | |
| US5169013A (en) | Electrical condulet extension box | |
| US6737575B2 (en) | Conduit body adapter module | |
| US5635673A (en) | Cable jointing enclosure | |
| CA2095987A1 (en) | Access extension fitting | |
| US4859812A (en) | Flat cable and sealing element | |
| US4924038A (en) | Flat cable sealing element |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Dead |