CA1192294A - Fastener for attaching electrical boxes to steel studs - Google Patents
Fastener for attaching electrical boxes to steel studsInfo
- Publication number
- CA1192294A CA1192294A CA000411619A CA411619A CA1192294A CA 1192294 A CA1192294 A CA 1192294A CA 000411619 A CA000411619 A CA 000411619A CA 411619 A CA411619 A CA 411619A CA 1192294 A CA1192294 A CA 1192294A
- Authority
- CA
- Canada
- Prior art keywords
- electrical box
- attachment portion
- fastener
- flange
- sheetmetal
- 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.)
- Expired
Links
- 229910000831 Steel Inorganic materials 0.000 title abstract description 4
- 239000010959 steel Substances 0.000 title abstract description 4
- 239000002184 metal Substances 0.000 claims abstract description 35
- 238000010276 construction Methods 0.000 description 3
- 238000007792 addition Methods 0.000 description 1
- 230000002860 competitive effect Effects 0.000 description 1
- 239000000789 fastener Substances 0.000 description 1
- 238000009432 framing Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000000638 solvent extraction Methods 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Landscapes
- Connection Or Junction Boxes (AREA)
Abstract
UNITED STATES PATENT AND TRADEMARK OFFICE
Title: Fastener For Attaching Electrical Boxes To Steel Studs Inventor: Jay J. Bolante ABSTRACT
A stamped, sheetmetal fastener for attaching elec-trical boxes or the like to steel studs or the like includes a first portion designed for attachment to an electrical box and a second portion designed for attachment to one of the flanges of a metal stud.
The electrical box attachment portion comprises a wide and flat strip of sheetmetal with its midpor-tions struck out so as to form a leg parallel there-to that has teeth thereon for gripping the electrical box. The flat strip and its parallel leg together slip snugly over the edge of an electrical box side wall, and the teeth on the leg bite into that side-wall to create a semi-permanent connection therewith.
The metal stud attachment portion includes a pair of widely spaced appendages or fingers formed to fit over the inwardly turned lip at the outermost end of the stud flange, and also a third arm-like appendage between the widely spaced pair of fingers which acts in concert therewith so as to grip and push against the outer flange extremities to thereby lock the fastener, and thus the electrical box, to the metal stud.
Title: Fastener For Attaching Electrical Boxes To Steel Studs Inventor: Jay J. Bolante ABSTRACT
A stamped, sheetmetal fastener for attaching elec-trical boxes or the like to steel studs or the like includes a first portion designed for attachment to an electrical box and a second portion designed for attachment to one of the flanges of a metal stud.
The electrical box attachment portion comprises a wide and flat strip of sheetmetal with its midpor-tions struck out so as to form a leg parallel there-to that has teeth thereon for gripping the electrical box. The flat strip and its parallel leg together slip snugly over the edge of an electrical box side wall, and the teeth on the leg bite into that side-wall to create a semi-permanent connection therewith.
The metal stud attachment portion includes a pair of widely spaced appendages or fingers formed to fit over the inwardly turned lip at the outermost end of the stud flange, and also a third arm-like appendage between the widely spaced pair of fingers which acts in concert therewith so as to grip and push against the outer flange extremities to thereby lock the fastener, and thus the electrical box, to the metal stud.
Description
2~ ~
BACKGROUND AND SU~MARY OF THE INVENTION
This invention relates broadly to a fastening device for securing objects to metal channels or studs, and more particularly to a sheetmetal fastener or clip for securing an electrical box to a metal stud.
In new construction, electrical junction boxes have ~raditionally been secured to wall framing (usually to wooden studs) before the wall is plastered or before the drywall or wallboard is fastened in place. The known means by which electrical boxes are fastened to wooden studs usually involve either the use of nails or the use of nail-like projections formed integrally with the electrical boxes, box brackets or box hangers.
Metal studs began gaining prominence in the construc-tion industry a~ter World War II. Originally they were used largely for room partitioning. Their use expanded as the cost of metal studs became competitive with those of wood. Unfortunately, the use of a sheetmetal stud in place of a wooden stud prevents the use of nails or nail-like fasteners.
At this time there are a number of patented and unpatented clips or fasteners commercially available for the purpose of attaching electrical boxes to metal studs. Usually they attach to the metal stud by grlpp-ing it under pressure supplied by their o~n spring-temper steel appendages. ~o~iever, some cannot be universally used on all electrical bo,:es or Oil all sizes of metal studs. Others are flim~ nile ye~
others are difficult to install.
z~
Acc~rdin~ to one aspect of -the present invention there is provided an improved fastener for at-tachiny an electrical box to a formed sheetmetal member, the member including a flange with a lip turned generally a-t a right angle thereto and terrninating in an edge. The fas-tener which attaches only to the flange and lip includes a piece oE formed metal haviny an elec-trical box a-ttachmen-t por-tion and a sheetmetal member attached portion. An electrical box attachment portion includes means for securely affixing the fastener to the electrical box. The sheetmetal member attachment portion is spaced from the electrical box attachment portion and has at least one finger extending therefrom designed to fit over the lip and part of the flange. The sheetmetal member attachment portion also has pressure application means extending therefrom in the form of an elongate and resilient appendage having midportions that push against the edge in an outward direction so as to drive the finger into compressive contact with the flange and lip to thereby lock the fastener thereto.
According to one aspect of the invention, the midportions include at least two longitudinally spaced locking stops extending outwardly therefrom, one of which engages the lip edye for preventing slipping between the appendage and the lip.
According to another aspect of the invention, the fastener is provided for use in rigidly attaching a sheetmetal electrical box to a sheetmetal stud of generally channel shape. The stud includes a pair of parallel flanges, each having an inner extremity and an outer extremity, the inner extremities of the two flanges being connected by a web lying generally at right angles thereto, and the outer extremities of each flange having a short lip portion turned
BACKGROUND AND SU~MARY OF THE INVENTION
This invention relates broadly to a fastening device for securing objects to metal channels or studs, and more particularly to a sheetmetal fastener or clip for securing an electrical box to a metal stud.
In new construction, electrical junction boxes have ~raditionally been secured to wall framing (usually to wooden studs) before the wall is plastered or before the drywall or wallboard is fastened in place. The known means by which electrical boxes are fastened to wooden studs usually involve either the use of nails or the use of nail-like projections formed integrally with the electrical boxes, box brackets or box hangers.
Metal studs began gaining prominence in the construc-tion industry a~ter World War II. Originally they were used largely for room partitioning. Their use expanded as the cost of metal studs became competitive with those of wood. Unfortunately, the use of a sheetmetal stud in place of a wooden stud prevents the use of nails or nail-like fasteners.
At this time there are a number of patented and unpatented clips or fasteners commercially available for the purpose of attaching electrical boxes to metal studs. Usually they attach to the metal stud by grlpp-ing it under pressure supplied by their o~n spring-temper steel appendages. ~o~iever, some cannot be universally used on all electrical bo,:es or Oil all sizes of metal studs. Others are flim~ nile ye~
others are difficult to install.
z~
Acc~rdin~ to one aspect of -the present invention there is provided an improved fastener for at-tachiny an electrical box to a formed sheetmetal member, the member including a flange with a lip turned generally a-t a right angle thereto and terrninating in an edge. The fas-tener which attaches only to the flange and lip includes a piece oE formed metal haviny an elec-trical box a-ttachmen-t por-tion and a sheetmetal member attached portion. An electrical box attachment portion includes means for securely affixing the fastener to the electrical box. The sheetmetal member attachment portion is spaced from the electrical box attachment portion and has at least one finger extending therefrom designed to fit over the lip and part of the flange. The sheetmetal member attachment portion also has pressure application means extending therefrom in the form of an elongate and resilient appendage having midportions that push against the edge in an outward direction so as to drive the finger into compressive contact with the flange and lip to thereby lock the fastener thereto.
According to one aspect of the invention, the midportions include at least two longitudinally spaced locking stops extending outwardly therefrom, one of which engages the lip edye for preventing slipping between the appendage and the lip.
According to another aspect of the invention, the fastener is provided for use in rigidly attaching a sheetmetal electrical box to a sheetmetal stud of generally channel shape. The stud includes a pair of parallel flanges, each having an inner extremity and an outer extremity, the inner extremities of the two flanges being connected by a web lying generally at right angles thereto, and the outer extremities of each flange having a short lip portion turned
- 3 -sb/J,' toward the outer extremi~ies o~ the other flanye and terminating in an e~ge. The elec~rical box includes a plurality of sidewalls and a back~7al1. The fastener attaches only to the flange and short lip portion without engaging the web. I'he fastener includes a blanked and formed piece of sheetmetal, the piece of shee-tmetal including an elec-trical box attachment portion and spaced therefrom a metal stud attachment portion. The electrical box attachment portion has a pair of parallel surfaces spaced apart approximately the thickness of the electrichl box sidewall for snugly slippin.g thereover. The stud attachment portion includes two appendages in the form of a pair of relatively widely spaced fingers which are generally U~shaped in cross section and which slip over the outer extremities of the stud flange. The electrical box attachment portion also includes another appendage in the form of an angled arm having midportions that bear both on the inner surface of the flange and also simultaneously against the lip edge in a direction to draw the fingers into the stud and thereby lock the fas~ener thereto.
One object of this invention is to provide an improved fastener or clip for attaching electrical boxes or the like to metal studs that is af~ixable universally to essentially all sheetmetal boxes as well as to any s-tandard size metal stud. Another object is to provide the clip or fastener with means that securely holds the electrical box to the metal stud 50 as to prevent slipping or cocking of the electrical box once installed onto a metal stud.
D~SCRIPTION OF THE DRAWINGS
Fi~ure 1 is a generally frontal perspec-tive view of a fastener incorporating the principles of the present invention.
- 3a -Ç~
sb/~.
Fiyure 2 is a top or edge view of the fastener shown in Figure 1.
Figure 3 is a perspecti~e view of the fastener similar to Figure 1, but here shown connecting a standard electrical box to a metal stud.
- 3b -sb/~
Figure 4 is a generally rear perspective view of the fastener connecting a standard electrical box to a metal stud, portions of the metal stud being cut away to better show the manner in which the connection is made.
Figure 5 is a partially cross sectional view of a metal stud and electrical box connected by the new and improved fastener, this view being taken substantially along the lines 5-5 of'Figure 4.
DESCRIPTION OF PREFERRED EMBODIMENT
Referring now to the drawings, there is shown an improved clip or fastener designated generally 10 for securing an electrical box or the like shown generally at 12 to a metal stud shown generally at 14.
The electrical bo~ 12 can be of standard construction including four sidewalls 20 and a rear wall 22. Side--walls 20 each extend forwardly from rear wall 22 and terminate in a front edge 24. Both of the sidewalls and rear wall typically include a plurality of knockouts 26 therein, as is well known, for bringing electrical wires or cables into the electrical box.
Metal stud 14 is generally channel shaped and includes a parallel pair o~ flanges 30 joined at their inner ends by a perpendicular web 32. The outermost extremities of flanges 30, those spaced furthest from web 32, are bent at right anyles to trle flanges and thus create an inturned lip 34 terminating wi,h an edge 35.
.~ _ Sheetmetal fastener 10 includes an electrical box attachment portion 40 and a metal stud attachment portion 42 connected together by an intermediary portion 44.
When the fastener 10 is connected to a metal stud, the elect-rical box attachment portion 40 extends rearwardly, i. e., perpendicularly awa~ from the plane of edges 24. Portion 40 is largely a flat ~trip or plane of sheetmetal 46, and struck from its mid-portions is a generally parallel leg 50 having its outer-~most end 52 canted inwardly and forwardly. As can be seen per-haps best in Figure 5, the two closely spaced and parallel surfaces46 and 50 of portion 40 slip over one of the sidewalls 20 of an electrical box, and inwardly turned extremities 52 of leg 50 bite into the sidewall 20 to securely hold the clip or fastener 10 thereto.
Metal stud attachment portion 42 includes a flat and planar base portion 60 having three appendages formed therefrom. Two widely spaced and generally U-shaped fingers 62 and 64 are de-signed to slip over the outermost extremities including the lip 34 of the metal stud. Each finger is dimpled as at 65 to facilitate adjustment of the box longitudinally along the stud. A third appendage 66 in the form of an arm comprises means for applying pressure to the metal stud in such a manner as to cause itself and the other two appendages to squeeze the stud extremities there-between, thereby locking the fastener 10 to the metal stud.
Appendage 66 has several stops 68 formed therein, and one of these (depending upon the width of lip 34) will bear against stud edge 36 for greater rigidity.
This can perhaps best be seen with a comparison of Figures 2 and 5. Arm-like appendage 66 simultaneously pushes against the inner surface of flange 30 and against edge 36. The direction of this applied force draws fingers 62 and 64 in the opposite direction 90 as to clamp the lip 34 and outer portions of flange 30 therebetween. This securely locks fastener 10 to the metal stud, and because the electrical box 12 is already securely clamped to metal fastener 10, electrical box 12 is fixed relative to metal stud 14.
Attachment of fastener 10 to the electrical box simply involves pushing it over a sidewall 20 as far as it will go, and attach-ment of the fastener and electrical box combination to the metal stud requires only a little more effort. Perhaps the simpliest technique is to first properly orient the box with fastener 10 adjacent lip 34 and the four box edges 24 generally in the plane of the eventual wall (parallel with the closest flange 30). Then cock the upper edge of the box forward and slip finger 62 over stud lip 34, generally as shown in Figure 3, and then bring the bottom of the box forwardly and slip finger 64 also over lip 34, at which time the fastener snaps in place and is securely locXed to the metal stud. Movement of the box and fastener combination longitudinally along the stud is achieved simply by applying an appropriate degree of force in the direction it is desired to move the box. The amount of force required depends entirely upon the design of the fastener, this including the thickness of its sheetmetal, lengths of the three appendages, and also the degree of spring temper in the fastener material brought about during heat treatment.
~ ~9 ~q~
The above disclosure is offered for public dissemination in return for the grant of a patent. Although it is detailed to insure adequacy and aid understanding, this is not intended to prejudice that purpose of the patent which is to cover each new and inventive concept contained therein no matter how others may later disguise it by variations in form or additions for further improvements. The true breadth or scope of the inven-tion is to be determined by the language used in the claims herein when given its broadest, reasonable interpretation.
One object of this invention is to provide an improved fastener or clip for attaching electrical boxes or the like to metal studs that is af~ixable universally to essentially all sheetmetal boxes as well as to any s-tandard size metal stud. Another object is to provide the clip or fastener with means that securely holds the electrical box to the metal stud 50 as to prevent slipping or cocking of the electrical box once installed onto a metal stud.
D~SCRIPTION OF THE DRAWINGS
Fi~ure 1 is a generally frontal perspec-tive view of a fastener incorporating the principles of the present invention.
- 3a -Ç~
sb/~.
Fiyure 2 is a top or edge view of the fastener shown in Figure 1.
Figure 3 is a perspecti~e view of the fastener similar to Figure 1, but here shown connecting a standard electrical box to a metal stud.
- 3b -sb/~
Figure 4 is a generally rear perspective view of the fastener connecting a standard electrical box to a metal stud, portions of the metal stud being cut away to better show the manner in which the connection is made.
Figure 5 is a partially cross sectional view of a metal stud and electrical box connected by the new and improved fastener, this view being taken substantially along the lines 5-5 of'Figure 4.
DESCRIPTION OF PREFERRED EMBODIMENT
Referring now to the drawings, there is shown an improved clip or fastener designated generally 10 for securing an electrical box or the like shown generally at 12 to a metal stud shown generally at 14.
The electrical bo~ 12 can be of standard construction including four sidewalls 20 and a rear wall 22. Side--walls 20 each extend forwardly from rear wall 22 and terminate in a front edge 24. Both of the sidewalls and rear wall typically include a plurality of knockouts 26 therein, as is well known, for bringing electrical wires or cables into the electrical box.
Metal stud 14 is generally channel shaped and includes a parallel pair o~ flanges 30 joined at their inner ends by a perpendicular web 32. The outermost extremities of flanges 30, those spaced furthest from web 32, are bent at right anyles to trle flanges and thus create an inturned lip 34 terminating wi,h an edge 35.
.~ _ Sheetmetal fastener 10 includes an electrical box attachment portion 40 and a metal stud attachment portion 42 connected together by an intermediary portion 44.
When the fastener 10 is connected to a metal stud, the elect-rical box attachment portion 40 extends rearwardly, i. e., perpendicularly awa~ from the plane of edges 24. Portion 40 is largely a flat ~trip or plane of sheetmetal 46, and struck from its mid-portions is a generally parallel leg 50 having its outer-~most end 52 canted inwardly and forwardly. As can be seen per-haps best in Figure 5, the two closely spaced and parallel surfaces46 and 50 of portion 40 slip over one of the sidewalls 20 of an electrical box, and inwardly turned extremities 52 of leg 50 bite into the sidewall 20 to securely hold the clip or fastener 10 thereto.
Metal stud attachment portion 42 includes a flat and planar base portion 60 having three appendages formed therefrom. Two widely spaced and generally U-shaped fingers 62 and 64 are de-signed to slip over the outermost extremities including the lip 34 of the metal stud. Each finger is dimpled as at 65 to facilitate adjustment of the box longitudinally along the stud. A third appendage 66 in the form of an arm comprises means for applying pressure to the metal stud in such a manner as to cause itself and the other two appendages to squeeze the stud extremities there-between, thereby locking the fastener 10 to the metal stud.
Appendage 66 has several stops 68 formed therein, and one of these (depending upon the width of lip 34) will bear against stud edge 36 for greater rigidity.
This can perhaps best be seen with a comparison of Figures 2 and 5. Arm-like appendage 66 simultaneously pushes against the inner surface of flange 30 and against edge 36. The direction of this applied force draws fingers 62 and 64 in the opposite direction 90 as to clamp the lip 34 and outer portions of flange 30 therebetween. This securely locks fastener 10 to the metal stud, and because the electrical box 12 is already securely clamped to metal fastener 10, electrical box 12 is fixed relative to metal stud 14.
Attachment of fastener 10 to the electrical box simply involves pushing it over a sidewall 20 as far as it will go, and attach-ment of the fastener and electrical box combination to the metal stud requires only a little more effort. Perhaps the simpliest technique is to first properly orient the box with fastener 10 adjacent lip 34 and the four box edges 24 generally in the plane of the eventual wall (parallel with the closest flange 30). Then cock the upper edge of the box forward and slip finger 62 over stud lip 34, generally as shown in Figure 3, and then bring the bottom of the box forwardly and slip finger 64 also over lip 34, at which time the fastener snaps in place and is securely locXed to the metal stud. Movement of the box and fastener combination longitudinally along the stud is achieved simply by applying an appropriate degree of force in the direction it is desired to move the box. The amount of force required depends entirely upon the design of the fastener, this including the thickness of its sheetmetal, lengths of the three appendages, and also the degree of spring temper in the fastener material brought about during heat treatment.
~ ~9 ~q~
The above disclosure is offered for public dissemination in return for the grant of a patent. Although it is detailed to insure adequacy and aid understanding, this is not intended to prejudice that purpose of the patent which is to cover each new and inventive concept contained therein no matter how others may later disguise it by variations in form or additions for further improvements. The true breadth or scope of the inven-tion is to be determined by the language used in the claims herein when given its broadest, reasonable interpretation.
Claims (2)
1. An improved fastener for attaching an electrical box to a formed sheetmetal member, said member including a flange with a lip turned generally at a right angle thereto and terminating in an edge, the improved fastener attaching only to the flange and lip and comprising:
a piece of formed metal having an electrical box attachment portion and a sheetmetal member attachment portion, said electrical box attachment portion including means for securely affixing said fastener to said electrical box, said sheetmetal member attachment portion being spaced from the electrical box attachment portion and having at least one finger extending therefrom designed to fit over said lip and part of said flange, said sheetmetal member attachment portion also having pressure application means extending therefrom in the form of an elongate and resilient appendage having midportions that push against said edge in an outward direction so as to drive said finger into compressive contact with said flange and lip to thereby lock the fastener thereto, said midportions including at least two longitudinally spaced locking stops extending outwardly therefrom, one of which engages the lip edge for preventing slipping between said appendage and lip.
a piece of formed metal having an electrical box attachment portion and a sheetmetal member attachment portion, said electrical box attachment portion including means for securely affixing said fastener to said electrical box, said sheetmetal member attachment portion being spaced from the electrical box attachment portion and having at least one finger extending therefrom designed to fit over said lip and part of said flange, said sheetmetal member attachment portion also having pressure application means extending therefrom in the form of an elongate and resilient appendage having midportions that push against said edge in an outward direction so as to drive said finger into compressive contact with said flange and lip to thereby lock the fastener thereto, said midportions including at least two longitudinally spaced locking stops extending outwardly therefrom, one of which engages the lip edge for preventing slipping between said appendage and lip.
2. For use in rigidly attaching a sheetmetal electrical box to a sheetmetal stud of generally channel shape, said stud including a pair of parallel flanges, each having an inner extremity and an outer extremity, the inner extremities of the two flanges being connected by a web lying generally at right angles thereto, and the outer extremities of each flange having a short lip portion turned toward the outer extremities of the other flange and terminating in an edge, the electrical box including a plurality of sidewalls and a backwall; an improved fastener that attaches only to the flange and short lip portion without engaging the web, comprising:
a blanked and formed piece of sheetmetal, said piece of sheetmetal including an electrical box attachment portion and spaced therefrom a metal stud attachment portion, said electrical box attachment portion having a pair of parallel surfaces spaced apart approximately the thick-ness of the electrical box sidewall for snugly slipping thereover, said stud attachment portion including two appendages in the form of a pair of relatively widely spaced fingers which are generally U-shaped in cross section and which slip over the outer extremities of the stud flange, said electrical box attachment portion also including another appendage in the form of an angled arm having midportions that bear both on the inner surface of the flange and also simultaneously against the lip edge in a direction to draw the fingers into the stud and thereby lock the fastener thereto.
a blanked and formed piece of sheetmetal, said piece of sheetmetal including an electrical box attachment portion and spaced therefrom a metal stud attachment portion, said electrical box attachment portion having a pair of parallel surfaces spaced apart approximately the thick-ness of the electrical box sidewall for snugly slipping thereover, said stud attachment portion including two appendages in the form of a pair of relatively widely spaced fingers which are generally U-shaped in cross section and which slip over the outer extremities of the stud flange, said electrical box attachment portion also including another appendage in the form of an angled arm having midportions that bear both on the inner surface of the flange and also simultaneously against the lip edge in a direction to draw the fingers into the stud and thereby lock the fastener thereto.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000411619A CA1192294A (en) | 1982-09-16 | 1982-09-16 | Fastener for attaching electrical boxes to steel studs |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000411619A CA1192294A (en) | 1982-09-16 | 1982-09-16 | Fastener for attaching electrical boxes to steel studs |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1192294A true CA1192294A (en) | 1985-08-20 |
Family
ID=4123603
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000411619A Expired CA1192294A (en) | 1982-09-16 | 1982-09-16 | Fastener for attaching electrical boxes to steel studs |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1192294A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5810303A (en) * | 1997-08-13 | 1998-09-22 | Temco Electric Products Company, Inc. | Stud bracket to mount a wiring box to a stud |
-
1982
- 1982-09-16 CA CA000411619A patent/CA1192294A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5810303A (en) * | 1997-08-13 | 1998-09-22 | Temco Electric Products Company, Inc. | Stud bracket to mount a wiring box to a stud |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEC | Expiry (correction) | ||
| MKEX | Expiry |