CA2577167A1 - Switch lockout device - Google Patents
Switch lockout device Download PDFInfo
- Publication number
- CA2577167A1 CA2577167A1 CA 2577167 CA2577167A CA2577167A1 CA 2577167 A1 CA2577167 A1 CA 2577167A1 CA 2577167 CA2577167 CA 2577167 CA 2577167 A CA2577167 A CA 2577167A CA 2577167 A1 CA2577167 A1 CA 2577167A1
- Authority
- CA
- Canada
- Prior art keywords
- clamp
- lever
- cam
- lockout device
- screw
- 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
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/20—Interlocking, locking, or latching mechanisms
- H01H9/28—Interlocking, locking, or latching mechanisms for locking switch parts by a key or equivalent removable member
- H01H9/281—Interlocking, locking, or latching mechanisms for locking switch parts by a key or equivalent removable member making use of a padlock
- H01H9/282—Interlocking, locking, or latching mechanisms for locking switch parts by a key or equivalent removable member making use of a padlock and a separate part mounted or mountable on the switch assembly and movable between an unlocking position and a locking position where it can be secured by the padlock
- H01H9/283—Interlocking, locking, or latching mechanisms for locking switch parts by a key or equivalent removable member making use of a padlock and a separate part mounted or mountable on the switch assembly and movable between an unlocking position and a locking position where it can be secured by the padlock the part being removable
Description
Application nunzber / numero de demande:
FgjaTes:
Pages:
~C~ 5C
( Unscannable iteni(s) received with this application To inquire if you can order a copy of the unscaiuiable iterls, p'Lease vzsit tlie CIPO WebSite at HTTP://CIPO.GC.CA
Item(s) ne pouvant etre balaye's Docu.nients re~us avec cette demande ne pouvant etre balayes.
Pour vous renseigner si vous pouvez commander une copie des items ne pouvant etre balay~s, veuillez visiter le site web de I'OPIC au HTTP://CIPO,GC.Cp,.
M r SWITCH LOCKOUT DEVICE
Field of the Invention The present invention relates to protective devices for providing switch safety lockout capability.
BackLyround of the Invention Many switches, such as, for example, circuit breaker switches, are designed to be switched between an "on" position and an "off ' position with minimal force.
Additionally, a circuit breaker switch may be configured to reset certain functions of the circuit breaker when the switch is toggled to the "on" position. Switches are commonly designed to offer little resistance to position change. In application, this feature makes switches easy to use and operate. However, in some conditions, the low resistance of switches to position change can create several concerns. Accidental, innocent or unauthorized switch position changes can cause safety hazards, damage equipment or cause lost production time and/or in-process material losses.
Brief Description of the Drawings Further features and advantages of this invention will become apparent from the following detailed description made with reference to the accompanying drawings.
Figure 1 is a perspective view of a lockout device made in accordance with an embodiment of the invention, shown in a closed position;
Figure 2 is a front elevation view of the lockout device of Figure 1;
Figure 3 is a rear view of the lockout device of Figure 1;
Figure 4 is a left side view of the lockout device of Figure 1;
Figure 5 is a right side view of the lockout device of Figure 1;
Figure 6 is a top view of the lockout device of Figure 1;
Figure 7 is a bottom view of the lockout device of Figure 1;
Figure 8 is an exploded view of the lockout device of Figure 1;
Figure 9 is a perspective view of the lockout device of Figure 1, shown from a {WAJ1896.DOC;1 } 1 different perspective;
Figure 10 is a front view of the lockout device of Figure 1, shown in an open position;
Figure 11 is a perspective view of a lockout device made in accordance with another embodiment of the invention, shown in a closed position;
Figure 12 is a front elevation view of the lockout device of Figure 11;
Figure 13 is a rear view of the lockout device of Figure 11;
Figure 14 is a left side view of the lockout device of Figure 11;
Figure 15 is a right side view of the lockout device of Figure 11;
Figure 16 is a top view of the lockout device of Figure 11;
Figure 17 is a bottom view of the lockout device of Figure 11;
Figure 18 is an exploded view of the lockout device of Figure 11;
Figure 19 is a perspective view of the lockout device of Figure 11, shown from a different perspective;
Figure 20 is a front view of the lockout device of Figure 11, shown in an open position; and Figure 21 is a perspective view of the lockout device of Figure 11, shown in an open position.
Detailed Descrintion of the Invention The Detailed Description of the Invention merely describes preferred embodiments of the invention and is not intended to limit the scope of the disclosure in any way. Indeed, the invention as described by the specification is broader than and unlimited by the preferred embodiments, and the terms in the specification have their full ordinary meaning.
Referring now to the drawings, Figures 1-7 illustrate a lockout device 100 made in accordance with an embodiment of the invention. Figure 8 illustrates an exploded view of exemplary components of the locking device 100. A main body 1 is connected to a cam 7 by an elongated rivet 6. The cam can rotate about the rivet. Within the main body, a clamp 5 having a clamping surface and an opposing screw clamp 4 are positioned. The screw clamp is movable toward the clamp 5 by rotation of a screw cap 3. The screw cap interfaces with an adjustment screw 2. In operation, the device begins in the open position shown in Figure 10.
The switch to be secured is placed between the clam 5 and the screw clamp 4.
The screw { WAJ 1896.DOC;1 } 2 clamp is adjusted by rotation of the screw cap 3 to adequately tighten the clamps 4, 5 against the switch. Subsequently, the cam 7 is rotated to a closed position to further tighten the lockout device 100. At this point, the shackle of a padlock, or other similar device, can be inserted through the aligned hasps in the body 1 and cam 7 to lock the device in place.
Further detail regarding the operation of this device 100 can be found in the attached Appendix.
Figures 11-17 illustrate a lockout device 200 made in accordance with another embodiment of the invention. Figure 8 illustrates an exploded view of exemplary components of the locking device 100. A main body 11 is connected to a cam 16 by an elongated rivet 17.
The cam can rotate about the rivet. Within the main body, a clamp 15 having a clamping surface and an opposing screw clamp 14 are positioned. The screw clamp is movable toward the clamp 15 by rotation of a screw cap 13. The screw cap interfaces with an adjustment screw 12. In operation, the device begins in the open position shown in Figures 20 and 21.
The switch to be secured is placed between the clamp 15 and the screw clamp 14. The screw clamp is adjusted by rotation of the screw cap 13 to adequately tighten the clamps 14, 15 against the switch. Subsequently, the cam 16 is rotated to a closed position to further tighten the lockout device 200. At this point, the shackle of a padlock, or other similar device, can be inserted through the aligned hasps in the body 11 and cam 16 to lock the device in place.
Further detail regarding the operation of the device can be found in the attached Appendix.
While various inventive aspects, concepts and features of the inventions may be described and illustrated herein as embodied in combination in the exemplary embodiments, these various aspects, concepts and features may be used in many alternative embodiments, either individually or in various combinations and sub-combinations thereof.
Unless expressly excluded herein all such combinations and sub-combinations are intended to be within the scope of the present inventions. Still further, while various alternative embodiments as to the various aspects, concepts and features of the inventions--such as alternative materials, structures, configurations, methods, circuits, devices and components, software, hardware, control logic, alternatives as to form, fit and function, and so on--may be described herein, such descriptions are not intended to be a complete or exhaustive list of available alternative embodiments, whether presently known or later developed.
Those skilled in the art may readily adopt one or more of the inventive aspects, concepts or features { WAJ1896.DOC;1 } 3 into additional embodiments and uses within the scope of the present inventions even if such embodiments are not expressly disclosed herein. Additionally, even though some features, concepts or aspects of the inventions may be described herein as being a preferred arrangement or method, such description is not intended to suggest that such feature is required or necessary unless expressly so stated. Still further, exemplary or representative values and ranges may be included to assist in understanding the present disclosure; however, such values and ranges are not to be construed in a limiting sense and are intended to be critical values or ranges only if so expressly stated. Moreover, while various aspects, features and concepts may be expressly identified herein as being inventive or forming part of an invention, such identification is not intended to be exclusive, but rather there may be inventive aspects, concepts and features that are fully described herein without being expressly identified as such or as part of a specific invention. Descriptions of exemplary methods or processes are not limited to inclusion of all steps as being required in all cases, nor is the order that the steps are presented to be construed as required or necessary unless expressly so stated.
Appendix Additional disclosure of the invention is included in the Appendix.
{WAJ1896.DOC;1 } 4 APPENDIX
Titie of Invention:
Circuit Breaker Lockout Device Ob ect of Invention:
Design a better performing product that also has a more universal fit and higher removal force than current products.
Description of Invention:
Backaround OSHA Standard 29CFR1910.147 requires energy lockout/tag out procedures for the servicing and maintenance of machines and equipment in which the unexpected energization or start up of the machines or equipment could cause injury to employees. One of the aspects of standard lockout procedure is to open the circuit feeding power to the equipment to be serviced and then lock it in the "ofP"
position. A few circuit breaker and panel manufacturers incorporate a provision for this into their designs but it is not common. It is typically achieved by the use of a circuit breaker lockout (CBL) device. Many of these devices attach to the lever of the breaker in such a way that prevents the lever from being closed (turned "on"). Examples:
. ..,.~,. .a... _.. ,.._.:... P51~ot05.310,Y00aM55.ST7.SYi ~. tl ~,*S
,yYqRH
There are no estabiished standards for the circuit breaker levers in the United States. They vary greatly in width, thickness and height even along one manufacturer's product line. Some have holes in the side, but even they vary in size and location. Due to the electrical and heat resistance needed the levers are primarily a thermoset material although there are some thermoplastic materials that are now being used. Whether either class of material that is used, they all possess an almost glass-like hardness. The lever profiles also tend to be tapered or curved which makes gripping them very difficult. Most devices currently on the market do not work well or only work on a very select type of breaker. Many can be removed with the lock still attached and others allow the breaker to be closed (turned "on") even with the device attached.
Function: This invention design basically functions like a clamp utilizing a cam to provide short displacement, high clamping force action somewhat similar to a Vise-GripTM tool. The cam action allows a clamping force significantly higher than what is possible using only a screw. The invention also uses two clamp pieces that have relatively large flat contact areas compared to other designs which have point or line contact on the lever.
This helps control the angle of the lever preventing it from being moved with the device attached. The clamp contact areas also have a series of sharp points, edges, or textured features which along with the large contact area will spread the clamping force over a larger section of the lever. Due to the hardness of the typical lever material it is very difficult to grip the levers without a sharp and hard point or edge. High force on a single point or line can crack the levers. The invention is also designed to accept at least one padlock or safety hasp to allow the device to only be removed by authorized personnel.
{ WAJ 1895.DOC;1 } Page 1 of 3 Desi_an: An embodiment of the invention has several components.
= A body or frame that holds the other components and has holes for the padlocks or hasps. The body is also slotted to allow the invention to be used on "ganged" breakers, which are two or more breakers side by side that have their levers connected with a steel or plastic bar.
= A thumb screw anchored to the frame or body that acts upon one of the clamp pieces and is used for initial large adjustments accommodating the various widths of the circuit breaker levers. Using a non-rotating clamp piece to contact the lever is important. A major problem with existing designs that use the end of a screw to clamp onto the lever is that the rotation of the screw tends to move or walk the device off of the lever as it is being tightened.
= A cam handle with pivot pin anchored to the frame or body that provides the high clamping force and prevents or blocks access to the thumb screw when closed. By changing the cam profile the amount of displacement the handle moves the clamp can also be changed. The displacement of the handle clamp cam generates the high force applied to the circuit breaker lever. Also by allowing some over travel (accomplished by modifying the profile of the cam surface) in the closed position the handle can be partially opened without releasing the clamp on the circuit breaker lever. This allows a larger padlock/hasp hole to be used for smaller diameter shackles or hasps . Many other devices use specific padlock/hasp sizes to prevent the "play" from loosening the device.
= Two clamps that press onto opposing sides of the lever. One adjusted by the thumb screw and the other contacts the cam handle. The clamp on the cam handle side can be guided by several means such as slots or with a pivot feature in the opposing sides of the body or frame. The clamps have sharp edges, features or texture on their faces to "bite" into the surface of the levers.
General Use: The device is placed onto the circuit breaker such that the breaker lever is in the slot between the clamps. The thumb screw is then tightened until it contacts the breaker lever and is "finger tight". The handle is then closed which finalizes the clamp onto the breaker lever. A padlock or hasp can then be inserted through one of the holes in the body which prevents or blocks the handle from being opened. To remove the invention, the securing lock or hasp must be removed first, the handle is then opened which removes the clamping force on the breaker lever. The thumb screw can then be adjusted if needed to remove the device.
Construction: The body or frame can be steel, high strength plastic or suitable die cast material. The clamps can be solid die cast or plastic with a sharp metal grate on the contacting surface. The cam handle can be high strength thermoplastic, theromset, die cast, or extrusion.
= A body clamp that holds an adjustment screw and presses onto the surface of the lever. The clamp area has sharp edges on its face to "bite" into the surface of the lever.
= An adjustment screw that is threaded into a clamp piece and used for initial large adjustments accommodating the various widths of the circuit breaker levers.
= A cam handle that provides the high force clamping and acts as the adjustment screw knob. By changing the cam profile the amount of displacement the handle moves the clamp can also be changed. The displacement of the handle clamp generates the high force applied to the circuit breaker lever.
= A draw clamp that is pulled onto opposing side of the lever from the body.
It is threaded onto the adjustment screw and forms a slot with the body clamp that allows the invention to be used on "ganged"
breakers, which are two breakers side by side that have their levers connected with a steel or plastic bar.
The clamping area has sharp edges on the face to "bite" into the surface of the lever.
{ WAJ 1895.DOC;1 } Page 2 of 3 Summary of certain invention elements:
1) The device can be applied to single and multi-pole breakers.
FgjaTes:
Pages:
~C~ 5C
( Unscannable iteni(s) received with this application To inquire if you can order a copy of the unscaiuiable iterls, p'Lease vzsit tlie CIPO WebSite at HTTP://CIPO.GC.CA
Item(s) ne pouvant etre balaye's Docu.nients re~us avec cette demande ne pouvant etre balayes.
Pour vous renseigner si vous pouvez commander une copie des items ne pouvant etre balay~s, veuillez visiter le site web de I'OPIC au HTTP://CIPO,GC.Cp,.
M r SWITCH LOCKOUT DEVICE
Field of the Invention The present invention relates to protective devices for providing switch safety lockout capability.
BackLyround of the Invention Many switches, such as, for example, circuit breaker switches, are designed to be switched between an "on" position and an "off ' position with minimal force.
Additionally, a circuit breaker switch may be configured to reset certain functions of the circuit breaker when the switch is toggled to the "on" position. Switches are commonly designed to offer little resistance to position change. In application, this feature makes switches easy to use and operate. However, in some conditions, the low resistance of switches to position change can create several concerns. Accidental, innocent or unauthorized switch position changes can cause safety hazards, damage equipment or cause lost production time and/or in-process material losses.
Brief Description of the Drawings Further features and advantages of this invention will become apparent from the following detailed description made with reference to the accompanying drawings.
Figure 1 is a perspective view of a lockout device made in accordance with an embodiment of the invention, shown in a closed position;
Figure 2 is a front elevation view of the lockout device of Figure 1;
Figure 3 is a rear view of the lockout device of Figure 1;
Figure 4 is a left side view of the lockout device of Figure 1;
Figure 5 is a right side view of the lockout device of Figure 1;
Figure 6 is a top view of the lockout device of Figure 1;
Figure 7 is a bottom view of the lockout device of Figure 1;
Figure 8 is an exploded view of the lockout device of Figure 1;
Figure 9 is a perspective view of the lockout device of Figure 1, shown from a {WAJ1896.DOC;1 } 1 different perspective;
Figure 10 is a front view of the lockout device of Figure 1, shown in an open position;
Figure 11 is a perspective view of a lockout device made in accordance with another embodiment of the invention, shown in a closed position;
Figure 12 is a front elevation view of the lockout device of Figure 11;
Figure 13 is a rear view of the lockout device of Figure 11;
Figure 14 is a left side view of the lockout device of Figure 11;
Figure 15 is a right side view of the lockout device of Figure 11;
Figure 16 is a top view of the lockout device of Figure 11;
Figure 17 is a bottom view of the lockout device of Figure 11;
Figure 18 is an exploded view of the lockout device of Figure 11;
Figure 19 is a perspective view of the lockout device of Figure 11, shown from a different perspective;
Figure 20 is a front view of the lockout device of Figure 11, shown in an open position; and Figure 21 is a perspective view of the lockout device of Figure 11, shown in an open position.
Detailed Descrintion of the Invention The Detailed Description of the Invention merely describes preferred embodiments of the invention and is not intended to limit the scope of the disclosure in any way. Indeed, the invention as described by the specification is broader than and unlimited by the preferred embodiments, and the terms in the specification have their full ordinary meaning.
Referring now to the drawings, Figures 1-7 illustrate a lockout device 100 made in accordance with an embodiment of the invention. Figure 8 illustrates an exploded view of exemplary components of the locking device 100. A main body 1 is connected to a cam 7 by an elongated rivet 6. The cam can rotate about the rivet. Within the main body, a clamp 5 having a clamping surface and an opposing screw clamp 4 are positioned. The screw clamp is movable toward the clamp 5 by rotation of a screw cap 3. The screw cap interfaces with an adjustment screw 2. In operation, the device begins in the open position shown in Figure 10.
The switch to be secured is placed between the clam 5 and the screw clamp 4.
The screw { WAJ 1896.DOC;1 } 2 clamp is adjusted by rotation of the screw cap 3 to adequately tighten the clamps 4, 5 against the switch. Subsequently, the cam 7 is rotated to a closed position to further tighten the lockout device 100. At this point, the shackle of a padlock, or other similar device, can be inserted through the aligned hasps in the body 1 and cam 7 to lock the device in place.
Further detail regarding the operation of this device 100 can be found in the attached Appendix.
Figures 11-17 illustrate a lockout device 200 made in accordance with another embodiment of the invention. Figure 8 illustrates an exploded view of exemplary components of the locking device 100. A main body 11 is connected to a cam 16 by an elongated rivet 17.
The cam can rotate about the rivet. Within the main body, a clamp 15 having a clamping surface and an opposing screw clamp 14 are positioned. The screw clamp is movable toward the clamp 15 by rotation of a screw cap 13. The screw cap interfaces with an adjustment screw 12. In operation, the device begins in the open position shown in Figures 20 and 21.
The switch to be secured is placed between the clamp 15 and the screw clamp 14. The screw clamp is adjusted by rotation of the screw cap 13 to adequately tighten the clamps 14, 15 against the switch. Subsequently, the cam 16 is rotated to a closed position to further tighten the lockout device 200. At this point, the shackle of a padlock, or other similar device, can be inserted through the aligned hasps in the body 11 and cam 16 to lock the device in place.
Further detail regarding the operation of the device can be found in the attached Appendix.
While various inventive aspects, concepts and features of the inventions may be described and illustrated herein as embodied in combination in the exemplary embodiments, these various aspects, concepts and features may be used in many alternative embodiments, either individually or in various combinations and sub-combinations thereof.
Unless expressly excluded herein all such combinations and sub-combinations are intended to be within the scope of the present inventions. Still further, while various alternative embodiments as to the various aspects, concepts and features of the inventions--such as alternative materials, structures, configurations, methods, circuits, devices and components, software, hardware, control logic, alternatives as to form, fit and function, and so on--may be described herein, such descriptions are not intended to be a complete or exhaustive list of available alternative embodiments, whether presently known or later developed.
Those skilled in the art may readily adopt one or more of the inventive aspects, concepts or features { WAJ1896.DOC;1 } 3 into additional embodiments and uses within the scope of the present inventions even if such embodiments are not expressly disclosed herein. Additionally, even though some features, concepts or aspects of the inventions may be described herein as being a preferred arrangement or method, such description is not intended to suggest that such feature is required or necessary unless expressly so stated. Still further, exemplary or representative values and ranges may be included to assist in understanding the present disclosure; however, such values and ranges are not to be construed in a limiting sense and are intended to be critical values or ranges only if so expressly stated. Moreover, while various aspects, features and concepts may be expressly identified herein as being inventive or forming part of an invention, such identification is not intended to be exclusive, but rather there may be inventive aspects, concepts and features that are fully described herein without being expressly identified as such or as part of a specific invention. Descriptions of exemplary methods or processes are not limited to inclusion of all steps as being required in all cases, nor is the order that the steps are presented to be construed as required or necessary unless expressly so stated.
Appendix Additional disclosure of the invention is included in the Appendix.
{WAJ1896.DOC;1 } 4 APPENDIX
Titie of Invention:
Circuit Breaker Lockout Device Ob ect of Invention:
Design a better performing product that also has a more universal fit and higher removal force than current products.
Description of Invention:
Backaround OSHA Standard 29CFR1910.147 requires energy lockout/tag out procedures for the servicing and maintenance of machines and equipment in which the unexpected energization or start up of the machines or equipment could cause injury to employees. One of the aspects of standard lockout procedure is to open the circuit feeding power to the equipment to be serviced and then lock it in the "ofP"
position. A few circuit breaker and panel manufacturers incorporate a provision for this into their designs but it is not common. It is typically achieved by the use of a circuit breaker lockout (CBL) device. Many of these devices attach to the lever of the breaker in such a way that prevents the lever from being closed (turned "on"). Examples:
. ..,.~,. .a... _.. ,.._.:... P51~ot05.310,Y00aM55.ST7.SYi ~. tl ~,*S
,yYqRH
There are no estabiished standards for the circuit breaker levers in the United States. They vary greatly in width, thickness and height even along one manufacturer's product line. Some have holes in the side, but even they vary in size and location. Due to the electrical and heat resistance needed the levers are primarily a thermoset material although there are some thermoplastic materials that are now being used. Whether either class of material that is used, they all possess an almost glass-like hardness. The lever profiles also tend to be tapered or curved which makes gripping them very difficult. Most devices currently on the market do not work well or only work on a very select type of breaker. Many can be removed with the lock still attached and others allow the breaker to be closed (turned "on") even with the device attached.
Function: This invention design basically functions like a clamp utilizing a cam to provide short displacement, high clamping force action somewhat similar to a Vise-GripTM tool. The cam action allows a clamping force significantly higher than what is possible using only a screw. The invention also uses two clamp pieces that have relatively large flat contact areas compared to other designs which have point or line contact on the lever.
This helps control the angle of the lever preventing it from being moved with the device attached. The clamp contact areas also have a series of sharp points, edges, or textured features which along with the large contact area will spread the clamping force over a larger section of the lever. Due to the hardness of the typical lever material it is very difficult to grip the levers without a sharp and hard point or edge. High force on a single point or line can crack the levers. The invention is also designed to accept at least one padlock or safety hasp to allow the device to only be removed by authorized personnel.
{ WAJ 1895.DOC;1 } Page 1 of 3 Desi_an: An embodiment of the invention has several components.
= A body or frame that holds the other components and has holes for the padlocks or hasps. The body is also slotted to allow the invention to be used on "ganged" breakers, which are two or more breakers side by side that have their levers connected with a steel or plastic bar.
= A thumb screw anchored to the frame or body that acts upon one of the clamp pieces and is used for initial large adjustments accommodating the various widths of the circuit breaker levers. Using a non-rotating clamp piece to contact the lever is important. A major problem with existing designs that use the end of a screw to clamp onto the lever is that the rotation of the screw tends to move or walk the device off of the lever as it is being tightened.
= A cam handle with pivot pin anchored to the frame or body that provides the high clamping force and prevents or blocks access to the thumb screw when closed. By changing the cam profile the amount of displacement the handle moves the clamp can also be changed. The displacement of the handle clamp cam generates the high force applied to the circuit breaker lever. Also by allowing some over travel (accomplished by modifying the profile of the cam surface) in the closed position the handle can be partially opened without releasing the clamp on the circuit breaker lever. This allows a larger padlock/hasp hole to be used for smaller diameter shackles or hasps . Many other devices use specific padlock/hasp sizes to prevent the "play" from loosening the device.
= Two clamps that press onto opposing sides of the lever. One adjusted by the thumb screw and the other contacts the cam handle. The clamp on the cam handle side can be guided by several means such as slots or with a pivot feature in the opposing sides of the body or frame. The clamps have sharp edges, features or texture on their faces to "bite" into the surface of the levers.
General Use: The device is placed onto the circuit breaker such that the breaker lever is in the slot between the clamps. The thumb screw is then tightened until it contacts the breaker lever and is "finger tight". The handle is then closed which finalizes the clamp onto the breaker lever. A padlock or hasp can then be inserted through one of the holes in the body which prevents or blocks the handle from being opened. To remove the invention, the securing lock or hasp must be removed first, the handle is then opened which removes the clamping force on the breaker lever. The thumb screw can then be adjusted if needed to remove the device.
Construction: The body or frame can be steel, high strength plastic or suitable die cast material. The clamps can be solid die cast or plastic with a sharp metal grate on the contacting surface. The cam handle can be high strength thermoplastic, theromset, die cast, or extrusion.
= A body clamp that holds an adjustment screw and presses onto the surface of the lever. The clamp area has sharp edges on its face to "bite" into the surface of the lever.
= An adjustment screw that is threaded into a clamp piece and used for initial large adjustments accommodating the various widths of the circuit breaker levers.
= A cam handle that provides the high force clamping and acts as the adjustment screw knob. By changing the cam profile the amount of displacement the handle moves the clamp can also be changed. The displacement of the handle clamp generates the high force applied to the circuit breaker lever.
= A draw clamp that is pulled onto opposing side of the lever from the body.
It is threaded onto the adjustment screw and forms a slot with the body clamp that allows the invention to be used on "ganged"
breakers, which are two breakers side by side that have their levers connected with a steel or plastic bar.
The clamping area has sharp edges on the face to "bite" into the surface of the lever.
{ WAJ 1895.DOC;1 } Page 2 of 3 Summary of certain invention elements:
1) The device can be applied to single and multi-pole breakers.
2) The device can adapt to a wide range or widths, thicknesses, and heights or breaker levers.
3) The device can adapt to a wide range of shapes and styles of breaker levers.
4) The device pad shape and size provides the largest surface area to apply clamp force upon the breaker lever.
5) The textured features that can be applied to the clamp pad surface provide the highest range of applied clamp force upon the breaker lever.
6) The textured features provide the highest range of resistance to removal of the device from the breaker lever.
7) The adjustment screw provides the range of adjusted required to accommodate the widest range of sizes of breaker levers.
8) The cam lobe feature of the cam lever provides the highest range of clamping force.
9) The modified design of the cam lobe allows a "designed in" variance, to compensate for wide range of shackle and hasp sizes.
10) The cam lever design provides a tamper-proof protection to the adjustment screw, thus preventing a violation to the device.
{ WAJ 1895.DOC;1 } Page 3 of 3
{ WAJ 1895.DOC;1 } Page 3 of 3
Claims
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2577167 CA2577167A1 (en) | 2007-02-06 | 2007-02-06 | Switch lockout device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2577167 CA2577167A1 (en) | 2007-02-06 | 2007-02-06 | Switch lockout device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2577167A1 true CA2577167A1 (en) | 2008-08-06 |
Family
ID=39678521
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2577167 Abandoned CA2577167A1 (en) | 2007-02-06 | 2007-02-06 | Switch lockout device |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2577167A1 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2463309A (en) * | 2008-07-09 | 2010-03-17 | Kew Technik Group Ltd | Lock to secure circuit breaker toggle switch using knob actuated threaded shaft and combination lock |
| EP2702598A1 (en) * | 2011-04-26 | 2014-03-05 | Master Lock Company LLC | Lockout device |
| WO2014062656A1 (en) * | 2012-10-16 | 2014-04-24 | Panduit Corp. | Circuit breaker lockout |
| US8748759B2 (en) | 2011-08-12 | 2014-06-10 | Panduit Corp. | Circuit breaker lockout |
| US11004624B2 (en) | 2018-05-30 | 2021-05-11 | ABUS August Bremicker Söhne KG | Circuit breaker lockout apparatus |
-
2007
- 2007-02-06 CA CA 2577167 patent/CA2577167A1/en not_active Abandoned
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2463309A (en) * | 2008-07-09 | 2010-03-17 | Kew Technik Group Ltd | Lock to secure circuit breaker toggle switch using knob actuated threaded shaft and combination lock |
| GB2463309B (en) * | 2008-07-09 | 2013-01-02 | Kew Technik Group Ltd | Circuit breaker lock |
| EP2702598A1 (en) * | 2011-04-26 | 2014-03-05 | Master Lock Company LLC | Lockout device |
| EP2702598A4 (en) * | 2011-04-26 | 2014-10-29 | Master Lock Co | Lockout device |
| US8748759B2 (en) | 2011-08-12 | 2014-06-10 | Panduit Corp. | Circuit breaker lockout |
| WO2014062656A1 (en) * | 2012-10-16 | 2014-04-24 | Panduit Corp. | Circuit breaker lockout |
| US9202646B2 (en) | 2012-10-16 | 2015-12-01 | Panduit Corp. | Circuit breaker lockout |
| JP2015536525A (en) * | 2012-10-16 | 2015-12-21 | パンドウィット・コーポレーション | Circuit breaker lockout |
| US11004624B2 (en) | 2018-05-30 | 2021-05-11 | ABUS August Bremicker Söhne KG | Circuit breaker lockout apparatus |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP2909852B1 (en) | Circuit breaker lockout | |
| CA2603113C (en) | Circuit breaker lockout device | |
| CA2577167A1 (en) | Switch lockout device | |
| EP0824263B1 (en) | Circuit breaker lockout device | |
| US20140165384A1 (en) | Lockout device | |
| EP2490238B1 (en) | Circuit breaker lockout | |
| WO2017195868A1 (en) | Gripping tool for indirect live-wire work | |
| US20140265085A1 (en) | Adjustable toggle action quick release locking bar clamp | |
| TW202045311A (en) | Locking pliers release mechanism | |
| EP3845341B1 (en) | Handheld machine tool with finger protection | |
| US7428131B2 (en) | Safety shield for use with different diameter racking rods and an adaptor for use therewith | |
| EP1446817A1 (en) | CIRCUIT BREAKER LOCK−OUT ASSEMBLY | |
| EP0383720A2 (en) | Vehicle locking device | |
| US11037740B2 (en) | Switch lockout device | |
| US9222598B1 (en) | Adjustable valve wrench | |
| EP2720831B1 (en) | Pipe wrench or water pump wrench | |
| US6899552B1 (en) | Gripping and locking electrical grounding device for single and multiphase electrical equipment | |
| US20020007703A1 (en) | System for fastening elements to be connected | |
| US9339922B2 (en) | Crimping tool | |
| GB2337799A (en) | Fence wire tensioning tool | |
| WO2008001393A1 (en) | Safety wrench and a matching nut | |
| US9841040B2 (en) | Clamping system | |
| EP2801450A1 (en) | Device for remote actuation of a hand tool | |
| AU2014100036A4 (en) | Lock fitting for a circuit protection device | |
| US7114416B2 (en) | Rotatively operating tool for rotatively operated member having a pair of engaging surfaces |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Dead |