FIELD OF THE INVENTION
The present invention relates to a circuit breaker lockout device, and more particularly to a circuit breaker lockout device that allows adjacent circuit breakers to be locked out.
BACKGROUND OF THE INVENTION
The desire to maintain the setting of certain toggle switches in either the “on” or “off” position has existed for many years. The Occupational Safety and Health Administration (OSHA) has placed in effect rules which require that energy sources be locked out prior to any work being performed on an electrical circuit. These rules are intended to prevent injuries resulting from someone turning on the power while maintenance or other work is being done on that circuit. A variety of circuit breaker lockout devices are known in the art and generally include a housing which is positioned over the toggle switch to prevent movement of the toggle switch as well as having apertures through which a shackle of a lock can be inserted to prevent removal of the lockout device.
Typically, individual padlocks cannot be installed on adjacent lockout devices due to space constraints. Prior circuit breaker lockout devices generally receive a lock that is positioned perpendicular to the circuit breaker. The perpendicular orientation of the padlock prohibits adjacent circuit breakers from receiving an individual lockout device. As a result, one padlock is often used with multiple circuit breaker lockout devices. This is not desirable since all circuit breaker lockout devices would have to be unlocked at the same time. Thus, it is desirable to provide a circuit breaker lockout device that enables adjacent circuit breakers to be individually locked.
SUMMARY OF THE INVENTION
The present invention is directed to a circuit breaker lockout device that enables adjacent circuit breakers to be individually locked. The circuit breaker lockout device includes a body having a top, a bottom, a front, a back and sides. The top of the body includes a padlock hole. The padlock hole is defined by a channel that is parallel to the body. A padlock is installed in the padlock hole to secure the circuit breaker lockout device. The channel positions the padlock in a plane parallel to the circuit breaker lockout device. The circuit breaker lockout device also includes a toggle screw that extends through the body. The toggle screw secures the circuit breaker lockout device to a circuit breaker.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a perspective view of the circuit breaker lockout device of the present invention.
FIG. 2 is a perspective view of the circuit breaker lockout device of FIG. 1 with the toggle screw pivoted to a non-operable position.
FIG. 3 is a side view of the circuit breaker lockout device of FIG. 2.
FIG. 4 is a cross sectional view of the circuit breaker lockout device of FIG. 1.
FIG. 5 is a cross sectional view of the circuit breaker lockout device of FIG. 2.
FIG. 6 is a perspective view of the circuit breaker lockout device of FIG. 2 installed on a circuit breaker and locked out with a padlock positioned perpendicular to the circuit breaker.
FIG. 7 is a cross sectional view of the circuit break lockout device of FIG. 6.
FIG. 8 is a perspective view of the circuit breaker lockout device of FIG. 2 installed on a circuit breaker and locked out with a padlock positioned parallel to the circuit breaker.
FIG. 9 is a cross sectional view of the circuit breaker lockout device of FIG. 8.
FIG. 10 is a perspective view of adjacent circuit breakers locked out with the circuit breaker lockout devices of FIG. 8.
FIG. 11 is a top view of the adjacent circuit breaker lockout devices of FIG. 10.
FIG. 12 is a perspective view of an alternative circuit breaker lockout device of the present invention.
FIG. 13 is a perspective view of the circuit breaker lockout device of FIG. 12 with the toggle screw pivoted to a non-operable position.
FIG. 14 is a side view of the circuit breaker lockout device of FIG. 13.
FIG. 15 is a cross sectional view of the circuit breaker lockout device of FIG. 12.
FIG. 16 is a cross sectional view of the circuit breaker lockout device of FIG. 13.
FIG. 17 is a perspective view of the circuit breaker lockout device of FIG. 13 installed on a circuit breaker and locked out with a padlock positioned parallel to the circuit breaker.
FIG. 18 is a cross sectional view of the circuit breaker lockout device of FIG. 17.
FIG. 19 is a perspective view of adjacent circuit breakers locked out with circuit breaker lockout devices of FIG. 17.
FIG. 20 is a top view of the adjacent circuit breaker lockout devices of FIG. 19.
DETAILED DESCRIPTION
FIGS. 1-11 illustrate a circuit breaker lockout device 50 of the present invention. The circuit breaker lockout device 50 includes a body 52 with a top 54, a bottom 56, a front 60, a back 64 and sides 66.
The bottom 56 of the body 52 includes an angled opening 58. As described below, the angled opening 58 receives the switch 152 of a circuit breaker 150 when the circuit breaker lockout device 50 is positioned over the circuit breaker 150. The front 60 of the body 52 includes a slot 62 extending from the top 54 towards the bottom 56 of the body 52. Each side 66 of the body 52 includes a padlock hole 68 defining an opening 70 that extends from each side 66 through the body 52 in a plane perpendicular to the body 52. The top 54 of the body 52 includes a padlock hole 72. The padlock hole 72 is defined by a channel 74 that is parallel to the body 52 of the lockout device 50. As discussed below with respect to FIGS. 10 and 11, the padlock hole 72 maintains a padlock 160 in a position parallel to the circuit breaker lockout device 50 to enable adjacent circuit breakers 150 to be locked out.
The body 52 also includes a toggle screw 80 for securing the circuit breaker lockout device 50 on a circuit breaker 150. As illustrated in FIGS. 4 and 5, the toggle screw 80 includes a first member set screw 82 and a second member 84 pivotally secured to the first member 82. The toggle screw 80 is installed in the body 52 at an angle with the first member 82 extending into the angled opening 58 and the second member 84 extending through the slot 62 in the front 60 of the body 52. The second member 84 includes outwardly extending wings 88 for providing a handle to enable a user to easily twist or pivot the toggle screw 80.
FIGS. 6-11 illustrate the circuit breaker lockout device 50 installed on a circuit breaker 150. The circuit breaker lockout device 50 is narrower than the overall width of the circuit breaker 150 and the width of the walls 154 that surround the switch 152. Before a padlock 160 is installed in one of the padlock holes 68, 72, the toggle screw 80 secures the circuit breaker lockout device 50 to the circuit breaker 150. The toggle screw 80 is twisted until the first member 82 is driven against the switch 152 to secure the lockout device 50 to the circuit breaker 150. Once the first member 82 is secure, the second member 84 of the toggle screw 80 pivots downward in the slot 62 to a non-operable position in which the first member 82 cannot be turned. When the second member 84 is in the non-operable position, the padlock holes 68, 72 are accessible.
After the toggle screw 80 is tightened and pivoted, a padlock 160 may be installed in the circuit breaker lockout device 50. FIGS. 6 and 7 illustrate the circuit breaker lockout device 50 with a padlock 160 installed in the padlock hole 68 to secure the circuit breaker lockout device 50 over the circuit breaker 150. The padlock 160 is positioned perpendicular to the circuit breaker lockout device 50.
Alternatively, as illustrated in FIGS. 8 and 9, a padlock 160 may be installed in the padlock hole 72 of the circuit breaker lockout device 50. When the padlock 160 is installed in the padlock hole 72, the padlock 160 remains parallel to the circuit breaker lockout device 50. As illustrated in FIG. 8, the width of the installed padlock 160 does not exceed the width of the circuit breaker 150. As a result, adjacent circuit breakers 150 may receive a circuit breaker lockout device 50 to be locked out.
FIGS. 10 and 11 illustrate adjacent circuit breakers 150 locked via adjacent circuit break lockout devices 50. The orientation of the padlock hole 72 in the circuit breaker lockout device 50 enables the adjacent circuit breakers 150 to be locked. Additionally, the orientation of the padlock holes 68, 72 in the circuit breaker lockout device 50 enables a padlock 160 to be installed in two directions, as desired.
FIGS. 12-20 illustrate an alternative circuit breaker lockout device 100. The alternative circuit breaker lockout device 100 includes a body 102 with a top 104, a bottom 106, front 110, back 114 and sides 116. The bottom 106 of the body 102 includes an angled opening 108. The front 110 of the body 102 includes a slot 112 extending from the top 104 towards the bottom 106 of the body 102. The top 104 of the body 102 includes a padlock hole 118 that is defined by a channel 120 that extends parallel to the body 102 of the lockout device 100.
The body 102 also includes a toggle screw 130 for securing the circuit breaker lockout device 100 on a circuit breaker 150. The toggle screw 130 is identical to the toggle screw 80 described above with respect to FIGS. 1-11. As illustrated in FIGS. 15 and 16, the toggle screw 130 includes a first member 132 and a second member 134 pivotally secured to the first member 132. The toggle screw 130 is installed in the body 102 at an angle with the first member 132 extending into the angled opening 108 and the second member 134 extending through the slot 112 in the front 110 of the body 102. The second member 134 includes outwardly extending wings 138 for providing a handle to enable a user to easily twist or pivot the toggle screw 130.
FIGS. 17-20 illustrate the circuit breaker lockout device 100 installed on a circuit breaker 150. As described above, before a padlock 160 is installed in the padlock hole 118, the toggle screw 130 secures the circuit breaker lockout device 100 to the circuit breaker 150. Once the first member 132 is secure, the second member 134 of the toggle screw 130 pivots downward in the slot 112 to a non-operable position. A padlock 160 may now be installed in the padlock hole 118 of the circuit breaker lockout device 100. The padlock 160 remains parallel to the circuit breaker lockout device 100 with the width of the padlock 160 not exceeding the width of the circuit breaker 150. As a result, as illustrated in FIGS. 19 and 20, a circuit breaker lockout device 100 may be positioned on adjacent circuit breakers 150 to lockout adjacent circuit breakers 150.
The orientation of the padlock holes of the circuit breaker lockout device of the present invention enables a user to secure the circuit breaker lockout device onto adjacent circuit breakers thereby individually locking the adjacent circuit breakers.
Furthermore, while the particular preferred embodiments of the present invention have been shown and described, it will be obvious to those skilled in the art that changes and modifications may be made without departing from the teaching of the invention. The matter set forth in the foregoing description and accompanying drawings is offered by way of illustration only and not as limitation. The actual scope of the invention is intended to be defined in the following claims when viewed in their proper perspective based on the prior art.
Patent Grant
8629359
