Lockout device
First Claim
1. A lockout apparatus for use with an energy controlling device, such as a valve or regulator, having a rotatable shaft that may be manually set at a selected position to control the flow of energy through said device, the apparatus preventing further rotation of the shaft, comprising:
- a generally cylindrical handle body having a central axis and opening at a lower end of the body for receiving the rotatable shaft and a second cylindrical opening in the upper end;
a ring gear, having teeth directed radially inward toward the axis of said handle body, connected to the rotatable shaft for fixed rotation therewith;
bearing means mounted within said handle lower opening for rotatively supporting said ring gear;
a key locking mechanism mounted in said second cylindrical opening, radially inward from said teeth, and including a key-actuated center cylinder having a locking dog movable from a first position disengaged from said ring gear to a second position engaged with said ring gear;
whereby when said locking dog is in said first position, the handle body rotates relative to the ring gear and rotatable shaft of the energy controlling device and in the second position is rotatably fixed with said ring gear and rotatable shaft so as to permit rotation of the handle body to effect like rotation of the shaft of the energy controlling device.
8 Assignments
0 Petitions
Accused Products
Abstract
A locking device for use in connection with an energy controlling apparatus, such as a valve, or regulator, to prevent unauthorized persons from changing the position of a rotatable shaft of the apparatus that controls the amount of energy that flows through the apparatus. The locking device includes a handle used to manually set the position of the shaft. It also includes a gear that is rotatably mounted in the handle and is fixed to the shaft of the apparatus. A first locking mechanism carried by the handle mechanically and selectively couples the handle and the gear through a key access to the lock. A spring-biased ratchet mechanism may be provided to permit rotation of the shaft in one direction only. A personal locking mechanism with only a single key is selectively lockable to the handle so that in the locked position it prevents access to the first locking mechanism.
50 Citations
30 Claims
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1. A lockout apparatus for use with an energy controlling device, such as a valve or regulator, having a rotatable shaft that may be manually set at a selected position to control the flow of energy through said device, the apparatus preventing further rotation of the shaft, comprising:
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a generally cylindrical handle body having a central axis and opening at a lower end of the body for receiving the rotatable shaft and a second cylindrical opening in the upper end; a ring gear, having teeth directed radially inward toward the axis of said handle body, connected to the rotatable shaft for fixed rotation therewith; bearing means mounted within said handle lower opening for rotatively supporting said ring gear; a key locking mechanism mounted in said second cylindrical opening, radially inward from said teeth, and including a key-actuated center cylinder having a locking dog movable from a first position disengaged from said ring gear to a second position engaged with said ring gear; whereby when said locking dog is in said first position, the handle body rotates relative to the ring gear and rotatable shaft of the energy controlling device and in the second position is rotatably fixed with said ring gear and rotatable shaft so as to permit rotation of the handle body to effect like rotation of the shaft of the energy controlling device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A lockout apparatus for use with an energy controlling device, such as a valve or regulator, having a fixed central stem and a rotatable shaft, which shaft may be manually set at any one of a plurality of selected positions to control the flow of energy through said apparatus, the apparatus preventing further rotation of the shaft, comprising:
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a handle body defining a central bore and having an opening at a lower end of the body for receiving the rotatable shaft and a second cylindrical opening in an upper end of the body; engagement means connected to the rotatable shaft for fixed rotation therewith; bearing means mounted within said handle lower opening for rotatively supporting said engagement means; a key locking mechanism mounted in said second cylindrical opening in said upper end of said handle body and having a locking dog movable from a first position disengaged from said engagement means to a second position engaged with said engagement means; and means, within said central bore and connected to said stem and to said engagement means, for indicating the position of the rotatable shaft; whereby when said locking dog is in said first position, the handle rotates relative to the engagement means and rotatable shaft of the energy controlling device and in the second position is rotatably fixed with said engagement means and rotatable shaft so as to permit rotation of the handle to effect like rotation of the shaft of the energy controlling device. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A lockout apparatus for use with an energy controlling device, such as a valve or regulator, having a rotatable shaft that may be manually set at a selected position to control the flow of energy through said device, the apparatus preventing further rotation of the shaft, comprising:
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a handle body comprising an upper end and a lower end, and a central bore between said upper end and said lower end; a ring connected to the rotatable shaft; and means within said central bore for indicating the position of the rotatable shaft. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30)
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Specification