Valve actuator locking bracket
AssigneeDyna-Torque Company, Inc.
InventorMichael P. Davison
Life of this patent
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Abstract
A locking bracket for a valve actuator is disclosed in which a bracket element slips over the rotatable input shaft of the actuator and has an arm extending over the surface of the actuator. A locking plate is affixed to the input shaft which may be interconnected to the bracket element. When so interconnected, rotation of the input shaft is prevented by contact between the arm and the surface of the valve actuator. The locking bracket is easily and economically installed due to the lack of any positive physical interconnection between the bracket and the actuator housing.
Claims20
A locking device for a valve actuator having a rotatable input shaft extending externally from a valve housing including an external valve housing surface disposed in an offset relationship to the input shaft, said locking device comprising:
- a bracket means adapted for being removably carried on a portion of said input shaft with said input shaft freely rotatable with respect to said bracket means, said bracket means including an arm means extending in an unaffixed proximity to said surface and a first interconnection means;
- a second interconnection means affixed to another portion of said input shaft for corotation therewith;
- and
- means for interconnecting said first interconnection means and said second interconnection means;
- whereby when said first interconnection means and said second interconnection means are interconnected, rotation of said input shaft is prevented by contact between said arm means and said surface.
A locking device for a valve actuator having a rotatable input shaft extending outwardly from a valve actuator housing, said actuator housing defining an external surface in nonperpendicular offset relationship to the axis of said input shaft, said locking device comprising:
- a removable bracket including a sleeve having a sleeve opening a portion of, said input shaft extending through said sleeve opening, said input shaft being freely rotatable with respect to said sleeve, said bracket further including an arm affixed to said sleeve and extending therefrom in overlying, proximate relationship with said surface, whereby substantial rotation of said bracket on said input shaft is prevented by interfering contact between said arm and said surface, said bracket further including a first locking means;
- a second locking means affixed to another portion of said input shaft for corotation therewith and disposed outwardly of said first locking means;
- and
- means for selectively interconnecting and disconnecting said first and second locking means;
- whereby substantial rotation of said input shaft is prevented when said first and second locking means are interconnected, and whereby substantial rotation of said input shaft is permitted when said first and second locking means are disconnected.
A locking device for a valve actuator having a rotatable input shaft extending outwardly from a valve actuator housing, said housing having an external surface extending generally parallel to, but offset from, the axis of said input shaft, said locking device comprising;
- a removable bracket comprising a sleeve encircling said input shaft, said input shaft being freely rotatable with respect to said sleeve, said bracket further comprising an arm affixed to said sleeve and extending over said surface and proximate thereto whereby rotation of said bracket on said input shaft causes interfering contact between said arm and said surface, and a first locking plate affixed to said sleeve and encircling another portion of said input shaft disposed toward the free end of said input shaft;
- a wheel means affixed to the free end of said input shaft for causing said input shaft to rotate;
- a second locking plate encircling said input shaft affixed to at least one of either said input shaft and said wheel means, said second locking plate disposed between said first locking plate and said wheel means;
- means for selectively interconnecting and disconnecting said first and second locking plates whereby substantial rotation of said input shaft is prevented when said first and second locking plates are interconnected, and whereby substantial rotation of said input shaft is prevented when said first and second locking plates are disconnected.
Dependencies are inferred from the claim text.