Remotely controlled lockout device

Abstract

A remotely controlled lockout device for an in-line gas flow control valve has a control shaft adapted to be operatively connected to a gas flow control valve and operable between a gas flow control valve open and closed position and a rotatable lock member operatively connected to the control shaft and rotatable between a lock member unlocked position in which the control valve is operable between gas flow control valve open and closed positions and a locked position in which the control valve is locked in a gas flow control valve closed position.

I claim as my invention: 
     
         1 . A remotely controlled lockout device for an in-line gas flow control valve comprising:
 a housing;   a control shaft within said housing adapted to be operatively connected to a gas flow control valve and operable between gas flow control valve open and closed positions;   a rotatable lock member within said housing operatively connected to said control shaft and rotatable between a lock member unlocked position in which said control shaft is operable between gas flow control valve open and closed positions and a lock member locked position in which said control shaft is locked in said gas flow control valve closed position;   biasing means attached to said lock member biasing said lock member toward said lock member locked position;   a remotely controlled actuator movable between a first state in which it engages said lock member to retain said lock member in said lock member unlocked position and a second state in which it disengages said lock member to enable said biasing means to rotate said lock member to said lock member locked position; and   a retaining means which engages said lock member and retains said lock member in said lock member locked position subsequent to said remotely controlled actuator moving from said first state to said second state.   
     
     
         2 . The remotely controlled lockout device of  claim 1  further comprising a pin attached to said control shaft and projecting laterally therefrom, an arcuate slot formed in said lock member which receives said pin, and said pin being movable within said arcuate slot by said control shaft between said gas flow control valve open and closed positions when said lock member is in said lock member unlocked position and said pin being immovable within said arcuate slot and retained in said gas flow control valve closed position when said lock member is in said lock member locked position. 
     
     
         3 . (canceled) 
     
     
         4 . The remotely controlled lockout device of  claim 1  wherein said housing has a cut out portion for receiving said gas line and clamping said lockout device to said gas line and said gas valve. 
     
     
         5 . The remotely controlled lockout device of  claim 1  further comprising an end cap attached to said housing. 
     
     
         6 . A remotely controlled lockout device for an in-line gas flow control valve comprising:
 a housing;   a control shaft within said housing adapted to be operatively connected to a gas flow control valve and operable between gas flow control valve open and closed positions;   a coaxial rotatable lock member within said housing having a central axial bore which receives said control shaft and rotatable between a lock member unlocked position in which said control shaft is operable between gas flow control valve open and closed positions and a lock member locked position in which said control shaft is locked in said gas flow control valve closed position;   a slot formed in one of said lock member and said control shaft;   a pin mounted in the other of said lock member and said control shaft and received in said slot to operatively connect said lock member and said control shaft;   a spring attached to said lock member and biasing said lock member toward said lock member locked position;   a remotely controlled actuator moveable between a first state in which it engages said lock member to retain said lock member in said lock member unlocked position and a second state in which it disengages said lock member and biasing means rotates said lock member to said lock member locked position; and   a retaining means which engages said lock member and retains said lock member in said lock member locked position subsequent to said remotely controlled actuator moving from said first state to said second state.   
     
     
         7 . A remotely controlled lockout device for an in-line gas flow control valve comprising:
 a housing;   a control shaft within said housing adapted to be operatively connected to a gas flow control valve and operable between gas flow control valve open and closed positions;   a coaxial rotatable lock member within said housing having a central axial bore which receives said control shaft and rotatable between a lock member unlocked position in which said control shaft is operable between gas flow control valve open and closed positions and a lock member locked position in which said control shaft is locked in said gas flow control valve closed position;   an arcuate slot extending at least 90 degrees formed in said lock member;   a pin mounted on said control shaft and received in said slot to operatively connect said lock member and said control shaft;   wherein said pin is freely moveable in said slot and said control shaft is operable between said gas flow control valve open and closed positions when said lock member is in said lock member unlocked position and said pin is prevented from moving in said slot and said control shaft is locked in said gas flow control valve closed position when said lock member is in said lock member locked position;   a spring attached to said lock member and biasing said lock member toward said lock member locked position;   a remotely controlled actuator moveable between a first state in which it engages said lock member to retain said lock member in said lock member unlocked position and a second state in which it disengages said lock member to enable said spring to rotate said lock member to said lock member locked position; and   a retaining means which engages said lock member and retains said lock member in said lock member locked position subsequent to said remotely controlled actuator moving from said first state to said second state.   
     
     
         8 . A remotely controlled lockout device for an in-line gas flow control valve comprising:
 a housing;   a control shaft within said housing adapted to be operatively connected to a gas flow control valve and operable between gas flow control valve open and closed positions;   a coaxial rotatable lock member within said housing having a central axial bore which receives said control shaft and rotatable between a lock member unlocked position in which said control shaft is operable between gas flow control valve open and closed positions and a lock member locked position in which said control shaft is locked in said gas flow control valve closed position;   an arcuate slot extending at least 90 degrees formed in said lock member;   a pin mounted on said control shaft and received in said slot to operatively connect said lock member and said control shaft;   wherein said pin is freely moveable in said slot and said control shaft is operable between said gas-flow control valve open and closed positions when said lock member is in said lock member unlocked position and said pin is prevented from moving in said slot and said control shaft is locked in said gas flow control valve closed position when said lock member is in said lock member locked position;   a spring attached to said lock member and biasing said lock member toward said lock member locked position; and   a remotely controlled actuator moveable between a first state in which it engages said lock member to retain said lock member in said lock member unlocked position and a second state in which it engages said lock member to retain said lock member in said lock member locked position.