Patent ID: 6789856
Filing Date: 2004-09-14
Classification: B60T,Y10T

Abstract:
A vehicle brake lockout device for coupling between a pneumatically-operable vehicle parking brake and a control valve actuated by a pressurized air source, said control valve having a plunger movable between a brake-disengaging position in which pressurized air flows from a pressurized air supply through said control valve to said parking brake and a brake-engaging position in which said pressurized air flow is prevented, said device comprising:(a) a shaft rotatable with respect to said plunger, said shaft having a recessed portion and a non-recessed portion; (b) a second recess in and between opposed ends of said plunger; (c) a key removably couplable to said shaft to rotate said key and said shaft between: (i) an engaged position in which said non-recessed portion of said shaft protrudes into said second recess while said plunger is in said brake-engaging position, preventing movement of said plunger into said brake-disengaging position, said shaft being rotatable into said engaged position only while said plunger is in said brake-engaging position; and, (ii) a disengaged position in which said recessed portion of said shaft intersects said second recess, permitting movement of said plunger between said brake-disengaging and said brake-engaging positions.