Patent ID: 7628377

Claim:
A method of actuating a push-pull type valve actuator for energizing a pneumatic braking system in a vehicle, comprising the steps of: providing a biasing member comprising a generally round cap portion, a locking recess formed in the cap portion, and a helical compression spring operationally connected to the cap portion; operationally engaging the locking recess of the biasing member with the valve actuator of a pneumatic braking system disposed on a dash plate having a locking bolt; wherein the depression of the cap portion actuates the valve actuator and increases the potential energy of the biasing member; wherein rotating the cap in a first direction engages the locking bolt; wherein rotation of the cap in a second, opposite direction disengages the locking bolt; and wherein disengaging the cap portion from the locking bolt enables the helical compression spring to release stored potential energy and extend in a direction opposite the pushing force and disengages the biasing member from the valve actuator.