How to Lower and Raise a Chock

 

To lower and raise the chock, the wings 138 contact the first and second post guides and then deflect inward. As the wings 138 deflect inward, the hinge axis is raised, and the upper chocking member 114 and lower chocking member 98 are both elevated. The wings 138 also contact the first post guide 164 and second post guide 168, respectively. Moreover, they also contact the first post guide 164, and may also be slightly raised if necessary.

When the support wing 138 is raised, the first and second post guides 172 are affixed to the base member 16. The support wing 148 is disposed generally parallel to the upper chocking member 114. In this configuration, the support wing 138 will move toward the front end of the chock. The chocking mechanism enables the chocking members 114 to hold the wings 138 in place. In a reversed position, the support wing 138 will contact the bar guides.

As the wings 138 rise, the lower chocking member 98 is raised as well. The chock 90 and wings138 work together to support the airplane. When the wings 138 deflect, the chocks 90 and wings138 contact the guides on the first and second posts.

To support the Wings 138, the base member 16 is provided with elongated bar guides 160. These bars guide the support wing 138 to the front end of the vehicle. The elongated bar guides engage with the chock 90 as it continues to rise. The chock 94 also contacts the chock 90. The power mechanism 54 stops when the predetermined load of current is reached. Once the wing contacts the tire, it can be lowered or raised.