When chock 90 is raised, support wings 138 of the chock 90 contact the first and second post guides. This deflection causes the support wings to rise and lift the hinge axis, which in turn raises the upper chocking member 114. As the upper chocking member 114 rises, so does the lower chocking part 98. These actions help the chock 90 reach the lowered position. Wings 138 also support the chock 90's weight when the chock is lowered.

The chock 90 includes two generally triangular support wings 138. These wings extend forward from the upper chocking member 114 and have a bottom edge 146. Each support wing includes a second hinge section 150. The wings are connected to one another by hinge pins 154 extending through the first hinge section 134 and the second hinge section 150 of the support wing. It is not critical which way the hinges are oriented.

Among other things, the invention comprises two support members, including generally triangular support Wings138, that are attached to an upper chocking member 114. The support wings 138 have a forward edge 142, a bottom edge 146, and a second hinge section 150. Both support wings 138 and upper chocking member 114 include hinge pins 154, which extend through the first hinge section 134 of the upper chocking member and through the second portion of the support wing. The hinges are not critical to the invention.