Tire clock for tandem wheels

A new and improved tire chock for tandem wheels for preventing unwanted movement of tandem wheel vehicles, the tire chock for tandem wheels comprising:

• upper and lower opposing wedges which are sized for wedging engagement with facing tire tread surfaces of the tandem wheels to stop wheel rotation, each wedge having arcuate diverging engagement surfaces generally conforming to the curvature of the tire tread surface;
• a threaded bar joining the upper and lower wedges and connected thereto so that rotation of the bar moves the wedges toward and away from each other;
• handle means connected to the bar for rotating the bar for moving the wedges toward and away from each other;
• and
• expansion means for the upper and lower wedges for changing the size of the wedges to fit different tire configurations and for engaging tread surfaces of the different tire configurations, the means comprising front and rear spaced opposing movable brake shoes and a threaded bar with opposite threads at its end joining the front and rear shoes and connected thereto so that rotation of the bar moves the shoes toward and away from each other, the expansion means further including locknuts engagable with each shoe to prevent unwanted movement of the shoes, the locknuts being threadedly engaged with the threaded bar.