(under subclass 47) Structure in which the accommodating means defines an upwardly facing concavity or upwardly diverging angle(s), whether continuous or interrupted, in either case to engage one or both lower quadrants of the cylindrical article periphery and thereby inhibit rolling. [figure]
SEE OR SEARCH CLASS
188, Brakes,
32, for a chock recognized as a brake on the ground for that class distinguishing over the instant subclass in that it is applied to a surface other than that of a freight carrier.
