Dolly having elongated channel with releasable frictional securement device

A dolly for use in supporting a lower end portion of a panel-shaped support leg of an upright piano, said dolly comprising:

• (a) an elongated rigid support member formed by an elongated narrow bottom wall and a pair of laterally spaced side walls substantially coextensive with and rigidly connected along opposite longitudinal side edges of said bottom wall and extending upwardly therefrom and generally parallel to one another, said support member defining an elongated channel extending between said laterally spaced side walls and above said bottom wall, said channel being open along its upper end for receiving therethrough the lower end portion of the support leg, one of said side walls having a portion located between and spaced from opposite ends of said one side wall being cutout to define an elongated slot through which can extend a horizontal cross member which extends between the support legs at the respective opposite ends of the upright piano;
• (b) carriage means mounted to opposite ends of said support member for supporting said support member in a spaced relationship above a support surface and for undergoing movement across the support surface, said carriage means including
• (i) a pair of flanges respectively connected to and extending laterally outwardly in opposite directions from upper edges of said side walls of said support member at said opposite ends of said support member, and
• (ii) a plurality of caster wheel assemblies mounted to undersides of said flanges for rollably mounting said support member;
• and
• (c) a releasable frictional securement device adjustably mounted to said one of said side walls of said support member adjacent to an end of said slot and extendable into said channel for forceably engaging the lower end portion of the one support leg and thereby secure the dolly thereto, said securement device including
• (i) a semi-flexible flat band disposed along the interior of a portion of said one side wall of said support member and attached thereto at one end of said band, and
• (ii) an adjustment element mounted to said one side wall for engaging an opposite end of said band at an inner end of said adjustment element for forcing said band into frictional contact with the surface of the lower end portion of the support leg.