Couplings for machines namely couplings that connect machine attachments to earth movers and construction machines, as well as for earthwork machinery, with the exception of land vehicles; couplings for loading machines, with the exception of land vehicles; couplings for lifting machines, with the exception of land vehicles; couplings for above ground construction, underground and mining machines, with the exception of land vehicles; quick change couplings for use with machine attachments, wi...