Patent ID: 8381369

Claim:
A roller zipper slide for zip fastener, comprising: a top slide body block; a bottom slide body block; a center block connected between said top slide body block and said bottom slide body block; an internal chamber defined in between said top slide body block and said bottom slide body block; and a crown located on a top side of said top slide body block for holding a pull tab, wherein said top slide body block has a longitudinal slot cut through top and bottom sides thereof on the middle and kept in communication with said internal chamber and two coupling grooves located at two opposite lateral sides of said longitudinal slot; at least one roller is pivotally mounted in said internal chamber and coupled between said coupling grooves, said roller having two pivot pins respectively extended from two opposite lateral sides thereof and respectively pivotally coupled to said coupling grooves and a bottom side thereof projecting into said internal chamber of said roller zipper slide right above an engaging position between the left and right series of teeth of the zip fastener, and wherein said crown has an arched groove located on a bottom side thereof; said roller has a middle top side thereof rotatably coupled to said arched groove of said crown.